Engineering Documentation
Table Of Contents
- BACnet MS/TP network
- C
- cable tray and conduit spacing 15
- circuits
- wire specifications, power trunk 26
- definition 14, 242
- wire type requirements 112
- TCU 231
- NEC requirements 21
- decision tree
- EIA 243
- equipment controllers
- communications wiring 32
- existing wiring, using 23
- initiating device circuit 243
- installation
- distance from large motors 23
- distance from variable speed drives 23
- interoperability(LON®) 243
- conduit sharing 15
- 120 ohm resistors 36
- terminating resistor 64
- patch cables 58
- power source requirements
- preferred cable type 32
- PXC Compact series
- See compact series 111
- 1.5-pair network cable 38, 39
- ALN, FLN (P1), Point Expansion Trunk, and TX-I/O IBE 26
- ALN, FLN, and TX-I/O IBE 3-wire cable 25
- BACnet ATEC or N-Variant P1 ATEC (updated hardware) power source requirements 162
- BACnet PTEC or N-Variant P1 TEC (updated hardware) power source requirements 165
- Class 2 for low-voltage applications only 27
- Class 2 for point usage only 26
- Class 2 power trunk 26
- Class 1 power trunk 26
- Class 2 point usage 26
- Ethernet basic link 27
- FLN trunk (P1) 26
- wiring diagrams
- wire type requirements
- MOV part numbers 23, 24
- MS/TP connection 144
- TIA 245
- SLC 244
- Signaling Line Circuit 244
- M
- supported point types 115
- Cimetrics routers on a BACnet MS/TP network 36
- using existing 23, 34
- third-party hardware 13
- sensor bus communication (SCOM) connection 157
- RS-485 MS/TP communications 34
- requirements (equipment controllers) 129
- MLN workstation to Ethernet using an AEM 33
- MLN workstation to Ethernet 33
- location restrictions 15
- KNX PL-Link Connection 159
- general guidelines 23
- Ethernet TCP/IP ALN 33
- Ethernet connection 147
- Ethernet communications 32
- cable tray and conduit spacing 15
- BACnet/IP ALN 33
- BACnet Programmable Terminal Equipment Controllers (PTEC) and N-Variant P1 TEC (updated hardware) 164
- Actuator Terminal Equipment Controller (ATEC) BACnet or N-Variant P1 162
- 3-wire RS-485 network interface 35
- wiring
- compact series 112
- TX-I/O Island Bus Expansion 25
- TX-I/O island bus 28
- punchdown block jumper cable 27
- point expansion trunk 26
- P2/P3 RS-485 ALN trunk 25
- MS/TP RS-485 FLN trunk 25
- LON network 27
- Ethernet patch cable 27
- Class 2, low-voltage applications 27
- Class 2 power trunk 26
- BACnet/IP & Ethernet TCP/IP ALN trunk 25
- ALN trunk 26
- 1.5-pair cable 39
- wire specifications
- wire resistance values 76
- W
- voltage drop, calculating 76
- V
- UTP 245
- U
- wire specifications 25, 28
- TX-I/O island bus
- transients, controlling 23, 24
- third-party hardware 13
- THHN 245
- TX-I/O island bus wiring 28
- recommended 1.5-pair cable types 38
- punch down block jumper cable 27
- preferred cable type 32
- power supply 130
- network cable sharing and distances from higher power cables 40
- MOV information 23
- MOv information 24
- maximum apparent power (VA) for transformer sizing 131
- LON networking wiring 27
- KNX/PL-Link interface power consumption 161
- Ethernet patch cable 27
- Ethernet basic link 27
- equipment controller wire type requirements 129
- distance per 2-wire trunk section 47
- conduit fill—NEC requirements 21
- conduit fill 21
- Class 1 power trunk 26
- 3-wire RS-485 network interface terminal wiring 38
- table
- T
- system (LON®) 245
- sub-system (LON®) 245
- Structured Cable System 245
- STP 245
- snubber 244
- service box, PX series 113
- SCS segments 56
- S
- RS-485 reference terminator 45
- 3-wire device interface 38
- RS-485 network
- communications wiring 34
- RS-485 MS/TP
- regulatory subjects 13
- radio frequency transmitter limitations 14
- R
- Compact series 111
- PXC product family
- PX series service box 113
- PXC series 93
- compact series 113
- BACnet equipment controllers 129
- MBC/RBC 183
- Power Source
- wire specifications 26
- point expansion trunk
- plenum cable 244
- two-port repeater, LonWorks 62, 63, 64
- three-port repeater, LonWorks 62, 63, 64
- resistors, LonWorks 65
- Patch Cables 58
- Multi-Drop Trunk Terminator 51
- Metal Oxide Varistors (MOVs) 24
- 3-wire network RS-485 reference terminator 45
- part numbers
- parallel wire runs 15
- P
- node (LON®) 244
- network wiring requirements decision tree 37
- Network Termniators 24
- smoke and flame characteristics 18
- conduit fill requirements 21
- communications requirements 18
- Article 800 18
- Article 760 19
- Article 725 14, 19
- Article 250 17
- National Electric Code (NEC) 244
- N
- MLN 244
- Metal Oxide Varistors (MOVs), part numbers 24
- Metal Oxide Varistors (MOVs) 24
- installing across DO relay contacts 130
- compact series 114
- Metal Oxide Varistors
- definition of terms 243, 244, 245
- LON®
- wire specifications 27
- LON network
- line voltage MOVs 114
- lay 243
- large motors, definition 23
- L
- IEEE 802.3 27
- IEEE 243
- IDC 243
- I
- using conduit 17
- standby power systems 17
- isolation transformers 17
- earth ground reference 17, 164
- earth ground current loops 16
- common grounding for communication circuits 18
- AI, DI, AO circuits 16
- grounding 16
- general wiring guidelines 23
- G
- wire specifications 26
- FLN trunk, P1 RS-485
- wire specifications 25
- FLN trunk, MS/TP RS-485
- F
- ALN wiring 33
- Ethernet TCP/IP
- wire specifications, patch cable 27
- wire specifications, basic link 27
- wire specifications 27
- MLN workstation wiring 33
- Ethernet
- wire type requirements 129
- EMI 243
- electrical noise 23, 36
- reference 17, 164
- current loops 16
- earth ground
- E
- network wiring requirements 37
- D
- non-metallic conduit 15
- conduit spacing 15
- conduit sharing guidelines 15
- number of cables per conduit size 21
- 40% fill 21
- conduit fill
- using for equipment grounding 17
- conduit
- conductor
- universal I/O 114
- supported point types 114
- power source requirements 113
- Metal Oxide Varistors 114
- analog output powered devices 113
- analog input powered devices 113
- compact series
- FLN trunk (P1) 47
- Ethernet 32
- ALN trunk 47
- communications wiring
- power limited circuits 14
- Class 3
- wire specifications, power trunk 26
- wire specifications, point usage 26
- wire specifications, low-voltage 27
- power limited circuits 14
- definition 14, 242
- Class 1/Class 2 separations 15
- Class 2
- remote control circuits 14
- power limited circuits 14
- definition 14, 242
- Class 1/Class 2 separations 15
- Class 1
- Class 3 14
- Class 2 14
- Class 1 14
- Cimetrics BACnet router, using 36
- cable tray spacing 15
- Cimetrics router 36
- power source requirements 129
- BACnet equipment controllers
- ALN wiring 33
- BACnet 242
- B
- using existing wiring 34
- APOGEE Ethernet Microserver 33
- ANSI 242
- wire specifications 26
- P2/P3 RS-485 wire specifications 25
- BACnet/IP & Ethernet TCP/IP wire specifications 25
- ALN trunk
- AIC 242
- AEM—see APOGEE Ethernet Microserver 33
- ACN 242
- ACH 242
- A
- 3-wire RS-485 network interface 38
- 36-point Compact
- 3
- supported point types 114
- 24-point Compact
- 2
- supported point types 114
- 16-point Compact
- 1.5-pair network cable 38, 39
- 1
- Copyright Notice
- Notice
- Document information is subject to change without notice by Siemens Industry, Inc. Companies, names, and various data used in examples are fictitious unless otherwise noted. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of Siemens Industry, Inc.
- Warning
- This equipment generates, uses, and can radiate radio frequency energy. If equipment is not installed and used in accordance with the instructions manual, it may cause interference to radio communications. Equipment has been tested and found to comply within the limits for a Class B digital device pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference. Residential area equipment users are required to take whatever measures necessary to correct the interference at their own expense.
- Service Statement
- Control devices are combined to make a system. Each control device is mechanical in nature and all mechanical components must be regularly serviced to optimize their operation. Siemens Industry, Inc. branch offices and authorized distributors offer Technical Support Programs that will ensure continuous, trouble-free system performance.
- For further information, contact your nearest Siemens Industry representative.
- Copyright 2021 Siemens Industry, Inc.
- FCC Regulations
- The manual for an intentional or unintentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible could void the user’s authority to operate the equipment.
- For a Class B digital device or peripheral, the instructions furnished the user shall include the following or similar statement, placed in a prominent location in the text of the manual:
- To the Reader
- Your feedback is important to us. If you have comments about this manual, please submit them to: SBT_technical.editor.us.sbt@siemens.com
- Credits
- APOGEE, APOGEE GO, InfoCenter Administrator, InfoCenter Report Manager, InfoCenter Server, InfoCenter Suite, and Insight are registered trademarks of Siemens Industry, Inc.
- Desigo® and Desigo® CC™ are registered trademarks of Siemens Schweiz AG.
- Other product or company names mentioned herein may be the trademarks of their respective owners.
- Printed in the USA.
- Table of Contents
- How to Use This Manual 11
- Chapter 1 – Wiring Regulations and Specifications 13
- Regulatory Subjects 13
- Circuit Classes 14
- Radio Frequency Transmitter Limitations 14
- Conduit Sharing—Class 1/Class 2 Separations 15
- Network Wiring Location Restrictions 15
- Parallel Wire Runs 15
- Grounding 16
- National Electrical Code Grounding Guidelines Compliance 16
- Earth Ground Current Loops 16
- Single Earth Ground for AI, DI, and AO Circuits 17
- Equipment Grounding System Requirements 17
- NEC Article 250 Specifications 17
- National Electric Code (NEC) Communications Requirements 18
- Smoke and Flame Characteristics 18
- Common Grounding for Communication Circuits 18
- Conduit Fill 21
- Cables per Conduit Size – Siemens Industry Recommendation 21
- Cables per Conduit Size—NEC Requirements 21
- General Wiring Guidelines 23
- Controlling Transients 24
- Network Terminators 24
- Wire Specification Tables 25
- Chapter 2 – Network Electrical Systems 30
- Dual Port Ethernet Controller Topology Basics 30
- Ethernet Communications Wiring 33
- MLN—Workstation to Ethernet Wiring 34
- ALN—Workstation to Field Panel Ethernet Wiring 34
- Ethernet/IP ALN 34
- BACnet/IP ALN 34
- APOGEE Ethernet Microserver (AEM)—Remote ALN 35
- Using Existing Wiring 35
- RS-485 MS/TP Communications 36
- Using Cimetrics Routers on an APOGEE BACnet MS/TP Network 37
- Network Wiring Requirements Decision Tree 39
- 3-Wire Interface Nodes 40
- 1.5-Pair Network Cable 40
- 1.5-pair Cable Specifications 42
- Network Loading 42
- 3-Wire Devices on a 2-Wire or 3-Wire Network Master Controller/Higher Level Controller 43
- Network Repeater for 3-Wire Networks 45
- 3-Wire Network Terminator (550-975P100, Pkg. of 100) 47
- 3-Wire Network RS-485 Reference Terminator (550-974P10 Pkg. of 10) 47
- BACnet Nodes on Siemens Controllers or Third-Party Equipment (Using 1.5 pr cable) 48
- RS-485 ALN (P2/P3) and FLN (P1) Trunk Communications Wiring 49
- BACnet RS-485 FLN 49
- Multi-Drop Trunk Cabling Limits 50
- RS-485 ALN Trunk Shield Connection Using 2-Wire Cabling 50
- RS-485 FLN (P1) Trunk Shield Connection 51
- Communications Ground 52
- Multi-Drop Trunk Terminator 53
- RS-485 2-Wire Network Devices 54
- High Speed Trunk Interface (HSTIE) 54
- RS-485 ALN and FLN (P1) Communications Wiring on Structured Cabling 56
- Installation 56
- Use of Shielded and Unshielded Twisted Pair Cable 56
- Sheath Sharing and Cable Routing 56
- Riser Segment Length 57
- Converting SCS Star Segments to RS-485 ALN and FLN Chain Segments 58
- Punch Down Jumper Wires 59
- Patch Cables 60
- Converting Chain Segments to SCS Star Segments 61
- LONWORKS FLN Communications Wiring 62
- Network Requirements 62
- Communication Wiring Requirements 63
- Nodes per Subnet/Network 64
- Electrical Loads 64
- Segment 64
- Wiring Between Buildings 65
- Repeater Depth 65
- Network Speeds 65
- Conduit Sharing 65
- Wire Lengths 65
- Network Wiring 66
- LonWorks FLN Network Terminations 67
- Recommended Terminator Installation 67
- Power Trunk Guidelines 67
- Class 2 Power Sources 68
- Inherently Limited Class 2 Power Source 68
- Not Inherently Limited Class 2 Power Source 68
- Class 2 Power Trunks 69
- Grounding 69
- Restrictions 69
- Power Trunk Layout 72
- Step 1 - Determine the VA Rating for Each Controller 72
- Step 2 - Determine the Number of Power Trunks Required 73
- Step 3 - Determine the Wiring Runs and Calculate the Voltage Available at the Last Controllers of Each Trunk Type 75
- Step 4 - Select and Locate the Transformers 79
- Chapter 3 – Field Panels 81
- Control Circuit Point Wiring 81
- LFSSL (Logical FAST/SLOW/STOP Latched) 81
- LFSSP (Logical FAST/SLOW/STOP Pulsed) 82
- LOOAL (Logical ON/OFF/AUTO Latched) 83
- LOOAP (Logical ON/OFF/AUTO Pulsed) 83
- L2SL (Logical Two State Latched) 84
- L2SP (Logical Two State Pulsed) 85
- PX Series Service Boxes 86
- PX Series 115V Service Boxes (192 VA or 384 VA) 87
- PX Series 230V Service Boxes (192 VA or 384 VA) 88
- PX Series Service Box Grounding 88
- Multiple PX Series Service Boxes on One Power Source 91
- PXC Service Box Dimensions 92
- TX-I/O Product Range 93
- Wire Type Requirements 93
- Power Source Requirements 95
- Powering Options 96
- Metal Oxide Varistors (MOVs) 96
- TX-I/O Island Bus Guidelines 97
- TX-I/O Island Bus Power and Communication Options 98
- TX-I/O Module Support 99
- TX-I/O Island Bus Wiring Diagrams 100
- TX-I/O Island Bus Extension Cable Options 103
- TX-IO Module Wiring Diagrams 105
- Symbols 105
- Digital Input Modules (TXM1.8D and TXM1.16D) 106
- Digital Output Modules (TXM1.6R and TXM1.6R-M) 108
- Universal and Super Universal Modules (TXM1.8U and TXM1.8U-ML; TXM1.8X and TXM1.8X-ML) 110
- PXC Compact Series Controller 113
- Wire Type Requirements 114
- Power Source Requirements 115
- Powering Options 115
- Metal Oxide Varistors (MOVs) 116
- PXC Compact Series Universal I/O 116
- Compact Series Sensor Wiring 118
- PXC Compact Series Wiring Diagrams 119
- Analog Input, Internally Powered; Supervised 120
- Analog Input, Externally Powered; Supervised 121
- Analog Input, RTDs or Thermistors; Supervised 122
- Analog Output, 0-10 Vdc; Not Supervised 123
- Analog Output, 0-20 mA 124
- Digital Input, Dry Contacts; Not Supervised 126
- Digital Input, Pulse Accumulating; Not Supervised 127
- Digital Output, Pulsed or Latched; Not Supervised 128
- Point Expansion or Conversion 128
- AO-P Transducer 128
- AO-P Transducer Wiring Diagram 130
- Chapter 4 – Equipment Controllers 131
- Wire Type Requirements 131
- Power Source Requirements 131
- Metal Oxide Varistors (MOVs) 132
- BACnet DXR2 Room Automation Station 132
- Engineering 134
- Connection Terminals 136
- MS/TP Connection 146
- Pressurized room with or without Fume Hoods (MSTP) 147
- Airflow communication network (F-COM) 149
- Ethernet Connection 149
- Pressurized Rooms with Fume Hoods (Ethernet) 150
- Sensor Bus Communication (SCOM) Connection 159
- KNX PL-Link Connection 161
- Actuator Terminal Equipment Controller (ATEC) BACnet or N-Variant P1 164
- BACnet Programmable Terminal Equipment Controllers (PTEC) and N-Variant P1 TEC (Updated Hardware) 166
- Appendix A – Discontinued Products 171
- Modular Equipment Controller (MEC) and Point Expansion Module (PXM) 171
- Wire Type Requirements 171
- Power Source Requirements 172
- Powering Options 173
- Point Bus Wiring Restrictions 173
- Multiple MECs on One Power Source 173
- Metal Oxide Varistors (MOVs) 173
- MEC and PXM Wiring Diagrams 174
- Analog Input 174
- Analog Output 176
- Digital Input 177
- Digital Output 178
- Universal Inputs 178
- MEC Service Boxes 179
- Multiple Service Boxes on One Power Source 180
- 115V Version 180
- 230V Version Service Box 181
- Modular Building Controller/Remote Building Controller (MBC/RBC) 183
- Wire Type Requirements 183
- Power Source Requirements 184
- Class 1/Class 2 Separations 185
- Multiple MBCs/RBCs on One Power Source 185
- Metal Oxide Varistors (MOVs) 186
- MBC/RBC Service Box Wiring Diagrams 187
- Point Termination Modules 188
- Metal Oxide Varistors (MOVs) 188
- Wiring Point Termination Modules 188
- Point Termination Module Wiring Diagrams 191
- Analog Input 192
- Full-Featured Sensor 193
- Analog Output 194
- Digital Input 195
- Digital Output 197
- LFSSL (Logical FAST/SLOW/STOP Latched) 197
- LFSSP (Logical FAST/SLOW/STOP Pulsed) 198
- LOOAL (Logical ON/OFF/AUTO Latched) 200
- LOOAP (Logical ON/OFF/AUTO Pulsed) 201
- L2SL (Logical Two State Latched) 203
- L2SP (Logical Two State Pulsed) 205
- FLN Controller 206
- Wire Type Requirements 206
- Power Source Requirements 206
- Point Wiring Restrictions 207
- Metal Oxide Varistors (MOVs) 207
- Stand-alone Control Unit (SCU) 207
- Wire Type Requirements 207
- Power Source Requirements 208
- Point Wiring Restrictions 208
- Multiple SCUs on One Power Source 209
- Metal Oxide Varistors (MOVs) 209
- Digital Outputs 210
- Network Devices 211
- Multi-Point Unit/Digital Point Unit (MPU/DPU) 211
- Wire Type Requirements 211
- Power Source Requirements 212
- MPU Grounding 212
- Metal Oxide Varistors (MOVs) 213
- Digital Output (DO) Wiring 215
- Terminal Equipment Controller—Pneumatic Output, Low Voltage 215
- Terminal Equipment Controllers—Pneumatic Output 215
- Pneumatic Output Controller 216
- LonMark® Terminal Equipment Controller (LTEC) 217
- Wire Type Requirements 217
- Power Source Requirements 218
- LTEC Wiring Diagrams 219
- Terminal Control Unit (TCU) 233
- Wire Type Requirements 233
- Power Source Requirements 234
- Digital Output (DO) Wiring 234
- Grounding 235
- Metal Oxide Varistors (MOVs) 235
- Unitary Controller (UC) 235
- Wire Type Requirements 235
- Power Source Requirements 236
- Digital Output (DO) Wiring 236
- Metal Oxide Varistors (MOVs) 236
- Terminal Equipment Controllers (APOGEE Legacy Controllers) 237
- Wire Type Requirements 237
- Power Source Requirements 237
- Terminal Equipment Controllers (TEC) (Legacy Hardware) 238
- Digital Output (DO) Wiring 241
- Terminal Equipment Controllers - Pneumatic Output 241
- BACnet Terminal Equipment Controllers (BTEC) (Legacy Hardware) 242
- Glossary 244
- Index / 248
- How to Use This Manual
- This wiring guidelines manual was developed to reduce the installed cost of Siemens Industry energy management systems through consistent estimating, installation, and operation. It provides information that can be shared with electrical contractors for proposals and training purposes. This manual does not provide wiring guidelines for specific field devices.
- This section covers manual organization, manual conventions and symbols used in the manual, how to access help, related publications, and any other information that will help you use this manual.
- Manual Organization
- This manual contains the following chapters:
- ● Chapter 1, Wiring Regulations and Specifications, contains Regulatory and general wiring requirements for installing APOGEE products.
- ● Chapter 2, Network Electrical Systems, contains communications wiring guidelines for various network systems and the power trunk.
- ● Chapter 3, Field Panels, describes the wiring guidelines for Automation Level Network (ALN) devices that are currently available for purchase.
- ● Chapter 4, Equipment Controllers, describes the wiring guidelines for Field Level Network (FLN) controllers that are currently available for purchase.
- ● Appendix A, Discontinued Products, describes the wiring guidelines for discontinued ALN and FLN devices.
- ● The Glossary describes the terms and acronyms used in this manual.
- ● An Index helps you locate information presented in this manual.
- Manual Conventions
- The following table lists conventions to help you use this manual in a quick and efficient manner.
- 1. Turn OFF power to the field panel.
- Numbered Lists (1, 2, 3…) indicate a procedure with sequential steps.
- 2. Turn ON power to the field panel.
- 3. Contact the local Siemens Industry representative.
- ⊳Composer software is properly installed.
- Conditions that must be completed or met before beginning a task are designated with a ⊳.
- ⊳A Valid license is available.
- 1. Select Start > Programs > Siemens > GMS > Composer.
- Intermediate results (what will happen following the execution of a step), are designated with a ⇨.
- ⇨The Project Management window displays.
- 2. Open an existing project or create a new one.
- Results, which inform the user that a task was completed successfully, are designated with a ⇨.
- ⇨The project window displays.
- Type F for Field panels.
- Actions that should be performed are specified in boldface font.
- Click OK to save changes and close the dialog box.
- The message Report Definition successfully renamed displays in the status bar.
- Error and system messages are displayed in Courier New font.
- The field panel continuously executes a user-defined set of instructions called the control program.
- New terms appearing for the first time are italicized.
- This symbol signifies Notes. Notes provide additional information or helpful hints.
- For more information on creating flowcharts, see Flowcharts [→92].
- Cross references to other information are indicated with an arrow and the page number, enclosed in brackets: [→92]
- Type A C D H [username] [field panel #].
- Placeholders indicate text that can vary based on your selection. Placeholders are specified in bold print, and enclosed with brackets [ ].
- Manual Symbols
- The following table lists the safety symbols used in this manual to draw attention to important information.
- Equipment damage may occur if a procedure or instruction is not followed as specified. (For online documentation, the NOTICE displays in white with a blue background.)
- CAUTION
- Minor or moderate injury may occur if a procedure or instruction is not followed as specified.
- CAUTION
- Personal injury or property damage may occur if a procedure or instruction is not followed as specified.
- WARNING
- Electric shock, death, or severe property damage may occur if a procedure or instruction is not followed as specified.
- DANGER
- Getting Help
- For more information about APOGEE products, contact your local Siemens Industry representative.
- Where to Send Comments
- Your feedback is important to us. If you have comments about this manual, please submit them to SBT_technical.editor.us.sbt@siemens.com
- Chapter 1 – Wiring Regulations and Specifications
- Chapter 1 discusses the following topics:
- ● Regulatory Subjects [➙ 13]
- ● Conduit Sharing—Class 1/Class 2 Separations [➙ 15]
- ● Network Wiring Location Restrictions [➙ 15]
- ● Grounding [➙ 16]
- ● National Electric Code (NEC) Communications Requirements [➙ 18]
- ● Conduit Fill [➙ 21]
- ● General Wiring Guidelines [➙ 23]
- ● Controlling Transients [➙ 24]
- ● Wire Specification Tables [➙ 25]
- The wiring procedures described in this manual are based on the following:
- ● National Electrical Code (NEC) requirements, articles 250, 725, and 800
- ● Underwriter’s Laboratories (UL) and Canadian Standards Association (CSA) listing requirements
- ● ANSI/TIA/EIA-862 Building Automation Systems (BAS) Cabling Standard for Commercial Buildings
- ● Electromagnetic Interference (EMI) issues
- ● Economic considerations
- CAUTION
- Always refer to local codes or the local authorities having jurisdiction before proceeding.
- ATTENTIONVeuillez vous référer aux règlementations locales en vigueur avant toute intervention.
- Specific details on cable usage and specifications can be found in these guidelines. In some cases, these guidelines are stricter than NEC or local requirements to avoid costly operational problems caused by EMI. This will improve customer satisfaction and decrease the total installed cost of a job by minimizing costly callbacks.
- Third-party hardware, such as Digital Equipment Corporation equipment, purchased instrumentation, etc., should be wired according to the manufacturer's recommendations.
- Article 725 of the NEC applies to building control system installations and defines different classes of circuits. As applied to Siemens Industry, Inc. Building Automation Systems, these are:
- ● Class 1 Remote Control Circuits
- ● Class 1 Power Limited Circuits
- ● Class 2 Power Limited Circuits
- ● Class 3 Power Limited Circuits
- Class 1 Remote Control Circuits
- Circuits not exceeding 600 volts, used for controlling equipment. Typically, this covers DO-type circuits used to control motors by energizing motor starters. These DO circuits are also used to control lights and other items through pilot devices such as relays or electro-pneumatic valves.
- Class 1 Power Limited Circuits
- Circuits not exceeding 30 volts and 1000VA. Typically, this covers power trunks.
- Class 2 Power Limited Circuits
- Circuits of relatively low power (such as 24 volts and up to 4 amps).
- This covers the bulk of our circuits and includes the ALN communication wiring (Ethernet TCP/IP, P2/P3 RS-485, and MS/TP RS-485), all FLN bus wiring (P1 RS-485, LON, and MS/TP RS-485), 24 Vac power trunk wiring (with 100 VA power limit), and DI, AI, and AO circuits.
- Class 3 Power Limited Circuits
- Circuits of relatively low power but of higher voltage than Class 2 (such as 120 volts and up to 1 amp). This circuit would be achieved if 1 amp fuses were installed in a 120-volt DO-type circuit. This is not a common application.
- See the Field Purchasing Guide for recommended wire. The wire listed in the Field Purchasing Guide has been selected to meet the requirements of the APOGEE product line.
- CAUTION
- Keep devices that can generate Radio Frequency Interference (RFI), such as Electro-pneumatic devices (EPs), relays, and walkie-talkies, at least 12 feet (3.7 m) away from all field panels.
- NOTE:Separate knockouts should be used for high voltage and low voltage wiring. Leave at least 2 inches (50.8 mm) of space between the Class 2 wires and other wires in the panel.
- Conduit sharing guidelines are based on the National Electrical Code (NEC) requirements that apply to the installation wiring of building automation systems.
- ● All wire must have insulation rated for the highest voltage in the conduit and must be approved or listed for the intended application by agencies such as UL, CSA, FM, etc. Protective signaling circuits cannot share conduit with any other circuits.
- ● Class 2 point wiring cannot share conduit with any Class 1 wiring except where local codes permit.
- ● Where local codes permit, both Class 1 and Class 2 wiring can be run in the field panel enclosure, providing the Class 2 wire is UL listed 300V 75°C (167°F) or higher, or the Class 2 wire is NEC type CM (FT4) (75°C or higher) or CMP (FT6) (75°C or higher).
- ● NEC type CL2 and CL2P is not acceptable unless UL listed for other type and rated for 300V 75°C (167°F) or higher.
- ● All low voltage and high voltage wiring must be routed separately within an enclosure so that low voltage and high voltage wiring cannot come in contact with each other.
- CAUTION
- Only low voltage signal wiring should be run on a low voltage tray.
- Do not place I/O or trunk wire in a tray used to carry Class 1 power wiring.
- Cable tray spacing
- The minimum space between adjacent trays or from a top tray to a lower tray.
- Cable tray and conduit spacing
- The minimum distance between a cable tray and adjacent conduit.
- Conduit spacing
- Use cable tray spacing for non-metallic conduit.
- The minimum distance between adjacent conduit runs.
- The following guidelines reflect the recommendations given in IEEE 518-1982 for locating network wiring in proximity to sources of interference:
- ● For (ALN) trunk AIs, AOs, and DIs with circuits greater than 120 volts and carrying more than 20 amps:
- – Cable tray spacing = 26 in. (660.4 mm)
- – Cable tray and conduit spacing = 18 in. (457.2 mm)
- – Conduit spacing = 12 in. (304.8 mm)
- ● For circuits greater than 1000 volts or greater than 800 amps:
- – Cable tray spacing = 5 ft (1.5 m)
- – Cable tray and conduit spacing = 5 ft (1.5 m)
- – Conduit spacing = 2.5 ft (0.8 m)
- The following topics are discussed in this section:
- ● National Electrical Code Grounding Guidelines Compliance [➙ 16]
- ● Earth Ground Current Loops [➙ 16]
- ● Single Earth Ground for AI, DI, and AO Circuits [➙ 17]
- ● Equipment Grounding System Requirements [➙ 17]
- Grounding must comply with National Electrical Code (NEC) guidelines for grounding of electrical equipment. Under no circumstances should equipment be installed in violation of local electrical codes. In most cases, NEC guidelines have been incorporated into local electrical codes.
- Earth ground current loops can interfere with AI, DI, and AO circuits. Building electrical grounds connected to the automation system must be referenced to the same potential levels within a facility.
- CAUTION
- Conduit entering an enclosure must be grounded to the enclosure.
- If a poor electrical connection is found, scrape off the paint under the conduit locknut, tighten the locknut, and retest.
- ● AI, DI, and AO circuits cannot be earth grounded at two points.
- ● The earth ground reference point on the controlling Building Automation System (BAS) equipment is the only place where AI, DI, or AO can be earth grounded; this is dependent on circuit design.
- Earth Ground Reference
- The earth ground reference for all field panels and equipment controllers must be supplied via a third wire run, with the AC power source providing power to that cabinet. All AC power sources must be bonded per NEC 250 unless isolation is provided between the cabinets.
- Equipment Grounding Conductor
- The NEC and some building authorities allow the use of conduit as the equipment grounding conductor. Field panels require a third wire or heavy wall conduit (with threaded connections) for the equipment grounding conductor. In addition to an equipment grounding conductor, you may use building steel or water pipes to bond AC power sources if these are part of the earth grounding system approved by the Local Building Authority.
- When setting up an equipment grounding system, which consists of an equipment ground connected to an earth ground, you must provide a third wire equipment grounding conductor for any products of Siemens Industry. The equipment grounding conductor must connect to neutral at only one point in the system; that point is the neutral side of the transformer providing power to the equipment being installed. The hot, neutral, and third wire conductors must all be contained in the same conduit (see Figure Earth Grounding System [➙ 17]). This third wire may be connected to earth at more than one point (that is, Siemens Industry does not require an isolated equipment grounding conductor).
- Grounding of Isolation Transformers and Standby Power Systems
- The installation of isolation transformers and standby power systems follow the same rules as equipment grounding requirements. Again, the neutral side of the locally derived power system must be tied to the nearest approved earth grounding system.
- NEC article 250 states that the path-to-ground from circuits, equipment and metal enclosures for conductors shall:
- 1. Be permanent and continuous
- 2. Have capacity to safely conduct any fault current likely to be imposed on it, and
- 3. Have sufficiently low impedance to limit the voltage-to-ground and to facilitate the operation of circuit protection devices.
- The NEC requires that all loads on a power source have their neutral side referenced to the power source neutral and that the power source neutral be connected to the earth grounding system at only one point. This is very important in preventing ground loops. If building steel is not the shortest path, then you must use a water pipe or other earth ground as designated by the local authority. You may still connect to building steel, although the water pipe is your approved earth grounding reference; however, you cannot connect from your source to steel, and then to the water pipe. Each wire must be separate and of the correct gauge.
- /
- Fig. 1: Earth Grounding System.
- The following topics are discussed in this section:
- ● Smoke and Flame Characteristics [➙ 18]
- ● Common Grounding for Communication Circuits [➙ 18]
- The National Electrical Code (NEC) requires that communication and signaling cables in a building shall be listed for both smoke and flame characteristics suitable for the purpose.
- NEC Article 800 requires communications circuits to use a common ground. Use one of the following methods:
- ● Bond service grounds with No. 6 wire per NEC 250.
- ● Isolate communications circuits on separate services with an HSTIE or Fiber Optic Trunk Interface on each service.
- NEC Article 800 covers communication wiring:
- Use in plenums.
- CMP
- Use in risers.
- CMR
- General purpose.
- CM
- Residential and restricted commercial.
- CMX
- NEC Article 725 covers Class 1, Class 2, and Class 3 remote control, signaling and power limited circuits:
- Use in plenums.
- CL2P
- Use in risers.
- CL2R
- General purpose.
- CL2
- Residential and restricted commercial.
- CL2X
- NEC Article 760 covers fire protective signaling systems.
- Use in plenums.
- FPLP
- Use in risers.
- FPLR
- General purpose.
- FPL
- Multi-purpose cable types can be substituted for the cables listed in the applications shown above. The multi-purpose cable types are as follows:
- Use in plenums.
- MPP
- Use in risers.
- MPR
- General purpose.
- MP
- General purpose.
- PLTC
- The following figure depicts the cable interchanges permitted by the NEC.
- /
- Fig. 2: Interchanges Permitted by National Electric Code.
- All wire must have insulation rated for the highest voltage in the conduit and must be approved or listed for the intended application by agencies such as UL, CSA, FM, etc.
- The following tables contain wire specifications. For more information, see Circuit Classes [➙ 14] and Conduit Sharing–Class1/Class2 Separations [➙ 15] in this chapter and Using Existing Wiring [➙ 35] in Chapter 2.
