Specifications

ManualsBrandsAllen-Bradley ManualsComputer equipment1794-IE8H

FLEX I/O, FLEX I/O XT, and FLEX Ex

Bulletin 1794 and 1797

1794-SG002D-EN-P

Summary of content (136 pages)

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FLEX I/O, FLEX I/O XT, and FLEX Ex Bulletin 1794 and 1797 1794-SG002D-EN-P
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Important User Information Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some important differences between solid state equipment and hard-wired electromechanical devices.
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Table of Contents Summary of Changes New and Updated Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Section 1.1 About the FLEX I/O and FLEX Ex 1794 FLEX I/O Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1794 FLEX I/O XT Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 I/O Systems General FLEX I/O and FLEX I/O XT Specifications . . . . . . . . . . . . . . . .
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iv Table of Contents 1794-IT8 Thermocouple/mV Input Module . . . . . . . . . . . . . . . . . . . 1794-IE8XOE4 8 Input/4 Output Analog Combination Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1794-IE4XOE2 and 1794-IE4XOE2XT 4 Input/2 Output Analog Combination Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1794-IF2XOF2I and 1794-IF2XOF2IXT 2 Input/ 2 Output Isolated Analog Combination Module . . . . . . . . . . . . . . . .
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Table of Contents v Section 2.2 Select FLEX Ex I/O Communication Adapters and Distribution Method 1797-RPA ControlNet Ex Coax Drop Repeater Module. . . . . . . . . 81 1797-RPFM ControlNet Ex 3 km Fiber Media Port Adapter. . . . . 82 1797-BCNR Coax Barrier Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Section 2.3 Select FLEX Ex I/O Modules Digital I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features. . . . . . . . . . . . .
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vi Table of Contents 1797-PS2N2 and 1797-PS2E2 24V DC In/ Quad-Ex DC Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 Section 3.1 Mount the FLEX System Select Optional Accessories Section 3.2 1794-CE1 and 1794-CE3 Extender Cables . . . . . . . . . . . . . . . . . . . . 1794-NM1 FLEX I/O Mounting Kit . . . . . . . . . . . . . . . . . . . . . . . . . 1492-EA35 DIN Rail Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Summary of Changes This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph. New and Updated Information This table contains the major changes and additions made to this revision.
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viii Summary of Changes Catalog Number Page Analog I/O Modules 1794-IE8XT 37 1794-IF4IXT 37 1794-IF4ICFXT 37 1794-IF8IH 37 1794-IRT8XT 37 1794-IE4XOE2XT 37 1794-IF2XOF2IXT 37 1794-OE4XT 51 1794-OF4IXT 51 1794-OF8IH 51 Counter Modules 1794-IJ2XT 58 Terminal Base Modules Publication 1794-SG002D-EN-P - May 2012 1794-TB3K 65 1794-TB3SK 65 1794-TB3GK 65 1794-TB3GSK 65 1794-TB3TSK 65 1794-TBKDS 65 1794-TBNK 65 1794-TB37DS 65 1794-TB62DS 65 1794-TB62DSG 65 1794-TB62D
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Section 1.1 About the FLEX I/O and FLEX Ex I/O Systems 1794 FLEX I/O Overview FLEX I/O offers: Adapter Terminal base FlexBus connectors I/O module Keyswitch FlexBus connectors 22 ++ Network Connector 24V DC field power Terminal strips FLEX I/O is a Distributed I/O System that connects to several Networks including EtherNet/IP, ControlNet and DeviceNet. Flexible, low-cost, modular I/O for distributed applications.
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2 About the FLEX I/O and FLEX Ex I/O Systems Terminal bases can be exchanged without moving other bases in your system. If desired, connect individual power supplies to each base to isolate modules. Plug the I/O module into the terminal base to connect the I/O bus and field devices. Remove and insert modules under power. No direct wiring to the module enables you to change modules without disturbing field wiring or system power. Mix and match I/O modules.
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About the FLEX I/O and FLEX Ex I/O Systems 1794 FLEX I/O XT Overview 3 FLEX I/O XT modules are designated for extreme environment use. They differ from their non XT counterparts only in operational temperature ranges and conformal coating is standard for FLEX I/O XT products. FLEX I/O XT modules meet or exceed the following standards: • ANSI / ISA-S71.
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4 About the FLEX I/O and FLEX Ex I/O Systems Specifications Comparison Attribute(1) 1794 FLEX I/O Certifications (when product is marked)(3) • UL Listed Industrial Control Equipment 1794 FLEX I/O XT • UL Listed for Class I, Division 2 Groups A, B, C, D Hazardous Locations • CE Marked for all applicable directives • CE / ATEX • CSA Certified Process Control Equipment for Class I, Division 2 Group A, B, C, D Hazardous Locations • C-Tick Marked for all applicable acts • KCC • Marine Certification • SIL
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About the FLEX I/O and FLEX Ex I/O Systems Specify a FLEX I/O or FLEX I/O XT System 5 Follow these steps as you specify your FLEX I/O or FLEX I/O XT system: ✓ Step See Page 1 Select a communication adapter Choose the network for your operating system.
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6 About the FLEX I/O and FLEX Ex I/O Systems Notes: Publication 1794-SG002D-EN-P - May 2012
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Section 1.2 Select FLEX I/O Communication Adapters Step 1 – Select: a communication adapter based on the appropriate network A FLEX I/O adapter module interfaces FLEX I/O modules to an I/O scanner port across a communication network. The FLEX I/O adapter module contains a built-in power supply that converts 24V DC to 5V DC for the backplane to power the FLEX I/O modules.
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8 Select FLEX I/O Communication Adapters Select a Network You can configure your system for information exchange between a range of field devices and a specific scanner.
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Select FLEX I/O Communication Adapters 9 Figure 1 - EtherNet/IP Communication ControlLogix processor with 1756-ENBT module CompactLogix controller EtherNet/IP network 8 7 6 5 4 3 2 1 (1794-AENT) (1794-AENTR) 1783 Stratix Switch FLEX I/O (1756-ENBT) 1756 I/O FLEX I/O EtherNet/IP Adapter Specifications Attribute 1794-AENT 1794-AENTR 1794-AENTRXT I/O module capacity 8 Communication rate 10/100 Mbps Power consumption at 24V DC 9.6 W 9.3 W Power dissipation, max 7.3 W @ 19.2V DC 7.
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10 Select FLEX I/O Communication Adapters DLR network using EtherNet/IP taps. The following is an illustration of how FLEX I/O systems can be integrated into a DLR topology.