- Siemens Industry recommends a 40 percent conduit fill. Use the following table to determine the number of cables (twisted pairs and twisted shielded pairs) per conduit size at 40% fill. Plenum wiring can be used in place of any low voltage wiring without changes to length. The Field Purchasing Guide lists the outside diameter for each cable.
- Conduit Fill.
- Quantity in Conduit at 40% Fill
- Outside Diameter1)
- 2"(50.8 mm)
- 1 1/2"(38.1 mm)
- 1 1/4"(31.8 mm)
- 1"(25.4 mm)
- 3/4"(19.1 mm)
- 1/2"(12.7 mm)
- 16
- 10
- 7
- 4
- 3
- 1
- 0.325" (8.255 mm)
- 19
- 12
- 8
- 5
- 3
- 2
- 0.3" (7.62 mm)
- 27
- 17
- 12
- 7
- 4
- 2
- 0.25" (6.35 mm)
- 34
- 20
- 15
- 9
- 5
- 3
- 0.225" (5.715 mm)
- 43
- 26
- 19
- 11
- 7
- 4
- 0.2" (5.08 mm)
- 56
- 34
- 25
- 14
- 9
- 5
- 0.175" (4.445 mm)
- 76
- 46
- 34
- 20
- 12
- 7
- 0.15" (3.81 mm)
- 109
- 66
- 49
- 28
- 17
- 10
- 0.125" (3.175 mm)
- Plenum-rated cable generally has a smaller diameter than equivalent non-plenum types. Check specific product tables in this chapter for specific applications where plenum cable must be used in conduit.
- NEC allowable conduit fill is 53 percent for 1 conductor, 31 percent for 2 conductors, and 40 percent for 3 or more conductors. Use the following table to determine the number of cables (twisted pairs and twisted shielded pairs) per conduit size in accordance with NEC fill requirements. The Field Purchasing Guide lists the outside diameter for each cable.
- ● Protective signaling circuits cannot share conduit with any other circuits.
- ● Class 2 circuits cannot share conduit with Class 1 circuits except as noted.
- Nominal Conduit Fill—NEC Requirements.
- Quantity in Conduit2)
- Conduit I.D. Area
- Insulated Conductor
- O.D. (inches) 1)
- 10
- 6
- 5
- 2
- 1
- 1
- 0.126
- 0.400
- 11
- 7
- 5
- 3
- 1
- 1
- 0.119
- 0.390
- 12
- 7
- 5
- 3
- 1
- 1
- 0.113
- 0.380
- 12
- 7
- 5
- 3
- 1
- 1
- 0.108
- 0.370
- 13
- 8
- 6
- 3
- 1
- 1
- 0.102
- 0.360
- 14
- 8
- 6
- 3
- 1
- 1
- 0.096
- 0.350
- 15
- 9
- 6
- 4
- 2
- 1
- 0.091
- 0.340
- 15
- 9
- 7
- 4
- 2
- 1
- 0.086
- 0.330
- 16
- 10
- 7
- 4
- 2
- 1
- 0.080
- 0.320
- 18
- 11
- 8
- 4
- 3
- 1
- 0.075
- 0.310
- 19
- 11
- 8
- 5
- 3
- 1
- 0.071
- 0.300
- 19
- 12
- 8
- 5
- 3
- 1
- 0.068
- 0.295
- 20
- 12
- 9
- 5
- 3
- 1
- 0.066
- 0.290
- 21
- 13
- 9
- 5
- 3
- 1
- 0.064
- 0.285
- 22
- 13
- 9
- 5
- 3
- 1
- 0.062
- 0.280
- 22
- 13
- 10
- 6
- 3
- 1
- 0.059
- 0.275
- 24
- 15
- 11
- 6
- 4
- 1
- 0.055
- 0.265
- 26
- 16
- 11
- 7
- 4
- 2
- 0.051
- 0.255
- 28
- 17
- 12
- 7
- 4
- 2
- 0.047
- 0.245
- 31
- 19
- 14
- 8
- 5
- 3
- 0.043
- 0.235
- 33
- 20
- 15
- 8
- 5
- 3
- 0.040
- 0.225
- 37
- 22
- 16
- 9
- 6
- 3
- 0.036
- 0.215
- 40
- 24
- 18
- 10
- 6
- 3
- 0.033
- 0.205
- 45
- 27
- 20
- 11
- 7
- 4
- 0.030
- 0.195
- 50
- 30
- 22
- 13
- 8
- 4
- 0.027
- 0.185
- 56
- 34
- 25
- 14
- 9
- 5
- 0.024
- 0.175
- 63
- 38
- 28
- 16
- 10
- 5
- 0.021
- 0.165
- 71
- 43
- 31
- 18
- 11
- 6
- 0.019
- 0.155
- 81
- 49
- 36
- 21
- 13
- 7
- 0.017
- 0.145
- 94
- 57
- 42
- 24
- 15
- 8
- 0.014
- 0.135
- 109
- 66
- 48
- 28
- 17
- 10
- 0.012
- 0.125
- 129
- 78
- 57
- 33
- 20
- 11
- 0.010
- 0.115
- 155
- 94
- 69
- 40
- 24
- 14
- 0.009
- 0.105
- 189
- 115
- 84
- 49
- 30
- 17
- 0.007
- 0.095
- 236
- 143
- 105
- 61
- 37
- 21
- 0.006
- 0.085
- 304
- 184
- 135
- 78
- 48
- 27
- 0.004
- 0.075
- 404
- 245
- 180
- 104
- 64
- 36
- 0.003
- 0.065
- Plenum rated cable generally has a smaller diameter than equivalent non-plenum types. Check the tables in this section for specific applications where plenum cable must be used in conduit.
- Based on NEC guidelines. Allowable fill: 53% for 1 conductor, 31% for 2 conductors, and 40% for 3 or more conductors.
- When installing an APOGEE Automation System in a building that is already equipped with a Building Automation System (BAS), the existing wiring can be used if the general guidelines in this section and the specific guidelines in Chapter 2 – Network Electrical Systems [➙ 30]are followed.
- In many instances, existing conductors in a building may also be used for the trunk as long as they meet the requirements listed in the Network Electrical Systems [➙ 30] chapter.
- ● Only APOGEE low voltage input signals are present in multi-pair cables.
- ● Multi-pair cable containing inductive loads is not shared with any APOGEE trunk or input wiring.
- ● All wiring, equipment controllers, and field panels are at least 5 ft (1.5 m) away from power sources greater than 100 kVA.
- NOTE:Verify motor generator size. Direct on line (DOL) starters for motors greater than 25 hp generally exceed 100 kVA.
- ● All equipment controllers and field panels are at least 5 ft (1.5 m) away from variable speed drives and variable frequency drives.
- ● Wire runs are limited to the lengths shown in specific product tables in this guide.
- ● Twisted pair or twisted shielded pair cable is used according to the specific product tables in this guide.
- ● Conduit-sharing rules in specific product tables in this guide are used.
- No electrical equipment such as PEs, EPs, relays, etc., can be mounted and wired in any APOGEE field panel or equipment controller unless it is specifically mentioned in the product literature. This equipment can radiate electrical noise to the circuit boards. The metal enclosure of the control cabinet will shield the electronics from equipment outside the enclosure.
- Any sensor or communication wiring that is exiting a building must have transient protection; effective protection requires proper wiring (grounding). Where protection is needed, use the parts listed in the following table.
- MOV Part Numbers.
- Application
- Description
- Part Number
- (25 pack) 3 MOV pre-twisted for use on 24 Vac 3-wire power terminals.
- MOV (3)60V Ipk 1200 amp
- 540-248
- (10 pack) MOV with ¼-inch spade terminals for use across flow switch power in VAV boxes.
- MOV 60V Ipk 4500A
- 550-809 P10
- The parts listed in the following table must be ordered from an external supplier.
- MOV Information—Order from an External Supplier.
- Application
- Description
- 24 Vac input power for use at transformer with earth grounded secondary neutral.
- MOV 30V IpK 2000 amp
- TEC damper/actuator 24 Vac outputs.
- MOV 60V IpK 1200 amp
- For use across the power line in 102V - 132V applications.
- MOV 150V IpK 6500 amp
- Termination boards or Controllers with on board digital outputs that do not have MOVs should use this part across the digital outputs. Not for use across power lines.
- MOV 208 – 250V IpK 1200 amp
- Products without digital output MOVs: DXR2, PTM6.2Q250(-M) and TXM1.6R(-M).
- Products with digital output MOVs: Compact, ATEC, TEC, BTEC, PTEC
- For use across the power line in 180V - 265V applications.
- MOV 275V IpK 2500 amp
- Duplex 15A or 20A outlet with three 150V IpK 6500 MOVs configured for 102 - 132V across the line applications (two line-to-line MOVs and one line-to-earth ground MOV).
- Receptacle Assembly with MOVs
- 12AWG with captive screw, for connecting 24 Vac neutral from Transformer to grounded enclosure chassis Protective Earth (PE) “ ” attachment point, or for connecting Equipment Controller “E” or “GND”, or Field Panel “ ” to enclosure chassis in locations with high levels of electrical noise that interfere with controller operation.
- Ground Wire
- Terminate Networks were required using following parts.
- Terminator Part Numbers.
- Application
- Description
- Part Number
- The 3-wire network requires a new network terminator. The new terminator is a 120 ohm 1/2W carbon composition resistor. One terminator must be placed at each end of the 3-wire network section.
- 3-Wire Network Terminator, Pkg. of 100
- 550-975P100
- The nodes that use a 3-wire network interface must have the RS-485 reference wire (yellow) of the network cable terminated to EARTH GROUND at ONE END ONLY through an RS-485 reference terminator.
- 3-Wire Network RS-485 Reference Terminator, Pkg. of 10
- 550-974P10
- The 2-wire P2 network terminator is a 120 ohm 1/2W carbon composition resistor in series with two surge diodes forming a capacitor. One terminator must be placed at each end of the 2-wire network section.
- PMD Trunk Terminator
- 538-664
- Converts 4 – 20 mA to 2 – 10 V input signal for devices that do not have current inputs. Consists of 499 Ohm, ½ W, 1% metal film resistor with 4 ½” 18 AWG 300V insulated leads.
- 499 OHM RESISTOR ASSEMBLY KIT
- 985-124
- NOTE:Wire that meets these specifications can be ordered from the Field Purchasing Guide under Siemens Industry corporate pricing agreements.
- ALN, FLN, and TX-I/O IBE 3-Wire Cable.1)
- 1.5-Pair (1 TP & 1 Conductor) w/overall Shield and drain wire
- Cable configuration
- 24 AWG (stranded)
- Gauge
- 12.5 pf/foot or less
- Capacitance
- 4 minimum
- Twists per foot
- 100% foil with drain wire
- Shields
- UL listed, CM, CMP (75°C or higher)
- NEC class
- FT4, FT6 (75°C or higher)
- CEC class
- Required for ALN, FLN, and BACnet MS/TP networks that use the new 3-wire interface, (/ - +); preferred for TX-I/O island bus expansion. For PXC Compact, PXC Modular, P1 BIM, and BACnet equipment controllers, use the Network Wiring Requirements Decision Tree [➙ 39] in Chapter 2 to determine if 1.5-pair or 1-pair cable should be used.
- ALN, FLN (P1), Point Expansion Trunk, and TX-I/O IBE.1)
- Twisted shielded pair (TSP)
- Cable configuration
- 24 AWG (stranded)
- Gauge
- 12.5 pf/foot or less
- Capacitance
- 4 minimum
- Twists per foot
- 100% foil with drain wire
- Shields
- UL listed, CM, CMP (75°C or higher)
- NEC class
- FT4, FT6 (75°C or higher)
- CEC class
- For use with older 2 -wire networked products. (TEC, SCU, MEC, PXM, MBC). May be used for TX-I/O island bus expansion.
- Class 1 Power Trunk.1)
- 3 conductor
- Cable configuration
- 12 AWG or 14 AWG THHN
- Gauge
- THHN
- UL type
- Circuit breaker sizes: 20 amp for 12 AWG THHN and 15 amp for 14 AWG THHN. Assumes minimum voltage of 102 Vac at circuit breaker and 5 Vac maximum voltage drop (97 Vac at loads).
- Class 2 Power Trunk.
- 2 conductor
- Cable configuration
- 14 AWG, 16 AWG, 18 AWG, 20 AWG
- Gauge
- CL2, CL2R, CL2P
- UL type
- FT4, FT6
- CSA type
- Class 2 for Point Usage Only (in Conduit and per Local Codes).1)
- Twisted pair (unjacketed) or TSP
- Cable configuration
- No. 18 to No. 22 AWG (stranded)
- Gauge
- N/A
- Capacitance
- 4 minimum
- Twists per foot
- Not required (in case of TSP, 100% foil with drain wire)
- Shields
- 300 Vac
- UL (CSA) listed voltage rating
- 75°C (167°F) or higher
- UL (CSA) listed temperature rating
- 300 Vac wire can be used in field panels containing voltages below 150 Vac.
- Class 2 for Low-Voltage Applications Only (Except Trunk).
- Twisted pair or Twisted shielded pair (TSP)
- Cable configuration
- No. 18 to No. 22 AWG (stranded)
- Gauge
- N/A
- Capacitance
- 4 minimum
- Twists per foot
- Not required (in case of TSP, 100% foil with drain wire)
- Shields
- CM, CMP, CMR (75°C or higher)
- UL type
- FT4, FT6 (75°C or higher)
- CSA type
- Ethernet Basic Link.
- 4 Unshielded Twisted Pair (UTP)
- Cable configuration
- 24 AWG (solid)
- Gauge
- 17 pf/foot @ 1 KHz, 1 MHz
- Capacitance
- Category 5e or better
- IEEE 802.3
- Optional where required
- Shields
- CM, CMP, CMR (75°C or higher)
- UL type
- FT4, FT6 (75°C or higher)
- CSA type
- Ethernet Patch Cable.
- 2 or 4 Unshielded Twisted Pair (UTP)
- Cable configuration
- 24 AWG (stranded)
- Gauge
- Category 5e or better
- IEEE 802.3
- CM, CMP, CMR (75°C or higher)
- UL type
- FT4, FT6 (75°C or higher)
- CSA type
- Punch Down Block Jumper Cable.
- 1 Unshielded Twisted Pair (UTP), no jacket
- Cable configuration
- 24 AWG (solid)
- Gauge
- Category 5e or better
- IEEE 802.3
- CM, CMP, CMR (75°C or higher)
- UL type
- FT4, FT6 (75°C or higher)
- CSA type
- LON Networking Wiring.
- Unshielded or shielded pair
- Cable configuration
- 22 AWG (stranded)
- Gauge
- 17 pf/foot @ 1 KHz, 1 MHz
- Capacitance
- CM, CMP, CMR (75°C or higher)
- UL type
- FT4, FT6 (75°C or higher)
- CSA type
- TX-I/O Island Bus Wiring.1)
- 1 Twisted Shielded Pair (TSP) + 1 Twisted Shielded 3C (Triad)
- Cable configuration
- -or- 1 Twisted Shielded 4C
- -or- 2 Twisted Pair (TP)
- 14 or 16 AWG (stranded)
- Gauge
- 54 pf/ft or less
- Capacitance
- 3 to 4
- Twists per foot
- 100% foil with drain wire (except TP)
- Shields
- UL listed, CM, CMP (75°C or higher)
- NEC class
- FT4, FT6 (75°C or higher)
- CEC class
- See TX-I/O Island Bus Guidelines [➙ 97] in Chapter 3 for cable configuration.
- KNX/PL-Link Signal and Power Cable.
- 1 Twisted Shielded Pair (1 TSP)
- Cable configuration
- No. 18 to 20 AWG (solid BC)
- Gauge
- 32pf/ft, (70pf/ft 18 AWG)
- Capacitance
- 3 to 4
- Twists per foot
- 100% foil with drain wire (do not connect drain wire to earth ground).
- Shields
- UL listed, CMP (300 Vac, 75°C or higher)
- NEC class
- FT6, (300 Vac, 75°C or higher)
- CEC class
- Chapter 2 – Network Electrical Systems
- Dual Port Ethernet Controller Topology Basics
- Ethernet Communications Wiring
- RS-485 MS/TP Communications
- Using Cimetrics Routers on an APOGEE BACnet MS/TP Network
- Network Wiring Requirements Decision Tree
- 3-Wire Interface Nodes
- 1.5-Pair Network Cable
- Network Loading
- 3-Wire Devices on a 2-Wire or 3-Wire Network Master Controller/Higher Level Controller
- Network Repeater for 3-Wire Networks
- 3-Wire Network Terminator (550-975P100, Pkg. of 100)
- 3-Wire Network RS-485 Reference Terminator (550-974P10 Pkg. of 10)
- BACnet Nodes on Siemens Controllers or Third-Party Equipment (Using 1.5 pr cable)
- RS-485 ALN (P2/P3) and FLN (P1) Trunk Communications Wiring
- RS-485 ALN and FLN (P1) Communications Wiring on Structured Cabling
- LONWORKS FLN Communications Wiring
- Power Trunk Guidelines
- Chapter 2 discusses the following topics:
- ● Dual Port Ethernet Controller Topology Basics [➙ 30]
- ● Ethernet Communications Wiring [➙ 33]
- ● RS-485 MS/TP Communications [➙ 36]
- ● RS-485 ALN (P2/P3) and FLN (P1) Trunk Communications Wiring [➙ 49]
- ● RS-485 ALN and FLN (P1) Communications Wiring on Structured Cabling [➙ 56]
- ● LONWORKS FLN Communications Wiring [➙ 62]
- ● Power Trunk Guidelines [➙ 67]
- The most important aspect of dual port Ethernet controller topology is that it meets the requirements of the application with regard to fault tolerance.
- ● Fault Tolerant Loop (Ring) Topology with Spanning Tree Protocol (STP)
- ● Issues with Non-Fault Tolerant Line (Chain) Topology
- ● Fault Tolerant Loop (Ring) Topology with Rapid Spanning Tree Protocol (RSTP)
- ● Fault Tolerant Star (Home Run) Topology
- /
- Fig. 3: Dual Ethernet Connection Using Up to 90m Solid Copper Cable and Jack Boxes.
- /
- Fig. 4: Dual Ethernet Connection Using Up to 30m Stranded Copper Patch Cables.
- Requirements for Fault Tolerant Loop Topology with STP
- ● Controllers include embedded 3 port switch supporting STP and one IP Address
- ● Loop of up to 8 controllers installed in a line configuration with maximum cable distance of 810 m (2655 ft) consisting of 9 × 90 m (295 ft) runs between RJ45 jacks
- ● Managed Ethernet switches with STP support complete the loop configuration providing active 10/100BaseTX switch ports at each end of the controller line
- ● Forwarding is enabled on switch port connected to first controller upstream port 1
- ● Forwarding is disabled (blocking) on switch port connected to the last controller downstream port 2 to prevent loop from creating communication storm
- ● Controller fault such as power loss, malfunction or disconnect from the RJ45 jacks causes blocking switch port to changes state to forwarding so that downstream controllers are reconnected
- ● Controller fault correction causes downstream switch to resume blocking
- ● Network management using Internet Group Management Protocol (IGMP) allows alarming as otherwise, a line failure by the customer remains unknown
- ● Multiple STP loops may be installed in parallel as long as no two loops exceed 17 controllers
- ● No third-party devices or other switches will be installed in the loop
- /
- Fig. 5: Wiring Diagram one Line of up to 8 Dual Port Ethernet Controllers within a STP Loop Configuration (fault tolerant).
- Issues with Non-Fault Tolerant Line Topology
- ● Controller fault such as power loss, malfunction or disconnect from the RJ45 jacks causes all downstream controllers to lose connectivity until fault is corrected
- ● No network management for alarming a line failure so the fault location and status remains unknown by Customer
- /
- Fig. 6: Wiring Diagram one Line of Dual Port Ethernet Controllers (not fault tolerant downstream will lose connectivity).
- Requirements for Fault Tolerant Loop Topology with RSTP
- ● Ethernet Bridges and Managed switches with support for RSTP.
- ● RSTP is interoperable with dual port Ethernet controllers which include embedded 3 port switch supporting STP and one IP Address
- ● RSTP allows larger loops of up to 20 controllers installed in a line configuration with maximum cable distance of 1890 m (6200 ft) consisting of 21 x 90 m (295 ft) runs between RJ45 jacks
- ● RSTP allows faster 10-30 second network fault recovery using discarding port
- ● Network management using Internet Group Management Protocol (IGMP) allows alarming as otherwise, a line failure by the customer remains unknown
- ● Multiple STP loops may be installed in parallel in RSTP configuration as long as no two loops exceed 40 controllers
- ● No third-party devices or other switches will be installed in the loop (BPDU messages must be transmitted transparently to the management switch)
- /
- Fig. 7: Logical Diagram multiple Lines of up to 20 Dual Port Ethernet Controllers within a RSTP Configuration (fault tolerant).
- Requirements for Fault Tolerant Star Topology
- ● Ethernet switches must provide one active 10/100BaseTX port for each controller
- ● Maximum cable distance 90m between RJ45 jacks at switch and controller
- ● Switch active port connects to controller upstream port 1
- ● Controller downstream port 2 is not used
- ● Switch ports must be active at time of BACnet/IP commissioning
- ● Controller fault does not impact other controllers
- /
- Fig. 8: Star Topology requires one switch port for each controller.
- Preferred Cable Type
- Standard TIA/EIA 802.3 (IEEE Std 802.3 or ISO/IEC 8802-3) provides background material on the basic functioning of the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) packet network. Wiring guidelines for TIA/EIA 802.3 links are described in ANSI/TIA/EIA-568-B.1, Commercial Building Telecommunications Cabling Standard and ANSI/TIA/EIA-606 Cabling Administration.
- To minimize risk and reduce installed costs of Ethernet communications wiring, use the cables listed in the following table for all estimates and installations.
- Preferred Cable Type.
- Jacks and Patch Panels
- Patch Cable*
- Basic Link *
- Connection Requirements
- Equipment
- IEEE 802.3 Category 3 certified RJ-45 connectors or better.
- IEEE 802.3 Category 3 certified stranded cable or better.
- IEEE 802.3 Category 3 certified solid cable or better, terminated in the field panel or at the computer with a standard RJ-45 jack.
- 10Base-T (10 Mbps)
- ● MLN
- ● ALNs:
- – Ethernet
- – BACnet/IP
- IEEE 802.3 Category 5e certified RJ-45 connectors or better.
- IEEE 802.3 Category 5e certified stranded cable or better.
- IEEE 802.3 Category 5e certified solid cable or better, terminated in the field panel or at the computer with a standard RJ-45 jack.
- 100Base-TX (100 Mbps)
- – AEM
- ● Hubs
- ● Switches
- ● Routers
- ● Network Interface Card
- *See Wire Specification Tables [➙ 25] in Chapter 1.
- The Insight server and client workstations operate a Management Level Network (MLN) connected directly to an Ethernet network. The Ethernet type is TCP/IP running at 10Base-T minimum including connections between each switch. See Figure Workstation to Ethernet Wiring.
- /
- Fig. 9: Workstation to Ethernet Wiring.
- The Insight server and client workstations operate a Management Level Network (MLN) connected directly to an Ethernet network. The Ethernet type is TCP/IP running at 10Base-T minimum including connections between each switch. See Figure Workstation to Ethernet Wiring.
- APOGEE Ethernet/IP uses a TCP/IP-based Automation Level Network (ALN) that communicates over a customer Ethernet cabling and IP network to reduce overall system and maintenance costs. Otherwise, system operation is identical to existing RS-485 ALN installations. See the Table Preferred Cable Type [➙ 33] for Ethernet ALN cabling requirements. Wiring from the Ethernet switch to the Insight workstation or BACnet/IP field panel uses the same wiring guides as the MLN. See the section MLN—Workstation to Ethernet Wiring [➙ 34] in this chapter.
- The BACnet client supports communication with BACnet devices over Ethernet or TCP/UDP.
- Wiring from the Ethernet switch to the CT workstation or BACnet/IP field panel uses the same wiring guides as the MLN. See the section MLN—Workstation to Ethernet Wiring [➙ 34] in this chapter. Cabling requirements are the same as for Ethernet ALN devices; see the Table Preferred Cable Type [➙ 33].
- The APOGEE Ethernet Microserver (AEM) allows a single field panel to be connected directly to an Ethernet network. This AEM field panel may host an RS-485 up to a maximum of 99 RS-485 field panels. See the following figure for an example of an AEM layout.
- /
- Fig. 10: Workstation to Ethernet Wiring Using an AEM.
- The AEM uses the TCP/IP communications protocol and connects to Ethernet via a 100Base-TS or 10Base-T half duplex switch or switch port and to the APOGEE field panel using the RS-232 modem port. The AEM can auto-connect to 10Base-T or 100Base-TX half duplex switch port (switch speed should be fixed).
- NOTE: Actual communication speed of hosted RS-485 ALN is 38400 bps so it is recommended to keep the number of hosted field panels to 40 and to monitor resident BATT point to ensure fastest recovery after power loss.
- CAUTION
- Configure IP addresses or DHCP names before plugging the AEM into the 10Base-T or 100Base-TX connector.
- Existing Category 3 Ethernet wiring may be used, but connection is limited to 10Base-T. Category 5e or better cables (basic link, L1, L2, L3), jacks, and patch panels allow 100BaseTX operation with appropriate network equipment and are recommended for new installations. The solid copper basic link must be pulled into the field panel and terminated with an RJ-45 jack and connected to the AEM with an L1 patch cable. All wiring and connections should be certified Category 5e or better by the vendor.
- Inter-node protocol communications on P1, P2 and BACnet MS/TP networks take place over RS-485 physical media.
- ● This media is defined as a 2-wire half-duplex, differential multipoint serial connection.
- ● The EIA standard also specifies a third wire interconnection.
- – This third wire connection is important to maintaining signal integrity in systems encompassing large networks in electrically noisy environments.
- – In some cases, the third wire reference is earth ground. In other cases, an actual third reference wire is run between all nodes.
- Isolation may also be provided between the controller main electronics (earth referenced side) and the network. Interoperability between nodes with different grounding schemes and isolated versus non-isolated can be maintained by using guidelines discussed in this section.
- Operating in Electrically Noisy Environments
- Non-isolated network interfaces that are referenced to earth at each node are much more susceptible to noise due to differences in the earth ground potential. Large equipment often injects noise into the earth grounding system when starting, stopping, or changing speeds. (VFDs, with their carrier frequencies of 3 to 10 KHz and high harmonics, are right in the RS-485 communications baud rate band.)
- /
- Fig. 11: PWM Waveform Phase A to B.
- Local surges from lighting and power grid switching cause more noise. If this noise is over the common mode voltage acceptable by the RS-485 interface circuits, it causes interruptions in communications.
- 3-wire RS-485 Network Interfaces
- In order to provide higher noise immunity and high data reliability, the network interfaces for Siemens Industry RS-485 interfaces now provide the RS-485 common reference signal in the network interface connector. Older 2-wire interfaces provided the +/- signal lines and Earth (or in some cases just a convenient tie point (FLN devices)). By providing the RS-485 circuit common reference signal, all 3-wire nodes wired using a new 1.5-pair shielded cable are referenced together.
- The older 2-wire circuit uses a capacitive connection to earth as the reference, which is more susceptible to earth ground noise. 2-wire connections are still supported per the Network Wiring Requirements Decision Tree, but 3-wire connections are highly recommended, especially for all new interfaces that provide a true 3-wire connection.
- The use of 1-pair or 1.5-pair cabling is not a requirement of the RS-485 protocol. It is a result of the electrical interface, which was changed starting with the PXC Compact, PXC Modular, and P1-BIM.
- NOTECimetrics routers may only be used for non-smoke control applications.
- Although Cimetrics BACnet routers are not the preferred solution, they may be used on an APOGEE BACnet MS/TP network. In order for Cimetrics routers to work properly, they must be wired as shown in the following illustration.
- ● Only one router is allowed per isolated network section and it must be an end device.
- – Limiting each isolated network section to one router and using 1.5-pair cable with the reference connection near the router minimizes the voltage difference between the two ground references.
- – The limitation of one router per network section is due to the type of environment in which the controllers are normally installed. Very few APOGEE network installations can be considered electrically quiet. For example, a small-sized office environment may be electrically quiet.
- ● The Cimetrics router’s RS-485 circuitry is not earth grounded unless the paint on the chassis is removed and the chassis is then connected to earth.
- – In addition, an internal “Z” jumper must be removed to help ensure that the RS-485 circuit is isolated from earth.
- – In order to keep the Cimetrics router an isolated device, do not tie the chassis to earth.
- ● If Polycool devices are used on the network, do not enable the line termination feature.
- ● 1.5-pair cable is highly recommended. Using 1 TSP cable reduces noise immunity.
- ● The following must be done if single-pair cable is used:
- – The network must be terminated with 120 ohm resistors (550-975P100).
- – Do not tie the shield to the third terminal on the network plug. Instead, use a wire-nut to bypass the shield and make a continuous shield connection as shown in the following figure.
- /
- Fig. 12: Using Cimetrics Routers on an APOGEE BACnet MS/TP Network.
- /
- Fig. 13: Network Wiring Requirements Decision Tree.
- NOTE:The wiring method for devices with a 3-wire interface is the same whether they are on a BACnet ALN or FLN.
- The following table outlines the Siemens Industry devices that were re-released with 3-wire RS-485 network interfaces.
- 3-Wire RS-485 Network Interface Terminal Wiring (Using 1.5-Twisted Shielded Pair Cable).
- Network Electrical Loading1)
- Terminal for 2-Wire4)
- Terminal Usage3)
- Network Protocol2)
- Product Name
- 1/8
- ---
- BACnet MS/TP
- DXR2.M
- /- +
- 1/8
- E
- /- +
- BACnet MS/TP
- BACnet Actuator (550-430, 550-431)
- 1/8
- E
- BACnet MS/TP
- BACnet Short Platform (550-432, 550-433)
- /- +
- 1/8
- E
- /- +
- BACnet MS/TP
- BACnet Long Platform (Updated Version) (550-490, 550-491, and 550-492)
- 1/8
- --
- BACnet MS/TP
- MSTP-BIM (TXB3.M)
- /- +
- 1/8
- /- +
- ALN/FLN (P2, P1, MS/TP)
- PXC Compact
- 1/8
- S - +
- ALN/FLN (P2, P1, MS/TP)
- PXC Modular
- 1/8
- ---
- S - +
- FLN (P1)
- P1-BIM (TXB1.P1, TXB1.P1-4)
- RS-485 spec allows for 32 electrical loads on a section of network cabling (a network repeater allows for more devices). Electrically 32 full loads (factor 1) have same resistance as 256 x 1/8 load devices.
- RS-485 communication traffic and speed will limit number of MSTP devices per ALN/FLN, refer to BACnet Application Guide. Typical limit is 10 devices for MSTP ALN while limit is 50 devices per MSTP FLN at 76800 bps.
- RS-485 network common may be marked with S, but functions as /.
- Terminal must be connected to earth ground for compatibility with 2-wire (1-Twisted Shielded Pair) cable.
- The network cable recommended for use with the 3-wire (isolated RS-485 common) is a single pair cable with third wire (1.5-pair) that is used to tie the RS-485 reference (communication common) of all the nodes on the network together.
- All the Siemens Industry products listed in the Table 3-Wire RS-485 Network Interface Terminal Wiring (Using 1.5-Pair Cable) use the 3-wire interface.
- ● By providing the RS-485 ground signal of the interface to the network termination plug, all node communication ports can be referenced together providing a high degree of noise immunity.
- ● The RS-485 common reference wire is terminated at one point (and only one point) to earth ground.
- ● An overall foil shield and drain wire provide additional noise protection.
- The 1.5-pair cables can be found in the Field Purchasing Guide, section 14-01 (http://iknow.us009.siemens.net/fpg/sec14-01/default.asp). See the following table.
- ● Contact the cable supplier listed in the Field Purchasing Guide for availability. Some cable may be special order if it has never been stocked.
- ● The decision to use the orange jacket cable or orange jacket with blue stripe cable is up to the user/customer. The only difference in the cables is the addition of the blue stripe, which can be useful to indicate a different protocol usage.
- Recommended 1.5-Pair Cable Types.
- Use
- Description
- Plenum Rating
- Cable type
- FLN
- orange jacket with blue stripe
- plenum
- 1.5-pair
- FLN
- orange jacket with blue stripe
- non-plenum
- 1.5-pair
- ALN
- orange jacket
- plenum
- 1.5-pair
- ALN
- orange jacket
- non-plenum
- 1.5-pair
- In all cases, cable impedance is 120 ohms.
- 1.5-pair cable is highly recommended for installation in electrically noisy environments, such as near VFDs, large inductive loads, high voltage circuits greater 480 Vac, and any time the network is expected to cross a building earth ground differential (between two connected buildings that may have slightly different earth ground potentials). See the Network Wiring Requirements Decision Tree [➙ 39] for recommended cable usage.
- ● For any new installation, the choice of cable should be made for the entire network.
- ● It is not acceptable to switch back-and-forth between 1-pair and 1.5-pair cable.
- ● The use of the shield as the third wire is prohibited.
- ● When using a 1-pair cable on devices with the 3-wire interface, the shield should be daisy-chained through the controller and not connected to the "S" pin or /. The shield bypasses the controller using wire nuts to continue the shield.
- 1.5-pair Cable Specifications.
- Twisted Pair
- 24 AWG (stranded)
- ● Gauge
- 12.5 picofarad/foot (conductor to conductor)24 picofarad/foot (conductor to shield)
- ● Capacitance
- 4
- ● Twists per foot
- 24 AWG stranded, 3 inch lay with twisted pair
- Reference Wire
- 100% overall foil
- Shield
- /
- Fig. 14: Figure. 1.5-pair Cable.
- The RS-485 specification allows 32 full load devices on a section of network cable before a repeater is required. Most Siemens BACnet nodes are 1/8 load devices, so, in theory, you could place 256 on a network section. Response times normally limit the maximum number of devices on a network to lower values of around 96 devices.
- The PXC Modular, PXC-36, and P1 BIM have 1/4 or 1/8 load interfaces, which would allow for a maximum of 128 devices on a network section. These limits are strictly electrical load limits, please check the network manager/next higher controller specs for limits on the total number of addressable nodes on a network.
- The network distance for a fully or partially loaded network is 4000 feet (1220 meters) at a maximum network speed of 76.8K bps. Lower speeds do not mean longer network sections are possible. The maximum network section is 4000 feet. Network repeaters can be used to extend this distance.
- To determine how many devices can be on a network section, add up all the loading numbers and do not exceed 32. Many third-party devices have full load interfaces. Check the manufacturer’s literature for network loading information.
- Network Cable Sharing and Distances from Higher Power Cables.
- Network cable installed environment
- Never run network cabling closer than 5 feet to a Variable Frequency or Variable Speed Drive except at the point where the network must connect to the VFD/VSD. Network entry into a VFD must be through separate conduit and all network wiring must be kept as far as possible for high power cabling in the drive.
- Never run network cable closer than 5 feet from circuits carrying 100KVa or greater. Always cross high power cables (at a distance of 5 feet) at a 90 degree angle.
- Network run in open cable trays with circuits carrying over 20 amps should be no closer than 26 inches to the higher power cables
- Network run in enclosed trays with circuits carrying over 20 amps should be no closer than 18 inches to the higher power cables.
- /
- Fig. 15: 3-Wire (1.5 pair) Network Wiring Detail.
- /
- Fig. 16: 3-Wire Nodes wired using 1 Pair Cable.
- NOTE:When replacing nodes that use a 3-wire interface on existing 2-wire networks, use the following wiring method.
- /
- Fig. 17: Replacing a 2-Wire Node with a 3-Wire Node.
- When placing nodes on a network repeater, (capable of supporting 3-wire networks), use the following sample connection methods. An RS-485 repeater that supports 3-wire interface cabling methods can be purchased from Black Box, (Model ICD107A along with 12Vdc power source (PSD100). This repeater is fully optically isolated. This repeater is recommended whenever cable is run between two buildings or sections of building supplied from separate power sources. Black Box can be found in the Field Purchasing Guide section 16-05 (http://iknow.us009.siemens.net/fpg/sec16-05/default.asp).
- ● Network traffic is only allowed to go through two repeaters in series.
- ● Baud rate and mode switches must be setup to conform to network speed and half duplex 2-wire (vs. 4-wire) operation
- The following figures depict several scenarios for network repeater usage.
- /
- Fig. 18: Intra-Building Repeater.
- /
- Fig. 19: Intra-Building Repeater or Mixed 1pr & 1.5Pr Cable.
- The 3-wire network requires a new network terminator. The new terminator is a 120 ohm 1/2W carbon composition resistor. One terminator must be placed at each end of the 3-wire network section.
- The nodes that use a 3-wire network interface must have the RS-485 reference wire (yellow) of the network cable terminated to EARTH GROUND at ONE END ONLY through an RS-485 reference terminator (shown below). The RS-485 reference terminator consists of a PTC thermistor (polyfuse device) and wire to allow connection to earth ground. A PTC was chosen in case the third wire of the network cable, (the common reference between all 3-wire nodes), is accidentally grounded to earth ground at a second location that could cause high ground currents to flow, due to a difference in earth ground potential. The PTC would open during the short condition if large currents start to flow in the reference wire. Without the PTC or 100 ohm resistor, sufficient current could flow to damage the cable. The PTC will return to normal resistance (less than 1 ohm) when the fault condition is removed.
- Before the RS-485 reference terminator is installed, the third wire (yellow) must be tested with a DMM to insure it is not already connected to earth ground. If the wire is connected to earth ground the fault condition must be remedied before terminating the wire using the RS-485 reference terminator.
- /
- Fig. 20: Network RS-485 Reference Terminator.
- Not all Siemens Building Technologies provide a 3-wire MS/TP network interface. In order to connect to a 3-wire network use the following diagram as a guide. This guide may also be used when connecting to third-party controllers that support a 2-wire interface. If the Master node supports a 3-wire network, then wire the network in the same manner as the BACnet slaves. The RS-485 common must be referenced to earth ground through the RS-485 reference terminator (550-974P10) at one end of the network, (master end preferred).
- Depending on the manufacturer, the third wire on 3-wire network interfaces has several names (for example: Ref, Ground, Com. SC (Signal Common), R (for Reference), GND, SG (Signal Ground)).
- SBT chose the General Ground symbol (/) as the international symbol for Equipotential Point versus protective/earth ground or noiseless ground. Some early BACnet controllers may be marked with the earth symbol (/) or the S designation. This pin is not the termination point for the shield of the communications cable.
- NOTE:The symbol (/), is the symbol being used to represent RS-485 communications common reference.Early versions of some controllers may show the earth ground symbol (/) or the "S" designation.
- /
- Fig. 21: BACnet Nodes on Siemens Controllers or Third-Party Equipment.
- The BACnet FLN supports communication for BACnet devices over 2-wire RS-485 trunks.
- Wiring from the field panel FLN port to the BACnet device uses the same wiring guidelines as the RS-485 FLN (P1) trunk. See the Table 1.5-pair Cable Specifications [➙ 42].
- See the section RS-485 MS/TP Communications [➙ 36] for connecting 3-wire RS-485 trunks.
- The following table provides the maximum wiring distances per 2-wire RS-485 trunk section. At bit rates over 9600 bps, no stubs or tees are permitted in the trunk cabling. A Trunk Terminator is required at each end of the trunk section at speeds over 9600 bps. See Figure Multi-Drop Trunk Terminator [➙ 53].
- Distance per 2-wire Trunk Section. 1,2(Using Recommended Cabling—Based on Cable Wire to Wire Capacitance.)
- Speed and Maximum Distance
- N/A
- 4,000 ft(1219 m)
- 18 AWG
- 10,000 ft(3048 m)
- 18 AWG
- ALN Trunk
- 4,000 ft(1219 m)
- 20 AWG
- 4,000 ft(1219 m)
- 20 AWG
- ALN Trunk
- 3,280 ft(1 km)
- 24 AWG (Low Cap)
- 4,000 ft(1219 m)
- 24 AWG (Low Cap)
- 4,000 ft(1219 m)
- 24 AWG
- 4,000 ft(1219 m)
- 24 AWG
- ALN Trunk
- N/A
- 5,000 ft(1524 m)
- 18 AWG
- FLN Trunk
- 4,000 ft(1219 m)
- 20 AWG
- FLN Trunk
- 3,280 ft(1 km)
- 24 AWG (Low Cap)
- 4,000 ft(1219 m)
- 24 AWG (Low Cap)
- 4,000 ft(1219 m)
- 24 AWG
- 4,000 ft(1219 m)
- 24 AWG
- FLN Trunk3
- A trunk section is referenced as a length of cable that is electrically isolated from another cable. Electrical isolation is obtained with network devices such as HSTIEs, TI2s, and Fiber Optic TIs.
- The maximum amount of cable per logical trunk may be extended beyond the maximum physical trunk segments limits shown in this table via network devices, such as the HSTIE or TIE, that function as Trunk Extenders. See HSTIE Usage in this chapter for more information.
- Reduce the FLN trunk length by 20 feet (6 m) for every BACnet TEC on the FLN above 150 devices.
- NOTE:ALN trunk terminal "S" is grounded or connected to the field panel case. It is used only to provide a shield connection for the ALN trunk cable. NEC Article 800 does not allow a communication cable to provide a ground path between equipment chassis. The Figure RS-485 ALN Trunk Shield Connection shows how the ALN trunk shield is connected to only one field panel marked "OUT" and is tied back at the field panel marked "IN".
- /
- Fig. 22: RS-485 ALN Trunk Shield Connection.
- 1. The “S” pin of the PXC-C and PXC-M must be left open, see NOTE.
- 2. The “E” pin of the MEC and the / pin of the PXC Compact and PXC Modular must be tied to earth ground.
- 3. The “S” pin of the MEC, MBC, SCU, and FLNC is earth grounded so the shield conductor can be connected there.
- NOTE:The equipotential symbol (/), is the symbol being used to represent RS-485 communications common reference.Early versions of some 3-Wire controllers (PXC Compact, PXC Modular, P1-BIM, Long Platform BACnet TECs and BACnet Equipment Controllers) may show the earth ground symbol (/) or the "S" designation.
- NOTE:The symbol (/), is the symbol being used to represent RS-485 communications common reference.Early versions of some controllers may show the earth ground symbol (/) or the "S" designation.
- FLN trunk terminal "S" is not grounded or connected to the equipment controller case. It is used only to tie shields together. The Figure FLN P1 Trunk Connection to TEC—Electronic Output shows how the FLN trunk is connected to electronic output Terminal Equipment Controllers.
- /
- Fig. 23: RS-485 FLN (P1) Trunk Shield Connection—Electronic Output.
- Field Panel Notes (FP begins shield earth ground)
- *
- MBC, SCU & FLNC: connect shield to FLN “S” pin; earth ground is internally connected.
- MEC: connect “E” pin to enclosure earth ground or Service Box “E” pin and connect shield to FLN “S” pin.
- PXC-M & PXC-C: connect (/) and shield to enclosure earth ground and leave FLN “S” pin unconnected.
- When FLN Speed is set greater than 4800 bps use Trunk Terminator (538-664) at both ends of trunk wire. .FLN Device Notes (shield is continuous from FP or tied back and earth ground restarted; if present connect Earth Ground).
- TEC/ATEC: tie both shields to “S” pin and if required connect transformer neutral to earth ground; do not earth ground “N” pin.
- N-VARIANT TEC/ATEC: tie both shields together and do not connect to controller leaving / unconnected. Connect transformer neutral to earth ground; if needed earth ground “E” pin to provide highest noise immunity.
- UC: **bypass “S” pin or restart shield on “S” pin; connect “E” pin to enclosure earth ground.
- DPU: tie both shields to “S” pin; earth ground is internally connected.
- P1-BIM: leave “S” pin open - **bypass or restart shield on enclosure earth ground; connect (peg sym) to enclosure earth ground.
- MPU: **bypass “S” pin or restart shield on “S” pin; connect “G” pin to enclosure earth ground.
- PXM: **bypass “S” pin or restart shield on “S” pin; connect “E” pin to enclosure earth ground.
- PPM: leave “S” pin open - **bypass or restart shield on enclosure earth ground; connect (peg sym) to enclosure earth ground.
- P1-PXC: leave “S” pin open - **bypass or restart shield on enclosure earth ground; connect (peg sym) to enclosure earth ground.
- See Grounding [➙ 16], National Electric Code (NEC) Communications Requirements [➙ 18], and Controlling Transients [➙ 24], in Chapter 1 for definitions of NEC Articles and Local Building Ground.
- CAUTION
- Buildings with unbonded electrical services should be considered separate buildings for communications purposes. All field panel, equipment controller, and network devices on one service should be isolated from those on another service. Failure to isolate will result in loss of communication.
- All RS-485 ALN and FLN (P1) trunks must share the same electrical service and single building ground point. Wherever the electrical services are not bonded, as described in NEC Article 250 or by local authorities, appropriate network devices such as the HSTIE, Fiber Optic Trunk Interface or the Trunk Interface II should be used.
- Only one side of the network device should be grounded to the single building ground point. Network devices plugged into the field panel may be grounded to the field panel chassis as shown in the Installation Instructions. The third wire (green or green/yellow) from the field panel enclosure is tied to the single building ground point. Either all RS-485 FLN (P1) equipment controller power trunk neutrals must be tied to the single building ground point or network isolation devices must be used.
- The Multi-Drop Trunk Terminator (P/N 538-664) consists of a 120-ohm resistor in series with two opposing polarity diodes placed in parallel. See Figure Multi-Drop Trunk Terminator.
- The Multi-Drop Trunk Terminator is required at each end of a 19.2K bps ALN or FLN (P1) trunk segment. See Figure ALN Trunk Terminator Requirements.
- CAUTION
- No more than two trunk terminators should be used on a single trunk segment. Using more than two can cause unpredictable results.
- NOTE:While Trunk Terminators are required only on RS-485 ALN or FLN trunks running over 19.2K bps, due to accumulated cable distortion, Trunk Terminators are recommended on any RS-485 ALN or FLN trunk at 9600 bps if old style TIEs are installed (silver enclosures) or if the trunks are over 4000 ft (1219 m) in total length.
- /
- Fig. 24: Multi-Drop Trunk Terminator.
- NOTE:Trunk terminators are internal switch settings inside the HSTIE (or TIE).The Figure ALN Trunk Terminator Requirements shows three logical trunk segments and three sets of trunk terminators.
- /
- Fig. 25: ALN Trunk Terminator Requirements.
- To minimize risk and reduce installed costs, use only the network devices listed in the following table on RS-485 ALN and FLN trunks. The following table lists the power source requirements for each network device.
- See each product section in this manual for specific device power source requirements.
- Power Source Requirements for 2-wire RS-485 devices.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 6 VA
- 50/60 Hz
- 115/230 Vac
- HSTIE
- 6 VA
- 50/60 Hz
- 115/230 Vac
- Trunk Interface II
- 6 VA
- 50/60 Hz
- 115/230 Vac
- Fiber Optic Trunk Interface
- 10 VA
- 50/60 Hz
- 115/230 Vac
- Fiber Optic Hub
- The High Speed Trunk Isolator/Extender (HSTIE) is used to protect, isolate, extend (re-time) an RS-485 ALN or FLN trunk. Only the HSTIE can extend the maximum wire length of a trunk segment. Other devices such as Trunk Interfaces with leased line modems or fiber optics do not increase the maximum wire length of a trunk segment.
- /
- Fig. 26: Connections to HSTIE.
- HSTIE Usage
- The number of High Speed Trunk Isolator Extenders (HSTIEs) on a logical RS-485 ALN or a logical FLN trunk is directly related to the total trunk length, type of trunk wire used, and the time delay allowed by the network protocol. Trunk cabling causes bit distortion that limits the total trunk length to the distances listed in table Distance per 2-wire Trunk Section.
- Since the HSTIE re-times the packet bytes, the maximum amount of trunk a network can support has increased. The HSTIE introduces a delay limiting the number that can be used in series. Do not exceed the HSTIE usage limits shown in table Speed vs. Maximum Number of HSTIEs in Series.
- Speed vs. Maximum Number of HSTIEs in Series.
- Speed
- 6
- 6
- 10
- ALN only
- 6
- 6
- N/A
- FLN only
- NOTE:The Insight Server and Client, APOGEE Ethernet Microserver (AEM), and other field panels operating Ethernet protocols do not use the chained patch cables referred to in this section. These devices must be plugged into an operational TCP/IP network using standard Ethernet patch cables.
- The Structured Cable System (SCS) is installed per industry standards in a star distribution topology. This does not comply with the RS-485 wiring system used for HVAC or most other building automation systems (BAS). Special patch cables or punch down cables at each end of a wiring segment are used to convert the star topology to multi-drop trunk topology. The wiring segments and patch cables are individually certified. Once plugged in, the wiring segments and patch cables must be certified as an ALN or FLN.
- CAUTION
- Unplugging a patch cable from a structured cabling system will split the multi-drop trunk and disconnect part of the RS-485 ALN or FLN (P1) from the BAS.
- Shielded Category 5 cabling is used where excessive noise is expected on the information system cabling, for example, when it is near a high-power transmitter. In these cases, the same shielded Category 5 cable will be used for the RS-485 ALN and FLN trunks.
- CAUTION
- Use an HSTIE to isolate different wire types, such as shielded zone trunk cabling and SCS UTP.
- Mixing wire types will result in loss of signal integrity and possible loss of RS-485 ALN or FLN communications.
- ● Use separate binder groups (a group of 4 or 25 cable pair cables in same sheath) for building automation system signals. Use blue binder group for HVAC.
- ● A riser cable may have many 25 pair binder groups. Building automation system signals and voice and data signals can share the same riser cable, but not the same binder group.
- ● Horizontal binder groups can have either 25 cable pairs or 4 cable pairs. Building automation system signals and voice and data signals can share the same cable tray, but not the same binder group.
- ● Use a 4-pair (blue) binder for each separate ALN.
- ● Use a separate 4-pair (blue) binder for FLN1, FLN2, and FLN3 on each Field Panel Controller. These FLN signals are multiplexed and may share the same binder. Do not mix with FLN signals from other controllers.
- CAUTION
- MLN, AEM ALN, and other Ethernet protocol signals do not use the same interconnects and must not share the same binder group as RS-485 ALN or FLN signals. Mixing Ethernet protocol signals within the same binder group will result in loss of signal integrity and possible loss of RS-485 ALN or FLN communications.
- /
- Fig. 27: Components of an SCS 4 UTP Cable.
- The Telecommunications (wiring) Closet-to-riser interface will generally be Category 5 riser cable on new installations. Following information systems standards, basic link cable runs are limited to 600 ft (190 m) of solid copper terminated by punch down blocks in the main and intermediate wiring closets.
- SCS segments are wired per TIA 568A (preferred) or 568B. Observing the 600 ft (190 m) restriction allows future conversion to Ethernet devices in the field panel without rewiring the SCS segment. See the following table for RS-485 ALN and FLN pinout. The Figure Punching Down the Riser Cabling for an RS-485 ALN or FLN shows incoming cable punch down in an intermediate wiring closet from a main wiring closet.
- Wiring Procedure for ALN and FLN (P1) on Structured Cabling.
- RJ45 TIA568A (Preferred)
- Signal Path
- Conductor Pair Color
- Device Connection
- Wiring Block Position
- 5
- Outgoing RS-485 ALN or FLN
- White-Blue
- +
- 1
- 4
- Blue
- –
- 2
- 3
- Incoming RS-485 ALN or FLN
- White-Orange
- +
- 3
- 6
- Orange
- –
- 4
- 1
- Second outgoing signal pair or initiating device (contact closure)
- White-Green
- Not used
- 5
- 2
- Green
- Not used
- 6
- 7
- Second incoming signal pair or indication device (4-20 mA)
- White-Brown
- Not used
- 7
- 8
- Brown
- Not used
- 8
- /
- Fig. 28: Punching Down the Riser Cabling for an RS-485 ALN or FLN.
- The Telecommunications (wiring) Closet-to-device outlet will generally be Commercial Category 5E or IEEE Category 6 cable on new installations. Following information systems standards, basic link cable runs are limited to 295 ft (90 m) of solid copper terminated by punch down blocks in the wiring closet and RJ-45 jacks in the field panel or zone.
- SCS segments are wired per TIA 568A (preferred) or 568B. Observing the 295 ft (90 m) restriction allows future conversion to Ethernet Devices in the field panel without rewiring the SCS segment.
- /
- Fig. 29: Punching Down a Device.
- /
- Fig. 30: Punching Down the Connecting Blocks to the Wiring Block.
- The following table shows the cross-connect terminations used to create the chained multi-drop RS-485 ALN and FLN communications signal in the wiring closet. Use Note 4a for floor-to-centralized distribution chain (Figure Punching Down CAT5 Cross-Connect Wires to Connecting Blocks) and use Note 4b with a second riser cable for floor-to-floor distribution chain (not shown).
- Punching Down CAT5 Cross-Connect Wires to Connecting Blocks.
- Cross-Connect Terminations
- Description of Riser and Horizontal Cross-Connect Signals
- Note Number
- 3 to 3 (white/blue jumper)4 to 4 (blue jumper)
- Incoming signal to floor (riser cable 1, pair 2) to incoming signal of first device or zone (horizontal cable 1, pair 2)
- 1
- 1 to 3 (white/blue jumper)2 to 4 (blue jumper)
- Outgoing signal (horizontal cable 1, pair 1 to incoming signal of next device or zone (horizontal cable 2, pair 2)
- 2
- 1 to 3 (white/blue jumper)2 to 4 (blue jumper)
- Outgoing signal (horizontal cable 2, pair 1) to incoming signal of next device or zone (horizontal cable 3, pair 2)
- 3
- 1 to 1 (white/blue jumper)2 to 2 (blue jumper)
- Outgoing signal (horizontal cable 3, pair 1) from last device or zone to outgoing signal from floor (riser cable 1, pair 1) back to main distribution
- 4a (See the following figure)
- 1 to 3 (white/blue jumper)2 to 4 (blue jumper)
- Outgoing signal (horizontal cable 3, pair 1) from last device or zone to outgoing signal to next floor (riser cable 2, pair 2) telecommunication closet
- 4b (Not shown)
- /
- Fig. 31: Punching Down CAT5 Cross-Connect Wires to Connecting Blocks.
- Field panels and zones are chained with patch cables.
- ● Figure RS-485 ALN and FLN to RJ-45 Chained Patch Cable, 538-908(S) shows a middle device chain for the field panel or zone.
- ● Figure RS-485 ALN and FLN to RJ-45 Terminated Patch Cable, 538-909(S) shows a terminated chain for the field panel or Zone.
- ● Figure Multiplexed FLN 1, 2, 3 to RJ-45 Terminated Patch Cable, 538-911(S) shows three Zones of FLN (P1) multiplexed from a single Field Panel Controller.
- Shields (S suffix on part number) are used only where shielded cable is brought to the field panel or zone, ensuring impedance is maintained. Terminators are used for all end-of-line connections including both the RS-485 ALN and FLN.
- /
- Fig. 32: RS-485 ALN and FLN to RJ-45 Chained Patch Cable, 538-908(S).
- /
- Fig. 33: RS-485 ALN and FLN to RJ-45 Terminated Patch Cable, 538-909(S).
- /
- Fig. 34: Multiplexed FLN 1, 2, 3 to RJ-45 Terminated Patch Cable, 538-911(S).
- CAUTION
- All field panels should be taken offline and controlled devices placed under manual control prior to changing field panels and network from RS-485 to Ethernet ALN.
- 1. Remove chained patch cables from the field panel ALN port and RJ-45 jack box.
- 2. Install Ethernet controller and RJ-45 patch cable in the field panel.
- 3. Remove all UTP cross-connect wires from punchdown connecting blocks.See Figure 12.
- 4. Install RJ-45 patch panel to the punch-down connecting blocks per TIA 568A or TIA 568B, as required, and install RJ-45 patch cable between the patch panel and the network device.
- NOTE:L model MECs provide a LonWorks® floor level network. Read this section if you are installing an L model MEC. For F model MECs, see the P1 FLN section of this document. Other types of MEC do not provide floor level networks.
- The APOGEE with LonWorks system communicates on a LonWorks compatible Free Topology floor level network (LonWorks FLN). You must observe the limitations of the LonTalk® communication protocol (node count, load count, wire specifications, and wire length limits) when designing the network wiring. Use approved cables only; these include unshielded and shielded (where specified) two conductor 22 AWG Level IV cable. See tables in this section, as well as the Table LONWORKS FLN Wiring Specifications [➙ 63] and Figure LONWORKS Floor Level Network [➙ 63].
- Logical Network Limitations.
- 255
- Maximum number of subnets per network
- 127
- Maximum number of nodes per subnet
- 32,385
- Maximum number of nodes per network
- A system may contain an unlimited number of domains
- A node may be a member of two domains
- A device may contain more than one node
- Physical Network Limitations.
- Limit
- Specification
- 64
- Maximum electrical bus loads per segment
- 1
- Maximum repeater depth
- 2, 105 ohm, wired in parallel
- Network terminators (resistors) per segment
- 78K bps
- Network speeds
- To connect to the LonWorks® network, use 22 AWG twisted pair (TP), level 4, Echelon® approved wire.
- WARNING
- Use the recommended LonWorks® cable: 22 AWG unshielded or shielded (where specified), Level IV per NEMA standards (not equivalent to EIA/TIA Level 4 cable). Network cabling is not polarity sensitive.
- LonWorks FLN Wiring Specifications.
- Max. Node-to-Node Length
- Max. Total Wire Length (1 Segment)
- Wire Type and Gauge
- 1312 ft (400 m)
- 1640 ft (500 m)
- 22 AWG 1 pair, stranded, unshielded, level IV per NEMA standards, blue plenum jacket
- /
- Fig. 35: LonWorks Floor Level Network.
- Any device that contains a Neuron ID (and therefore a unique address) is counted as a node. Devices such as repeaters and network terminators do not have addresses and thus are not counted as nodes.
- The number of electrical LonWorks bus loads allowed per segment is 64. All devices, with the exception of the network terminator, count as one electrical load. Networks with more than 60 nodes should use a repeater. Two-port (P/N 587-450) and three-port (P/N 587-455) repeaters are available.
- A LonWorks FLN consists of 1, 2, or 3 network segments. A segment is defined as a part of the physical network containing nodes that can communicate with each other without requiring intervention from an intermediate device, such as a repeater.
- Use a LonWorks repeater for segments that run between buildings to protect the network against lightning or other high voltage spikes. Additional communication grade surge suppressors should be used as well.
- Repeater depth refers to the number of repeaters that can be connected in series to any given segment. The APOGEE with LonWorks system repeater depth is 1, which means that only one end of a segment can be connected to a repeater. This allows you to extend the channel wire length by either one or two segments, depending on which repeater type you use. Two-port (P/N 587-450) and three-port (P/N 587-455) repeaters are available.
- The LonWorks FLN operates at 78K bps.
- The LON FLN cable can be run in the same conduit or raceway with 24 Vac power and AI, DI, and AO circuits. For more information on conduit sharing, see Conduit Sharing—Class 1/Class 2 Separations [➙ 15] in this document.
- The maximum total wire length per segment is calculated by summing the lengths of all network wire on a segment. The maximum node-to-node length is the maximum distance allowed between adjacent nodes on the same segment. See Figure Determining Network Length—Example.
- Two-port and three-port repeaters can extend the subnet by providing one or two additional segments, with wire lengths as defined in Table LonWorks FLN Wiring Specifications [➙ 63].
- NOTE:Sensor wiring (the wiring from the LTEC to the LTEC room temperature sensor) must be included in the wire length calculations for a segment, because the sensor wiring carries the network signal.
- /
- Fig. 36: Determining Network Length—Example.
- Only approved cables may be used for network wiring. These include unshielded and shielded (where specified) to conductor 22 AWG Level IV cable.
- WARNING
- Use the recommended LonWorks cable: 22 AWG shielded or unshielded, Level IV per NEMA standards (not equivalent to EIA/TIA Level 4 cable). Connect Air brand cable, 22/1 pair, stranded, unshielded, blue plenum jacketed, Level IV, part number W221P-2001, or an approved equal for network wiring.
- Network wiring is NOT polarity sensitive.
- LTEC Controllers use the FTT-10 transceiver that allows free topology wiring. This includesT-taps, stars, branches, loops, as well as standard daisy chain. In all cases, maximum network wire length, including each sensor cable, cannot exceed 1640 feet (500 meters). See Figure LonWorks Network Topology.
- For network lengths that exceed 500 meters (1640 feet), a two-port or three-port repeater can be used (part numbers 587-450 and 587-455, respectively). This will allow three separate network lengths of 500 meters.
- Each network segment (1 without repeater, 3 with repeater) requires a pair of terminating resistors (part number 587-649, packs of 100) wired in parallel anywhere on the segment, at the field panel, or at the repeater. See LonWorks FLN Network Terminations [➙ 67] in this chapter for more information on segment termination.
- /
- Fig. 37: LONWORKS Network Topology
- All LonWorks FLN segments must have a single 52 ohm network termination, made up of two 105 ohm, 1% tolerance, 1/4-watt resistors wired in parallel. These resistors are available in packages of 100 (P/N 587-649P100).
- Install the network terminations as follows:
- ● On a single segment LonWorks FLN, install the termination at the L model MEC.
- ● On a 2 or 3 segment LonWorks FLN, install each segment termination at the repeater.
- A Class 2 circuit, as defined in the National Electrical Code (NEC, operates at less than 30 volts AC (Vac), and is limited to 100 volt-amps (VA) or less. Class 2 circuits are granted special exceptions in the NEC for installation wiring, making it unnecessary to use conduit in most applications.
- There are two types of Class 2 power sources:
- ● Inherently limited
- ● Not inherently limited
- An inherently limited Class 2 power source has some form of current-limiting characteristic designed into the product. Sources of this type are often protected by a current-limiting impedance or embedded fusible link, but other methods are also used. As long as the current limiting is an integral part of the power supply, it will fall into this category.
- NOTE:Because of this built-in current-limiting characteristic, a circuit powered by this type of source needs no further protection to qualify as a Class 2 circuit.
- Inherently limited Class 2 transformers are generally available with ratings up to about 60 VA. They will often be direct plug-in type transformers, similar to those used to power calculators or other small devices. This makes them well suited to applications using a separate transformer for each controller. They can also be used for small power trunk applications, up to the VA rating of the transformer.
- A Class 2 source that is not inherently limited does not have built-in current limiting protection. At the time of installation, a current-limiting device must be installed between the source and the loads. The most common current limiting device for this application is a single fuse or integral transformer circuit breaker, which must be sized so that the power available to the loads does not exceed 100 VA.
- Transformers that are not inherently limited are most commonly used for power trunk applications. Transformers of this type are usually direct wire types, and are available in sizes that permit power trunks up to the full 100 VA allowed. It should be noted that with the additional power capabilities come additional requirements and restrictions at the time of application.
- NOTE:In order to meet NEC Class 2 requirements, using a transformer that is not inherently limited is subject to the following rules:
- ● Each transformer must have a nameplate rating of 100 VA or less.
- ● Unloaded (open circuit) voltage on any circuit cannot exceed 30 Vac.
- ● Each trunk must be limited to 100 VA or less.
- ● For 24V power trunks, each transformer circuit must be protected by a single fuse or integral circuit breaker rated 4 amps or less. This protection is required even if the transformer is rated at 100 VA or less.
- ● A fuse block for the trunk fuses may be required by local code.
- CAUTION
- Always check local codes to determine whether there are differences from the NEC. Specifically, you should determine whether fused circuits are acceptable as Class 2 in your area.
- The following information will help you lay out power trunks for supplying power to multiple controllers.
- Each power trunk will be supplied by a step-down transformer located near a convenient source of line voltage. In general, over-current protection will be required between the step-down transformer and the controllers. See Figures Power Trunk Layout, Class 2 Circuits [➙ 69] and Power Trunk Layout, Class 1 Circuit [➙ 69] and Table Power Trunk Transformer Specification Data [➙ 69] for details.
- Use Class 2 power trunks where possible because they can often be run without conduit. Where conduit is required, Class 2 power trunks can be run in the same conduit with FLN trunks and AI or DI wiring.
- Earth ground point for Class 2 power trunk transformer secondary neutral must be connected back to earth ground for Service using a dedicated ground wire. Service must be same as used for FLN Controller and all other FLN devices.
- ● When using power trunks, any relays, EPs, or contactors must be protected with MOVs at their connection to the trunk.
- ● The fused side of each power trunk must only be connected to terminals labeled +, 24 Vac, or HOT.
- ● Where different services are used, they must be banded per NEC Article 250, or Communication Isolation devices must be used.
- ● Multiple power trunks from the same transformer must be kept in phase. Avoid using different transformers to power the loads and the controllers. If unavoidable, use relay modules to provide isolation for loads connected to different transformers.
- ● If power trunks are connected to UCs, the unfused side of the transformer must be grounded at the transformer and can only be connected to device terminals labeled COMMON or NEUTRAL.
- CAUTION
- Failure to adhere to these polarity conventions can result in equipment damage.
- /
- Fig. 38: Power Trunk Layout, Class 2 Circuits.
- CAUTION
- Circuits connected to transformers rated over 100 VA must be treated as Class 1, that is, in conduit, separate from ALN, FLN, and point wiring.
- When power requirements exceed 100 VA, it is recommended that multiple transformers 100 VA or less be used, rather than a single transformer.
- /
- Fig. 39: Power Trunk Layout, Class 1 Circuit.
- Power Trunk Transformer Specification Data
- 24 Volts Secondary
- Primary Volts: As RequiredSecondary Volts 24 (50/60 Hz) 1
- Fuse Amps 2
- 2.5
- 2.08
- 50
- 3.2
- 3.12
- 75
- 4.0
- 4.16
- 100
- 4.0
- 6.35
- 150 3
- 4.0
- 10.4
- 250 3
- 4.0
- 14.6
- 350 3
- 4.0
- 20.8
- 500 3
- 4.0
- 31.2
- 750 3
- 4.0
- 41.7
- 1000 3
- NEC requires that the Secondary must be grounded if the Primary exceeds 150 volts to ground.
- The fuse for each circuit from a transformer rated greater than 100 VA must be 4.0 amps maximum. The type of fuse required depends on local interpretation of the National Electric Code. Most frequently, transformers with multiple output circuits and multiple fuses are interpreted as Class 1 circuits.
- To comply with NEC Class 2 requirements, each circuit from transformers cannot be greater than 100 VA and transformers cannot exceed 100 VA. Circuits connected to transformers rated over 100 VA must be treated as Class 1 – that is, in conduit, separate from trunk and point wiring. When power requirements exceed 100 VA, it is recommended that multiple transformers 100 VA or less be used, rather than a single transformer. Check local codes to determine whether larger transformers, in combination with fused circuits, can be classified as Class 2 circuits.
- Layout is accomplished by completing the following procedures:
- 1. Determine the VA rating minimum voltage input for each controller.
- 2. Determine the number of power trunks required.
- 3. Determine the wring runs and calculate the voltage at the last controller of each trunk type.
- 4. Select and locate the transformers.
- VA ratings can be found under the heading Power Source Requirements in the chapter that covers each type of controller.
- If future options are to be installed, the VA rating of the affected controllers can be increased. Therefore, if future upgrades will be implemented, include their power consumption in your calculations.
- Example
- VA Required
- Type
- Controller
- 15 VA
- DXR2.M18-101B (Fan Coil Application with Actuator GMA151.1P – 1 DO, 1 Y, 1U)
- C1
- 13.6 VA
- TEC (Dual Duct Controller—1 AVS, Application 35 with Hot Water Heat)
- C2, C3, C4
- 32.75 VA
- 15.0 VA5.0 VA3.75 VA4.0 VA5.0 VA
- Standard UC4 UI @ 1.25 each 3 UO @ 1.25 each2nd I/0 card Keypad display
- C5
- 32.75 VA
- Total
- 27.9 VA
- TEC (Dual Duct Controller—1 AVS, Application 35 with 2-stage Electric Heat)
- C6, C7
- 20.0 VA
- 15.0 VA3.75 VA1.25 VA
- Standard UC3 UI @ 1.25 each 1 UO @ 1.25 each
- C8
- 20.0 VA
- Total
- 19.4 VA
- TEC (Dual Duct Controller—1 AVS, Application 35, with Electric Heat)
- C9, C10
- 19.4 VA
- M12P-102B-GDE (Variable Air Volume with Actuator, Room Automation QMX3.P37)
- C11
- 5.7 VA
- TEC (Constant Volume Controller—Electronic Output, Application 30)
- C12
- /
- Fig. 40: Example Layout.