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Select FLEX I/O Communication Adapters 11 FLEX I/O ControlNet Adapter Specifications Attribute 1794-ACN15, 1794-ACN15K, 1794-ACNR15, 1794-ACNR15XT I/O module capacity 8 Communication rate 5 Mbps Power consumption at 24V 7.9 W Inrush current at 24V 23 A for 2 ms Power dissipation, max 4.6 W @ 19.2V DC Thermal dissipation 15.7 BTU/hr @ 19.
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12 Select FLEX I/O Communication Adapters DeviceNet Communication ControlLogix processor CompactLogix processor DeviceNet network DNet In DNet Out MOD NET I-0 I-15 I-1 I-14 I-2 I-13 I-3 1794 FLEX I/O I-12 I-4 I-11 I-5 I - 10 I-6 I-9 I-7 I-8 0 0 2 8 8 6 4 X10 2 6 4 X1 ArmorBlock I/O 1784-PCD module POINT I/O Host computer with DeviceNet Manager software FLEX I/O DeviceNet Adapter Specifications Attribute 1794-ADN, 1794-ADNK I/O module capacity 8 Communication rate 1
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Select FLEX I/O Communication Adapters 13 The 1794-ASB2 supports only two FLEX I/O modules. The 1794-ASBLT is only for use with classic PLC 5/15 or PLC 5/25 processors. ATTENTION: Do not use these Remote I/O adapters with the Classic PLC-5/15 or PLC-5/25 processors. Improper operation of the remote I/O may result.
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14 Select FLEX I/O Communication Adapters Other Networks – PROFIBUS DP Use the 1794-APB or 1794-APBDPV1 adapter to connect to a PROFIBUS DP network. FLEX I/O Remote I/O Adapter Specifications Attribute 1794-APB 1794-APBDPV1 I/O module capacity 8 Communication rate 57.6 Kbps 115.2 Kbps 230.4 Kbps All rates up to 12 Mbps Power consumption at 24V 7.9 W 9.6 W Inrush current at 24V 23 A for 2 ms Power dissipation, max 5.3 W @ 19.2V DC 4.2 W @ 19.2V DC Thermal dissipation 17.9 BTU/hr @ 19.
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Section 1.3 Select FLEX I/O Modules Step 2 – Select: I/O modules The FLEX I/O module plugs into the terminal base, connecting to the I/O bus and field devices. Since there is no direct wiring to the I/O module, you can remove and insert modules under backplane power, enabling you to change modules without disturbing field wiring, other I/O modules, or FLEX backplane power. This eliminates costly downtime and the inefficiencies of restarting a system.
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16 Select FLEX I/O Modules • • • • • • 120V AC: Input/Output and Isolated Input/Output, 8 and 16 point 220V AC: Input/Output, 8 point 24V DC: Input/Output/Combination, Sink/Source, Protected, Electronically Fused, Diagnostic, 8, 16, and 32 point 48V DC: Sink Input/Source Output, 16 point Relay: Sink/Source, 8 point Isolated inputs and outputs can be used in applications such as motor control centers where individual control transformers are used.
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Select FLEX I/O Modules 17 Digital I/O Module Summary Catalog Number Inputs Outputs Terminal Base Unit Electrical Range Module Type 1794-IB8 8 — 24V DC Nonisolated inputs 1794-IB16 16 — 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK DC Modules 1794-IB16D 1794-TB32, 1794-TB32S Group isolated inputs Diagnostics 1794-IB16XT 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK Nonisolated inputs Extended temperatures 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK Nonisolated I/O 16 1794-TB32,
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18 Select FLEX I/O Modules Digital I/O Module Summary Catalog Number Inputs Outputs Terminal Base Unit Electrical Range Module Type 1794-OC16 — 16 1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK 48V DC Nonisolated outputs 1794-OG16 5V DC 1794-OV16 24V DC 1794-OV16P Nonisolated, protected outputs 1794-OV32 32 1794-TB32, 1794-TB32S 8 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF, 1794-TB3K, 1794-TB3SK, 1794-TBNK, 1794-TBNFK Nonisolated inputs in groups Relay Modules 1794-OW8 — 1794
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Select FLEX I/O Modules 19 Input Filter Times – DC Modules Filter Times for Inputs Maximum Times (ms) OFF to ON and ON to OFF 1794-IB8, 1794-IB16, 1794-IB32, 1794-IV16, 1794-IC16, 1794-IB10XOB6, 1794-IB16XOB16P Filter time 0 (default) 0.25 1 0.
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20 Select FLEX I/O Modules Modules Specifications The following section shows more detailed module specifications in comparative groups to facilitate your selection based on your requirements.
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Select FLEX I/O Modules 21 1794-IM8 Derating Curve Vin On-State Voltage (V AC) Ambient Temperature °C The area within the curve represents the safe operating range for the module under various conditions of user supplied 220V AC supply voltages and ambient temperatures. = All mounting positions (including normal horizontal, vertical, inverted horizontal) safe operating range.
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22 Select FLEX I/O Modules Digital AC Output Comparison Specification 1794-OA8, 1794-OA8I 1794-OA16 Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.
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Select FLEX I/O Modules 23 1794-OM8 Derating Curve Vin On-State Voltage (V AC) Ambient Temperature °C The area within the curve represents the safe operating range for the module under various conditions of user supplied 220V AC supply voltages and ambient temperatures.
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24 Select FLEX I/O Modules Digital DC Input Comparison Specification 1794-IB8, 1794-IB16, 1794-IB16XT 1794-IV16 1794-IB32 1794-IV32 Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.
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Select FLEX I/O Modules 25 1794-IB32 Derating Curve Vin On-State Voltage (V DC) Ambient Temperature °C The area within the curve represents the safe operating range for the module under various conditions of user supplied 24V DC supply voltages and ambient temperatures.
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26 Select FLEX I/O Modules FLEX I/O Digital DC Output Modules • 1794-OB8 and 1794-OB16 provide 16 sourcing 1/2 Amp outputs (8 for the 1794-OB8) over a wide 10…31.2V DC input voltage range. • 1794-OV16 is the sinking version of the 1794-OB16. • 1794-OV32 is the 32 output version of the 1794-OV16. • 1794-OC16 is the 48V DC version of the 1794-OB16. • These modules are not fused. External fusing is strongly recommended or use protected output modules. Module outputs are not fused.
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Select FLEX I/O Modules 27 Digital DC Output Comparison Specification 1794-OB8 Thermal dissipation, max 11.2 BTU/hr @31.2V DC 1794-OB16 1794-OV16 1794-OV32 1794-OG16 1794-OC16 18.1 BTU/hr @31.2V DC 14.3 BTU/hr @ 31.2V DC 8.53 BTU/hr @ 31.2V DC 3.41 BTU/hr @ 5.5V DC 12.6 BTU/hr @ 60V DC Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.
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28 Select FLEX I/O Modules Digital DC Protected Output Comparison Specification 1794-OB16P, 1794-OB16PXT Current, on-state output, max Leakage current, off-state output, max Output surge current, max 500 mA per channel, 8 A per module 0.5 mA Output delay time, OFF to ON, max Output delay time, ON to OFF, max External DC supply voltage range External DC supply current range Power dissipation, max Thermal dissipation, max Dimensions (HxWxD), approx Isolation voltage 1794-OB8EP, 1794-OB8EPXT 2.
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Select FLEX I/O Modules 29 Surge Current — A 1794-OB8EP Output Minimum Surge Time — ms FLEX I/O Digital DC Diagnostic Modules 1794-IB16D is the diagnostic version of the 1794-IB16. 1794-OB16D is the diagnostic version of the 1794-OB16. The modules can detect open wire, short circuit, and reverse polarity of external power.
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30 Select FLEX I/O Modules Digital DC Diagnostic Input Module Specification 1794-IB16D Current, sensor source, max 50 mA Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed Isolation voltage 50V continuous, I/O to system Tested to 2121V DC for 1 s, I/O to system No isolation between individual channels (1) See 1794-IB16D Derating Curves.
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Select FLEX I/O Modules 31 1794-IB16D Derating Curves Input Voltage Input Voltage (V) Ambient Temperature °C Sensor Power Sensor Power Current (mA) Ambient Temperature °C Publication 1794-SG002D-EN-P - May 2012
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32 Select FLEX I/O Modules FLEX I/O Digital DC Combination Modules The 1794-IB16XOB16P module has outputs that are self-protected against shorts, overload, and over temperature similar to the 1794-OB16P module. The 1794-IB10XOB6 module requires the use of external fusing for individual outputs. The 1794-IB10XOB6XT module is the extended temperature version of the 1794-IB10XOB6 module.
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Select FLEX I/O Modules 33 Digital DC Combination Modules 1794-IB16XOB16P(3) Specification 1794-IB10XOB6, 1794-IB10XOB6XT(2) Voltage, off-state output, max 31.2V DC Leakage current, off-state output, max 0.5 mA Output delay time, OFF to ON, max(1) 0.5 ms Output delay time, ON to OFF, max 1.0 ms Output surge current, max 4 A for 50 ms repeatable every 2 s Voltage, off-state input, max 5.0V DC Current, on-state input, min 7.1 mA Current, off-state input, min 1.
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34 Select FLEX I/O Modules The 1794-OW8XT module is the extended temperature version of the 1794-OW8 module. The module is conformal coated. Digital Contact Output Modules Specification 1794-OW8, 1794-OW8XT Number of outputs 8 Terminal base unit 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF, 1794-TB3K, 1794-TB3SK, 1794-TBNKF External DC supply voltage range 19.2…31.
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Select FLEX I/O Modules FLEX I/O Analog, Thermocouple and RTD Modules 35 Choose analog, thermocouple, or RTD I/O modules when you need: • Individually configurable channels allow the module to be used with a variety of sensors. • On-line configuration. Modules can be configured in RUN mode using programming software or the control program. This allows you to change configuration while the system is operating.
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36 Select FLEX I/O Modules Analog I/O Module Summary Catalog Number Inputs Outputs Terminal Base Unit Module Type 1794-IE8 8 — 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, 1794-TB3K, 1794-TB3SK, 1794-TB3TK, 1794-TB3TSK Selectable, non-isolated inputs 1794-TB3G, 1794-TB3GS, 1794-TB3GK, 1794-TB3GSK Single-ended, non-isolated, HART-enabled inputs 1794-IE8XT 1794-IE8H 1794-IE12 12 1794-IF4I 4 Single-ended inputs — 1794-IF4IXT 1794-IF8IH 8 Selectable, non-isolated inputs, Extended t
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Select FLEX I/O Modules Modules Specifications 37 The following section shows more detailed module specifications in comparative groups to facilitate your selection based on your requirements. FLEX I/O Analog Input Modules Analog Input Comparison Catalog Number Input Signal Range Accuracy Drift with Temperature External DC Supply Current, Nom Power Thermal Dissipation, Dissipation, Max Max 1794-IE8(1) 4…20 mA 0…20 mA ±10V 0…10V Current Input: 0.0407% Full Scale/°C Voltage Input: 0.
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38 Select FLEX I/O Modules 1794-IE8 and 1794-IE8XT Analog 8 Input Module The 1794-IE8 is a voltage/current measurement module that works with a variety of input sensors to measure input voltage in ±10V range or input current in the 0…20 mA range. Each channel is individually configurable for the desired input range. Use the 1794-IE8 with 2-, 3-, and 4-wire input sensor field devices. The 1794-IE8XT module is the extended temperature version of the 1794-IE8 module. The module is conformal coated.
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Select FLEX I/O Modules 39 1794-IE8H HART Enabled Analog 8 Input Module The 1794-IE8H is a HART enabled analog input module that works with HART enabled input sensors with input current in the 0…20 mA range. Use the 1794-IE8H with 2 or 3 wire transmitters. This module provides wire-off detection on a per-channel basis. The HART analog module can only be used on ControlNet or EtherNet/IP networks with one HART field device per channel.
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40 Select FLEX I/O Modules Analog 12 Input Module Specification 1794-IE12 Input resistance Current input: <100 Ω Voltage input: >1 MΩ Data format 16 bits, 2’s complement Input conversion type Successive approximation Input conversion rate 8.0 ms all channels Normal mode rejection ratio Voltage/current terminal: -3 dB @ 0.05 Hz -20 dB/decade -52 dB @ 50 Hz -54 dB @ 60 Hz Voltage/current terminal with Quick Step: -3 dB @ 1.
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Select FLEX I/O Modules 41 Isolated Analog Input Modules Specification 1794-IF4I, 1794-IF4IXT Input resolution 16 bits – unipolar 15 bits + sign – bipolar 0.320 μA/cnt – unipolar 0.640 μA/cnt – bipolar 0.156 mV/cnt – unipolar 0.313 mV/cnt – bipolar Input resistance Current input: <100 Ω(1) Voltage input: >10 MΩ Data format 2’s complement 2’s complement percent binary offset binary Input conversion type Sigma Delta Input conversion rate 2.5/5.0/7.