- Use the following steps to select and locate the transformers.
- 1. Based on the total VA, determine the transformer(s) you will use to supply power to the trunks.
- a For example, if the total VA required for all controllers is 129.3 VA, you could use any combination of inherently limited Class 2 transformers that supply the required power. Or, based on the transformers listed in Table Physical Network Limitations, you could use two 75 VA not inherently limited transformers, each with a field installed 4A fuse. Or, if acceptable to the authority having jurisdiction, use one 150 VA transformer with two 4A fuses. See Figures Power Trunk Layout, Class 2 Circuits [➙ 69] and Power Trunk Layout, Class 1 Circuit [➙ 69] and Table Power Trunk Transformer Specification Data [➙ 69] for details.
- NOTE:All transformers listed in Table Power Trunk Transformer Specification Data [➙ 69] are the “not inherently limited” type. Therefore, you must adhere to the following guidelines to comply with NEC Class 2 requirements.- Each transformer must be limited to 100 VA or less.- Unloaded (open circuit) voltage on any circuit must not exceed 30 Vac.- Each trunk must be limited to 100 VA or less.- For 24V power trunks, each circuit must be protected by fuses rated 4 amps or less.A fuse block for the trunk fuses can be required by local code.
- 2. Determine the minimum number of power trunks needed:
- a Minimum number of trunks = Total VA/100 VA.
- a Depending on your loads and how they are positioned, it may be necessary to use more than the minimum number of trunks.
- 3. Locate the transformers and fuse blocks, with one fuse for each of the trunks at the breaker panel. Connect the line side of all fuses to the secondary of the transformer. One power trunk will be connected to the load side of each fuse.
- Example
- Determine the total VA ratings for all controllers. In this example, the VA required is:
- VA
- 5.7
- =
- VA
- 5.7
- ×
- 1
- 15.0
- =
- VA
- 15.0
- X
- 1
- VA
- 40.8
- =
- VA
- 13.6
- ×
- 3
- VA
- 32.75
- =
- VA
- 32.75
- ×
- 1
- VA
- 55.8
- =
- VA
- 27.9
- ×
- 2
- VA
- 20.0
- =
- VA
- 20.0
- ×
- 1
- VA
- 58.2
- =
- VA
- 19.4
- ×
- 3
- Determine the minimum number of power trunks you will need:
- Minimum number of trunks = 228.25 VA ÷ 100 VA = 2.28
- -
- Since this number is greater than 2, it will be necessary to use a minimum of three power trunks.
- -
- NOTE:This does not imply that transformers totaling 300 VA will be required.
- A wiring run is the distance from the transformer to the end controller in a series. It can be composed of one or more legs. A leg is the distance from the transformer to the first controller, or the distance from one controller to the next controller.
- Figure Wiring Run shows the following:
- ● L1, L2, and L3 are all legs of a wiring run to C3.
- ● L1, L4, and L6 are all legs in a wiring run to C6.
- ● L1, L2, and L5 are all legs in a wiring run to C5.
- /
- Fig. 41: Wiring Run.
- 1. Configure the power trunks so that the total VA rating of all controllers does not exceed 100 VA per trunk.
- 2. Calculate the voltage available at the last controller on each run. Verify that it is greater than the minimum required voltage for the controller.
- NOTE:Different controllers have different power ratings. You may need to calculate the voltage available at the last controller of each type on each wiring run. To calculate these voltages, you must know the following:- The length of each leg of the wiring run.- The VA rating for each controller on the wiring run.- Which devices pull power through each leg.
- 3. Determine how many VA are being drawn through each leg by summing the VA ratings for all controllers pulling power through each leg.
- 4. Determine the voltage drop for each leg:
- a Voltage drop = (total VA)/24V × 0.005 ohms/ft × distance in feet
- a Where: 0.005 is the resistance in ohms/ft for a pair of No. 14 AWG wires.
- NOTE:If a different wire gauge is used, the corresponding resistance must also be used. The values for all approved wire pairs are as follows:- AWG 14 = 0.005 ohms/ft - AWG 16 = 0.008 ohms/ft- AWG 18 = 0.012 ohms/ft- AWG 20 = 0.020 ohms/ft- AWG 22 = 0.033 ohms/ft- AWG 24 = 0.051 ohms/ft (UTP resistance greater than 2C = 0.048 ohms/ft)
- 5. Determine the voltage available at the last controllers:
- Calculate the starting voltage:Starting voltage = transformer voltage × 0.9Where:0.9 is an efficiency factor to account for transformer inefficiencies and lint voltage variations.
- a.
- Calculate the voltage drop to the last controllers:Sum the voltage drops of all legs between the transformer and the last controllerFor example, in Figure Wiring RunVoltage drop to C5 = (Vdrop L1) + (Vdrop L2) + (Vdrop L5)
- b.
- Calculate the voltage at the last controllerStarting voltage – Voltage drop to the last controller(Step 5a minus Step 5b)
- c.
- Check the power source requirements for the DXR2 or PTEC/TEC and verify that your total (the voltage available at the last controller) is greater than the minimum required for that controller type. If your total is not greater than the minimum, the power trunk must be reconfigured.
- d.
- Example
- 1. Configure the power trunks so that the total VA rating of all devices does not exceed 100 VA per trunk. (Many configurations are possible. See Figure Completed Example Layout for the configuration used in this example.)
- – Trunk A: (1 × 5.7) + (3 × 13.6) + (1 × 32.75) = (1 x 15 = 88.55 VA)
- – Trunk B: (1 × 27.9) + (1 × 20) + (2 × 19.4) = 86.7 VA
- – Trunk C: (1 × 27.9) + (1 × 19.4) + (1 × 5.7) = 53.0 VA
- 2. Calculate the voltage available at the last controller on each run to verify that it is greater than the minimum required voltage for the device.
- /
- Fig. 42: Completed Example Layout.
- 3. Calculate how much power is drawn through each leg:
- Trunk A
- = VA (C1) + VA (C2) + VA (C3) + VA (C4) + VA (C5)
- Leg 1
- = 15 + 13.6 + 13.6 + 13.6 + 32.75
- = 88.55 VA
- = VA (C1) + VA (C2) + VA (C3) + VA (C4)
- Leg 2
- = 10 + 13.6 + 13.6 + 13.6
- = 55.8 VA
- = VA (C4)
- Leg 3
- = 13.6 VA
- = VA (C1) + VA (C2)
- Leg 4
- = 15 + 13.6
- = 28.6 VA
- = VA (C1)
- Leg 5
- = 15 VA
- By similar calculations, power drawn through the remaining legs is:
- Trunk C
- Trunk B
- Leg 1 = 42.6 VA
- Leg 1 = 66.7 VA
- Leg 2 = 33.6 VA
- Leg 2 = 19.4 VA
- Leg 3 = 27.9 VA
- Leg 3 = 47.3 VA
- Leg 4 = 27.9 VA
- ◈ Determine the voltage drop for each leg:
- a Where:0.005 is the resistance in ohms/ft. for a pair of No. 14 AWG wires.
- Trunk A
- Vdrop (Leg 1) = (74.75 VA / 24V) × 0.005 ohms/ft × 10 ft. = 0.16V
- Vdrop (Leg 2) = (42.2 VA / 24V) × 0.005 ohms/ft × 15 ft. = 0.13V
- Vdrop (Leg 3) = (13.6 VA / 24V) × 0.005 ohms/ft × 40 ft. = 0.11V
- Vdrop (Leg 4) = (28.6 VA / 24V) × 0.005 ohms/ft × 10 ft. = 0.06V
- Vdrop (Leg 5) = (15 VA / 24V) × 0.005 ohms/ft × 50 ft. = 0.16V
- By similar calculations, the voltage drops for the remaining legs are:
- Trunk C
- Trunk B
- Vdrop (Leg 1) = 0.28V
- Vdrop (Leg 1) = 0.18 V
- Vdrop (Leg 2) = 0.28V
- Vdrop (Leg 2) = 0.06V
- Vdrop (Leg 3) = 0.15V
- Vdrop (Leg 3) = 0.64V
- Vdrop (Leg 4) = 0.15V
- ◈ Determine the voltage available at the last remote actuator (A1) on controller (C1):
- Calculate the starting voltage:Starting voltage = 24V × 0.9 = 21.6VWhere:0.9 is an efficiency factor.
- a.
- Calculate the voltage drop to the last controllers or remote actuators:Vdrop (to C1) = Vdrop (Leg 5) + Vdrop (Leg 4) + Vdrop (Leg 2) + Vdrop (Leg 1)= 0.16V + 0.06V + 0.13V + 0.16V= 0.51V
- b.
- Calculate the voltage at the last controller remote actuatorV(A1) = Starting voltage – Vdrop (to A1)= 21.6V – 0.51V= 21.09V
- c.
- Check that your calculation is greater than the minimum required voltageThe minimum voltage for a DXR2 Automation Station: 20.4VSince 21.09V is greater than the 20.4V required this leg is correct.
- d.
- If these calculations had resulted in a voltage less than the minimum required, it would have been necessary to reconfigure the layout of the power trunk.
- NOTE:Rerouting the power trunk so that controllers with the lowest minimum voltage requirements are at the end of the run, and controllers with the highest minimum voltage requirements are closest to the transformer can help correct voltage drop problems.If this is not possible, or still does not provide the necessary voltage at the last device, try using a T-shaped power trunk (such as Trunks A or B) rather than a straight line (such as Trunk C) to reduce the voltage drop even further. In other words, a T-shaped power trunk allows you to obtain a higher voltage at the last controller. Using larger gauge wire for the power trunk will also help reduce the voltage drop.
- To complete this example, the results for the last controllers on the remaining runs are found to be:
- Status
- Minimum
- Voltage
- OK
- 19.2
- 21.16
- V(C4)
- OK
- 19.2
- 20.63
- V(C6)
- OK
- 19.2
- 21.36
- V(C10)
- OK
- 19.2
- 20.89
- V(C7)
- Since there are different types of equipment controllers (various DXR2s, PTEC/TECs, etc.) with different minimum power requirements mixed on the same trunk, you must identify the last type of each controller on each trunk. Determine if any of these controllers has a higher minimum voltage requirement than the controller at the end of the run. In this example, calculations are also necessary to determine the following:
- Status
- Minimum
- Voltage
- OK
- 20.4
- 20.94
- V(C5)
- OK
- 20.4
- 21.42
- V(C8)
- Since the voltage at each controller was found to be greater than the minimum requirement, this layout is correct.
- 1. Using the trunk configuration that was defined and verified in Step 3 above, there are a number of options available:
- – Two 100 VA transformers and one 75 VA transformer can be chosen from Table Physical Network Limitations and provided with 4A fuses.
- – Two 100 VA transformers can be chosen from Table Physical Network Limitations, each provided with 4A fuses, and one 55 VA or larger inherently limited transformer from a local source could be used.
- – If local codes permit, one 250 VA transformer can be chosen from Table Physical Network Limitations and provided with three fuses.
- 2. Locate the transformers and fuse block, with three fuses, if required, at the breaker panel. Not all transformers require fuses; however, those that do should be connected as follows:
- – Connect the line side of fuses to the secondaries of the transformers.
- – One power trunk will be connected to the load side of each fuse where required.
- Chapter 3 – Field Panels
- Control Circuit Point Wiring
- LFSSL (Logical FAST/SLOW/STOP Latched)
- LFSSP (Logical FAST/SLOW/STOP Pulsed)
- LOOAL (Logical ON/OFF/AUTO Latched)
- LOOAP (Logical ON/OFF/AUTO Pulsed)
- L2SL (Logical Two State Latched)
- L2SP (Logical Two State Pulsed)
- PX Series Service Boxes
- PX Series 115V Service Boxes (192 VA or 384 VA)
- PX Series 230V Service Boxes (192 VA or 384 VA)
- PX Series Service Box Grounding
- Multiple PX Series Service Boxes on One Power Source
- PXC Service Box Dimensions
- TX-I/O Product Range
- Wire Type Requirements
- Power Source Requirements
- Powering Options
- Metal Oxide Varistors (MOVs)
- TX-I/O Island Bus Guidelines
- TX-IO Module Wiring Diagrams
- Symbols
- Digital Input Modules (TXM1.8D and TXM1.16D)
- Digital Output Modules (TXM1.6R and TXM1.6R-M)
- Universal and Super Universal Modules (TXM1.8U and TXM1.8U-ML; TXM1.8X and TXM1.8X-ML)
- Digital Input, Dry Contacts; Not Supervised, Universal and Super Universal Modules
- Temperature Sensor Input (RTD and Thermistor); Supervised, Universal and Super Universal Modules
- 0-10 Vdc Input (Voltage); Supervised, Universal and Super Universal Modules
- 2-wire and 3-wire Active Input (Current); Supervised, Super Universal Modules Only
- Analog Ouput (Voltage or Current); Not Supervised, Universal and Super Universal Modules
- PXC Compact Series Controller
- Wire Type Requirements
- Power Source Requirements
- Powering Options
- Metal Oxide Varistors (MOVs)
- PXC Compact Series Universal I/O
- PXC Compact Series Wiring Diagrams
- Analog Input, Internally Powered; Supervised
- Analog Input, Externally Powered; Supervised
- Analog Input, RTDs or Thermistors; Supervised
- Analog Output, 0-10 Vdc; Not Supervised
- Analog Output, 0-20 mA
- Digital Input, Dry Contacts; Not Supervised
- Digital Input, Pulse Accumulating; Not Supervised
- Digital Output, Pulsed or Latched; Not Supervised
- Point Expansion or Conversion
- Control Circuit Point Wiring
- The following illustrations apply to the PXC Modular (TX-I/O), PXC Compact, and MEC.
- WARNING
- Do not install the Field Panel HAND/OFF/AUTO (HOA) option for points defined as LFSSL.
- NOTE:DO-1 and DO-2 invert value: NO DI-3 normally closed: NO
- /
- Fig. 43: Connecting an LFSSL (Proof Optional).
- LFSSL Control Circuit States.
- DI-3
- DO-2
- DO-1
- State
- ON
- OFF
- ON
- FAST
- ON
- ON
- OFF
- SLOW
- OFF
- OFF
- OFF
- STOP
- WARNING
- Do not install the Field Panel HAND/OFF/AUTO (HOA) option for points defined as LFSSP.
- NOTE:DI-4 normally closed: NO
- /
- Fig. 44: Connecting an LFSSL (Proof Optional).
- LFSSP Control Circuit States.
- DI-4
- DO-3
- DO-2
- DO-1
- State
- OFF
- OFF
- OFF
- Pulsed ON
- STOP
- ON
- OFF
- Pulsed ON
- OFF
- FAST
- ON
- Pulsed ON
- OFF
- OFF
- SLOW
- WARNING
- Do not install the Field Panel HAND/OFF/AUTO (HOA) option for points defined as LOOAL.
- NOTE:DO-1 and DO-2 invert value: NO DI-3 normally closed: NO
- /
- Fig. 45: Connecting an LOOAL (Proof Optional).
- LOOAL Control Circuit States.
- DI-3
- DO-2
- DO-1
- State
- ON
- ON
- ON
- ON
- OFF
- ON
- OFF
- OFF
- AUTO
- OFF
- OFF
- AUTO
- WARNING
- Do not install the Field Panel HAND/OFF/AUTO (HOA) option for points defined as LOOAP.
- NOTE:DO-3 invert value: NODI-4 normally closed: NO
- /
- Fig. 46: Connecting an LOOAP (Proof Optional).
- LOOAP Control Circuit States.
- DI-4
- DO-3
- DO-3
- DO-1
- State
- ON
- ON
- OFF
- Pulsed ON
- ON
- OFF
- ON
- Pulsed ON
- OFF
- OFF
- AUTO
- OFF
- OFF
- OFF
- AUTO
- WARNING
- Do not install the Field Panel HAND/OFF/AUTO (HOA) option for points defined as L2SL.
- NOTE:DO-1 invert value: NODI-2 normally closed: NO
- /
- Fig. 47: Connecting an L2SL (Proof Mandatory).
- L2SL Control Circuit States.
- DI-2
- DO-1
- State
- ON
- ON
- ON
- OFF
- OFF
- OFF
- WARNING
- Do not install the Field Panel HAND/OFF/AUTO (HOA) option for points defined as L2SP.
- NOTE:DI-3 normally closed: NO
- /
- Fig. 48: Connecting an L2SP (Proof Optional).
- L2SP Control Circuit States.
- DI-3
- DO-2
- DO-1
- State
- ON
- OFF
- Pulsed ON
- ON
- OFF
- Pulsed ON
- OFF
- ON
- CAUTION
- Do not connect inductive loads, such as drill motors, vacuum cleaners, or compressors, to the duplex receptacle on the 115V Service Box.
- PX Series Service Box Source Requirements and Outputs
- Maximum 24 Vac Output
- Maximum Input
- Class 2
- Total1
- 96 VA
- 192 VA
- 2A2
- 2A
- 50/60 Hz
- 115 Vac
- 115V 192VA
- 96 VA
- 384 VA
- 2A2
- 4A
- 50/60 Hz
- 115 Vac
- 115V 384VA
- 96 VA
- 192 VA
- N/A
- 1A
- 50/60 Hz
- 230 Vac
- 230V 192VA
- 96 VA
- 384 VA
- N/A
- 2A
- 50/60 Hz
- 230 Vac
- 230V 384VA
- Total 24 Vac Output Power is distributed to both Class 1 Power Limited Terminations, for use inside the enclosure only, and a Class 2 Termination, which may also be used outside the enclosure.
- Service outlets (115 Vac only) are not fused or switched, but are restricted to continuously-powered network devices (0.5A) and reserve power for laptop computers (1.5A). Plan Branch circuit for each additional 2A.
- DANGER
- Possible shock hazard! The power switch only disables power to the control side of the 24 Vac transformer. Power remains ON at the duplex receptacle (115V versions) and in the service box. Power may be present at the field devices. To avoid injury, follow proper safety precautions.
- 115 Vac source power to the service box enters the enclosure from the top right or right-hand side conduit knockouts. Source voltage must be current-limited to 20 amps or less (15 amps or less for Smoke Control), depending on the requirements of the particular installation.
- Two pigtails and an earth grounding stud are provided under the wire cover for easy connection by an electrician. The AC hot is pre-wired to the transformer through a single pole On/Off switch and a circuit breaker. The pigtails are also connected to a duplex receptacle, which is not internally switched or fused. MOVs (3 × 150V) are installed on input power. Earth ground is available at the CTLR connector and at the duplex receptacle. Transformer secondary neutral (green) and Service Box earth ground (green/yellow) have ring terminals for mounting on earth ground stud.
- Low voltage is routed from the transformer and supplies 24 Vac power at either 192 VA or 384 VA maximum. The CTLR and PS connectors are rated Class 1 power limited and connected equipment must reside in the enclosure with the service box. The Class 2 connector is limited to 96 VA and may also be connected to equipment outside of the enclosure. A MOV (30V) is installed on the transformer secondary. See the following figure for a wiring diagram.
- /
- Fig. 49: Wiring Diagram for 115V Service Box (192 VA or 384 VA).
- 230V (high-voltage) source power to the service box enters the enclosure from the top right or right-hand side conduit knockouts. Source voltage must be current limited to 10 amps or less, depending on the requirements of the particular installation.
- A termination block for power and ground termination is provided on the wire cover for easy connection by an electrician. The termination block is pre-wired to the transformer through a double pole On/Off switch and a circuit breaker. MOVs (3 × 275V) are installed on input power. Termination block earth ground (green/yellow), transformer secondary neutral (green) and Service Box earth ground (green/yellow) have ring terminals for mounting on earth ground stud.
- Low voltage is routed from the transformer and supplies 24 Vac power at either 192 VA or 384 VA maximum. The CTLR and PS connectors are rated Class 1 power limited and connected equipment must reside in the enclosure with the service box. The Class 2 connector is limited to 96 VA and may also be connected to equipment outside of the enclosure. A MOV (30V) is installed on the transformer secondary. See the following figure for a wiring diagram.
- /
- Fig. 50: Wiring Diagram for 230V Service Box (192 VA or 384 VA).
- System Neutral (⊥) must be continuous throughout the TX-I/O bus.
- ● System Neutral is required to be earth-grounded at a single point only.
- ● For a PXA Service Box: Connect the green wire to the earth ground stud under the wire cover.
- ● For migrating with an MEC Service Box: The earth ground is installed in the primary field panel by a single external jumper between the service box E terminal and N terminal.
- ● For a Third-party Transformer connect the transformer secondary neutral to the building-approved earth ground at the terminal block.
- ● When a separate 24Vac source is installed in any secondary field panel isolate power using a TXA1.IBE communication module in primary and each secondary field panel.
- See the following figures for wiring information.
- /
- Fig. 51: Grounding Diagram for 115V Service Box (192 VA or 384 VA).
- /
- Fig. 52: Grounding Diagram for 230V Service Box (192 VA or 384 VA).
- /
- Fig. 53: Detail of PX Series Enclosure Earth Ground Stud (Under Wire Cover).
- The following table shows the number of PX Series Service Boxes allowed on a single three-wire (ACH, an ACN, and earth ground) circuit, if local code permits.
- Number of PX Series Service Boxes Allowed on a Single Three-Wire Circuit.
- Maximum Values for Evenly Spaced Loads
- Maximum Values for Concentrated Loads
- 192/384 VA3
- Length2
- 192/384 VA3
- Length2
- Circuit Breaker Size 1
- 6/3
- 8/4
- 130 ft (40.63 m)
- 115 ft (35.06 m)
- 10 amp (No.14 AWG THHN) (230V models only)
- 3/2
- 3/2
- 100 ft (30.48 m)
- 75 ft (22.87 m)
- 15 amp (No.14 AWG THHN)
- 4/3
- 4/3
- 130 ft (40.63 m)
- 115 ft (35.06 m)
- 20 amp (No.12 AWG THHN)
- For 115 Vac versions, assume minimum voltage of 102 Vac at the circuit breaker and 5 Vac maximum voltage drop (97 Vac) at loads. For 230 Vac versions assume minimum voltage of 204 Vac at the circuit breaker and 10 Vac maximum voltage drop (194 Vac) at loads. See Class 1 power trunk information in the Wire Specification Tables section of Chapter 1. Smoke control applications may not exceed 15 ampcircuit breakers.
- Conduit length from PX Series Service Box to PX Series Service Box.
- Number includes 2A reserved for duplex outlet on 115 Vac versions; not used with 10A circuit breakers.
- /
- Fig. 54: 115V Service Box (192 VA or 384 VA).
- /
- Fig. 55: 230V Service Box (192 VA or 384 VA).
- TX-I/O Wire Type Requirements.
- Conduit Sharing2)
- Maximum Distance1
- Wire Type
- Class
- Circuit Type
- Check local codes
- See NEC and PX Series Service Boxes [➙ 86]
- No. 12 to No. 14 AWG THHN
- 1
- AC Line Power (120V or greater) to transformer
- Check local codes
- 750 ft (230 m)1)
- No.18 to No.22 AWG, TP3) or TSP4 CM (FT4) or CMP (FT6)3)
- 2
- Universal Input/Output
- Check local codes
- 295 ft (90 m)1)
- 24 AWG UTP5), solid 4 pair unshielded
- 2
- Low Voltage Input/Outputon SCS (Basic Link)
- Check local codes
- 33 ft (10 m)1)
- 24 AWG UTP5), stranded 4 pair unshielded
- 2
- Low Voltage Input/Outputon SCS (Patch Cables)
- Check local codes
- 750 ft (230 m)
- No.14 to No.22 AWG. TP not required below 1 Hz. at faster pulse speeds, use TP or TSP4); check job specifications and local codes.
- 2
- Dedicated Digital Input
- Check local codes
- Check local codes
- No.14 to No.22 AWG. TP not required; check job specifications and local codes.
- 1, 2
- Digital Output
- N/A
- 10 ft (3 m)
- No. 14 or 16 AWG, 2 Twisted Pair (TP)
- 2
- TX-I/O Island Bus
- Low voltage AC, low voltage DC, and communication inside low voltage enclosure.
- Check local codes
- 164 ft (50m)6)
- 1 Twisted Shielded Pair (TSP) + 1 Twisted Shielded 3C (Triad)
- 2
- TX-I/O Island Bus
- Low voltage AC, low voltage DC, and communication between enclosures or inside high voltage enclosures7).
- -or- 1 Twisted Shielded 4C, No. 14 AWG or 16 AWG
- Check local codes
- 2 × 200 ft (61 m)
- 24 AWG 1.5-pair (1 TP & 1 Conductor) with overall shield and drain wire.
- 2
- TX-I/O Island Bus Expansion Communication and Power
- 24 AWG Low Cap Twisted shielded pair (TSP).
- Wire length affects point intercept entry. Adjust intercept accordingly.
- Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except where local codes permit. (Both Class 1 and Class 2 wiring can be run in the field panel providing the Class 2 wire is UL listed 300V 75°C (167°F) or higher, or the Class 2 wire is NEC type CM (FT4) (75°C or higher) or CMP (FT6) (75°C or higher). NEC type CL2 and CL2P is not acceptable unless UL listed and marked 300V 75°C (167°F) or higher.
- Twisted pair, non-jacketed, UL listed 75°C (167°F) and 300V cable can be used in place of CM (FT4) or CMP (FT6) (both must be rated 75°C or higher) cable when contained in conduit per local codes. See the Field Purchasing Guide for wire.
- Twisted Shielded Pair TSP is not required for general installation, does not affect TXIO Module specifications, and may be substituted where otherwise specified. TSP should be used in areas of high electrical noise (for example when in proximity to VFDs and other large motors). Where used, connect the shield drain wire to the grounding system inside enclosure.
- Cable must be part of a Structured Cabling System (SCS).
- Maximum distance is total of all cable on the TX-I/O island bus for 14 AWG four conductor cable. See the formulas in this section for associated maximum power and maximum distance for each wire type.
- See TX-I/O Island Bus Guidelines [➙ 97] in this section for cable configuration.
- WARNING
- Install external supply line fusing in series with relay contacts and controlled device. Fuse type and value should be lowest required by control relay datasheet or controlled device datasheet.
- Failure to install fuse may result in damage to relay or device.
- TX-I/O Power Source Requirements – I/O Modules.
- Maximum Power1)
- Input Voltage
- Part Number
- Product
- 1.1 W
- 24 Vdc
- TXM1.8D
- Digital Input Module
- 1.4 W
- 24 Vdc
- TXM1.16D
- Digital Input Module
- 1.7 W
- 24 Vdc
- TXM1.6R
- Relay Module
- 1.9 W
- 24 Vdc
- TXM1.6R-M
- Relay Module
- 1.5 W 2
- 24 Vdc
- TXM1.8U
- Universal Module
- 1.8 W 2
- 24 Vdc
- TXM1.8U-ML
- Universal Module
- 2.2 W2) 3)
- 24 Vdc
- TXM1.8X
- Super Universal Module
- 2.3 W 2,3
- 24 Vdc
- TXM1.8X-ML
- Super Universal Module
- The 24 Vdc self forming TX-I/O Bus and interconnecting wiring is Class 2.
- Class 2 Distribution Terminals are provided for 24 Vac.
- Class 2 Distribution Terminals are provided for 24 Vdc. A maximum of 4.8 W per module may be distributed for external sensors. This is not included in the maximum power shown above.
- PXC Series Power Source Requirements.
- 24 Vdc Sensor Power Output1)
- Maximum Power Consumption
- Input Voltage
- Product
- N/A
- 24 VA
- 24 Vac
- PXC Modular
- 200 mA
- 35 VA
- 24 Vac
- PXC Compact 36
- 200 mA
- 20 VA
- 24 Vac
- PXC Compact 24
- 200 mA
- 18 VA
- 24 Vac
- PXC Compact 16
- 24 Vdc for up to eight external sensors at 25 mA each. Combined total of the external sensor power outputs cannot exceed 200 mA ±10% over full operating temperature range.
- TX-I/O Power Source Requirements – Power Modules and Bus Modules.
- Maximum Output
- Maximum Input Power
- Line Frequency
- Input Voltage
- Product
- 24 Vdc
- 24 Vdc1)
- 96 VA
- 28.8 W
- 150 VA
- 50/60 Hz
- 24 Vac
- Power Supply Module
- 96 VA
- 0 W
- 96 VA
- 50/60 Hz
- 24 Vac
- Bus Connection Module
- N/A
- N/A
- 1.2 W
- N/A
- 24 Vdc
- Island Bus Expansion Module
- 96 VA
- 14.4 W
- 125 VA
- 50/60 Hz
- 24 Vac
- P1 Bus Interface Module
- 24 Vdc power may be shared.
- Input 24 Vac
- One of the options for powering TX-I/O modules and 24V devices is the PX Series Service Box.
- See PX Series Service Boxes [➙ 86] in this chapter for more information.
- Analog Input Powered Devices
- The 24 Vdc output terminals on TXM1.8X and TXM1.8X-ML modules can power approved sensors or devices that draw less than 4.8 W (200 mA) total. Subtract the sensor or device power source requirements and the TX-I/O power source requirements from the maximum output of the TX-I/O Power Supply or P1 BIM.
- An external source must power sensors that require more power than the TX-I/O Power Supply or P1 BIM can provide. The external source can be connected to the same AC line as the 24 Vac transformer or service box as long as it is only used to power low voltage devices (less than 30 volts).
- Analog Output Powered Devices
- The TX-I/O Power Supply and P1 BIM each provide 24 Vac 96 VA maximum Class 2 power distribution from the service box to the TX-I/O module AC outputs.
- MOVs are not factory installed on the Digital Output module terminals. Install MOVs at the appropriate voltage rating on the DO terminals to prolong contact life. See Table MOV part number in the Controlling Transients [➙ 24] section of Chapter 1 for recommended MOV types.
- /
- Fig. 56: Figure 47. Field Installed MOVs.
- Diagram
- Specifics
- Power and Communications
- Figure ALN Trunk Shield Connection [➙ 50]
- RS-485; Supervised
- ALN
- Figure FLN P1 Trunk Shield Connection [➙ 51]
- RS-485; Supervised
- FLN
- See the TX-I/O Island Bus Wiring Diagrams
- 24 Vac; Supervised
- Power
- 24 Vdc; Supervised
- TX-I/O island bus
- RS-485; Supervised
- TX-I/O island bus expansion
- Specifics
- Power and Communications
- RS-485; Supervised
- ALN
- RS-485; Supervised
- FLN
- 24 Vac; Supervised
- Power
- 24 Vdc; Supervised
- TX-I/O island bus
- CAUTION
- To ensure error free communication and prevent equipment damage, observe the TX-I/O island bus wiring guidelines in this section.
- ● All connections to 24 Vac must be home run back to transformer.
- ● Distribute 24V~ transformer power to additional TX-I/O Power Supplies and Bus Connection Modules using twisted pair cable in a star configuration.
- ● Distribute 24 Vdc Communication Supply and Data (CS/CD//) from the TX-I/O Power Supply or P1 BIM to other power supplies or Bus Connection Modules using twisted pair cable in a chain configuration.
- ● When using NEC Class 2 wiring on a TX-I/O island bus extended from an enclosure with a transformer, install a circuit interrupter to limit up to 4A maximum where necessary. A 4A interrupted output is available on the PX Series Service Boxes.
- ● TX-I/O island bus cables (24V~///CS/CD) must be run together either by NEC Class 2 methods or, where not limited by local code, by NEC Class 1 power limited methods.
- WARNING
- Equipment damage may occur if system neutral (/) is not connected to building approved earth ground at the transformer.
- TX-I/O Island Bus
- The TX-I/O island bus consists of the following signals:
- ● Communication and supply (CS)
- ● Communication data (CD)
- ● AC power (24V~)
- ● System neutral (/)
- These signals operate over the self-forming TX-I/O module rails and are externally available at TX-I/O Power Supply and Bus Connection Module connectors.
- TX-I/O Island Bus Expansion
- The TX-I/O island bus expansion consists of the following signals:
- ● Communication data (CD) over RS-485 (+)
- ● Communication data (CD) over RS-485 (–)
- ● Signal common over RS-485 (/)
- These signals operate over RS-485 cable and are available at Island Bus Expansion module connectors.
- Controllers that Support a TX-I/O Island Bus.
- P1 Bus Interface Module (BIM)
- PXC Compact 36
- PXC Modular Series
- Points Supported
- TX-I/O Modules Supported (Maximum)
- 3
- 4
- 4
- Power Supplies Supported
- 14.4 W2
- N/A1
- N/A1
- TX-I/O Power Supply
- Use a TX-I/O Power Supply to power TX-I/O modules. See Figure RS-485 ALN Trunk Shield Connection [➙ 50].
- See Figure RS-485 FLN (P1) Trunk Shield Connection—Electronic Output [➙ 51].
- ● A maximum of 16 bus connections are permitted per island bus. For example, 1 P1 BIM + 3 TX-I/O Power Supply modules + 12 Bus Connection Modules = 16 bus connection points.
- Controllers that Support a TX-I/O Island Bus.
- TC Compact 36
- TC Modular Series
- Points Supported
- TX-I/O Modules Supported (Maximum)
- 4
- 4
- Power Supplies Supported
- ● A maximum of 16 bus connections are permitted per island bus. For example, 4 TX-I/O Power Supply modules + 12 Bus Connection Modules = 16 bus connection points
- ● On a TX-I/O island bus, multiple power supplies may be used in parallel (connected using CS/CD terminals), or up to two power supplies may be used in series (self-forming bus rails).
- See Table TX-I/O Wire Type Requirements [➙ 93] for the maximum island bus distance.