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42 Select FLEX I/O Modules 1794-IF8IH HART Enabled Analog 8 Input Module The 1794-IF8IH accepts up to 8 analog inputs. The inputs are isolated and will accept current in either of the following two ranges: 4…20 mA or 0…20 mA. The default input range is 0…20 mA. The inputs have both fixed hardware filters and selectable firmware digital filters.
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Select FLEX I/O Modules 43 1794-IR8 RTD Input Module The 1794-IR8 is a temperature-measuring module that accepts 2- and 3-wire RTDs. use the 1794-IR8 in applications where channel fast-update rate is not required. If you need channel fast-update rates, use the 1794-IRT8 module described on page 44. RTD Input Module Specification 1794-IR8 Input resolution 16 bits across 435 Ω Sensors supported Resistance: 100 Ω Pt μ = 0.00385 Euro (-200…870 °C) 100 Ω Pt μ = 0.003916 U.S. (-200…630 °C) 200 Ω Pt μ = 0.
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44 Select FLEX I/O Modules User Applied 24V DC Supply 1794-IR8 Derating Curve Ambient Temperature °C The area within the curve represents the safe operating range for the module under various conditions of user supplied 24V DC supply voltages and ambient temperatures.
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Select FLEX I/O Modules 45 Thermocouple/RTD Input Module Specification 1794-IRT8 and 1794-IRT8XT Input resolution 14 bits Supported RTD types Resistance: 100 Ω Pt μ = 0.00385 Euro (-200…870 °C) 100 Ω Pt μ = 0.003916 U.S. (-200…630 °C) 200 Ω Pt μ = 0.00385 Euro (-200…400 °C) 200 Ω Pt μ = 0.003916 U.S. (-200…400 °C) 100 Ω Nickel μ = 0.00618 (-60…250 °C) 120 Ω Nickel μ = 0.00672 (-60…320 °C) 200 Ω Nickel μ = 0.00618 (-60…200 °C) 10 Ω Copper μ = 0.
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46 Select FLEX I/O Modules Thermocouple/RTD Input Module Specification 1794-IRT8 and 1794-IRT8XT Data format °C (implied decimal point XXX.X) °F (implied decimal point XXX.X) °K (implied decimal point XXX.X) -32767…32767 0…65535 0…5000 (Ω mode) (implied decimal point XXX.X) -4000…10000 (mV mode) (implied decimal point XXX.XX) Overall drift with temperature, max Series A: 150 ppm/ °C of span Series B: 50 ppm/ °C of span Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.
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Select FLEX I/O Modules 47 Thermocouple/mV Input Module Specification 1794-IT8 Data format 16 bits, 2’s complement; Offset binary (unipolar) Settling time 100% of final value available at system throughput rate Normal mode rejection ratio 60 dB @ 60 Hz Common mode rejection ratio -115 dB @ 60 Hz -100 dB @ 50 Hz Common mode input range ± 10V Accuracy(1) With filter (max): 0.025% Full Scale @ 24 °C (±0.5 °C) Without filter (max): 0.05% Full Scale @ 24 °C (±0.
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48 Select FLEX I/O Modules 1794-IE8XOE4 8 Input/4 Output Analog Combination Module The 1794-IE8XOE4 is a combination module with 8 inputs and 4 outputs. Inputs can be configured individually for different modes, as can outputs. Inputs accept signals from 2, 3, and 4 wire input sensors in the ranges of ±10V or 0… 20 mA. Outputs produce signals in the range of ±10V or 0…20 mA.
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Select FLEX I/O Modules 49 1794-IE4XOE2 and 1794-IE4XOE2XT 4 Input/2 Output Analog Combination Modules The 1794-IE4XOE2 is a combination module with 4 inputs and 2 outputs. Inputs can be configured individually for different modes. Inputs accept signals from a variety of inputs sensors (2-, 3-, and 4-wire) in the range of ±10V or 0…20 mA. Outputs are also individually configurable for different modes. Outputs produce signals in the range of ±10V or 0…20 mA.
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50 Select FLEX I/O Modules 4 Input / 2 Output Analog Combination Modules Specification 1794-IE4XOE2, 1794-IE4XOE2XT Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed Temperature, operating 1794-IE4XOE2: 0…55 °C (32…131 °F) 1794-IE4XOE2XT: -20…70 °C (-4…185 °F) (1) Includes offset, gain, non-linearity and repeatability error terms.
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Select FLEX I/O Modules 51 2 Input/2 Output Isolated Combination Module Specification 1794-IF2XOF2I, 1794-IF2XOF2IXT Normal mode rejection ratio -3 dB @ 12 Hz (300 Hz conversion rate) -80.0 dB @ 50 Hz (300 Hz conversion rate) -3 dB at 6 Hz (150 Hz conversion rate) -80 dB at 60 Hz (150 Hz conversion rate) Accuracy(1) Current input or output: 0.1% Full Scale @ 25 °C Voltage input or output: 0.1% Full Scale @ 25 °C Accuracy drift with temperature Current input: 0.0038% Full Scale/°C Voltage input: 0.
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52 Select FLEX I/O Modules Analog Output Comparison Catalog Number Output Signal Range External DC Supply Current, Nom Power Dissipation, Max Thermal Dissipation, Max 1794-OF4I 4…20 mA 0…20 mA ±10V 0…10V ±5V 0…5V 210 mA @ 24V DC 4.7 W @ 31.2V DC 16 BTU/hr @ 31.2V DC 1794-OF8IH 4…20 mA (user configurable) 0…20 mA (user configurable) 450 mA @ 24V DC 5.0 W @ 31.2V DC 6.8 BTU/hr @ 31.2V DC 1794-IE8XOE4(1) 4…20 mA 0…20 mA ±10V 0…10V 140 mA @ 24V DC; 280 mA @ 10.0V DC 3.0 W @ 31.2V DC; 2.
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Select FLEX I/O Modules 53 Analog 4 Input Modules Specification 1794-OE4 1794-OE4XT Accuracy drift w/temp Current input: 0.0069% Full Scale /°C Voltage input: 0.0045% Full Scale/°C Calibration None required Isolation voltage 50 (continuous), I/O to system Type tested at 850V DC for 1 s, I/O to system Type tested at 850V DC for 60 s (for 1794-OE4XT only) No isolation between individual channels Power dissipation, max 4.5 W @ 31.2V DC Thermal dissipation, max 15.3 BTU/hr @ 31.
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54 Select FLEX I/O Modules HART Enabled Analog 8 Output Module Specification 1794-OE8H Calibration — Isolation voltage 50V (continuous), Basic Insulation Type No isolation between individual channels Power dissipation, max 6.1 W Thermal dissipation, max 20.8 BTU/hr Wire size 0.34... 2.5 mm2 (22...12 AWG) solid or stranded shielded copper wire rated at 75 °C (167 °F) or greater 1.2 mm (3/64 in.
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Select FLEX I/O Modules 55 Analog 12 Output Module Specification 1794-OE12 Power dissipation, max 4.0 W @ 31.2V DC 4.3 W @ 24V DC 4.0 W @ 10.0V DC Thermal dissipation, max 14.7 BTU/hr @ 24V DC Wire size 0.34... 2.5 mm2 (22...12 AWG) solid or stranded shielded copper wire rated at 75 °C (167 °F) or greater 1.2 mm (3/64 in.) insulation max Wire category 2 – on signal ports 2 – on power ports(1) Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 3.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.
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56 Select FLEX I/O Modules Isolated Analog 4 Output Module Specification 1794-OF4I, 1794-OF4IXT Power dissipation, max 4.7 W @ 31.2V DC Thermal dissipation, max 16 BTU/hr @ 31.2V DC Wire size 0.34... 2.5 mm2 (22...12 AWG) solid or stranded shielded copper wire rated at 75 °C (167 °F) or greater 1.2 mm (3/64 in.) insulation max Wire category 2 – on signal ports 3 – on power ports(2) Dimensions (HxWxD), approx 1794-OF4I: 46 x 94 x 53 mm (1.8 x 3.7 x 3.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.
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Select FLEX I/O Modules 57 HART Enabled Isolated Analog 8 Output Module Specification 1794-OF8IH Thermal dissipation, max 16 BTU/hr @ 31.2V DC Wire size 0.34... 2.5 mm2 (22...12 AWG) solid or stranded shielded copper wire rated at 75 °C (167 °F) or greater 1.2 mm (3/64 in.) insulation max Wire category 2 – on signal ports 3 – on power ports(1) Dimensions (HxWxD), approx 46 x 94 x 75 mm (1.8 x 3.7 x 2.95 in.) 94 x 94 x 91 mm (3.7 x 3.7 x 3.6 in.
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58 Select FLEX I/O Modules FLEX I/O Counter Modules In order to decide which FLEX I/O counter module would best suit your application needs, you should identify the following: • What type of application the module will be used for • What field devices, signal levels, and signal type are being connected to the counter module Counter Module Comparison Catalog Number Application Network Capability Number External DC Supply Power of Current, Nom Dissipation, Max Inputs/ Outputs Thermal Dissipation, Max
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Select FLEX I/O Modules 59 1794-IJ2 and 1794-IJ2XT 24V DC Input Frequency Module The 1794-IJ2 is essentially a tachometer with the capability of reporting frequency, acceleration, and direction. Outputs are activated by alarms. Input devices range from magnetic pickup to flowmeters, to incremental encoders to proximity detectors. This intelligent I/O module is designed to perform high-speed frequency algorithms. The module provides 2 frequency inputs, 2 gate inputs, and 2 outputs.
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60 Select FLEX I/O Modules The frequency input module isolated power supply consists of 1 isolated 24V DC power supply that provides 2 current limited outputs of 30 mA maximum (1 for each channel). 24V DC Input Frequency Module Publication 1794-SG002D-EN-P - May 2012 Specification 1794-IJ2, 1794-IJ2XT Processing time ≤ 4 ms Input frequency, max 1…32 kHz w/sine wave 1…32 kHz w/square wave input Frequency value, max 32,767 or 3,276.
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Select FLEX I/O Modules 61 24V DC Input Frequency Module Specification 1794-IJ2, 1794-IJ2XT Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 3.1 in.) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed Temperature, operating 1794-IJ2: 0…55 °C (32…131 °F) 1794-IJ2XT: -20…70 °C (-4…185 °F) (1) Current Limited: All outputs can be on simultaneously without derating.
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62 Select FLEX I/O Modules 2 Channel Very High Speed Counter Module Specification 1794-VHSC Current, on-state output, max 5V operation – 0.5 A 12…24V operation – 1.0 A Current per output pair, max 5V operation – 0.9 A 12…24V operation – 4.0 A Short circuit current 5V operation – 0.9V DC @ 0.5 A(1) 12…24V operation – 0.9V DC @ 1.0 A Output delay time, OFF to ON 25 μs (load dependent) Output delay time, ON to OFF 150 μs (load dependent) Dimensions (HxWxD), approx 46 x 94 x 53 mm (1.8 x 3.7 x 3.
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Select FLEX I/O Modules 63 1794-ID2 2 Input Pulse Counter Module The 1794-ID2 module is a 2-channel counter used in applications where pulse counting is required. Typical input devices include quadrature incremental encoders with or without reference and/or gate function and pulse transmitters. You can use one or two pulse trains.
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64 Select FLEX I/O Modules 1794-IP4 4 Input Pulse Counter Module The pulse counter modules perform high-speed scaling, calculation operations for various industrial applications. Some sample applications include: • quantity counting • speed calculation • flow monitoring All the input devices for the pulse counter module should be able to provide the input signal of 6V amplitude. The 1794-IP4 has a 6V minimum threshold for an input ON condition and a maximum 3V threshold for an input OFF condition.
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Section 1.4 Select a FLEX I/O Terminal Base Unit Step 3 – Select: the appropriate terminal base unit for your module and system Each FLEX I/O module requires a terminal base unit that snaps onto the DIN rail to the right of the I/O adapter. The terminal bases provide terminal connection points for the I/O wiring and plug together to form the backplane. They are available with screw, clamp, or spring terminations.
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66 Select a FLEX I/O Terminal Base Unit General Specification Comparison Catalog(1) Termination Connections Type Used in Applications Current Wiring Capacity, Category max Purpose 1794-TB3T Cage clamp, temperature 16 I/O; 10 common; 4 +V; 8 chassis ground; 2 sets of CJC for temperature modules Up to 132V AC/156V DC 10 Module dependent A cage clamp terminal base to be used with the 1794-IT8 or 1794-IRT8 module (when used in thermocouple mode) – also provides chassis ground connections for the 17
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Section 1.5 Select a FLEX I/O Power Supply Step 4 – Select: if power consumption exceeds the maximum for a single power supply, install additional power supplies FLEX I/O modules are interfaced to the I/O link through a FLEX I/O adapter module with a built-in 24V DC input power supply. The FLEX I/O modules receive power from the adapter/power supply through the backplane. The 120V AC to 24V DC power supply (1794-PS13 or 1794-PS3) is also available for powering the adapter/power supply.