- /
- Fig. 57: PXC Modular with TX-I/O Island Bus—Power and Communication Wiring.
- /
- Fig. 58: PXC-36 with TX-I/O Island Bus—Power and Communication Wiring.
- NOTE: The common terminal from the PXC-36 to the Power Supply module on the Island Bus must be connected.
- /
- Fig. 59: Compact 36 to TX-I/O Power Supply Wiring.
- /
- Fig. 60: TX-I/O Power Supply to Bus Connection Module Wiring.
- The maximum TX-I/O island bus cable length is 164 ft (50 m). This length is based on 54 picofarads per foot (pF/ft) capacitance, which is typical of shielded PVC tray cable.
- ● When the TX-I/O island bus is inside an electrically quiet enclosure, use 2 Twisted Pair (TP) with 24V~// home run to the transformer and CS/CD run between the Power Supply or Bus Connection Module. System Neutral (/) is not required to run with CS/CD.
- ● For use between enclosures or in an electronically noisy enclosure where AC and DC power require the same size cable, use 1 Twisted Shielded 4C for CS/CD///24V~.
- ● For use between enclosures or in an electronically noisy enclosure where AC and DC power require different size cable, use 1 TSP for 24V~// and 1 Twisted Shielded 3C (Triad) for CS/CD//.
- Operating the TX-I/O Bus in an Electrically Noisy Enclosure
- Electrically noisy enclosures include motor control cabinets with VFD or motor power greater than 100 kVA, such as direct online (DOL) starters for motors greater than 25 HP.
- The TX-I/O island bus cable must be shielded and separated from high voltage wire as described in Chapter 1 [➙ 15].
- Calculating the Maximum TX-I/O Island Bus Cable Length
- The following factors are used to determine the maximum TX-I/O island bus cable length or power transfer:
- ● Total capacitance
- ● Vdc drop
- ● Vac drop
- Total capacitance includes all branches. Total TX-I/O island bus cable capacitance must be less than 9 nanofarads (nF). Exceeding this limit causes communication errors.
- Maximum power delivered to each branch is determined by TX-I/O island bus length for the branch, cable resistance and allowable voltage drop factor (12 for DC or 48 for AC).
- R = 2 × branch length in feet × Ω/ft cable, or
- R = 2 × branch length in meters × Ω/m cable
- Where:
- R is determined using maximum ambient temperature of wire at 75°C not mean 25°C.
- 2.0mm2 = 0.0104 Ω/m
- 14 AWG = 0.006 Ω/ft
- 1.25mm2 = 0.0168 Ω/m
- 16 AWG = 0.009 Ω/ft
- Maximum DC Power (CS, CD, /) = Vdrop × Vdc / R = 0.5 Vdc × 24 Vdc / R = 12 V2 / R
- Maximum AC Power (24V~, /) = Vdrop × Vac / R = 2 Vac × 24 Vac / R = 48 V2 / R
- Calculating the maximum TX-I/O island bus power that a Power Supply can deliver to a Bus Connection Module over the maximum wire length (164 ft).
- ● One 14 AWG shielded triad (CS, CD, /) + One 14 AWG twisted shielded pair (24V~, /)
- ● R(14 AWG) = 2 × 164 ft × 0.006 Ω/ft = 1.968 Ω ~ 2 Ω
- ● Maximum DC Power = 12 V2 / 2 Ω = 6 W
- ● Maximum AC Power = 48 V2 / 2 Ω = 24 VA
- - or -
- ● One 16 AWG twisted shielded 4 Conductor (CS, CD, /, 24V~)
- ● R(16 AWG) = 2 × 164 ft × 0.009 Ω/ft = 2.952 Ω ~ 3 Ω
- ● Maximum DC Power = 12 V2 / 3 Ω = 4 W
- ● Maximum AC Power = 48 V2 / 3 Ω = 16 VA
- Calculating the maximum distance between a fully-loaded Bus Connection Module and a Power Supply.
- ● One 14 AWG twisted shielded 4 Conductor (CS, CD, /, 24V~)
- ● R(14 AWG) = 2 × 164 ft × 0.006 Ω/ft = 1.968 Ω ~ 2 Ω
- ● DC Length = 12 V2 / (2 × 0.006 Ω/ft × 28.8 W) = 35 ft
- ● AC Length = 48 V2 / (2 × 0.006 Ω/ft × 96 VA) = 42 ft
- ● DC Length must be no greater than 35 ft
- ● If 4 branches are used, the total length of 140 ft is within the 164 ft maximum.
- ● Transformer at the power supplies must be at least 4 × 150 VA + 24 VA (PXC) = 624 VA
- ● Each branch must have a 24V~ interrupt to be run as Class 2
- Specifics [Page Number]
- Module Type
- Digital Input Module Terminal Layout [➙ 106]
- Digital Input Modules (TXM1.8D and TXM1.16D)
- Dry Contacts; Supervised
- Digital Output Module Terminal Layout [➙ 108]
- Digital Output Modules (TXM1.6R and TXM1.6R-M)
- Latched; Not Supervised
- Pulsed; Not Supervised
- Universal Module Terminal Layout [➙ 110]
- Universal and Super Universal Input/Output Modules (TXM1.8U, TXM1.8U-ML, TXM1.8X, and TXM1.8X-ML)
- Super Universal Module Terminal Layout [➙ 110]
- Digital Input (Dry Contacts; Not Supervised) [➙ 111]
- Digital Input (Using AI, Supervised)See MEC Wiring Diagram to Use an AI as a DI [➙ 178]
- Temperature Sensor Input (RTD and Thermistor; Supervised) [➙ 112]
- 0-10 Vdc Input (Voltage; Supervised) [➙ 112]
- 2-wire and 3-wire Active Input (Current; Supervised)—Super Universal Modules Only [➙ 113]
- Analog Output (Voltage or Current; Not Supervised) [➙ 113]
- TX-I/O modules use the following set of symbols.
- System neutral (‘N’ on MEC Service Box)
- Protective Earth (PE) is Approved Building Earth Ground terminal at enclosure (output to terminal “/” on PX Series Service Boxes or terminal ‘E’ on MEC Service Box)
- Protective Ground input on equipment for connection to PE
- Equipotential (RS-485 communications common reference terminal)
- Configurable point
- Output (arrow pointing OUT from center of module)
- Input (arrow pointing IN toward center of module)
- 24 Vdc output (field supply)
- AC/DC output, 12 to 24V (field supply)
- ~
- 24 Vac input from Service Box (‘H’ on MEC Service Box)
- NOTE:Potential free (dry contact) for all points. The neutral of a digital input can be connected to any neutral terminal on the same module. Several digital inputs can also share a neutral terminal on the same module.
- NOTE:Counter inputs faster than 1 Hz that are routed for more than 33 ft (10 m) in the same wire runs as analog inputs must be shielded.
- Digital Input Module Terminal Layout.
- TXM1.16D only
- TXM1.8D, TXM1.16 D
- (16)
- (15)
- (14)
- (13)
- (12)
- (11)
- (10)
- (9)
- (8)
- (7)
- (6)
- (5)
- (4)
- (3)
- (2)
- (1)
- 32
- 30
- 28
- 26
- 24
- 22
- 20
- 18
- 15
- 13
- 11
- 9
- 7
- 5
- 3
- 1
- System Neutral / (–)1)
- 33
- 31
- 29
- 27
- 25
- 23
- 21
- 19
- 16
- 14
- 12
- 10
- 8
- 6
- 4
- 2
- Input (+)
- Terminals 1, 3, 5 etc. are neutral terminals. They are connected in the plug-in I/O module but not in the terminal base. When the I/O module is removed, there is no connection.
- Dry Contacts; Supervised, Digital Input Module
- Status contact (N/O)
- K1
- Status contact (N/C)
- K2
- Pulsed accumulator
- K3
- Electronic switch (rated for 30V, 10 mA)
- S5
- DANGER
- Digital Output modules connected to high voltage should incorporate a readily accessible disconnect device outside the panel.
- All low voltage and high voltage wiring must be routed separately within an enclosure so that low voltage and high voltage wiring cannot come in contact with each other. High- and low-voltage circuits cannot be located on adjacent terminals within a module.
- Digital Output Module Terminal Layout.
- (6)
- (5)
- (4)
- (3)
- (2)
- (1)
- 32
- 26
- 20
- 15
- 9
- 3
- 33
- 27
- 21
- 14
- 8
- 2
- 31
- 25
- 19
- 16
- 10
- 4
- For logical point types with several I/O points, do the following:
- ● Always use adjacent I/O points.
- ● Confine each logical point type to one module only.
- Latched; Not Supervised, Digital Output Module
- Switched load (NO contact)
- Q1
- Switched load (NC contact)
- Q2
- Pulsed; Not Supervised, Digital Output Module
- Pulse-driven device (for example, a stepping switch)
- Q1
- Power contactor, self-latching
- K1
- Universal Modules
- Super Universal Modules
- Universal Module Terminal Layout.
- (8)
- (7)
- (6)
- (5)
- (4)
- (3)
- (2)
- (1)
- 31
- 27
- 23
- 19
- 14
- 10
- 6
- 2
- Measuring Neutral / (-)1)
- 33
- 29
- 25
- 21
- 16
- 12
- 8
- 4
- Input / (+)
- Selected from: 7, 15, 24, 32
- AC Actuator Supply Voltage2)
- All measuring/neutral terminals are connected in the plug-in I/O module, not in the terminal base. When the I/O module is removed, there is no connection. The neutral of a digital input can be connected to any neutral terminal on the same module. Several digital inputs can also share a neutral terminal.
- All AC actuator supply voltage terminals are connected in the I/O module, not in the terminal base. They are protected through the fuse on the TX-I/O Power Supply or P1 BIM.
- Super Universal Module Terminal Layout.
- (8) 1)
- (7) 1)
- (6) 1)
- (5)1)
- (4)
- (3)
- (2)
- (1)
- 31
- 27
- 23
- 19
- 14
- 10
- 6
- 2
- Measuring Neutral / (-)2)
- 33
- 29
- 25
- 21
- 16
- 12
- 8
- 4
- Input / (+)
- Selected from: 7, 15, 24, 32
- AC Actuator Supply Voltage3)
- Selected from: 3, 11, 20, 28
- 24 Vdc Sensor Supply Voltage4)
- 0 to 20 mA output is available on points 5 through 8 only.
- All measuring/neutral terminals are connected in the plug-in I/O module, not in the terminal base. When the I/O module is removed, there is no connection. The neutral of a digital input can be connected to any neutral terminal on the same module. Several digital inputs can also share a neutral terminal.
- All AC actuator supply voltage terminals are connected in the I/O module, not in the terminal base. They are protected through the fuse on the TX-I/O Power Supply or P1 BIM.
- All 24 Vdc supply terminals are connected. They are overload protected in the module.
- Status contact (N/O)
- K1
- Status contact (N/C)
- K2
- Pulsed accumulator
- K3
- Electronic switch (rated for 30V, 6 mA for 150 ms, then 1 mA)
- S5
- Ni 1000 LS
- B1
- RTD or 100K, 10K Type II and 10K Type III Thermistor temperature sensors
- B2
- Resistive Input – Not supported
- R3
- 0-10V sensor with external supply
- B4
- 0-10V sensor with 24 Vac supply
- B5
- Active sensor with 24 Vdc supply
- B4
- Active sensor with 24 Vac supply
- B5
- Active sensor 4 to 20 mA (2 wire)
- B6
- Active sensor with external supply (earth ground only at Service Box)
- B7
- /
- 0-10 Vdc available on Universal and Super Universal modules, points 1-8.
- 4-20 mA only available on Super Universal modules, points 5-8.
- Actuator with control input only
- Y1
- 24 Vac internal
- Y2
- 24 Vdc internal
- Y3
- 24 Vac external
- Y4
- NOTE:UL-recognized wire (labeled with a backwards “RU”) is not field-installable. Use only UL-listed wire.
- For analog inputs, termination for shield is provided, if required. Termination for shield is not provided for digital inputs. For more information, see the PXC Compact Series wiring diagrams [➙ 119].
- NOTE:UL-recognized wire (labeled with a backwards “RU”) is not field-installable. Use only UL-listed wire.
- For analog inputs, termination for shield is provided, if required. Termination for shield is not provided for digital inputs. For more information, see the wiring diagrams.
- PXC Compact Series Wire Type Requirements.
- Conduit Sharing2)
- Maximum Distance1)
- Wire Type
- Class
- Circuit Type
- Check local codes
- See NEC3)
- No. 12 to No. 14 AWG THHN
- 1
- AC Line Power (120V or greater)
- Check local codes
- See NEC3)
- No. 12 to No. 18 AWG THHN
- 2
- AC Low Voltage Power
- Check local codes
- 750 ft (230 m)
- No.18 to No.22 AWG, TP4) or TSP5) CM (FT4) or CMP (FT6)4)
- 2
- Universal Input/Output
- Universal Input/Outputon SCS (Basic Link)
- Check local codes
- 295 ft (90 m)
- 24 AWG UTP6), solid
- 2
- Check local codes
- 33 ft (10 m)
- 24 AWG UTP6), stranded
- 2
- Universal Input/Outputon SCS (Patch Cables)
- Check local codes
- 750 ft (230 m)
- No.14 to No.22 AWG. TP not required5); check job specifications and local codes.
- 2
- Dedicated Digital Input
- Check local codes
- Check local codes
- No.14 to No.22 AWG. TP not required; check job specifications and local codes.
- 1, 2
- Digital Output
- See Wire Type Requirements in the section, TX-I/O Product Range [➙ 93].
- TX-I/O Island Bus Cable
- Wire length affects point intercept entry. Adjust intercept accordingly.
- Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except where local codes permit. (Both Class 1 and Class 2 wiring can be run in the field panel providing the Class 2 wire is UL listed 300V 75°C (167°F) or higher, or the Class 2 wire is NEC type CM (FT4) (75°C or higher) or CMP (FT6) (75°C or higher). NEC type CL2 and CL2P is not acceptable unless UL listed and marked 300V 75°C (167°F) or higher.
- National Electric Code.
- Twisted pair, non-jacketed, UL listed 75°C (167°F) and 300V cable can be used in place of CM (FT4) or CMP (FT6) (both must be rated 75°C or higher) cable when contained in conduit per local codes. See the Field Purchasing Guide for wire.
- Twisted Shielded Pair TSP is not required for general installation, does not affect PXC Compact specifications, and may be substituted where otherwise specified. TSP should be used in areas of high electrical noise (for example when in proximity to VFDs and 100 kVa or larger motors). Where used, connect the shield drain wire to the grounding system inside enclosure.
- Cable must be part of a Structured Cabling System (SCS).
- PXC Compact Power Source Requirements.
- Maximum Power1) 2)
- Line Frequency
- Input Voltage
- Product
- 50/60 Hz
- 24 Vac
- PXC-16
- 50/60 Hz
- 24 Vac
- PXC-24
- 50/60 Hz
- 24 Vac
- PXC-36
- The 24V wiring is Class 2.
- An external connection is provided for power at 24 Vdc at 50 mA per termination (200 mA maximum all terminations) for external sensors.
- WARNING
- Install external supply line fusing in series with relay contacts and controlled device. Fuse type and value should be lowest required by control relay datasheet or controlled device datasheet.
- Failure to install fuse may result in damage to relay or device.
- Analog Input Powered Devices
- Approved sensors can be powered by the PXC Compact Series 24 Vdc Sensor Supply.
- ● Version 1 of the PXC-16 and PXC-24 support up to 100 mA. The Version 1 model number format is PXC16-xxx.A or PXC24-xxx.A.
- ● All versions of PXC-36 and Version 2 and later of the PXC-16 and PXC-24 support 200 mA. The Version 2 model number format is PXC16.2-xxx.A or PXC24.2-xxx.A.
- Sensors requiring more power must be powered by an external source.
- ● The external source can be connected to the same 24 Vac line as the PX Series Service Box power supply as long as it is only used to power low voltage devices (less than 30 volts).
- ● An external sensor supply must be connected to the same Building Earth Ground as the PXC Compact
- Analog Output Powered Devices
- The PXC Compact does not provide actuator output power. See the PX Series Service Box [➙ 86] section in this chapter.
- One of the options for powering the PXC Compact, point blocks, and 24V devices is the PX Series Service Box.
- See PX Series Service Boxes [➙ 86] in this chapter for more information.
- MOVs are factory installed on the DO terminals.
- Line Voltage Receptacle
- Line voltage MOVs are factory-installed on all service boxes. If using a third-party transformer, use an appropriate MOV. See Table MOV part number in the Controlling Transients [➙ 24] section of Chapter 1.
- The PXC Compact Series provides Universal Input and Universal Input/Output points that are software-configurable to be 0 to 10 Vdc input, 4 to 20 mA input, 1K RTD input, 10K or 100K Thermistor input, digital input, pulse accumulator input, or 0 to 10Vdc analog output. The point types and their possible configurations are shown in this section.
- PXC-16 Supported Point Types.
- Dedicated Points
- Configurable Points
- Digital Output (DO)Points 14-16
- Digital Input (DI)Points 12-13
- Analog Output (AO)Points 9-11
- Universal Input/Output (U)Points 4-8
- Universal Input (UI)Points 1-3
- Point Type
- •
- •
- Voltage 0 to 10 Vdc
- Analog Input4)
- •
- •
- Current 4 to 20 mA
- •
- •
- RTD Pt 1K1)
- •
- •
- RTD Ni 1K2)
- •
- •
- Thermistor 10K NTC3)
- •
- •
- Thermistor 100K NTC3))
- •
- •
- •
- Status (Binary Input)
- Digital Input
- •
- •
- Pulse Accumulator (Counter)
- •
- •
- Voltage 0 to 10 Vdc
- Analog Output
- •
- Binary/Digital Output
- Digital Output
- Platinum 1K 375 or 385 alpha.
- Siemens, Johnson Controls, and DIN Standard Nickel.
- 10K and 100K Type 2 and 10K Type 3.
- Sensor supply 24 Vdc, 4.8W
- PXC-24 Supported Point Types.
- Dedicated Points
- Configurable Points
- Digital Output (DO)Points 20-24
- Analog Output (AO)Points 17-19
- Super Universal (X)Points 13-16
- Universal Input/Output (U)Points 4-12
- Universal Input (UI)Points 1-3
- Point Type
- •
- •
- •
- Voltage 0 to 10 Vdc
- Analog Input5)
- •
- •
- •
- Current 4 to 20 mA
- •
- •
- •
- RTD Pt 1K1)
- •
- •
- •
- RTD Ni 1K2)
- •
- •
- •
- Thermistor 10K NTC3)
- •
- •
- •
- Thermistor 100K NTC3)
- •
- •
- •
- Status (Binary Input)
- Digital Input
- •
- •
- •
- Pulse Accumulator (Counter)
- •
- •
- •
- Voltage 0 to 10 Vdc
- Analog Output
- •
- Current 0 to 20 mA
- •
- •4)
- Binary/Digital Output
- Digital Output
- Platinum 1K 375 or 385 alpha.
- Siemens, Johnson Controls, and DIN Standard Nickel.
- 10K and 100K Type 2 and 10K Type 3.
- Requires an external relay.
- Sensor supply 24 Vdc, 4.8W
- PXC-36 Supported Point Types.
- Dedicated Points
- Configurable Points
- Digital Output (DO)Points 29-36
- Digital Input (DI)Points 25-28
- Universal Input/Output (U)Points 7-24
- Super Universal (X)Points 1-6
- Point Type
- •
- •
- Voltage 0 to 10 Vdc
- Analog Input5)
- •
- •
- Current 4 to 20 mA
- •
- •
- RTD Pt 1K1)
- •
- •
- RTD Ni 1K2)
- •
- •
- Thermistor 10K NTC3)
- •
- •
- Thermistor 100K NTC3)
- •
- •
- •
- Status (Binary Input)
- Digital Input
- •
- •
- Pulse Accumulator (Counter)
- •
- •
- Voltage 0 to 10 Vdc
- Analog Output
- •
- Current 0 to 20 mA
- •
- •4)
- Binary/Digital Output
- Digital Output
- Platinum 1K 375 or 385 alpha.
- Siemens, Johnson Controls, and DIN Standard Nickel.
- 10K and 100K Type 2 and 10K Type 3.
- Requires an external relay.
- Sensor supply 24 Vdc, 4.8W
- The PXC Compact uses a shared ground between sensors to reduce the number of required terminal connections. The PXC Compact ground contacts are shared as shown the following figures.
- /
- Shared Ground Connections (PXC-16 and PXC-24).
- /
- Shared Ground Connections (PXC-36).
- WARNING
- All transformer or isolated power supply secondary neutrals requiring connection to earth ground must be directly connected to an approved building earth ground terminal located at the point termination module where the signal is terminated.
- This is represented in the following diagrams by “E” at the earth ground symbol.
- Specifics [Page Number]
- Point Type
- Internally powered, voltage or current, supervised [➙ 120]
- Analog Input
- Externally powered, voltage or current, supervised [➙ 121]
- RTDs or Thermistors, supervised [➙ 122]
- 0-10 Vdc, not supervised [➙ 123]
- Analog Output
- 0-20 mA, not supervised [➙ 124]
- Dry contacts, not supervised [➙ 126]
- Digital Input
- Pulse accumulating, not supervised [➙ 127]
- Using AI, Supervised – See the MEC wiring diagram [➙ 178]
- Pulsed or latched, not supervised [➙ 128]
- Digital Output
- /
- Fig. 61: Connecting an Internally Powered Analog Input (Voltage or Current).
- /
- Fig. 62: Connecting an Externally Powered Analog Input (Voltage or Current).
- /
- Fig. 63: Connecting an Analog Input (RTD or Thermistor).
- /
- Fig. 64: Connecting an Analog Output (0 to 10 Vdc).
- /
- Connecting an Analog Output (0 to 20 mA) (PXC-16 and PXC-24).
- /
- Connecting an Analog Output (0 to 20 mA) (PXC-36).
- /
- Fig. 65: Connecting a Digital Input (Dry Contacts).
- A single common may be used for all digital inputs.
- 1)
- Excitation equals 24 Vdc at 6 mA for 150 msec, then 1 mA. Must be stable for 100 msec.
- 2)
- Excitation equals 24 Vdc at 10 mA. Cannot be used for pulse accumulating.
- 3)
- Dry contact only. Does not require gold contacts.
- 4)
- Solid state device must be rated for 30V minimum, with RDS on less than 1K ohms and RDS off greater than 100K ohms.
- 5)
- /
- Fig. 66: Connecting a Digital Input (Pulse Accumulating).
- Excitation equals 24VDC at 6 mA for 150 msec, then 1 mA. Pulse rate equals 20 Hz.
- Separate commons for each input.
- /
- Fig. 67: Connecting a Digital Output (Pulsed or Latched).
- The AO-P Transducer converts field panel voltage output or current output to pneumatic output.
- Recommended maximum wiring runs for the AO-P Transducer Remote Mount (545-208) and the AO-P Transducer Panel Mount (545-113) are listed in table AO-P Transducer Remote Mount and Panel Mount Wiring Run Limitations.
- AO-P Transducer Remote Mount and Panel Mount Wiring Run Limitations.
- Maximum Distance
- Wire Type1)
- Class
- Circuit Type
- 750 ft (230 m)
- No. 18 to 22
- 2
- 24 Vac Power
- 1000 ft (305 m)
- No. 18 to 22 TP
- 2
- 0 to 10 Vdc (Signal)
- 1000 ft (305 m)
- No. 18 to 22 TP
- 2
- 0 to 5 Vdc (feedback)
- 1000 ft (305 m)
- No. 18 to 22
- 2
- Digital Output
- 1000 ft (305 m)
- No. 18 to 22 TP
- 2
- 4 to 20 mA
- See the Wire Specification Tables section in Chapter 1—Wiring for more information.
- Power Source Requirements
- Power Source Requirements for AO-P Transducer.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 1 VA
- 50/60 Hz
- 24 Vac
- AO-P Transducer
- AO-P Wiring Connections.
- Connection
- AO-P Transducer Wire Color
- 24 Vac
- Red (HK)
- Neutral
- Black (N)
- 0 to 10 Vdc, or 4 to 20 mA (Signal +)
- Yellow (+)
- 0 to 5 Vdc (Feedback +)
- White (F)
- Signal/Feedback Negative (-)
- Gray (I-)
- DO (Dry Contact)
- Orange (A)1)
- DO (Dry Contact)
- Orange (B) 1)
- Together, the two orange wires make up the DO. These connections are optional. The DO reports the position of the Hand-Auto switch:- Open Contact=Auto Mode- Closed Contact=Hand Mode
- /
- Fig. 68: Connecting an AO-P Transducer Input.
- NOTE:Both the jumper on the back and the jumper for A09 must be set to current for 4 to 20 mA input.
- Chapter 4 – Equipment Controllers
- Equipment Controller Wire Type Requirements.
- Conduit Sharing1)
- Distance
- Wire Type (AWG)
- Class
- Circuit Type
- Class 2
- Check local codes
- Check local codes
- 2
- Input Power
- Class 2
- 150 ft (46 m)
- Check local codes
- 2
- Digital Output
- Class 2
- 150 ft (46 m)
- Check local codes
- 2
- Analog Output
- Class 2
- 150 ft (46 m)
- No. 18 to No. 22 TP
- 2
- Digital Inputs
- Class 2
- 100 ft (30 m)
- No. 18 to No. 22 TP
- 2
- Analog Inputs
- Class 2
- 100 ft (30 m)
- Pre-terminated 3 TP
- 2
- Room Temperature Sensor
- Class 2
- 1,000 ft (328 m)
- No. 18 to No. 20 STP
- 2
- KNX/PL-Link
- Class 2
- 4,000 ft (1200 m) up to 100 Kbps, 80% above.
- No. 24 STP w/ Reference
- 2
- P1, MS/TP or FCOM
- Class 2
- 4,000 ft (1200 m) up to 100 Kbps, 80% above.
- No. 24, 2 x STP w/ Reference or 3 x STP
- 2
- SCOM
- Class 2
- 260 ft (80 m) No. 14
- No. 18 to No. 14, 4C common twist
- 2
- Actuator/Signal
- Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have no adverse effect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
- BACnet Equipment Controllers can be powered in three ways. Correct sizing and fusing must be maintained for each of these powering techniques:
- ● Individual transformer using a transformer rated for Class 2 service.
- ● Class 2 power trunk. For more information, see the section Power Trunk Guidelines [➙ 67].
- ● Low voltage source of the device the controller is controlling (for example, fan powered boxes, electric room heat, fan coils, and heat pumps).
- Total VA rating is dependent upon the controlled DO loads (for example, actuators, contactors, etc.).
- CAUTION
- The phase of all devices on a power trunk must be identical.
- Phase differences can destroy equipment. Any relays, EPs, or contactors sharing power must be clamped with MOVs at their locations.
- All DOs are normally open, 24 Vac switched triacs. Metal oxide varistors (MOVs) must be used across the DO terminals when connected to loads. MOVs are factory-installed in all ATEC, PTEC, and TEC products.
- When installing MOVs across the DO relay contacts on termination boards, keeping the MOV leads as short as possible makes the MOV more effective at reducing spikes from field wiring or controlled devices. Remove and reinstall any MOVs with leads longer than 1 inch (2.5 cm). See the section Controlling Transients [➙ 24] for MOV part numbers.
- The information in this section also applies to DXP controllers and P1 DXR automation stations except where noted.
- Power Data
- Power Supply
- AC 24V -15%/+20%
- Operating Voltage
- 50/60 Hz
- Frequency
- 4 A irreversible
- Internal fuse
- 4 A resettable or replaceable
- Class 2 Transformer
- AC 20.4V minimum Increase this value by the voltage drop of the wire to the remote field device.
- Controller Voltage Input Required for Attached Field Devices (Triac) 19.2V
- Power supply
- AC 24 V -15%/+20%
- Operating voltage
- 50/60 Hz
- Frequency
- 4 A irreversible
- Internal fuse
- 4 A resettable or replaceable
- Class 2 Transformer
- AC 19.5V minimum Increase this value by the voltage drop of the wire to the remote field device.
- Controller Voltage Input Required for Attached Field Devices (Triac) 19.2V
- CAUTION
- Observe Polarity of AC 24 V~ Power Cable.
- Reversing HOT ~ and COMMON wires on 24V~ connector input can destroy DXR2. Observe color of wire used for HOT and COMMON throughout the power trunk. COMMON originates on the neutral side of the 24 Vac power transformer, which must be tied to earth at the transformer, and only at this point.
- /
- Fig. 69: Connecting Power Cable.
- Maximum Apparent Power (VA) for Transformer Sizing.
- Max. Allowed Power8) Consumption Including Connected Field Devices
- Max. Load DC 24 V+ (2.4 W)7)
- Max. Load KNX PL-Link (at 50 mA)6)
- Max. Load all Aux. Outputs AC 24 V~5)
- Max. Load Triac Output AC 24 V~ 250 mA Each3) 4) 9)
- Base Load2)
- Base Model1)
- 60
- —
- 4
- 12
- 6 x 6 = 36
- 8
- DXR2.E12P
- 72
- 6
- 4
- 18
- 8 x 6 = 48
- 8
- DXR2.E18
- 79
- 3
- 2
- 18
- 4 x 12 = 48
- 8
- DXR2.E17C
- 63
- -
- 4
- -
- 4 x 12 = 48
- 11
- DXR2.E10PL
- 58
- —
- 4
- 12
- 6 x 6 = 36
- 6
- DXR2.M11
- 58
- —
- 4
- 12
- 6 x 6 = 36
- 6
- DXR2.M12P
- 79
- 3
- 2
- 18
- 4 x 12 = 48
- 8
- DXR2.M17C
- 70
- 6
- 4
- 18
- 8 x 6 = 48
- 6
- DXR2.M18
- 62
- -
- 4
- -
- 4 x 12 = 48
- 10
- DXR2.M10PL
- 58
- —
- 4
- 12
- 6 x 6 = 36
- 6
- DXR2.T12P11)
- 70
- 6
- 4
- 18
- 8 x 6 = 48
- 6
- DXR2.T18P11)
- Maximum Apparent Power applies to Base Model only. See the appropriate automation station application manual for information about reducing power requirements.
- Base load includes controller and I/O not including field device loads in other columns.
- Each Triac switches up to 6 VA; use interposing relay for field devices requiring greater load.
- Use AC 20.4V~ minimum. For DXR2 controller power trunk calculations, refer to Chapter 2 – Network Electrical Systems [➙ 30]. Use AC 19.5V~ for Actuating or Lab DXR2.
- Maximum power is available at any V~ terminal or shared between all V~ terminals.
- Switch off PL-Link supply and use external KNX power supplies when KNX device load exceeds maximum.
- Calculate 1 VA for each 0.4 W used by external field devices.
- Total all power used, maximum allowed power listed on product rating label must not be exceeded.
- Maximum load Triac output AC 24V~ 500 mA each for Actuating or Lab DXR2 or DXR2.
- For thermal valve actuators (starting current) with pulse width modulation 5...50% and pulse length of ca. 1 s.
- P1 DXR automation station.
- Identification
- Each device has a unique serial number to ensure efficient commissioning. It is provided on the adhesive barcode label. The serial number can be read directly into the engineering tool using a barcode reader.
- Wiring
- Wiring must be sufficiently insulated to the available rated voltage. Sizing and fusing of the wiring depend on the connected load. See the section Wire Type Requirements [➙ 131].
- Triac Outputs AC 24V (Y1 – Y8)
- Individual Triac outputs may have a maximum load of 6 VA (heating up the device). The following possibilities are permitted:
- ● Multiple motorized actuators with a total of maximum 6 VA.
- ● One (1) thermal actuator with 6 VA (0.25 A) start load in a cold state, controlled using the algorithm PWM 0 through100%.
- ● One (1) thermal actuator with 9 VA (0.37 A) start load each in a cold state, controlled using the algorithm PWM 5 through 50%.
- For transformer design (voltage drop off), each thermal actuator must be counted at the full start load, since the Triac outputs can be freely controlled. The heating sequence and cooling sequence are not normally active at the same time (exception: downdraft compensation).
- The total of the base load, bus power, field supply, and Triacs may not exceed 72 VA (DXR2.E18P) or 70 VA (DXR2.M18P/T18P). The DXR2.E17C/M17C may not exceed 79VA. Power consumption is 96 VA with pulse width modulation. See the section Power Trunk Layout [➙ 72].NOTE: The DXR2.x17C and DXR2.x17CX have a maximum load of 12 VA per Triac.
- For the DXR2… 24V variant, the high side switch Triacs (closed the contact at AC 24V) are used. As a result, the VAV compact controllers GDB181.1E/3 or GLB181.1E/3 can only be set to operating mode con using 0 through 10V.
- DC Through 10V Outputs (Y10 – Y40)
- The DC 0 through 10V outputs supply maximum 1 mA.
- AC 24V Supply for Field Devices (V~)
- Actuators (valves, dampers) and active sensors are supplied directly by the device. Separate AC 24V power supply is only required if field devices consume more than 12 VA (on DXR2.x11… and DXR2.x12…) or 18 VA (on DXR2.x18).
- DC 24V Power Supply for Field Devices (V+), DXR2.x18 and DXR2.x17… Only
- Actuators (valves, dampers) and active sensors are supplied directly by the device. A separate DC 24V field supply is only required if field devices use more than 2.4 Watts.
- Digital Inputs (D1 – D2)
- Digital inputs are not suitable for operating lighting or blinds. Use the KNK PL-Link push button devices.
- Analog Inputs (X1 – X2)
- Analog inputs are not suitable for operating lighting or blinds. Use the KNK PL-Link push button devices.