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68 Select a FLEX I/O Power Supply The 1606 switched mode power supplies are capable of supplying a maximum of up to 40 A at 24V DC and can be used as an alternative when more power is needed. Digital Input Modules require supplied 24V DC (19.2…31.2V DC) and consume the currents listed in the module specifications. Digital Output Modules require supplied 24V DC (19.2…31.2V DC) and consume the currents listed in the module specifications plus the total current consumed by their loads.
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Select a FLEX I/O Power Supply 69 1794-PS3 AC/DC output current load real power (Watts apparent power (Watts) transformer load (VS) 1794-PS13 AC/DC output current load (Amps) real power (Watts apparent power (Watts) transformer load (VS) = real power (Watts) X 25 Publication 1794-SG002D-EN-P - May 2012
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70 Select a FLEX I/O Power Supply Notes: Publication 1794-SG002D-EN-P - May 2012
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Section 2.1 About the FLEX Ex I/O Systems 1797 FLEX Ex I/O Overview FLEX Ex I/O offer: Adapter Terminal base Bus connectors I/O module Keyswitch FlexBus connectors 24V DC field power Terminal strips FLEX Ex I/O leverages advanced technologies allowing the application to move to a distributed architecture in the hazardous area. We have taken our experience gained with the standard FLEX I/O system and used it to create an intrinsically safe system with the same look, feel, and ease of use.
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72 About the FLEX Ex I/O Systems Plug the I/O module into the terminal base. Use the module to connect to the I/O bus and field devices. Remove and insert modules under power. No direct wiring to the module enables you to change modules without disturbing field wiring or system power. Mix and match I/O modules. Wide variety of digital, analog, temperature, frequency, and HART modules. FlexBus Isolator allows connection to standard FLEX I/O adapters and I/O thus providing a choice of other networks.
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About the FLEX Ex I/O Systems FLEX Ex Typical Configurations 73 The following are typical configurations of FLEX Ex I/O in an intrinsically safe system: • FLEX Ex I/O modules are interfaced through a ControlNet Ex I/O adapter module to a coax ControlNet segment that is confined to the hazardous area.
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74 About the FLEX Ex I/O Systems Publication 1794-SG002D-EN-P - May 2012
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About the FLEX Ex I/O Systems Entity-Based Architecture 75 Entity parameters provide a system of quantifying and matching safe levels for voltage, current, inductance, and capacitance when connecting intrinsically safe field devices and system devices together. Configuration of the FLEX Ex system is based on the entity parameter method. Using entity parameters allows high system flexibility in matching field and system devices. This provides maximum utility to the IS system designer and installer.
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76 About the FLEX Ex I/O Systems Typical Gas North American Gas Group IEC Gas Group Acetylene A IIC Hydrogen B Ethylene C IIB Propane D IIA Methane(1) D I Metal dust E — Coal dust F Grain dust G (1) Mining applications under jurisdiction of MSHA. Use in North American Hazardous Locations FLEX Ex modules are rated for installation in Class I Division 1 & 2, Groups A-D hazardous areas.
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About the FLEX Ex I/O Systems 77 As always, observe local code requirements when applying your FLEX Ex application. For more information and full certification, refer to the FLEX Ex System Certification Reference Manual, publication 1797-RM001.
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78 About the FLEX Ex I/O Systems Specify a FLEX Ex System ✓ Follow these steps as you specify your FLEX Ex I/O system: Step See 1 Select an adapter and distribution method Choose an adapter and fiber hub or coax barrier to Select FLEX Ex I/O Communication distribute FLEX Ex into the hazardous area. Or, choose a Adapters and Distribution Method bus isolator pair to connect to various networks.
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Section 2.2 Select FLEX Ex I/O Communication Adapters and Distribution Method Step 1 – Select: the communication adapter for the ControlNet Ex network the coax barrier to distribute into hazardous areas The diagnostic capabilities and determinism of the ControlNet network make it an ideal choice for distributing I/O into hazardous area applications.
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80 Select FLEX Ex I/O Communication Adapters and Distribution Method Network Comparison by Application Requirement Catalog Number. Description Agency Certification Intrinsically Safe Output Characteristics Intrinsically Safe Power Supply (V, -V) See page: 1797-RPA ControlNet Ex modular repeater adapter Class I Division 1 Groups A…D T4 Class I Zone 1 AEx ib IIC T4 Class II Division 1 Groups E, F, G; Class III(1) 30 pin male TTL bus connector Uo ≤ 5.4V DC Io ≤ 201mA Po ≤ 1.09 W Lo ≤ 0.
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Select FLEX Ex I/O Communication Adapters and Distribution Method 81 1797-ACNR15 Dual Media ControlNet Ex 1.5 Adapter The 1797-ACNR15 interfaces FLEX Ex I/O modules to a coax segment of a ControlNet Ex I/O link. It provides power to the backplane to run bus interface circuitry aboard I/O modules and is capable of dual ControlNet Ex cable media.
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82 Select FLEX Ex I/O Communication Adapters and Distribution Method 1797-RPFM ControlNet Ex 3 km Fiber Media Port Adapter The 1797-RPFM (part of the fiber repeater hub) functions as a non-intelligent fiber to backplane conversion device and converts glass fiber infrared LED media signals to backplane signals for use by the 1797-RPA repeater module. FLEX I/O DeviceNet Adapter Specifications Attribute 1797-RPFM Communication interface Fiber optic cable Fiber type 62.
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Select FLEX Ex I/O Communication Adapters and Distribution Method 83 FLEX I/O Remote I/O Adapter Specifications Attribute 1797-BCNR Temperature, operating -20…70°C (-4 …185°F) ControlNet Ex system characteristics Uo = 7V Io = 55 mA @ 52 KHz Po = negligible Non Ex ControlNet characteristics Un = 5V Um = 253V AC I = not defined P = not defined ControlNet communication rate 5 Mbps Transmission attenuation -7.84 dB Noxious Gas exposure — Dimensions (HxWxD), approx. 70 x 100 x 90 mm (2.76 x 3.
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84 Select FLEX Ex I/O Communication Adapters and Distribution Method 1797-BIC Bus Isolator Module and 1797-CEC FlexBus Connector The bus isolator modules, 1797-BIC and -CEC, allow you to configure FLEX Ex modules and FLEX I/O modules on the DIN Rail when attached to the same adapter and grouped together on appropriate sides of the bus isolator module. This highly flexible, cost-effective solution combines intrinsically safe and non-intrinsically safe systems.