- IP
- /
- Channel
- Module
- Description
- Symbol
- Terminal
- 2 x RJ45 interface for 2-port Ethernet switch
- 1, 2 Ethernet
- KNX connection
- +, -
- 11, 12 KNX
- 1
- 1
- Digital input
- D1
- 31...36 inputs
- 5, 6
- 1
- Universal input
- X1, X2
- System zero
- ⏊
- Field supply AC 24 V for active sensors
- V~
- USB interface
- USB
- Power SELV / PELV AC 24 V
- V~
- 51...52 power 24 V~
- System zero
- ⏊
- 1...6
- 11
- Switching output AC 24 V
- Y1...Y6
- 61...69 Triacs
- System zero
- ⏊
- 1, 2
- 21
- Positioning output DC 0...10 V
- Y10, Y20
- 81...84 analog outputs
- System zero
- ⏊
- Field supply AC 24 V
- V~
- 1
- 31
- Connected to the higher pressure
- P1+
- ΔP differential pressure detector
- 1
- 31
- Connected to the lower pressure
- P1-
- Service button
- SVC
- Service
- Operation LED
- RUN
- Display
- /
- Channel
- Module
- Description
- Symbol
- Terminal
- 2 x RJ45 interface for 2-port Ethernet switch
- 1, 2 Ethernet
- KNX connection
- +, -
- 11, 12 KNX
- 1, 2
- 1
- Digital input
- D1, D2
- 31...41 inputs
- 5...8
- 1
- Universal input
- X1...X4
- System zero
- ⏊
- Field supply AC 24 V for active sensors
- V~
- Field supply DC 24 V for active sensors
- V+
- USB interface
- USB
- Power SELV / PELV AC 24 V
- V~
- 51...52 power 24 V~
- System zero
- ⏊
- 1...8
- 11
- Switching output AC 24 V
- Y1...Y8
- 61...72 Triacs
- System zero
- ⏊
- 1...4
- 21
- Positioning output DC 0...10 V
- Y10...Y40
- 81...88 analog outputs
- System zero
- ⏊
- Field supply AC 24 V
- V~
- Service button
- SVC
- Service
- Operation LED
- RUN
- Display
- DXR2.E17C
- /
- Channel
- Module
- Terminal
- Description
- Pin
- 2 x RJ45 interface for 2-port Ethernet switch
- 1, 2 Ethernet
- +, -
- KNX connection
- 11, 12 KNX
- 9…10
- 1
- B1, B2
- 10K Resistance input
- 31...41 inputs
- 5…8
- 1
- X1...X4
- Universal input
- ⏊
- System neutral
- V~
- Field supply AC 24 V for active sensors
- V+
- Field supply DC 24 V for active sensors
- USB interface
- USB
- ~
- Power supply SELV / PELV AC 24 V
- 51...52 power 24V~
- ⏊
- System neutral
- 1…3
- 1
- D1, D2, D3
- Digital input
- 61...65 inputs
- ⏊
- System neutral
- +, -
- SCOM
- 71...73
- ⏊
- System neutral
- 1…4
- 11
- Y1...Y4
- Switching output AC 24 V
- 81...86 triacs
- ⏊
- System neutral
- 1…4
- 21
- Y10...Y40
- Positioning output DC 0...10 V
- 91...98 analog outputs
- ⏊
- System neutral
- V~
- Field supply AC 24 V
- SVC
- Service button
- Service
- RUN
- Operation LED
- Display
- SCOM
- Active communication LED
- /
- Channel
- Module
- Terminal
- Description
- Pin
- 2 x RJ45 interface for 2-port Ethernet switch
- 1, 2 Ethernet
- +, -
- KNX connection
- 11, 12 KNX
- USB interface
- USB
- V~
- Power supply SELV / PELV AC 24V
- 51...52 power 24V~
- ⏊
- System neutral
- 3…6
- 11
- Y3…Y6
- Switching output AC 24V
- 64...69 Triac outputs
- 71 Digital output
- 1, 2
- 21
- Y10
- Positioning output DC 0...10 V
- ⏊
- System neutral
- 1
- 1
- D1
- Digital Input
- 73…77
- 5, 6
- 1
- X1, X2
- Universal inputs
- ⏊
- System neutral
- 1
- 31
- P1+
- Connected to the higher pressure
- ΔP differential pressure detector
- 1
- 31
- P1-
- Connected to the lower pressure
- 2
- 11
- Shaft turns clockwise (CW)
- Motor Control Outputs
- 1
- 11
- Shaft turns counter clockwise (CCW)
- SVC
- Service button
- Service
- RUN
- Operation LED
- Display
- MS/TP
- /
- Channel
- Module
- Description
- Symbol
- Terminal
- MS/TP connection
- 21...23 MS/TP
- /, +, -
- KNX connection
- +, -
- 11, 12 KNX
- 1
- 1
- Digital input
- D1
- 31...36 inputs
- 5, 6
- 1
- Universal input
- X1, X2
- System zero
- ⏊
- Field supply AC 24 V for active sensors
- V~
- USB interface
- USB
- Power supply AC 24 V
- V~
- 51...52 power 24 V~
- System neutral (always ground to the transformer)
- ⏊
- 1...6
- 11
- Switching output AC 24 V
- Y1...Y6
- 61...69 Triacs
- System zero
- ⏊
- 1, 2
- 21
- Positioning output DC 0...10 V
- Y10, Y20
- 81...84 analog outputs
- System zero
- ⏊
- Field supply AC 24 V
- V~
- Service button
- SVC
- Service
- Operation LED
- RUN
- Display
- /
- Channel
- Module
- Description
- Symbol
- Terminal
- MS/TP connection
- 21...23 MS/TP
- /, +, -
- KNX connection
- +, -
- 11, 12 KNX
- 1
- 1
- Digital input
- D1
- 31...36 inputs
- 5, 6
- 1
- Universal input
- X1, X2
- System zero
- ⏊
- Field supply AC 24 V for active sensors
- V~
- USB interface
- USB
- Power SELV / PELV AC 24 V
- V~
- 51...52 power 24 V~
- System neutral (always ground to the transformer)
- ⏊
- 1...6
- 11
- Switching output AC 24 V
- Y1...Y6
- 61...69 Triacs
- System zero
- ⏊
- 1, 2
- 21
- Positioning output DC 0...10 V
- Y10, Y20
- 81...84 analog outputs
- System zero
- ⏊
- Field supply AC 24 V
- V~
- 1
- 31
- Connected to the higher pressure
- P1+
- ΔP differential pressure detector
- 1
- 31
- Connected to the lower pressure
- P1-
- Service button
- SVC
- Service
- Operation LED
- RUN
- Display
- DXR2.M17C
- /
- Channel
- Module
- Terminal
- Description
- Pin
- +, -
- MSTP Communication
- 21…23
- Isolated comm. ground reference
- +, -
- FCOM
- 24…26
- Isolated comm. ground reference
- +, -
- KNX connection
- 11, 12 KNX
- 9…10
- 1
- B1, B2
- 10K Resistance input
- 31...41 inputs
- 5…8
- 1
- X1...X4
- Universal input
- ⏊
- System neutral
- V~
- Field supply AC 24 V for active sensors
- V+
- Field supply DC 24 V for active sensors
- USB interface
- USB
- ~
- Power supply SELV / PELV AC 24 V
- 51...52 power 24V~
- ⏊
- System neutral
- 1…3
- 1
- D1, D2, D3
- Digital input
- 61...65 inputs
- ⏊
- System neutral
- +, -
- SCOM
- 71...73
- ⏊
- System neutral
- 1…4
- 11
- Y1...Y4
- Switching output AC 24 V
- 81...86 triacs
- ⏊
- System neutral
- 1…4
- 21
- Y10...Y40
- Positioning output DC 0...10 V
- 91...98 analog outputs
- ⏊
- System neutral
- V~
- Field supply AC 24 V
- SVC
- Service button
- Service
- RUN
- Operation LED
- Display
- SCOM
- Active communication LED
- FCOM
- LED for future use
- /
- Channel
- Module
- Description
- Symbol
- Terminal
- MS/TP connection
- 21...23 MS/TP
- /, +, -
- KNX connection
- +, -
- 11, 12 KNX
- 1, 2
- 1
- Digital input
- D1, D2
- 31...41 inputs
- 5...8
- 1
- Universal input
- X1...X4
- System zero
- ⏊
- Field supply AC 24 V for active sensors
- V~
- Field supply DC 24 V for active sensors
- V+
- USB interface
- USB
- Power SELV / PELV AC 24 V
- V~
- 51...52 power 24 V~
- System neutral (always ground to the transformer)
- ⏊
- 1...8
- 11
- Switching output AC 24 V
- Y1...Y8
- 61...72 Triacs
- System zero
- ⏊
- 1...4
- 21
- Positioning output DC 0...10 V
- Y10...Y40
- 81...88 analog outputs
- System zero
- ⏊
- Field supply AC 24 V
- V~
- Service button
- SVC
- Service
- Operation LED
- RUN
- Display
- /
- Channel
- Module
- Terminal
- Description
- Pin
- MS/TP connection
- 21...23 MS/TP
- /, +, -
- +, -
- KNX connection
- 11, 12 KNX
- USB interface
- USB
- V~
- Power supply AC 24 V
- 51...52 power 24 V~
- ⏊
- System neutral (must always be grounded at the transformer)
- 3…6
- 11
- Y3…Y6
- Switching output AC 24V
- 64...69 Triac outputs
- 71 Digital output
- 1, 2
- 21
- Y10
- Positioning output DC 0...10 V
- ⏊
- System neutral
- 1
- 1
- D1
- Digital Input
- 73…77
- 5, 6
- 1
- X1, X2
- Universal inputs
- ⏊
- System neutral
- 1
- 31
- P1+
- Connected to the higher pressure
- ΔP differential pressure detector
- 1
- 31
- P1-
- Connected to the lower pressure
- 2
- 11
- Shaft turns clockwise (CW)
- Motor Control Outputs
- 1
- 11
- Shaft turns counter clockwise (CCW)
- SVC
- Service button
- Service
- RUN
- Operation LED
- Display
- Use recommended 3-wire (1.5-Pair Network Cable [➙ 40]). Wire the nut shield of both cables or tie back the shield for the end of line, and terminate the shield at router’s MSTP port. Connect the yellow reference wire to common terminal 21, the black wire to – terminal 22 and the white wire to + terminal 23. If DXR2.M is at the MSTP cable end of line, install a 120 Ohm resistor between – terminal 22 and + terminal 23. Observe polarity throughout the MSTP network.
- /
- Fig. 70: Connecting MS/TP Port to 3-Wire (1.5 STP) Cable.
- /
- Fig. 71: Connecting DXR2.M MS/TP Port to Existing 2-Wire (1 STP) Cable.
- For Critical Environment DXRs in a pressurized space:
- ● The DXR2M controllers should have their MSTP ports connected per 1.5 pair recommendations, see MS/TP Connection [➙ 146].
- ● DXR2.M17xx controllers have a second RS485 port called FCOM.
- ● Each pressurized space will have its own FCOM bus. The FCOM ports of all controllers in a pressurized space should be connected, including the DXR2 with the room HVAC coordination application.
- ● The number of DXR2M devices on FCOM is determined by the number of remote room segments (CetRSegm). The maximum number is 5 remote room segments.
- ● A single pressurized space may include up to 5 Fume Hoods (1 segment each) if there are no remote room segments.
- ● DXR2.M17C handles 1 room segment. DXR2.M17CX handles 2 room segments.
- ● BACnet addresses for controllers in the pressurized space should be contiguous.
- ● Max Master must be 30 or less.
- ● The exception to the 5 remote segment limit is if the MSTP network is dedicated to the single pressurized space, either with connection at a field panel or with a router. In this case, the limit is 8. The BACnet addresses must be contiguous with the max master set to the highest address, <= to 8.
- /
- Fig. 72: Lab MS/TP with Fume Hoods
- /
- Fig. 73: Lab MS/TP - Common Pressurized Space
- /
- Fig. 74: Lab MSTP – Combination Multi-room and Fume Hoods
- On CET MS/TP automation stations (DXR2.M17x), the data collected over the F-COM (flow communication) network communicates data related to air supplied and exhausted in and out of the room, including supply terminal(s), extract terminal(s), and fume hood(s). This separate, dedicated network is needed because the standard BACnet MS/TP network is occupied with other network traffic. FCOM handles airflow related data necessary for dynamic room pressurization changes.
- Multiple fume hood flows are totaled by the CetRCtl group master object. The result is displayed in the object for Room fume hood air volume flow (AirFlFhR) located in the pressure control AF (CetAirFlTck11 or CetPFlCas11).
- The following figure provides a simplified view of F-COM network only. The standard BACnet MS/TP network wiring is not shown.
- /
- Fig. 75: FCOM connection for DXR2.M17C…
- Room automation stations are connected to one another using switches and Ethernet cables with RJ45 connectors. For more information on interconnection between controllers see, Dual Port Ethernet Controller Topology Basics [➙ 30].
- NOTE:For critical environment DXRs with fume hood controls, all controllers in a pressurized space must be on a common switch. See the Pressurized Rooms with Fume Hoods and Lab DXR2 Networking Examples section for optional configurations.
- /
- Fig. 76: Dual Ethernet Connection Using Up to 90 m Solid Copper Cable and Jack Boxes.
- /
- Fig. 77: Dual Ethernet Connection Using Up to 30m Stranded Copper Patch Cables.
- For Critical Environment DXRs in a pressurized space:
- ● The DXR2.E controllers may be in a star configuration, a daisy chain configuration or a daisy chain with loop back and RSTP.
- – The daisy chain may include up to 20 devices (room or fume hood).
- ● All controllers in a pressurized space must be on a common switch.
- ● Multiple pressurized spaces can be in the daisy chain and on the same switch.
- ● If doing RSTP, loop back to the same switch. The standard DXR documentation shows the loop back with different switches.
- ● A single pressurized space may include up to 20 Fume Hoods (1 exhaust each), and should not exceed 16 supply and extracts. NOTE: DXR2.C handles 1 supply and 1 extract. DXR2.CX handles 2 supplies and 2 extracts.
- ● The controller running the room HVAC coordination application should be a C (1 room segment) when more than two supply/extract tracking pair and 8 fume hoods are in the pressurized space.
- Lab DXR2 Networking Examples
- /
- Fig. 78: Lab DXR2 network - Daisy chain
- /
- Fig. 79: Lab DXR2 network - Star
- /
- Fig. 80: Lab DXR2 network - Ring
- /
- Fig. 81: Lab DXR2 network - Daisy chain
- ● Two rooms daisy chained with RSTP
- ● Room integrity maintained
- /
- Fig. 82: Lab DXR2 network – RSTP
- ● Not supported
- ● RSTP configuration: Rm 101 is exposed to network traffic due to second switch
- ● Room integrity not maintained
- /
- Fig. 83: Lab DXR2 network – RSTP
- ● Not supported
- ● RSTP using two switches
- /
- Fig. 84: Lab DXR2 network - Star
- ● Supported
- ● Dedicated switch port for each Lab DXR2
- /
- Fig. 85: Lab DXR2 network - Star
- ● Dedicated switch port for each Lab DXR
- ● Room integrity maintained
- /
- Fig. 86: Lab DXR2 network - Star
- ● Not supported
- ● Star configuration: Rm 101 is exposed to network traffic due to second switch
- ● Room integrity not maintained
- /
- Fig. 87: Lab DXR2 network – Daisy chain
- ● Not recommended
- ● Single DXR2 failure could affect multiple rooms (depends on device location)
- SCOM provides dedicated digital sensor communication.
- ● Star topology for 24Vac wiring (incl. 0..10V signal)
- ● Diameter of 24Vac wire is a limiting factor for the distance between controller and sensor
- ● SCOM must be wired in Line topology. SCOM is an RS-485 communication any cable for BACnet/MSTP could be used (e.g. Belden 9925). It is also allowed to use a 2 x 2-wire twisted pair to wire back and forth for cable saving purpose and for installing the terminators in the controller enclosure (e.g. J-Y(St)Y 2x2x0.8 or KNX cable)
- ● Consider 120 Ohm terminators on the two ends in case the total SCOM length is > 30m /100ft
- ● Additional terminals needed at the controller for SCOM and 24 Vac wiring
- ● 3 cables are connected to the sensor (2 Knock-outs available at the DXA.S04P1-B)
- /
- Fig. 88: SCOM connection for DXR2.x17C...
- Lab DXR power, signal and communications to two/four APS with Actuator in IP54 box
- ● Maximum cable distance between DXR enclosure and APS and Actuator limited by 24 Vac
- – 80 m (260 ft) on 14 AWG wire
- – 50 m (164 ft) on 16 AWG wire
- ● For IP54 splash proof box orientate power/signal and SCOM conduits facing down
- – Actuator cable run through side conduit connection
- – Signal cable from Lab DXR to APS Y and U
- Dedicated 18 AWG twisted pair
- Run in same 4 conductor twisted cable as 24 Vac
- – SCOM run in line topology from Lab DXR to each APS maximum cable length 800 m (2600 ft)
- Two MSTP cables with reference wire
- One data cable with two pairs using APS reference impedance in place of reference wire
- /
- Fig. 89: DXR2.x17C... wiring of Sensor/Actuator with two ducts, central transformers, line topology for SCOM.
- /
- Fig. 90: DXR2.x17CX.. wiring of Sensor/Actuator with four ducts, central transformers, line topology for SCOM.
- KNX PL-Link distances within the APOGEE Automation system are typically short and not subject to large electrical noise. It is recommended to use 20 AWG solid copper unshielded twisted pair cables; however, the drain wire must not be connected. Substitute 18 AWG solid copper shielded twisted pair cable where long wire runs make voltage drop a concern. Use CMP where plenum rating is required.
- /
- Fig. 91: Connecting KNX PL-Link.
- /
- Fig. 92: KNX PL-Link Device Termination.
- NOTE: The operating supply voltage range for the KNX/PL-Link is DC 21 through 30V.DXR2 supplies 50 mA that may not be shared. To obtain more power, shut off the DXR2 KNX/PL-Link supply and connect up to eight JB125C23 KNX power supplies.The devices receive power from the connected room automation station using the KNX PL-Link Terminals +11 and –12. Calculate the voltage drop using cable resistance in Power Trunk Layout [➙ 72]. All devices must have a minimum input of DC 21V.
- KNX/PL-Link Interface Power Consumption (From Room Automation Station).
- Maximum mA at DC 24V
- Description
- Part Number
- 7.5
- Wall Temperature Sensor with Switches
- QMX3.P02
- 7.5
- Wall Temperature Sensor Only
- QMX3.P30
- 7.5
- Wall Temperature Sensor with Display
- QMX3.P34
- 10
- Wall Temperature Sensor with Switches and Display
- QMX3.P37
- 7.5
- Wall Temperature/RH/ Sensor without Display
- QXM3.P40
- 15
- Wall Temperature/RH/C02 Sensor
- QMX3.P70
- 15
- Wall Temperature/RH/C02 Sensor with Display
- QMX3.P74
- 8
- Fume Hood Operating Display Panel
- QMX3.P87
- 8
- Fume Hood Operating Display Panel (Thin)
- QMX3.P88
- 10
- Binary Input (4x)
- JB260C23
- 10
- Binary Output (2x Relay)
- JB510C23
- 10
- Switching Actuator (1x 20 A Relay)
- JB512C23
- 10
- Binary Output (3x Relay)
- JB513C23
- 10
- Solar Protection (1x Actuator)
- JB520C23
- 10
- Solar Protection (2x Actuator)
- JB521C23
- 10
- Universal 120V Dimmer
- JB525C23
- (80 … 640)
- KNX Power Supply 80 mA at DC 2VAC 120V, 50 through 60 Hz (maximum eight on Bus)
- JB125C23
- /
- Fig. 93: Power Trunk Connection to ATEC.
- BACnet ATEC or N-Variant P1 ATEC (Updated Hardware) Power Source Requirements.
- Maximum Power1) 2) 3)
- Line Frequency
- Input Voltage
- Product
- 5 VA + DO loads
- 50/60 Hz
- 24 Vac
- BACnet Actuator
- Total VA rating is dependent upon the controlled DO loads (for example, actuators, contactors, and so on) and is limited to 12 VA per DO.
- 1)
- Smoke control listed ATECs are limited to 6 VA max per DO.
- 2)
- Do not control more than the nameplate rated loads for DOs of the electronic output controllers. The controller UL and CSA listing is based on the nameplate power rating.
- 3)
- BACnet Actuator Wiring Diagrams
- /
- Fig. 94: ATEC VAV with Electric Heat and Fan.
- /
- Fig. 95: ATEC VAV with Hot Water Reheat, Fan and Spare DO.
- /
- Fig. 96: ATEC Wiring for DI2/AI3.
- /
- Fig. 97: ATEC Wiring for A13/A14/AO.
- Earth Ground Reference
- The earth ground reference for all field panels and equipment controllers must be supplied via a third wire run, with the AC power source providing power to that cabinet. All AC power sources must be bonded per NEC 250 unless isolation is provided between the cabinets.
- For more information, see the Equipment Grounding System Requirements [➙ 17] section of this manual.
- BACnet PTEC or N-Variant P1 TEC (Updated Hardware) Power Source Requirements.
- Maximum Power1) 2) 3) 4)
- Line Frequency
- Input Voltage
- Product
- 3 VA + DO loads
- 50/60 Hz
- 24 Vac
- BACnet Equipment Controller (6 DO Platform)
- 7 VA + DO loads
- 50/60 Hz
- 24 Vac
- BACnet Equipment Controller (8 DO Platform)
- Total VA rating is dependent upon the controlled DO loads (for example, actuators, contactors, and so on) and is limited to 12 VA per DO.
- Smoke control listed ATECs are limited to 6 VA maximum per DO.
- Do not control more than the nameplate rated loads for DOs of the electronic output controllers. The controller UL and CSA listing is based on the nameplate power rating.
- For higher VA requirements, 110 or 220 Vac requirements, separate transformers used to power the load, or DC power requirements, use an interposing 220V 4-relay module (TEC Relay Module P/N 540-147).
- NOTE:See the Installation Instructions for point wiring diagrams.
- 6 DO Platform
- /
- Fig. 98: 6 DO Controller with 1 DI, 1 DI/AI-T.
- /
- Fig. 99: 6 DO Controller with 1 DI, 1 DI/AI-T, and Air Velocity Sensor.
- 8 DO Platform
- /
- Fig. 100: 8 DO Controller with 1 AI-V/I, 2 AI-T, 2 DI, and 3 AO-V.
- /
- Fig. 101: 8 DO Controller with 2 AI-V/I, 1A1-T, 2 DI, 3 AO-V, and 1 Air Velocity Sensor.
- /
- Fig. 102: 8 DO Controller with 1 AI-V/I, 2AI-T, 2 DI, 3 AO-V, and 1 Air Velocity Sensor.
- /
- Fig. 103: 8 DO Controller with 2 AI-V/I, 1 AI-T, 2 DI, 3 AO-V, and 2 Air Velocity Sensors.
- /
- Fig. 104: 8 DO Controller with 2 AI-V/I, 1AI-T, 2 DI, 3 Fast AO-V, and 2 Offboard Air Velocity Sensor Inputs.
- Appendix A – Discontinued Products
- Modular Equipment Controller (MEC) and Point Expansion Module (PXM)
- MEC Service Boxes
- Modular Building Controller/Remote Building Controller (MBC/RBC)
- FLN Controller
- Stand-alone Control Unit (SCU)
- Network Devices
- Multi-Point Unit/Digital Point Unit (MPU/DPU)
- Terminal Equipment Controller—Pneumatic Output, Low Voltage
- Terminal Equipment Controllers—Pneumatic Output
- Pneumatic Output Controller
- LonMark® Terminal Equipment Controller (LTEC)
- Wire Type Requirements
- Power Source Requirements
- LTEC Wiring Diagrams
- Terminal Control Unit (TCU)
- Unitary Controller (UC)
- Terminal Equipment Controllers (APOGEE Legacy Controllers)
- BACnet Terminal Equipment Controllers (BTEC) (Legacy Hardware)
- The following products are no longer available for new sales; this information is for reference only.
- MEC, MEC with LON, and PXM Points Wire Type Requirements.
- Conduit Sharing2
- Maximum Distance1
- Wire Type
- Class
- Circuit Type
- Check local codes
- See NEC
- No. 12 to No. 14 AWG THHN
- 1
- AC Line Power (120V or greater)
- Check local codes
- See NEC
- No. 12 to No. 18 AWG THHN
- 2
- AC Low Voltage Power
- Check local codes
- 750 ft (230 m)
- No.18 or No.22 AWG TP or TSP5 CM (FT4) or CMP (FT6)3
- 2
- Analog Input1K Ohm platinum RTD
- Check local codes
- 750 ft (230 m)
- No.18 or No.22 AWG TP or TSP5 CM (FT4) or CMP (FT6)3
- 2
- Analog Input0-10V
- Check local codes
- 750 ft (230 m)
- No.18 or No.22 AWG TP or TSP5 CM (FT4) or CMP (FT6)3
- 2
- Analog Input0-20 mA
- Check local codes
- 750 ft (230 m)
- No.18 or No.22 AWG TP or TSP5 CM (FT4) or CMP (FT6)3
- 2
- Analog Output0-10V
- Check local codes
- 750 ft (230 m)
- No.18 or No.22 AWG TP or TSP5 CM (FT4) or CMP (FT6)3
- 2
- Analog Output0-20 mA
- Check local codes
- 328 ft (100 m)
- 24 AWG UTP6, solid or stranded.
- 2
- Analog and Digital Inputs on SCS
- Check local codes
- 750 ft (230 m)
- No.14 to No.22 AWG. TP not required below 1 Hz. at faster pulse speeds, use TP or TSP5; check job specifications and local codes.
- 2
- Digital Input
- Check local codes
- Check local codes
- No.14 to No.22 AWG. TP not required; check job specifications and local codes.
- 1, 2
- Digital Output
- Check local codes
- 200 ft (61 m)
- No. 24 AWG TSPCM (FT4) or CMP (FT6)3
- 2
- MEC Point EXP Bus4
- Wire length affects point intercept entry. Adjust intercept accordingly.
- Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except where local codes permit. (Both Class 1 and Class 2 wiring can be run in the field panel providing the Class 2 wire is UL listed 300V 75°C (167°F) or higher, or the Class 2 wire is NEC type CM (FT4) (75°C or higher) or CMP (FT6) (75°C or higher). NEC type CL2 and CL2P is not acceptable unless UL listed and marked 300V 75°C (167°F) or higher.
- Twisted pair, non-jacketed, UL listed 75°C (167°F) and 300V cable can be used in place of CM (FT4) or CMP (FT6) (both must be rated 75°C or higher) cable when contained in conduit per local codes. See the Field Purchasing Guide for wire.
- All point blocks wired to an MEC must be daisy-chained. The total wire length from the MEC to the last point block in the chain must be no longer than 200 ft (61 m). Unlike BLN connections, shield wires to the point blocks must be terminated at both ends.
- Twisted Shielded Pair TSP is not required, does not affect MEC specifications, and may be substituted where otherwise specified. TSP should be used in areas of high electrical noise (for example when in proximity to VFDs and 100 kVa or larger motors). Where used, connect the shield drain wire to the MEC Shield terminals or equivalent grounding system inside enclosure.
- Cable must be part of a Structured Cabling System (SCS).
- NOTE:UL-recognized wire (labeled with a backwards “RU”) is not field-installable. Use only UL-listed wire.For analog inputs, termination for shield is provided, if required. Termination for shield is not provided for digital inputs. For more information, see the wiring diagrams.
- Power Source Requirements for MEC.
- Maximum Power 1,2
- Line Frequency
- Input Voltage
- Product
- 35 VA
- 50/60 Hz
- 24 Vac
- MEC
- 50 VA
- 50/60 Hz
- 24 Vac
- MEC with FLN
- 50 VA
- 50/60 Hz
- 24 Vac
- L model MEC
- 14 VA
- 50/60 Hz
- 24 Vac
- MEC Digital Point Block, 4 DI, 4 DO
- 18 VA
- 50/60 Hz
- 24 Vac
- MEC Digital Point Block, 8 DI, 4 DO
- 20 VA
- 50/60 Hz
- 24 Vac
- MEC Analog Point Block, 4 AI, 4 AO
- 18 VA
- 50/60 Hz
- 24 Vac
- MEC Analog Point Block, 8 AI
- 18 VA
- 50/60 Hz
- 24 Vac
- Point Expansion Module
- 200 VA3
- 50/60 Hz
- 192 VA
- PX Series Service Box – 192 VA
- 175 VA
- 50/60 Hz
- 384 VA
- PX Series Service Box – 384 VA
- The 24V wiring is Class 2. It draws less than 50 watts of power. AC power uses Class 1 wire.
- An external connection is provided for power at 24 Vdc at 50 mA per termination (200 mA maximum all terminations) for external sensors.
- Service outlets are restricted to only continuously power network devices.
- Analog Input Powered Devices
- Approved sensors drawing less than 25 mA can be powered by the MEC analog input (AI) connections. Sensors requiring more power must be powered by an external source. The external source can be connected to the same AC line as the MEC power supply as long as it is only used to power low voltage devices (less than 30 volts).
- Analog Output Powered Devices
- The PX Series Service Box provides a 24 Vac 100 VA total power source to any auxiliary device via a two-wire connection (L, N).
- One of the options for powering the MEC, point blocks, and 24V devices is the PX Series Service Box.
- See PX Series Service Box in this chapter for more information.
- All point blocks wired to an MEC must be daisy-chained. The total wire length from the MEC to the last point block in the chain must be no longer than 200 ft (61 m).
- NOTE:Unlike BLN connections, shield wires to the point blocks must be terminated at both ends.
- Table Number of MECs Allowed on a Single Three-Wire Circuit shows the number of MECs allowed on a single three-wire (ACH, an ACN, and Earth Ground) circuit, if local code permits.
- Number of MECs Allowed on a Single Three-Wire Circuit.
- Maximum Values for Evenly Spaced Loads
- Maximum Values for Concentrated Loads
- Circuit Breaker Size1
- MEC
- Length2
- MEC
- Length2
- 7/10
- 100 ft (30.48 m)
- 7/10
- 75 ft (22.87 m)
- 15 amp (No.14 AWG THHN)
- 7/10
- 130 ft (40.63 m)
- 7/10
- 115 ft (35.06 m)
- 20 amp (No.12 AWG THHN)
- Assumes minimum voltage of 102 Vac at circuit breaker and 5 Vac maximum voltage drop (97 Vac at loads). See Class 1 power trunk information in the Wire Specification Tables section of Chapter 1.
- Conduit length from MEC to MEC.
- For MECs, MOVs must be used across the DO terminals when connected to loads in all cabinets. MOVs are factory-installed on all DOs in MECs. See the section Controlling Transients [➙ 24] for MOV part numbers.
- When installing MOVs across the DO relay contacts on termination boards, keep the MOV leads as short as possible. This makes the MOV more effective in reducing spikes from field wiring or controlled devices. Remove and reinstall any MOVs with leads longer than 1 to 11/2 in. (25.4 mm to 38.1 mm).
- Line Voltage Receptacle
- V150LA20A MOVs are factory-installed on all MEC 115V service box receptacles.
- Diagram
- Specifics
- Point Type
- Figure 71
- 4-20 mA, 2-wire
- Analog Input
- Figure 72
- 4-20 mA, externally powered
- Figure 73
- 4-20 mA, 3-wire, internally powered
- Figure 74
- 0-10 Vdc, externally powered
- Figure 75
- 0-10 Vdc, internally powered
- Figure 76
- 1000 Ohm platinum RTD
- Figure 77
- 4-20 mA
- Analog Output
- Figure 78
- 0-10 Vdc
- Figure 79
- Dry contacts
- Digital Input
- Figure 80
- Pulse accumulating
- Figure 81
- Pulsed or latched
- Digital Output
- Figure 82
- Universal Input
- WARNING
- All transformer or isolated power supply secondary neutrals requiring connection to earth ground must be directly connected to an approved building earth ground terminal located at the point termination module where the signal is terminated.
- This is represented in the following diagrams by “E” at the earth ground symbol.
- /
- Fig. 105: Connecting a 2-Wire Analog Input (4 to 20 mA).
- /
- Fig. 106: Connecting an Externally Powered Analog Input (4 to 20 mA).
- /
- Fig. 107: Connecting an Internally Powered 3-Wire Analog Input (4 to 20 mA).
- /
- Fig. 108: Connecting an Externally Powered Analog Input (0 to 10 Vdc).
- /
- Fig. 109: Connecting an Internally Powered Analog Input (0 to 10 Vdc).
- /
- Fig. 110: Connecting an Analog Input (1000 ohm Platinum RTD).
- /
- Fig. 111: Connecting an Analog Output (4 to 20 mA).
- /
- Fig. 112: Connecting an Analog Output (0 to 10 Vdc).
- /
- Fig. 113: Connecting a Digital Input (Dry Contacts).
- A single common may be used for all digital inputs.
- Excitation equals 24 Vdc at 22 mA. Pulse rate equals 10 Hz.
- Dry contact only. Does not require gold contacts.
- Solid state device must be rated for 30V minimum, with RDS on less than 1K ohms and RDS off greater than 100K ohms
- /
- Fig. 114: Connecting a Digital Input (Pulse Accumulating).
- /
- Fig. 115: Connecting a Digital Output (Pulsed or Latched).
- To use an AI as a DI, wire the device as follows:
- 1. Wire a 1/2-Watt, 3.3K-ohm resistor between the 24 Vdc sensor supply and the dry contact to be monitored. (See the following Figures.)
- 2. Wire the other side of the dry contact into the signal terminal of an AI point.
- 3. In parallel to the first 3.3K-ohm resistor, wire a second 3.3K-ohm resistor.
- 4. Set the jumper for the corresponding AI to current.
- 5. Define the point in the Firmware as an LDI.
- /
- Fig. 116: MEC Wiring Diagram to use an AI as a DI.
- /
- Fig. 117: PXM Wiring Diagram to use an AI as a DI.
- One of the options for powering the TX-I/O, PXC Compact, MEC, point blocks, and 24V devices is the Service Box.
- CAUTION
- Do not connect inductive loads, such as drill motors, vacuum cleaners, or compressors, to the duplex receptacle on the 115V Service Box.
- Service Box Source Requirements and Outputs
- Class 2
- Total 1
- 60 VA
- 175 VA
- 2A2
- 1.8A
- 50/60 Hz
- 115 Vac
- 115V 175VA
- 60 VA
- 175 VA
- N/A
- 0.9A
- 50/60 Hz
- 230 Vac
- 230V 175VA
- Total 24 Vac Output Power is distributed to both Class 1 Power Limited Terminations for use inside the enclosure only and a Class 2 Termination which may be used outside the enclosure.
- Service outlets (115 Vac only) are restricted to continuously powered network devices (0.5A) and reserved power for laptop computers (1.5A). Plan Branch circuit for an additional 2A per 115 Vac 24 Vac Service Box.
- The table Number of MECs Allowed on a Single Three-Wire Circuit shows the number of MECs allowed on a single three-wire (ACH, an ACN, and Earth Ground) circuit, if local code permits.
- Number of MECs Allowed on a Single Three-Wire Circuit.
- Maximum Values for Evenly Spaced Loads
- Maximum Values for Concentrated Loads
- Circuit Breaker Size 1
- Length 2
- Length 2
- 7/10
- 100 ft (30.48 m)
- 7/10
- 75 ft (22.87 m)
- 15 amp (No.14 AWG THHN)
- 7/10
- 130 ft (40.63 m)
- 7/10
- 115 ft (35.06 m)
- 20 amp (No.12 AWG THHN)
- Assumes minimum voltage of 102 Vac at circuit breaker and 5 Vac maximum voltage drop (97 Vac at loads). See Class 1 power trunk information in the Wire Specification Tables section of Chapter 1.
- Conduit length from Service Box to Service Box.
- Standard source power is 115 Vac. The high-voltage supply enters the enclosure from the top through the right-hand side conduit knockout. The source voltage of the MEC must be current limited to 20 amps or less (15 amps or less for Smoke Control), depending on the requirements of any particular installation.
- Two pigtails and grounding studs are provided under the wire cover for easy connection by the electrician. The pigtails come from the factory pre-wired to the transformer through a single pole On/Off switch and circuit breaker. The duplex receptacle is not switched. MOVs (3 x 150V) are installed on input power.
- Low voltage is routed from the transformer and supplies 24 Vac power at 175VA maximum. (The power source to the Service Box must be current limited to 15 amps or less.) The CTLR, POINT BLOCKS connector is rated at 100 VA. The 24V ACTUATOR connector is rated Class 2 and limited to 60 VA. A MOV (30V) is installed on 24 Vac side of transformer.
- /
- Fig. 118: Wiring Diagram for 115V MEC Service Box.
- DANGER
- Possible shock hazard!
- The power switch disables power to the control side of the MEC only. Power remains ON at the duplex receptacle (115V version) and in the service box. Power may be present at the field devices. To avoid injury, follow proper safety precautions.
- The 230V Service Box is also available for applications where source power is 230 Vac. The high-voltage supply enters the enclosure from the top through the right-hand side conduit knockout. The source voltage of the MEC must be current limited to 10 amps or less, depending on the requirements of any particular installation.
- A termination block for power and ground termination is provided on the wire cover for easy connection by the electrician. The termination block comes from the factory pre-wired to the transformer through a double pole On/Off switch and circuit breaker. MOVs (3 x 275V) are installed on input power.
- Low voltage is routed from the transformer and supplies 24 Vac power at 175 VA maximum. The CTLR, POINT BLOCKS connector is rated at 100 VA. The 24V ACTUATOR connector is rated Class 2 and limited to 60 VA. A MOV (30V) is installed on the 24 Vac side of the transformer.
- /
- Fig. 119: Wiring Diagram for 230V Service Box.
- Service Box Earth Grounding Transfer 24 Vac Neutral
- The service box has a floating neutral system, which when required must be connected to the building approved earth ground, as follows:
- /
- Fig. 120: MEC Service Box Common Grounding.
- DANGER
- The Transformer Secondary Neutral (N) must be connected to the building approved earth ground whenever transformer primary is greater than 150 Vac.
- MBC/RBC Wire Type Requirements.
- Conduit Sharing2
- Maximum Distance1
- Wire Type4
- Class
- Circuit Type
- Check local codes
- See NEC*
- No. 12 to No. 14 AWG THHN
- Power
- AC Line Power
- Check local codes
- Check local codes
- No. 14 to No. 22 AWGTP not required, check job specifications and local codes
- 1, 2
- Digital Output
- Check local codes
- 750 ft (230 m)
- No. 14 to No. 22 AWGTP not required, check job specifications and local codes
- 2
- Digital Input
- Check local codes
- 750 ft (230 m)
- No. 14 to No. 22 AWGTP not required, check job specifications and local codes
- 1, 2
- High VoltageDigital Input
- Check local codes
- 750 ft (230 m)
- No. 20 AWG TP or TSP3CM (FT4) or CMP (FT6)
- 2
- Analog Input1k Nickel or Platinum
- Check local codes
- 750 ft (230 m)
- No. 18 to No. 20 AWG TP or TSP3 CM (FT4) or CMP (FT6)
- 2
- Analog Input, Thermistor
- Check local codes
- 750 ft (230 m)
- No. 18 to No. 20 AWG TP or TSP3 CM (FT4) or CMP (FT6)
- 2
- Analog Input, 0-10V
- Check local codes
- 750 ft (230 m)
- No. 18 to No. 20 AWG TP or TSP3 CM (FT4) or CMP (FT6)
- 2
- Analog Input, 4-20 mA
- Check local codes
- 750 ft (230 m)
- No. 18 to No. 20 AWG TP or TSP3 CM (FT4) or CMP (FT6)
- 2
- Analog Output, 0-10V
- Check local codes
- 750 ft (230 m)
- No. 18 to No. 20 AWG TP or TSP3 CM (FT4) or CMP (FT6)
- 2
- Analog Output, 4-20 mA
- Check local codes
- 328 ft (100 m)
- 24 UTP4, solid or stranded
- 2
- Analog and Digital on SCS
- National Electric Code.
- Wire length affects point intercept entry. Adjust intercept accordingly.
- Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except where local codes permit. Both Class 1 and Class 2 wiring can be run in the field panel providing the Class 2 wire is UL-listed 300V 75°C (167°F) or higher, or the Class 2 wire is NEC type CM (FT4)(75°C or higher) or CMP (FT6) (75°C or higher). NEC type CL2 and CL2P is not acceptable unless also UL listed and marked 300V 75°C (167°F) or higher.).
- Twisted Shielded Pair TSP is not required for general installation, does not affect MBC/RBC specifications, and may be substituted where otherwise specified. TSP should be used in areas of high electrical noise (for example when in proximity to VFDs and 100 kVa or larger motors). Where used, connect the shield drain wire to the grounding system inside enclosure.
- Cable must be part of a Structured Cabling System (SCS).
- NOTE:UL-recognized wire (labeled with a backwards “RU”) is not field-installable. Use only UL-listed wire.
- Power Source Requirements for MBC/RBC
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 200 VA4
- 50/60 Hz
- 115 Vac
- MBC 24/40 – 115V
- 175 VA
- 50/60 Hz
- 230 Vac
- MBC 24/40 – 230V
- 150 VA4
- 50/60 Hz
- 115 Vac
- RBC – 115V
- 135 VA
- 50/60 Hz
- 230 Vac
- RBC – 230V
- 6 VA
- 50/60 Hz
- 24 Vac ±20%
- Power Open Processor
- 5 VA
- 50/60 Hz
- 24 Vac ±20%
- Open Processor
- 5 VA
- 50/60 Hz
- 24 Vac ±20%
- Power Module
- .25 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2P1K
- .35 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2N100K
- .20 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2U10
- 2.2 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2I420
- .75 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2D201
- 3 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.4D20
- .75 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2D250
- .75 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2C
- 3.2 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Y102
- 3.2 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Y10S
- 3.2 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Y10-M3
- 3.2 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Y10S-M
- 3.5 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Y420
- 2.0 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.1PSI20-M
- 2.6 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Q250
- 2.6 VA
- 50/60 Hz
- 24 Vac ±20%
- PTM6.2Q250-M
- PTM6.2D20 is no longer available.
- PTM6.2Y10 has been replaced by the PTM6.2Y10S; however, both are still in use.
- PTM6.2Y10M has been replaced by the PTM6.2Y10S-M; however, both are still in use.
- Cable must be part of a Structured Cabling System (SCS).
- Analog Input Powered Devices
- Approved sensors drawing less than 50 mA can be powered by the MBC/RBC analog input (AI) connections. Sensors requiring more power must be powered by an external source. The external source can be connected to the same AC line as the MBC/RBC power supply as long as it is only used to power low voltage devices (less than 30 volts).
- Analog Output Powered Devices
- No analog output devices can be powered by the MBC/RBC analog outputs.
- High voltage (and other non-Class 2) Point Termination Modules (PTMs) must be placed in the upper right module slots of the field panel. All other PTMs must be placed on either the left rail of the field panel or below the high voltage modules.
- The following table shows the number of MBC/RBCs allowed on a single three-wire (ACH, an ACN, and Earth Ground) circuit if local code permits.
- Number of MBCs/RBCs Allowed on a Single Three-Wire Circuit.
- Maximum Values for Evenly Spaced Loads
- Maximum Vales for Concentrated Loads
- Circuit Breaker Size1
- MBC/RBC
- Length2
- MBC/RBC
- Length2
- 7/10
- 100 ft(30.48 m)
- 7/10
- 75 ft(22.87 m)
- 15 amp (No.14 AWG THHN)
- 7/10
- 130 ft(40.63 m)
- 7/10
- 115 ft(35.06 m)
- 20 amp (No.12 AWG THHN)
- Assumes minimum voltage of 102 Vac at circuit breaker and 5 Vac maximum voltage drop (97 Vac at loads). See Class 1 power trunk information in the Wire Specification Tables section of Chapter 1.
- Conduit length from MBC/RBC to MBC/RBC.
- Line Voltage Receptacle
- V150LA20A MOVs are factory-installed on all MBC/RBC service box receptacles.
- /
- Fig. 121: 115 Vac MBC/RBC Service Box Wiring Diagram.
- /
- Fig. 122: 230 Vac MBC/RBC Service Box Wiring Diagram.
- This section contains information on wiring Point Termination Modules (PTMs).
- MOVs are not required for any MBC/RBC Point Termination Modules.
- The Table PTM Wiring Diagram Reference summarizes PTM applications. Since most PTMs can have multiple uses, the table is divided into applications and a specific wiring diagram is referenced.
- To use the information in Table PTM Wiring Diagram Reference:
- 1. Determine the point type of the application.
- 2. Determine how that point type is used in relation to the piece of equipment you are controlling.
- 3. Review the table and find the appropriate PTM and corresponding wiring diagram.
- Example
- A wiring diagram is needed for a 100K ohm thermistor.
- 1. A 100K ohm thermistor is a Logical Analog Input. See the Point Type column in Table PTM Wiring Diagram Reference and locate the Logical Analog Input section.
- 2. Find the entry in the Specifics column that identifies a 100K ohm thermistor.
- 3. In the PTM Qty and PTM Type columns, the quantity and type of PTM recommended for use with this application are identified: one half of a 2N100K. In the Diagram column, the wiring diagram for the application is identified. See Figure Connecting an Analog Input (Thermistor).
- PTM Wiring Diagram Reference.
- Diagram
- PTM Type
- PTM Qty
- Specifics
- Point Type
- Connecting an External Powered 3-Wire Analog Input (4 to 20 mA)
- 2I420
- 1/2
- 4-20 mA, 3-wire (externally powered)
- Logical Analog Input 1 – AI
- Connecting an External Powered 3-Wire Analog Input (0 to 10 Vdc)
- 2U10
- 1/2
- 0-10 Vdc, 3-wire (externally powered)
- Connecting an Analog Input (Thermistor)
- 2N100K
- 1/2
- 100K ohm thermistor
- Connecting an Analog Input (1000 ohm Platinum RTD)
- 2P1K
- 1/2
- 1000 ohm platinum RTD
- Connecting to a Full-Featured Sensor (P/N 544-780)
- Connecting to a full-featured sensor
- Connecting an Analog Output (0 to 10 Vdc)
- 2Y10
- 1/2
- 0-10 Vdc
- Logical Analog Output 1 – AO
- Connecting an Analog Output (4 to 20 mA)
- 2Y420 or 2Y10M
- 1-1/2 or 1/2
- 4-20 mA
- Connecting a Digital Input (Dry Contacts)
- 4D20
- 1
- Dry contacts, 4 points
- Logical Digital Input 1 – DI
- Connecting a Digital Input (Voltage Sensing)
- 2D250
- 1
- Voltage sensing
- High and low voltage cannot be combined on the same PTM.
- Connecting a Digital Input (Pulse Accumulation)
- 2C
- 1
- Pulse accumulating for counting pulses initiated by dry contact.
- Logical Pulsed Accumulator1 – DI (Counting)
- Connecting a Digital Output (Latched or Pulsed)
- 2Q250 or 2Q250-M
- 1 or 1
- DO latched or pulsed
- Logical Digital Output1 – DO
- High and low voltage cannot be combined on the same PTM.
- A 2Q250-M PTM must have 24 Vac voltage fed into the M-Bus.
- Circuits powering PTM6.2Q50-M point modules must be limited by a 15-amp (max.) circuit breaker.
- Connecting an LFSSL (No Proof)
- 2Q250
- 1
- LFSSL (no proof)
- Logical FAST/SLOW/ STOP Latched Control1 – DO (OFF/Fast)1 – DO (OFF/SLOW)1 – DI (Proof)
- Connecting an LFSSL (Proof of Contact)
- 2Q250
- 1
- LFSSL (proof of contact)
- 2D20, or4D20
- 1/2, or1/4
- Connecting an LFSSL (Proof of Voltage)
- 2Q250
- 1
- LFSSL (proof of voltage)
- 2D250
- 1/2
- Connecting an LFSSP (No Proof)
- 2Q250
- 1-1/2
- LFSSP (no proof)
- Logical FAST/SLOW/STOP Pulsed Control1 – DO (OFF)1 – DO (FAST)1 – DO (SLOW)1 – DI (Proof)
- Connecting an LFSSP (Proof of Contact)
- 2Q250
- 1-1/2
- LFSSP (proof of contact)
- 2D20, or4D20
- 1/2, or1/4
- Connecting an LFSSP (Proof of Voltage)
- 2Q250
- 1-1/2
- LFSSP (proof of voltage)
- 2D250
- 1/2
- Connecting an LOOAL (No Proof)
- 2Q250
- 1
- LOOAL (no proof)
- Logical ON/OFF/AUTO Latched Control1 – DO (ON/OFF)1 – DO (AUTO)1 – DI (Proof)
- Connecting an LOOAL (Proof of Contact)
- 2Q250
- 1
- LOOAL (proof of contact)
- 2D20, or4D20
- 1, or1/2
- Connecting an LOOAL (Proof of Voltage)
- 2Q250
- 1
- LOOAL (proof of voltage)
- 2D250
- 1/2
- Connecting an LOOAP (No Proof)
- 2Q250
- 1-1/2
- LOOAP (no proof)
- Logical ON/OFF/AUTO Pulsed Control1 – DO (ON)1 – DO (OFF)1 – DO (AUTO)1 – DI (Proof)
- Connecting an LOOAP (Proof of Contact)
- 2Q250
- 1-1/2
- LOOAP (proof of contact)
- 2D20, or4D20
- 1/2, or1/4
- Connecting an LOOAP (Proof of Voltage)
- 2Q250
- 1-1/2
- LOOAP (proof of voltage)
- 2D250
- 1/2
- Connecting an L2SL (No Proof)
- 2Q250, or2Q250-M
- 1/2, or1/2
- L2SL (no proof)
- Logical Two-State Latched1 – DO (ON/OFF)1 – DI (Proof)
- Connecting an L2SL (Proof of Contact)
- 2Q250, or2Q250-M
- 1/2, or1/2
- L2SL (proof of contact)
- 2D20, or4D20
- 1/2, or1/4
- Connecting an L2SL (Proof of Voltage)
- 2Q250, or2Q250-M
- 1/2, or 1/2
- L2SL (proof of voltage)
- 2D250
- 1/2
- High and low voltage cannot be combined on the same PTM.
- A 2Q250-M PTM must have 24 Vac voltage fed into the M-Bus.
- Circuits powering PTM6.2Q50-M point modules must be limited by a 15-amp (max.) circuit breaker.
- Connecting an L2SP (No Proof)
- 2Q250
- 1
- L2SP (no proof)
- Logical Two-State Pulsed1 – DO (ON)1 – DO (OFF)1 – DI (Proof)
- Connecting an L2SP (Proof of Contact)
- 2Q250
- 1
- L2SP (proof of contact)
- 2D20, or4D20
- 1/2, or1/4
- Connecting an L2SP (Proof of Voltage)
- 2Q250
- 1
- L2SP (proof of voltage)
- 2D250
- 1/2
- WARNING
- All transformer or isolated power supply secondary neutrals requiring connection to earth ground must be directly connected to an approved building earth ground terminal located at the point termination module where the signal is terminated.
- This is represented in the following diagrams by “E” at the earth ground symbol.
- /
- Fig. 123: Connecting an External Powered 3-Wire Analog Input (4 to 20 mA).
- /
- Fig. 124: Connecting an External Powered 3-Wire Analog Input (0 to 10 Vdc).
- /
- Fig. 125: Connecting an Analog Input (Thermistor).
- /
- Fig. 126: Connecting an Analog Input (1000 ohm Platinum RTD).
- /
- Fig. 127: Connecting to a Full-Featured Sensor (P/N 544-780).
- WARNING
- Some I/O module terminal blocks are labeled with a 24 Vac power requirement designation.
- The 24 Vac supply is not intended for use to power external devices (for example transducers). If this 24 Vac is used to power external devices, the operational capabilities of other modules in the MBC/RBC can be affected.
- /
- Fig. 128: Connecting an Analog Output (0 to 10 Vdc).
- /
- Fig. 129: Connecting an Analog Output (4 to 20 mA).
- /
- Fig. 130: Connecting a Digital Input (Dry Contacts).
- 1. A single common may be used for all digital inputs on the same point termination module.
- 2. Excitation equals 22 Vdc at 8 mA. Pulse rate equals 25 Hz.
- 3. Dry contact only. Does not require gold contacts.
- 4. Solid state device must be rated for 30V minimum, with RDS on less than 200 ohms and RDS off greater than 50K ohms.
- WARNING
- High and low voltage cannot be combined on the same PTM.
- /
- Fig. 131: Connecting a Digital Input (Voltage Sensing).
- /
- Fig. 132: Connecting a Digital Input (Pulse Accumulating).
- WARNING
- - High and low voltage cannot be combined on the same PTM.- A 2Q250-M PTM must have 24 Vac voltage fed into the M-Bus.- Circuits powering a PTM6.2Q250-M must be limited by a 15-amp (max.) circuit breaker.
- /
- Fig. 133: Connecting a Digital Output (Latched or Pulsed).
- WARNING
- For points defined as LFSSL, DO NOT use the PTM6.2Q250-M.
- /
- Fig. 134: Connecting an LFSSL (No Proof).
- /
- Fig. 135: Connecting an LFSSL (Proof of Contact).
- /
- Fig. 136: Connecting an LFSSL (Proof of Voltage).
- WARNING
- For points defined as LFSSP, DO NOT use the PTM6.2Q250-M.
- /
- Fig. 137: Connecting an LFSSP (No Proof).
- /
- Fig. 138: Connecting an LFSSP (Proof of Contact).
- /
- Fig. 139: Connecting an LFSSP (Proof of Voltage).
- WARNING
- For points defined as LOOAL, DO NOT use the PTM6.2Q250-M.
- /
- Fig. 140: Connecting an LOOAL (No Proof).
- /
- Fig. 141: Connecting an LOOAL (Proof of Contact).
- /
- Fig. 142: Connecting an LOOAL (Proof of Voltage).
- WARNING
- For points defined as LOOAP, DO NOT use the PTM6.2Q250-M.
- /
- Fig. 143: Connecting an LOOAP (No Proof).
- /
- Fig. 144: Connecting an LOOAP (Proof of Contact).
- /
- Fig. 145: Connecting an LOOAP (Proof of Voltage).
- /
- Fig. 146: Connecting an L2SL (No Proof).
- /
- Fig. 147: Connecting an L2SL (Proof of Contact).
- /
- Fig. 148: Connecting an L2SL (Proof of Voltage).
- WARNING
- - For points defined as L2SP, DO NOT use the PTM6.2Q250-M.- High and low voltage cannot be combined on the same PTM.
- /
- Fig. 149: Connecting an L2SP (No Proof).
- /
- Fig. 150: Connecting an L2SP (Proof of Contact).
- /
- Fig. 151: Connecting an L2SP (Proof of Voltage).
- FLN Controller Wire Type Requirements.
- Conduit Sharing1
- Distance
- Wire Type
- Class
- Circuit Type
- Check local codes
- See NEC
- No. 12 to No. 14 THHN
- Power
- AC Line Power
- Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except as noted for Digital Inputs where local codes permit.
- NOTE:UL-recognized wire (labeled with a backwards “RU”) is not field-installable. Use only UL-listed wire.
- Power Source Requirements for FLN Controller.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 12 VA1
- 50/60 Hz
- 115 Vac
- FLN Controller – 115V
- 12 VA1
- 50/60 Hz
- 230 Vac
- FLN Controller – 230V
- Service outlets are restricted to continuously power network devices only.
- Wire specified in the BLN, FLN (P1), and Point Expansion Trunk table in Chapter 1 can be used at any trunk speed.
- Line Voltage Receptacle
- MOVs are factory-installed on all FLN Controller receptacles.
- NOTE:The SCU is no longer available for new sales. Information in this section is for reference only.
- SCU Wire Type Requirements.
- Conduit Sharing1
- Distance
- Wire Type
- Class
- Circuit Type
- Check local codes
- See NEC
- No.12 to No.14 THHN
- Power
- AC Line Power
- Check local codes
- Check local codes
- Check local codes
- 1, 2
- Digital Output
- Class 1 and 2 (Check local codes)
- 750 ft(230 m)
- No.18 to No.22 TP 2CL2, CL2P, CM (FT4), or CMP (FT6)
- 2
- Digital Input
- Class 2 only
- 750 ft(230 m)
- No.18 to No.22 TP 2CL2, CL2P, CM (FT4), or CMP (FT6)
- 2
- Analog Input(4 to 10 mA, Thermistor, Voltage)
- 750 ft(230 m)
- No.18 to No.22 TP 2CL2, CL2P, CM (FT4), or CMP (FT6)
- Analog Output(4 to 10 mA or Voltage)
- Class 2 only
- 2
- Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except as noted for Digital Inputs and where local codes permit.
- Twisted pair, non-jacketed, rated 75°C and 300V cable can be used in place of CL2, CL2P, CM (FT4), or CMP (FT6) cable when contained in conduit per local codes. Both CM and CMP must be rated 75°C or higher. See the Field Purchasing Guide for wire.
- NOTE:UL-recognized wire (labeled with a backwards “RU”) is not field-installable. Use only UL-listed wire.
- Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 135 VA1
- 50/60 Hz
- 115 Vac
- SCU – 115V
- 135 VA1
- 50/60 Hz
- 230 Vac
- SCU – 230V
- Service outlets are restricted to only continuously power network devices.
- Analog Input Powered Devices
- Approved sensors drawing less than 50 mA can be powered by the SCU analog input (AI) connections. Sensors requiring more power must be powered by an external source. The external source can be connected to the same AC line as the SCU power supply as long as it is only used to power low voltage devices (less than 30 volts).
- Analog Output Powered Devices
- No analog output devices can be powered by the SCU analog outputs.
- SCU specifications are the same as MBC/RBC specifications with the exception that CL2P or CL2 wire can be used because it is separated from Class 1 wiring in the field panel by physical barriers.
- For No.18 to No.22 AWG used at 4800 bps and lower, BLN and FLN wiring specifications allow a minimum of six twists per foot. At 9600 bps and higher, use wire specifications provided in Table BLN, FLN (P1), and Point Expansion Trunk in Chapter 1. Wire specified in this table can be used at any trunk speed.
- Digital Output (DO) Wiring—SCU Specific
- UL and CSA listing requires the following:
- ● The DO wiring shield must be installed in the field panels for which they are supplied.
- ● The DO wiring must enter the SCUs as shown.
- /
- Fig. 152: DO Wiring Entry Locations for the SCU.
- Table Number of SCUs Allowed on a Single Three-Wire Circuit shows the number of SCUs allowed on a single three-wire (ACH, an ACN, and earth ground) circuit if local code permits.
- Number of SCUs Allowed on a Single Three-Wire Circuit.
- Maximum Values for Evenly Spaced Loads
- Maximum Vales for Concentrated Loads
- Circuit Breaker Size1
- SCU
- Length2
- SCU
- Length2
- 7/10
- 100 ft (30.48 m)
- 7/10
- 75 ft (22.87 m)
- 15 amp (No.14 AWG THHN)
- 7/10
- 130 ft (40.63 m)
- 7/10
- 115 ft (35.06 m)
- 20 amp (No.12 AWG THHN)
- Assumes minimum voltage of 102 Vac at circuit breaker and 5 Vac maximum voltage drop (97 Vac at loads). See Class 1 power trunk information in the Wire Specification Tables section of Chapter 1.
- Conduit length from MBC/MEC/RBC/SCU to MBC/MEC/RBC/SCU.
- For SCUs, MOVs must be used across the DO terminals when connected to loads in all cabinets. MOVs are factory-installed on all DOs in SCUs. See the Controlling Transients [➙ 24] section in Chapter 1 for MOV part numbers.
- When installing MOVs across the DO relay contacts on termination boards, keeping MOV leads as short as possible makes the MOV more effective at reducing spikes from field wiring or controlled devices. Remove and reinstall any MOVs with leads longer than 1 to 11/2 inches (25.4 mm to 38.1 mm).
- Line Voltage Receptacle
- MOVs are factory installed in the line voltage receptacle of Rev. 8 and later SCU enclosures.
- /
- Fig. 153: SCU Receptacle with MOVs.
- SCUs with Rev. 7 or earlier termination boards do not contain factory-installed MOVs. These must be field installed.
- SCUs with Revisions 8 through 16 termination boards have one MOV installed across the NO contacts. One additional MOV is required when using the normally closed (NC) contacts.
- SCUs with Rev. 17 or later termination boards have two MOVs installed per point. No additional MOVs are required.
- /
- Fig. 154: Field Installed MOVs.
- NOTE:The TI and IPMDA are no longer available for new sales. Information in this section is for reference only.
- Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 10 VA
- 50/60 Hz
- 115/230 Vac
- TI
- 25 VA
- 50/60 Hz
- 115/230 Vac
- IPMDA
- NOTE:The DPU and MPU are no longer available for new sales. Information in this section is for reference only.
- MPU and DPU Wire Type Requirements.
- Conduit Sharing1
- Distance
- Wire Type (AWG)
- Class
- Circuit Type
- Check local codes
- Check local codes
- No.12 to No.14,No.12 THHN
- Power
- AC line power (to field panel)
- Check local codes
- Check local codes
- Check local codes
- 1
- Digital Output
- Check local codes
- Check local codes
- Check local codes
- 2
- Digital Output
- Class 1 and 2(check local codes)
- 750 ft (230 m)
- No.18 to No.22 TP
- 2
- Digital Input (MPU and DPU)
- Class 1 and 2(check local codes)
- 100 ft (30.5 m)
- No.18 to No.22 TP
- 2
- Analog Input (MPU) Thermistors
- Class 1 and 2(check local codes)
- 180 ft (55 m)2
- No.14 THHN OR No.14 TP
- 2
- MPU Power Trunk
- Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have no adverse affect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
- Distances depend on transformer location. Install 100 VA transformers near the most convenient line voltage sources to minimize line voltage wiring costs. Use one 100 VA transformer for every eight MPUs. (180 ft using 14 AWG wires is worst case).
- The MPU can be powered in two ways:
- ● Individual transformer using a transformer rated for Class 2 service.
- ● Power trunk. For more information, see the section Power Trunk Guidelines [➙ 67].
- CAUTION
- The phase of all devices on a power trunk must be identical.
- Phase differences can destroy equipment. Any relays, EPs, or contactors sharing power must be clamped with MOVs at their locations.
- MPU/DPU Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 30 VA
- 50/60 Hz
- 24 Vac
- MPU
- 50 VA1
- 50/60 Hz
- 115 Vac
- DPU – 115V
- 50 VA1
- 50/60 Hz
- 230 Vac
- DPU – 230V
- Service outlets are restricted to only continuously power network devices.
- MPUs connected to a power trunk with the optional ground wire should have the ground wire connected to the field panel ground lug in each field panel.
- /
- Fig. 155: AC Earth Ground for MPU Connected to a Power Trunk.
- Metal Oxide Varistors (MOVs) must be used across the DO terminals when connected to loads. MOVs are factory-installed in all FLN products.
- When installing MOVs across the DO relay contacts on termination boards, keeping the MOV leads as short as possible makes the MOV more effective at reducing spikes from field wiring or controlled devices. Remove and reinstall any MOVs with leads longer than 1 in. (2.5 cm). See the section Controlling Transients [➙ 24] for MOV part numbers.
- Line Voltage Receptacle
- MOVs are factory-installed in the line voltage receptacle of Rev. 6 and later MPU enclosures and Rev. 8 and later DPU enclosures.
- /
- Fig. 156: MPU/DPU Receptacle with MOVs.
- Digital Outputs
- MPUs and DPUs shipped before March 1, 1989 contain one factory-installed snubber on each DO point on the termination board. The snubber can be placed across the normally open (NO) or normally closed (NC) terminals by means of a jumper. A second MOV must be field installed when both the NO and NC terminals of a DO point are being used.
- No additional MOVs are required on DO points on MPUs or DPUs shipped after March 1, 1989.
- /
- Fig. 157: Field Installed MOVs.
- Table MPU and DPU Wire Type Requirements provides DO wire run lengths for points wired to equipment controllers.
- UL and CSA listing requires the following:
- ● The DO wiring shield must be installed in the cabinets for which they are supplied.
- ● DO wiring must enter the MPUs and DPUs as shown.
- /
- Fig. 158: DO Entry Locations for MPU and DPU.
- NOTE:The Pneumatic TEC is no longer available for new sales. Information in this section is for reference only.
- When placing the low voltage, (24 Vac Class 2), pneumatic output Terminal Equipment Controllers on a power trunk, use the nameplate power rating for calculating the maximum number of devices that can be placed on a Class 2 power trunk. The nameplate power rating takes into account a controller power factor of less than unity.
- Do not control more than the nameplate rated loads for the DOs of the pneumatic output controllers. The controller UL and CSA listing is based on the nameplate power rating.
- The separate FAN output (Form A dry contact) on the Unit Vent Controllers is rated at 1/3 H.P. at 115 or at 230 Vac. The digital output, which is part of the large wiring harness, switches the incoming power to the controller. This cable can contain up to 230 Vac depending on controller input voltage. The 115 and 230 Vac controllers use a molded cord for this output. Exceeding the nameplate power on this output can damage the controller circuit board.
- The power source for the high voltage Unit Vent Controller should be obtained after the fuse in the unit ventilator. By obtaining the power for the controller after the fuse, you can ensure that the controller is powered down whenever the fuse opens or is removed.
- TEC Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 12 VA + damper output
- 50/60 Hz
- 24 Vac
- Terminal Equipment Controller—Pneumatic Output, Low Voltage
- 7 VA + damper output
- 50/60 Hz
- 115 Vac
- Terminal Equipment Controller—Pneumatic Output, High Voltage
- 7 VA + damper output
- 50/60 Hz
- 230 Vac
- Terminal Equipment Controller—Pneumatic Output, High Voltage
- Service outlets are restricted to only continuously power network devices.
- Pneumatic Output Wire Type Requirements.
- Conduit Sharing1
- Distance2
- Wire Type (AWG)
- Class
- Circuit Type
- Check local codes
- Check local codes
- Check local codes
- 2
- Input Power(Low voltage controllers)
- Check local codes
- Check local codes
- Check local codes
- 1
- Input Power (Unit Vent Controller—115/230V)
- Check local codes
- Check local codes
- Check local codes
- 2
- Damper Output(Low voltage controllers)
- Check local codes
- Check local codes
- Check local codes
- 1
- Damper Output (Unit Vent Controller—115/230V)
- Class 1 and 2Check local codes
- 100 ft (30 m)
- No. 18 to No. 22 TP
- 2
- Digital Inputs
- Class 1 and 2Check local codes
- 100 ft (30 m)
- No. 18 to No. 22 TP
- 2
- Analog Inputs
- Class 2
- 100 ft (30 m)
- Pre-terminated 3 TP No. 24
- 2
- Room Temperature Sensor
- Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have no adverse affect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
- Check local codes concerning wire gauge and distance to extend the 3-foot pre-determined “Fan Output” cable. The 3-foot cable is No. 18 AWG.
- NOTE:Follow local codes regarding wire gauge and length.
- LonWorks® FLN Wire Type Requirements.
- Maximum Node-to-Node Length
- Maximum Total Wire Length*
- Wire Type
- 1312 ft (400 m)
- 1640 ft (500 m)
- 22 AWG 1 pair, stranded, unshielded or shielded, Level IV per NEMA standards
- Maximum trunk length can be extended by 1640 ft (500 m) with a two-port repeater or by two additional 1640 ft (500 m) segments with a three-port repeater.
- LTEC Recommended Wire Gauges.
- Recommendation
- Class
- Connection Type
- 3 wire, 16 AWG to 12 AWG cable
- 2
- 24 Vac input
- 22 AWG TP, Level IV1
- 2
- Network connection
- Pre-terminated1, plenum-rated, 3-pair cable2
- 2
- LTEC Room Temperature Sensor
- 20–22 AWG TP
- 2
- Application Inputs
- 20–22 AWG TP
- 2
- Analog outputs
- 16–20 AWG per local code and current/length voltage drop requirements
- 2
- Digital outputs
- Level IV cable per NEMA standards (not equivalent to EIA/TIA Level 4 cable).
- Available in fixed lengths of 25, 50, and 100 feet (7.6, 15.2, and 30.5 m).
- LTEC Inputs and Outputs.
- Details
- Specification
- 100K Ω thermistor/0 to 10 Vdc, 4 to 20 mA, or dry contact
- Application inputs
- 10K Ω thermistor
- Room sensor input
- Triac (max. 500 mA at 24 Vac)
- Digital outputs
- 0 to 10 Vdc (max. 12.5 mA)
- Analog outputs
- LTEC Room Temperature Sensor Specifications.