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Select FLEX Ex I/O Communication Adapters and Distribution Method 85 When combining 1794 FLEX I/O and 1797 FLEX Ex I/O, the 1794 FLEX I/O modules are placed to the left of the 1797-BIC and -CEC modules while the 1797 FLEX Ex I/O modules are placed on the right. IMPORTANT A FLEX Ex power supply (1797-PSxxx) must be used to power the 1797 FLEX Ex I/O regardless of where they are located.
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86 Select FLEX Ex I/O Communication Adapters and Distribution Method Notes: Publication 1794-SG002D-EN-P - May 2012
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Section 2.3 Select FLEX Ex I/O Modules Step 2 – Select: I/O modules based on field devices FLEX Ex follows a producer/consumer model for remote I/O. Input modules produce data for the system. Controllers, output modules, and intelligent modules produce and consume data. The producer/consumer model multicasts data. This means that multiple nodes can consume the same data at the same time from a single device. FLEX Ex I/O modules offer 2 through 16 I/O each.
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88 Select FLEX Ex I/O Modules Modules Specifications The following section shows more detailed module specifications in comparative groups to facilitate your selection based on your requirements.
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Select FLEX Ex I/O Modules 89 16 Point Non-isolated NAMUR Input Module Specification 1797-IBN16 Intrinsically safe input type II (1)2G Ex ib[ia] IIC T4 Class I, Div. 1, Groups A-D and Class I, Zone 1, AEx ib/[ia] IIC Noxious gas exposure Tested to severity level G3, ISA-S71.04-1985 FLEX Ex power consumption 2.8 W @ 9V Power dissipation 2.8 W Thermal dissipation, max 9.6 BTU/hr Dimensions (HxWxD), approx 46 x 94 x 75 mm (1.8 x 3.7 x 2.95 in.) 94 x 94 x 91 mm (3.7 x 3.7 x 3.6 in.
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90 Select FLEX Ex I/O Modules 24V DC 4 Point Non-isolated Source Output Module Specification 1797-OB4D Number of outputs 4 Output load range 30…5000 Ω Fault detection Fault bits in data table and LED (per channel) blinking red (1 Hz) Protection Overload Output delay time, OFF to ON ≤ 1.2 ms Output delay time, ON to OFF ≤ 1.2 ms Intrinsically safe output type II (1)2G Ex ib[ia] IIC T4 Class I, Div.
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Select FLEX Ex I/O Modules Analog Modules 91 Choose analog I/O modules when you need: • Configurable channels allow the module to be used with a variety of sensors. • On-board scaling eliminates the need to scale the data in the controller. Controller processing time and power are preserved for more important tasks, such as I/O control, communications, or other user-driven functions. • On-line configuration. Modules can be configured in RUN mode using the programming software or the control program.
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92 Select FLEX Ex I/O Modules Analog I/O Module Summary Catalog Number Inputs Outputs Terminal Base Unit Signal Range Module Type — 8 1797-TB3, 1797-TB3S 0…20 mA 4…20 mA 16-bit single-ended, nonisolated outputs Output Modules 1797-OE8 1797-OE8H Module Specifications 16-bit single-ended, nonisolated outputs with HART capability The following section shows more detailed module specifications in comparative groups to facilitate your selection based on your requirements.
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Select FLEX Ex I/O Modules 93 Schematic Drawing of the 1797-IE8 Module Power supply +V Valve -V FlexBus 286 Ω 21V Bus 4…20 mA Xmit + Isolated power 4…20 mA Xmit μC sig 22 Ω - FLEX Ex Analog Input Comparison Specification 1797-IE8 1797-IE8NF 1797-IE8H Input resolution 16 bits Input signal range 0…22 mA Transfer characteristics, temperature drift 0.1% of output signal range at 20 °C (68 °F) Functional data range > 15V @ 22 mA > 21.
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94 Select FLEX Ex I/O Modules 1797-IRT8 8 Point 16-bit Non-isolated RTD Thermocouple/mV Input Module • input channels referenced to a single common – RTD mode – RTD types Pt100, Pt200, Ni100, Ni200, Ni120, Cu10 – 2-, 3-, and 4-wire connection – sensor lead breakage and short circuit detection all 4 leads – measuring resistance 0…500 Ω – accuracy: 0.
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Select FLEX Ex I/O Modules 95 8 Point 16-bit Non-isolated RTD Thermocouple/mV Input Module HART Interface Modules Specification 1797-IRT8 Input signal range 0…500 Ω -40…100 mV TC RTD Settling time 8 ms to 99% of final value (mV mode, °F thermocouple) Open RTD detection Out of range upscale reading Lead resistance compensation < 15 Ω total Transfer characteristics, accuracy RTD: 0.1% of span @ 20 °C, filter cutoff < 1 Hz Thermocouple: 0.
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96 Select FLEX Ex I/O Modules FLEX Ex I/O Analog Output Modules 1797-OE8 and 1797-OE8H (HART) 8 Point 13-bit Single-ended Non-isolated Analog 8 Output Module • Eight dual-ended output channels referenced over sense resistors to a single common • Functional data: – normal output – current = 4...20 mA, full current – range = 0...
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Select FLEX Ex I/O Modules 97 8 Point 13-bit Single-ended Non-isolated Analog 8 Output Modules Specification 1797-OE8 1797-OE8H Transfer characteristics, accuracy 0.1% of output signal at 20 °C (68 °F) Transfer characteristics, temperature drift 0.010%/C of output signal range Noxious gas exposure Tested to severity level G3, ISA-S71.04-1985 FLEX Ex power consumption 6.3 W @ 9V 6.1 W @ 9V Power dissipation, max 5.4 W 6.1 W Thermal dissipation, max 18.4 BTU/hr 20.
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98 Select FLEX Ex I/O Modules 1797-OE8H Output Voltage/Current Capability ... Voltage mA Counter I/O Module Ideal for applications requiring rotational control, the FLEX Ex counter is essentially a tachometer with the capability of reporting frequency, acceleration, and direction. Outputs are activated by alarms. Input devices range from magnetic pickup to flowmeters, to incremental encoders to proximity detectors. This intelligent I/O module is designed to perform high-speed frequency algorithms.
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Select FLEX Ex I/O Modules • • • • • 99 Calculate frequency on time interval or input count Programmable scaling Acceleration value calculated Maximum frequency or acceleration alarms All channels updated to the backplane every ≤ 4 ms (according to sampling time) Schematic Diagram for the 1797-IJ2 Module supply FlexBus Vortex Jumper Magnetic Jumper Magnetic Audible S 2 Input Frequency Counter Module Specification 1797-IJ2 Number of inputs 2 Flowmeter input signal threshold 3V or 6V, selec
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100 Select FLEX Ex I/O Modules 2 Input Frequency Counter Module Publication 1794-SG002D-EN-P - May 2012 Specification 1797-IJ2 Input frequency range 1.0…32,767 Hz Frequency resolution, min Sampling Time – Accuracy 2 ms – 0.043% 4 ms – 0.033% 5 ms – 0.031% 10 ms – 0.027% 20 ms – 0.025% 50 ms – 0.023% 100 ms – 0.023% 200 ms – 0.023% 500 ms – 0.023% 1000 ms – 0.