- Details
- Specification
- 10K Ω thermistor @ 77°F (25°C)
- Resistance value (sensor)
- Output signals
- • Changing resistance
- • Room temperature
- • Changing resistance
- • Set point
- • Digital
- • Occupancy (bypass button)
- 100 ft (30.5 m) maximum cable length
- Installation
- 3 pr. 24 AWG, NEC Class 2
- The base rating of the controller and the sum of the sensor, actuators, and relays connected dictates the VA rating.
- CAUTION
- The LTEC Digital Outputs (DOs) control 24 Vac only. The maximum rating is 12 VA for each DO. Use an interposing 24 Vac relay for any of the following:
- - VA requirements higher than the maximum - 110 to 220 Vac or higher - Control load requires DC power - Separate transformers used to power the load - Need for dry contacts
- CAUTION
- The neutral side of the 24 Vac power transformer for the TEC must be tied to earth at the source of the 24 Vac and only at this point.
- LTEC Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 5 VA plus loads
- 50/60 Hz
- 24 Vac
- LTEC
- Allowable loads for the LTEC are 24 Vac devices (actuators, interposing relays, motor contactor control coils, solenoids, lamps or indicators) rated at 12 VA or less for each termination set. If the load exceeds 12 VA @ 24 Vac, an interposing relay must be used.
- CAUTION
- The entire digital output load on a single LTEC must not exceed 95 VA.
- Power for the loads is obtained from the same terminals that supply power to the LTEC. If fusing is required, 3/4 amp slow blow fuses are recommended per digital output. The entire LTEC and its loads must be powered from a 24 Vac line fused at 4 amps (100 VA) or less.
- NOTE:The LTEC uses triacs to control digital output loads. The triacs are rated at 500 mA at 24 Vac for a power rating of 12 VA for each termination set.
- Each application set has a default input/output-wiring configuration shown in the wiring diagrams. All input and output physical connections are pre-configured per application. See the installation instructions for application-specific wiring diagrams.
- The wiring diagrams are shown using the full point controllers (shaded terminals). Reduced point controllers should be used when the additional input/output points are not required.
- Points shown as optional on the wiring diagrams are pre-configured I/O points. In some instances, some configuration parameters will need to be modified to use these points.
- /
- Fig. 159: LTEC Wiring Designations.
- Input Configuration and Jumper Settings.
- 0-20 / 4-20 mA input
- 0-10 Vdc input
- 100K Thermistor
- Digital input
- Not available
- Not available
- AI/DI 1
- Not available
- Not available
- AI/DI 2
- Not available
- AI/DI 3
- //
- //
- //
- internal jumper
- internal jumper
- internal jumper
- Not available
- AI/DI 4
- //
- //
- //
- internal jumper
- internal jumper
- internal jumper
- Not available
- AI/DI 5
- Resistor, 499 Ω 1%, part number (587-152) for AI 5 current input (0-20 mA).
- See LTEC Internal Jumper Location figure for physical location of internal jumpers and external terminal block connections.
- The location of physical inputs must match a specific application wiring diagram; see Installation Instructions.
- /
- Fig. 160: LTEC Internal Jumper Location.
- The LTEC can be wired using a free topology configuration. The LTEC communicates on the LonTalk network at 78K bps.
- Terminals 1 and 2 on J2 are reserved for the network connection.
- NOTE:The connection is not polarity sensitive.
- /
- Fig. 161: Network to LTEC Connection.
- The following terminations are reserved for the power connection to the LTEC:
- ● N (Neutral)
- ● H (Hot)
- ● E (Earth)
- /
- Fig. 162: Power Connection to LTEC.
- 100K Ω thermistor inputs can be wired to the LTEC inputs AI 1/DI 1 or AI 2/DI 2 on terminal block J6.
- NOTE:The following figure illustrates a 100K Ω thermistor input connecting to input terminals J6-2 and J6-3, which correspond to termination set AI 1/DI 1.
- /
- Fig. 163: 100K Ω Thermistor Input Connection to the LTEC.
- 100K Ω Thermistor Input Wiring Details.
- Internal Jumper
- Terminal Numbers
- Termination Set
- Common –
- Signal +
- N/A
- J6-3
- J6-2
- AI 1/DI 1
- N/A
- J6-6
- J6-5
- AI 2/DI 2
- AI 1/DI 1, AI 2/DI 2, or AI 5/DI 5
- Digital inputs can be wired to the LTEC inputs AI 1/DI 1, AI 2/DI 2, or AI 5/DI 5 on terminal block J4 or J6 (Figure 132). An external jumper provides a 5 Vdc source to be used for sensing dry contacts.
- AI 3/DI 3 or AI 4/DI 4
- Digital inputs can be wired to the LTEC inputs AI 3/DI 3 or AI 4/DI 4 on terminal block J6 (Figure 133). For these inputs, use the internal jumper blocks, J12 and J13 respectively, and configure them as shown in Table Digital Input Wiring Details.
- Figure 133. Digital Input Connection to LTEC Inputs AI 3/DI 3 or AI 4/DI 4.
- Figure 132. Digital Input Connection to LTEC Inputs AI 1/DI 1, AI 2/DI 2, or AI 5/DI 5.
- NOTE:Figure 132 illustrates a digital input connecting to input terminals J6-2 and J6-3, which correspond to termination set AI 1/DI 1. Figure 133 illustrates a digital input connecting to input terminals J4-1 and J4-2, which correspond to termination set AI 3/DI 3.
- Digital Input Wiring Details.
- Internal Jumper
- Terminal Numbers
- Termination Set
- Common–
- Signal+
- DI (Voltage Source) +5
- N/A
- J6-3
- J6-2
- J6-1
- AI 1/DI 1
- N/A
- J6-6
- J6-5
- J6-4
- AI 2/DI 2
- J4-2
- J4-1
- N/A
- AI 3/DI 3
- J4-4
- J4-3
- N/A
- AI 4/DI 4
- N/A
- J4-7
- J4-6
- J4-5
- AI 5/DI 5*
- Available on full point controller only.
- Digital inputs can be wired to the LTEC inputs AI 1/DI 1, AI 2/DI 2, or AI 5/DI 5 on terminal block J4 or J6. An external jumper provides a 5 Vdc source to be used for sensing dry contacts.
- Digital inputs can be wired to the LTEC inputs AI 3/DI 3 or AI 4/DI 4 on terminal block J6 (Figure Digital Input Connection to LTEC Inputs AI 3/DI 3 or AI 4/DI 4). For these inputs, use the internal jumper blocks, J12 and J13 respectively, and configure them as shown in Table Digital Input Wiring Details.
- NOTE:Figure Digital Input Connection to LTEC Inputs AI 1/DI 1, AI 2/DI 2, or AI 5/DI 5 illustrates a digital input connecting to input terminals J6-2 and J6-3, which correspond to termination set AI 1/DI 1. Figure Digital Input Connection to LTEC Inputs AI 3/DI 3 or AI 4/DI 4 illustrates a digital input connecting to input terminals J4-1 and J4-2, which correspond to termination set AI 3/DI 3.
- Digital Input Wiring Details.
- Internal Jumper
- Terminal Number
- Termination Set
- Common–
- Signal+
- DI (Voltage Source) +5
- N/A
- J6-3
- J6-2
- J6-1
- AI1/DI1
- N/A
- J6-6
- J6-5
- J6-4
- AI2/DI2
- J4-2
- J4-1
- N/A
- AI3/DI3
- J4-4
- J4-3
- N/A
- AI4/DI4
- N/A
- J4-7
- J4-6
- J4-5
- AI5/DI5*
- *Available on full point controller only.
- Analog inputs (voltage) can be wired to the LTEC inputs AI 3/DI 3 through AI 5/DI 5 on terminal block J4 (Figure 134). For AI 5/DI 5, connect directly to J4-6 and J4-7; no jumpers are required (Figure 135).
- NOTE:Figure 134 illustrates an analog input (voltage) connecting to input terminals J4-1 and J4-2, which correspond to termination set AI 3/DI 3.
- Figure 135. Analog Input (Voltage) Connection to LTEC Input AI 5/DI 5.
- Figure 134. Analog Input (Voltage) Connection to LTEC Inputs AI 3/DI 3 and AI 4/DI 4.
- Analog Input (Voltage) Wiring Details.
- Internal Jumper
- Terminal Numbers
- Termination Set
- Common–
- Signal+
- J4-2
- J4-1
- AI 3/DI 3
- J4-4
- J4-3
- AI 4/DI4
- N/A
- J4-7
- J4-6
- AI 5/DI 5*
- Available on full point controller only.
- Analog inputs (4-20 mA current) can be wired to the LTEC inputs AI 3/DI 3 through AI 5/DI 5 on terminal block J4. For AI 3/DI 3 and AI 4/DI 4, use the internal jumper block for current input as shown in Figure 136. For AI 5/DI 5, use an external resistor as shown in Figure 137.
- NOTE:Figure 136 illustrates an analog input (current) connecting to input terminals J4-1 and J4-2, which correspond to termination set AI 3/DI 3.
- Figure 137. Analog Input (Current) Connection to LTEC Input AI 5/DI 5.
- Figure 136. Analog Input (Current) Connection to LTEC Input AI3/DI3 or AI 4/DI 4.
- Analog Input (Current) Wiring Details.
- Internal Jumper
- Terminal Numbers
- Termination Set
- Common–
- Signal+
- J4-2
- J4-1
- AI 3/DI 3
- J4-4
- J4-3
- AI 4/DI 4
- N/A1
- J4-7
- J4-6
- AI 5/DI 5*
- Use external 499Ω 1% resistor across terminal 6-7.
- Available on full point controller only.
- ON/OFF digital outputs can be wired to the LTEC outputs DO1 through DO 8 on terminal block J3.
- NOTE:Figure Digital Output (ON/OFF) Connection to the LTEC illustrates an ON/OFF digital output connecting to output terminals J3-1 and J3-2, which correspond to termination set DO 1.
- /
- Fig. 164: Digital Output (ON/OFF) Connection to the LTEC.
- Digital Output—ON/OFF Wiring Details.
- Terminal Numbers
- Termination Set
- 24V Sources
- Triac Control Output
- J3-2
- J3-1
- DO 1
- J3-4
- J3-3
- DO 2
- J3-6
- J3-5
- DO 3
- J3-8
- J3-7
- DO 4
- J3-10
- J3-9
- DO 5
- J3-12
- J3-11
- DO 6
- J3-14
- J3-13
- DO 7*
- J3-16
- J3-15
- DO 8*
- Available on full point controller only.
- A 3-position floating motor can be wired to two sets of consecutive terminations on the LTEC outputs DO 1 through DO 8. Use terminal block J3.
- NOTE:Figure 3-Position Floating Motor Connection to the LTEC illustrates a 3-position floating motor connecting to output terminals J3-1, J3-2, J3-3, and J3-4, which correspond to termination set DO 1 and DO 2.
- /
- Fig. 165: 3-Position Floating Motor Connection to the LTEC.
- NOTE:The outputs of the 3-position floating motor must be wired across two sets of consecutive terminal blocks (that is, DO 1 to DO 2, DO 2 to DO 3, DO 3 to DO 4, etc.).
- Digital Output—3 Position Floating Motor Wiring Details.
- Terminal Numbers
- Termination Set
- 24V Sources
- Triac Control Output
- J3-2
- J3-1
- DO 1
- J3-4
- J3-3
- DO 2
- J3-6
- J3-5
- DO 3
- J3-8
- J3-7
- DO 4
- J3-10
- J3-9
- DO 5
- J3-12
- J3-11
- DO 6
- J3-14
- J3-13
- DO 7*
- J3-16
- J3-15
- DO 8*
- Available on full point controller only.
- A single lighting contactor or interface relay, or a single point that drives multiple lighting contactors can be wired to the LTEC outputs DO 1 through DO 8 on terminal block J3.
- NOTE:Figure Lighting Contractor–Maintained Connection to the LTEC illustrates a lighting contactor or interface relay connecting to output terminals J3-15 and J3-16, which correspond to termination set DO 8.
- /
- Fig. 166: Lighting Contactor—Maintained Connection to the LTEC.
- Lighting Contactor—Maintained Wiring Details.
- Terminal Numbers
- Termination Set
- 24V Sources
- Triac Control Output
- J3-2
- J3-1
- DO 1
- J3-4
- J3-3
- DO 2
- J3-6
- J3-5
- DO 3
- J3-8
- J3-7
- DO 4
- J3-10
- J3-9
- DO 5
- J3-12
- J3-11
- DO 6
- J3-14
- J3-13
- DO 7*
- J3-16
- J3-15
- DO 8*
- Available on full point controller only.
- A pulsed (momentary) lighting contactor can be wired to the LTEC outputs DO 1 through DO 8 on terminal block J3. Pulsed lighting contactors are controlled by two consecutive outputs: one output to pulse and latch the lights on and the other to pulse and latch the lights off. The lighting contactors can connect to any consecutive pair of termination sets between DO 1 and DO 8 (that is, DO 1 to DO 2, DO 2 to DO 3, DO 3 to DO 4, etc.).
- NOTE:Figure Lighting Contractor—Pulsed Connection to the LTEC illustrates the pulsed lighting contactor connecting to output terminals J3-13, J3-14, J3-15, and J3-16, which correspond to termination sets DO 7 and DO 8.
- /
- Fig. 167: Lighting Contactor—Pulsed Connection to the LTEC.
- Lighting Contactor—Pulsed Wiring Details.
- Terminal Numbers
- Termination Set
- 24V Sources
- Triac Control Output
- J3-2
- J3-1
- DO 1
- J3-4
- J3-3
- DO 2
- J3-6
- J3-5
- DO 3
- J3-8
- J3-7
- DO 4
- J3-10
- J3-9
- DO 5
- J3-12
- J3-11
- DO 6
- J3-14
- J3-13
- DO 7*
- J3-16
- J3-15
- DO 8*
- Available on full point controller only.
- An analog output (0-10 Vdc) can be wired to the LTEC outputs AO 1 or AO 2 on all controllers and to AO 1 through AO 3 on Unit Ventilator Controllers. Use terminal block J7 (Figure Analog Output (0-10 Vdc) Connection to the LTEC).
- NOTE:Figure Analog Output (0-10 Vdc) Connection to the LTEC illustrates an analog output (0-10 Vdc) connecting to output terminals J7-3 and J7-4, which correspond to termination set AO 2.
- /
- Fig. 168: Analog Output (0-10 Vdc) Connection to the LTEC.
- Locally-powered Actuator Connections
- Local actuators, where the actuator and the LTEC share one transformer, can be wired to LTEC outputs AO 1, AO 2, or AO 3 on terminal block J7 (Figure Locally-powered Actuator Connection to the LTEC).
- NOTE:Figure Locally-powered Actuator Connection to the LTEC illustrates the actuator connecting to output terminals J7-3 and J7-4, which correspond to termination set AO 2.
- /
- Fig. 169: Locally-powered Actuator Connection to the LTEC.
- Remotely-powered Actuator Connections
- Remote actuators, where the actuator and the LTEC are served by separate transformers, can be wired to LTEC outputs AO 1, AO 2, or AO 3 on terminal block J7 (Figure Remotely-powered Actuator Connection to the LTEC).
- NOTE:Figure Remotely-powered Actuator Connection to the LTEC illustrates the actuator connecting to output terminals J7-3 and J7-4, which correspond to termination set AO 2.
- /
- Fig. 170: Remotely-powered Actuator Connection to the LTEC.
- Analog Output (0-10 Vdc) Wiring Details.
- Terminal Numbers
- Termination Set
- Common
- Signal Out
- J7-2
- J7-1
- AO 1*
- J7-4
- J7-3
- AO 2*
- J7-6
- J7-5
- AO 3*(only available on Unit Ventilator controllers)
- *Available on full point controller only.
- NOTE:The TCU is no longer available for new sales. Information in this section is for reference only.
- TCU Wire Type Requirements.
- Conduit Sharing1
- Distance2
- Wire Type (AWG)
- Class
- Circuit Type
- Check local codes
- Check local codes
- No. 12 to No. 14,No. 12 THHN
- Power
- AC line power (to field panel)
- Check local codes
- Check local codes
- Check local codes
- 1
- Digital Output
- Check local codes
- Check local codes
- Check local codes
- 2
- Digital Output
- Class 1 and 2(check local codes)
- 150 ft (46 m)
- No. 22 5-conductor cable
- 2
- Line Volt Relay Module; 5-conductor cable to module
- Class 1 and 2(check local codes)
- 150 ft (46 m)
- No. 22 5-conductor cable
- 2
- Digital Input
- Class 1 and 2(check local codes)
- 100 ft (30.5 m)
- No. 22 5-conductor cable
- 2
- Analog Input Thermistors
- Class 1 and 2(check local codes)
- 150 ft (46 m)
- No. 22 5-conductor cable
- 2
- Actuator Output
- Class 1 and 2(check local codes)
- 180 ft (55 m)2
- No. 14 THHN or No. 14 TP
- 2
- Power Trunk
- Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have no adverse affect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
- Distances depend on transformer location. Install 100 VA transformers near the most convenient line voltage sources to minimize line voltage wiring costs. Use one 100 VA transformer for every eight MPUs. (180 ft using 14 AWG wires is worst case).
- TCUs can be powered in three ways. Correct sizing and fusing must be maintained for each of these powering techniques:
- ● Individual transformer using a transformer rated for Class 2 service.
- ● Power trunk. For more information, see the section Power Trunk Guidelines [➙ 67].
- ● Low voltage source of the device the controller is controlling (for example, fan powered boxes, electric room heat, fan coils, and heat pumps).
- CAUTION
- The phase of all devices on a power trunk must be identical.
- Phase differences can destroy equipment. Any relays, EPs, or contactors sharing power must be clamped with MOVs at their locations.
- TCU Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 14 – 22.7 VA1
- 50/60 Hz
- 24 Vac
- TCU
- Dependent on application.
- Table MPU and DPU Wire Requirements provides DO wire run lengths for points wired to Terminal Control Units.
- UL and CSA listing requires the DO wiring shield be installed in the cabinets for which they are supplied.
- A ground lug is provided on TCUs, if required due to local codes or for RF grounding reasons.
- Metal Oxide Varistors (MOVs) must be used across the DO terminals when connected to loads. MOVs are factory-installed in all FLN products.
- When installing MOVs across the DO relay contacts on termination boards, keeping the MOV leads as short as possible makes the MOV more effective at reducing spikes from field wiring or controlled devices. Remove and reinstall any MOVs with leads longer than 1 in. (2.5 cm). See the section Controlling Transients [➙ 24] for MOV part numbers.
- Line Voltage Relay Module
- Low voltage MOVs can be required if severe noise problems arise. A jumper is provided to allow you to position the snubber across either the normally open (NO) or normally closed (NC) contacts.
- NOTE:The Unitary Controller (UC) is no longer available for new sales. Information in this section is for reference only.
- Unitary Controller Wire Type Requirements.
- Conduit Sharing1
- Distance
- Wire Type (AWG)
- Class
- Circuit Type
- Check local codes
- Check local codes
- Check local codes
- 2
- Input Power
- Class 2
- 750 ft (228 m)
- No. 18 to No. 22TP
- 2
- Analog Input—RTD
- Class 2
- 750 ft (228 m)
- No. 18 to No. 22 TP
- 2
- Analog Input—0-20 mA or 010 Vdc
- Check local codes
- 750 ft (228 m)
- No. 18 to No. 22 TP
- 2
- Analog Output—0-12 Vdc or 0-20 mA
- Class 1 and 2Check local codes
- 750 ft (228 m)
- No. 18 to No. 22 TP
- 2
- Digital Input
- Check local codes
- Check local codes
- No. 18 to No. 22 TP
- 1
- Digital Output
- Check local codes
- Check local codes
- Check local codes
- 2
- Digital Output
- Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have no adverse affect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
- UCs can be powered in three ways:
- ● Individual transformer using a transformer rated for Class 2 service.
- ● Power trunk. For more information, see the section Power Trunk Guidelines [➙ 67].
- ● Low voltage source of a device that the UC is controlling (for example, electric-pneumatic transducer, etc.).
- CAUTION
- The phase of all devices on a power trunk must be identical.
- Phase differences can destroy equipment. Any relays, EPs, or contactors sharing power must be clamped with MOVs at their locations.
- UC Power Source Requirements.
- Maximum Power
- Line Frequency
- Input Voltage
- Product
- 15.0 VA1
- 50/60 Hz
- 24 Vac
- Unitary Controller
- For standard UC package.
- Table Unitary Controller Wire Type Requirements provides DO wire run lengths for points wired to Unitary Controllers.
- UL and CSA listing requires the DO wiring shield be installed in the cabinets for which they are supplied.
- Metal Oxide Varistors (MOVs) must be used across the DO terminals when connected to loads. MOVs are factory-installed in all FLN products.
- When installing MOVs across the DO relay contacts on termination boards, keeping the MOV leads as short as possible makes the MOV more effective at reducing spikes from field wiring or controlled devices. Remove and reinstall any MOVs with leads longer than 1 in. (2.5 cm). See the section Controlling Transients [➙ 24] for MOV part numbers.
- TEC Wire Type Requirements.
- Conduit Sharing1
- Distance
- Wire Type (AWG)
- Class
- Circuit Type
- Class 2
- Check local codes
- Check local codes
- 2
- Input Power
- Class 2
- 150 ft (46 m)
- Check local codes
- 2
- Digital Output
- Class 2
- 150 ft (46 m)
- Check local codes
- 2
- Analog Output
- Class 2
- 150 ft (46 m)
- No. 18 to No. 22 TP
- 2
- Digital Inputs
- Class 2
- 100 ft (30 m)
- No. 18 to No. 22 TP
- 2
- Analog Inputs
- Class 2
- 100 ft (30 m)
- Pre-terminated 3 TP
- 2
- Room Temperature Sensor
- Conduit sharing rules were determined through EMI and shared conduit testing. These rules indicate wiring methods that have no adverse effect on the proper operation of the equipment, but do not necessarily indicate compliance with local codes.
- TECs can be powered in three ways. Correct sizing and fusing must be maintained for each of these powering techniques:
- ● Individual transformer using a transformer rated for Class 2 service.
- ● Power trunk. For more information, see the section Power Trunk Guidelines [➙ 67].
- ● Low voltage source of the device the controller is controlling (for example, fan powered boxes, electric room heat, fan coils, and heat pumps).
- CAUTION
- The phase of all devices on a power trunk must be identical.
- Phase differences can destroy equipment. Any relays, EPs, or contactors sharing power must be clamped with MOVs at their locations.
- CAUTION
- The neutral side of the 24 Vac power transformer for the TEC must be tied to earth at the source of the 24 Vac and only at this point.
- N Variant TEC (Updated Hardware) Power Source Requirements.
- Maximum Power 1
- Line Frequency
- Input Voltage
- Product
- 3 VA + 12 VA max per DO
- 50/60 Hz
- 24 Vac
- Terminal Equipment Controller—Electronic Output (6 DO Platform)
- 7 VA + 12 VA max per DO
- 50/60 Hz
- 24 Vac
- Terminal Equipment Controller—Electronic Output (8 DO Platform)
- TEC (Legacy Hardware) Power Source Requirements.
- Maximum Power 1
- Line Frequency
- Input Voltage
- Product
- 10 VA + 12 VA max per DO
- 50/60 Hz
- 24 Vac
- Terminal Equipment Controller—Electronic Output (6 DO Platform)
- 10 VA + 12 VA max per DO
- 50/60 Hz
- 24 Vac
- Terminal Equipment Controller—Electronic Output (8 DO Platform)
- Total VA rating is dependent upon the controlled DO loads (for example, actuators, contactors, etc.).
- Smoke control listed TECs are limited to 6 VA max per DO.
- 6 DO Platform
- /
- Fig. 171: 6 DO Controller.
- /
- Fig. 172: 6 DO Controller with Air Velocity Sensor.
- 8 DO Platform
- /
- Fig. 173: 8 DO Controller.
- /
- Fig. 174: 8 DO Controller with Air Velocity Sensor.
- /
- Fig. 175: ATEC Wiring for AI/DI.
- Wiring DI Common (pin 4) t 10K/100K selectable thermistor – 8 Vdc (pin 2) incorrectly, will cause the actuator to shut down. No damage will occur. When the wiring is corrected, the actuator will resume operation.
- The Wire Type Requirements [➙ 237] provides DO wire run lengths for points wired to TECs.
- UL and CSA listing requires the DO wiring shield be installed in the cabinets for which they are supplied.
- NOTE:See the Installation Instructions for point wiring diagrams.
- Do not control more than the nameplate rated loads for the DOs of the pneumatic output controllers. The controller UL and CSA listing is based on the nameplate power rating.
- The Terminal Equipment Controller – Pneumatic Output controls 24 Vac loads only. The maximum rating is 12 VA for each DO. For higher VA requirements, 110 or 220 Vac requirements, separate transformers used to power the load, or DC power requirements, use an interposing 220 V 4-relay module (TEC Relay Module P/N 540-147).
- 6 DO Platform
- /
- Fig. 176: 6 DO Controller.
- /
- Fig. 177: 6 DO Controller with Air Velocity Sensor.
- 8 DO Platform
- /
- Fig. 178: 8 DO Controller.
- /
- Fig. 179: 8 DO Controller with Air Velocity Sensor.
- Glossary
- The glossary contains terms and acronyms that are used in this manual.
- ACH
- Alternating Current Hot.
- ACN
- Alternating Current Neutral.
- AEM/AEM100/AEM200
- Devices that allow APOGEE field panel networks to communicate with the Insight workstation across an Ethernet network. The APOGEE Ethernet Microserver (AEM) operates on a 10Base-T connection, but can also be routed across low speed networks (for example, across Frame Relay). The AEM100 supports auto-sensing 10Base-T and 100Base-TX Ethernet communication. The AEM200 adds a second serial port, allowing HMI access without disconnecting from the Insight network.
- Alarm Indicating Circuit (AIC)
- Used in Protective Signaling Systems (that is, fire alarm systems) to connect to alarm devices (horns, speakers, flashing lights, etc.).
- ANSI
- American National Standards Institute
- Automation Level Network (ALN)
- Field panel (Protocol 2, Ethernet, or BACnet/IP) network consisting of PXC Modular Series, PXC Compact Series, MECs, MBCs, RBCs, and FLN Controllers. BACnet/IP ALNs may also contain Insight BACnet/IP-capable workstations and third-party BACnet devices. The Automation Level Network (ALN) and Building Level Network (BLN) are identical.
- BACnet
- ASHRAE Building Automation and Control Networking protocol that allows computerized equipment performing various functions to exchange information, regardless of the building service the equipment performs.
- Class 1 Circuit
- Remote control and signaling circuits not exceeding 600 Vac and having no power limitation. Normally used for controlling equipment such as fans or pumps through starters.
- Class 2 Circuit
- Power limited circuits not exceeding a power level of 100 VA (that is, 24 Vac × 4 amps = 96 VA).
- Class 3 Circuit
- Circuits of relatively low power but of higher voltage than Class 2 (such as 120 volts and up to 1 amp). This is not a common application.
- Class 2 Power Source, Inherently Limited
- An inherently limited Class 2 power source has some form of current-limiting characteristic designed into the product. Sources of this type are often protected by a current-limiting impedance or embedded fusible link, but other methods are also used. As long as the current limiting is an integral part of the power supply, it will fall into this category. Because of this built-in current-limiting characteristic, a circuit powered by this type of source needs no further protection to qualify as a Class 2 circuit.
- Class 2 Power Source, Not Inherently Limited
- A Class 2 source that is not inherently limited does not have built-in current limiting protection. At the time of installation, a current-limiting device must be installed between the source and the loads. The most common current limiting device for this application is a single fuse or integral transformer circuit breaker, which must be sized so that the power available to the loads does not exceed 100 VA.
- EIA
- Electronic Industries Association.
- Electromagnetic Interference (EMI)
- Electrical noise induced in process wiring by electric or magnetic fields created by power wiring, other process wiring, or electrical equipment.
- Field Level Network (FLN)
- Data communications link that passes information between an FLN device or devices and an Automation Level Network (ALN) device.
- IEEE
- Institute of Electrical and Electronic Engineers.
- IEEE Standard 802.3
- Explains the basic functioning of the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) packet network with an exclusive focus on the ISO/IEC (International Organization of Standardization and the International Electrotechnical Commission).
- Initiating Device Circuit (IDC)
- Used in Protective Signaling Systems (that is, fire alarm and security systems) to monitor alarm or supervisory sensing devices (manual stations, smoke detectors, valve tamper switches, etc.).
- Interoperability
- Process that ensures that multiple nodes (from the same or different manufacturers) can be integrated into a single network (LonWorks ® FLN) without custom development.
- Lay
- Axial distance required for one cabled conductor to complete one revolution about the axis around which it is cabled (for example, a cable lay of 2 inches (50.8 mm) is equivalent to six twists per foot).
- LonMark
- The LonMark Interoperability Consortium is an industry group whose purpose is to make recommendations to Echelon Corporation on interoperability issues. Issues include standardization of Network Variable types, Configuration Property Types, and Object Definitions. The logo indicates that the product is LonWorks® interoperable.
- LonWorks
- An open networking technology platform for interoperable control networks. The generic term for Echelon’s line of networking products.
- Management Level Network (MLN)
- Communications connection between individual Insight workstations in an APOGEE building control system.
- National Electrical Code (NEC)
- Code of standards issued by the National Fire Protection Association (NFPA) for “...safeguarding of persons and property from hazards arising from the use of electricity.”
- Node
- Single Neuron 3120 or 3150 Chip in a LON® product.
- Plenum Cable
- Specially jacketed cabling (flame resistant and low smoke properties) for use without conduit in air plenums where local code permits.
- PXC Compact
- The PXC Compact is a series of high-performance, Direct Digital Control (DDC), programmable controllers. The controllers operate stand-alone or networked to perform complex control, monitoring, and energy management functions without relying on a higher-level processor. The Compact series communicates with an Insight workstation and other APOGEE or pre-APOGEE field panels on a peer-to-peer Automation Level Network (ALN).
- PXC Modular
- The PXC Modular is a global hardware platform. It has installation flexibility, a capability for large point counts, and supports FLN devices. The Modular series communicates with an Insight workstation and other APOGEE or pre-APOGEE field panels on a peer-to-peer Automation Level Network (ALN), and with TX-I/O modules directly through the TX-I/O self-forming bus.
- Signaling Line Circuit (SLC)
- Used in a Protective Signaling System (that is, fire or security) to carry multiple signals. Typically, the communication channel (trunk) between a central monitoring station and remote units at an APOGEE Automation System.
- Snubber
- Series resistor capacitor suppression network designed to control the maximum voltage spike across a circuit.
- Structured Cabling
- Wiring system conforming to industry standards and practices for use by voice and data communication networks. Refers to cable, both copper and fiber optic, and associated hardware including telecommunications closets.
- Sub-system
- One or more LON nodes working together and being managed by a single network management tool.
- System
- One or more independently managed LON sub-systems working together.
- THHN
- Flame retardant, heat resistant, thermoplastic covered wire.
- TIA
- Telecommunications Industry Association
- TX-I/O
- TX-I/O™ is a line of I/O modules with associated power and communication modules for use within the APOGEE Automation System.
- TX-I/O Modules
- TX-I/O Modules provide I/O points for the APOGEE Automation System based upon TX-I/O Technology. TX-I/O Technology provides flexibility of point types, tremendous flexibility of signal types and support for manual operation.
- Shielded Twisted Pair (STP)
- Stranded or solid wire twisted into pairs. Shielding is individually wrapped around each twisted pair or around all twisted pairs contained in the sheath.
- Unshielded Twisted Pair (UTP)
- Stranded or solid wire twisted into pairs. Multiple twisted pairs may be contained in the same sheath.
- Virtual AEM (VAEM)
- Firmware emulation of an APOGEE Ethernet Microserver (AEM). See AEM/AEM100/AEM200 in this Glossary.
- Index
Chapter 2 – Network Electrical Systems
RS-485 MS/TP Communications
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RS-485 MS/TP Communications
Inter-node protocol communications on P1, P2 and BACnet MS/TP networks take
place over RS-485 physical media.
● This media is defined as a 2-wire half-duplex, differential multipoint serial
connection.
● The EIA standard also specifies a third wire interconnection.
– This third wire connection is important to maintaining signal integrity in
systems encompassing large networks in electrically noisy environments.
– In some cases, the third wire reference is earth ground. In other cases, an
actual third reference wire is run between all nodes.
Isolation may also be provided between the controller main electronics (earth
referenced side) and the network. Interoperability between nodes with different
grounding schemes and isolated versus non-isolated can be maintained by using
guidelines discussed in this section.
Operating in Electrically Noisy Environments
Non-isolated network interfaces that are referenced to earth at each node are much
more susceptible to noise due to differences in the earth ground potential. Large
equipment often injects noise into the earth grounding system when starting, stopping,
or changing speeds. (VFDs, with their carrier frequencies of 3 to 10 KHz and high
harmonics, are right in the RS-485 communications baud rate band.)
Fig. 11: PWM Waveform Phase A to B.
Local surges from lighting and power grid switching cause more noise. If this noise is
over the common mode voltage acceptable by the RS-485 interface circuits, it causes
interruptions in communications.
3-wire RS-485 Network Interfaces
In order to provide higher noise immunity and high data reliability, the network
interfaces for Siemens Industry RS-485 interfaces now provide the RS-485 common
reference signal in the network interface connector. Older 2-wire interfaces provided
the +/- signal lines and Earth (or in some cases just a convenient tie point (FLN
devices)). By providing the RS-485 circuit common reference signal, all 3-wire nodes
wired using a new 1.5-pair shielded cable are referenced together.
The older 2-wire circuit uses a capacitive connection to earth as the reference, which
is more susceptible to earth ground noise. 2-wire connections are still supported per
the Network Wiring Requirements Decision Tree, but 3-wire connections are highly
recommended, especially for all new interfaces that provide a true 3-wire connection.
The use of 1-pair or 1.5-pair cabling is not a requirement of the RS-485 protocol. It is a
result of the electrical interface, which was changed starting with the PXC Compact,
PXC Modular, and P1-BIM.