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Select FLEX Ex I/O Modules 101 Notes: Publication 1794-SG002D-EN-P - May 2012
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102 Select FLEX Ex I/O Modules Publication 1794-SG002D-EN-P - May 2012
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Section 2.4 Select a FLEX Ex I/O Terminal Base Unit Step 3 – Select: the appropriate terminal base unit for your module and system Each FLEX Ex I/O module requires a FLEX Ex I/O terminal base unit that snaps onto the DIN rail to the right of the I/O adapter. The terminal bases provide terminal connection points for the I/O wiring and plug together to form the backplane. They are available with screw, clamp, or spring terminations.
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104 Select a FLEX Ex I/O Terminal Base Unit Wiring when total module current draw is greater than 8.5 W Combination Daisy-chaining and Separate Power Supplies. +V, -V <8.5 W +V, -V <8.5 W Separate power supply can be brought in on the last module in the chain if necessary. Make sure you do not jumper to the adapter if using this method. Use this method when the total current draw through terminal base units is greater than 8.5 W.
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Section 2.5 Select a FLEX Ex I/O Power Supply Step 4 – Select: if power consumption exceeds the maximum for a single power supply, install additional power supplies The power supply is an essential component in the operation of an intrinsically safe system. It must isolate the unsafe incoming power from the control system and limit the available energy to IS-safe levels.
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106 Select a FLEX Ex I/O Power Supply E Type Power Supply 1797-PS1E or 1794-PS2E2 N Type Power Supply 1797-PS1N or 1797-PS2N2 Understanding System Planning Part of system planning is determining what modules are needed for the application, how many power supplies are needed, how to best partition the system, and where to locate the system cabinets. A key task in the development cycle is determining the number of power supply outputs (thus power supplies) you will need.
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Select a FLEX Ex I/O Power Supply 107 The total number of power supplies needed depends on the modules used and the total system configuration. The following illustration shows how this example may be configured.
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108 Select a FLEX Ex I/O Power Supply Assigning Power Supplies Note the amount of power each module requires and assign it to a power supply output. Continue to assign modules to the power supply output until the supply's output power rating is consumed. Each power supply output in the FLEX Ex system is rated for 8.5 W. Modules can be attached to the output until their combined power equals that number. Do not exceed the power supply maximum of 8.5 W.
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Select a FLEX Ex I/O Power Supply 109 Hazardous Area Installation The following illustration provides an example of how power supplies are arranged within the FLEX Ex system when using fiber hubs.
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110 Select a FLEX Ex I/O Power Supply 1797-PS1N and 1797-PS1E 85V…253V AC In/Quad-Ex DC Out Type of Power Input AC 1797-PS2N2 and 1797-PS2E2 24V DC In/Quad-Ex DC Out Type of Power Input DC General Specifications Summary Specification 1797-PS1N 1797-PS1E 1797-PS2N2 Intrinsically safe module Class I, Division 1, Groups A…D T4 (UL and C-UL) Class II, Division 1 Groups E…G (UL and C-UL) Class III (UL, FM and C-UL) Zone1: II 2G Ex de [ib] IIC T4 Zone 22: II 3D Ex tD A22 IP54 T90°C X Class I Division
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Select a FLEX Ex I/O Power Supply 111 General Specifications Summary Specification 1797-PS1N Input power entry 1 in NPT, ≤ 6 in conduit allowed Increased safety between power supply and seal (UL, FM and C-UL) Output connector terminals Terminals 10…17 Power supply output power (W) 34 W(1) Safe voltage, max Um 250V AC Voltage UO 1797-PS1E 1797-PS2N2 1797-PS2E2 1 in NPT, 6 in conduit allowed between power supply and seal (UL and C-UL) 1 in NPT, 0 in conduit allowed between power supply and seal
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112 Select a FLEX Ex I/O Power Supply Notes: Publication 1794-SG002D-EN-P - May 2012
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Section 3.1 Mount the FLEX System Step 6 – Select: •panel mount or DIN rail mount •appropriate number of panels or DIN rails based on the number of modules and the physical requirements •one end cap per controller system You can horizontally or vertically mount the FLEX I/O or FLEX Ex I/O system on a standard 35 mm DIN rail. The adapter and terminal base unit easily snap on the DIN rail by hand. Use a flat-blade screwdriver to remove components from the DIN rail.
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114 Mount the FLEX System When properly installed, FLEX I/O and FLEX Ex I/O are grounded through the DIN rail to chassis ground. Use a zinc-plated, yellow-chromated steel DIN rail to assure proper grounding. Using other DIN rail materials, for example, aluminum or plastic, which can corrode, oxidize, or are poor conductors can result in improper or intermittent platform grounding.
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Section 3.2 Select Optional Accessories Step 5 – Select: optional accessories for FLEX I/O and FLEX I/O XT modules 1794-CE1 and 1794-CE3 Extender Cables Use one optional 1794-CE1 – 0.3 m (1 ft) or 1794-CE3 – 0.9 m (3 ft) extender cable, per system, to arrange your system in two rows or split your system into horizontal and vertical orientation. The cable can be used between any module or between adapters and modules.
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116 Select Optional Accessories 1492-EA35 DIN Rail Locks When you use FLEX I/O modules in a high-vibration installation, and particularly when mounting the modules vertically, we recommend using DIN-rail locks (Allen-Bradley part number 1492-EA35). 1794-LBL FLEX I/O Label Kit Use the label kit to tailor the label on your FLEX I/O terminal base unit to meet your needs. The label kit includes a diecut drawing and label sheet with five labels.
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Select Optional Accessories Step 5 – Select: 117 optional accessories for FLEX Ex I/O modules 1797-BOOT ControlNet BNC Boot Use the ControlNet BNC boot, trunk isolator, and marking kit in your cable connections. The 1797-BOOT covers the BNC connector on the ControNet Ex trunk cable. The kit contains 50 pieces.
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118 Select Optional Accessories ControlNet Ex Taps 1797-TPS ControlNet Ex Straight T-Tap 1797-TPR ControlNet Ex Right-Angle T-Tap 1797-TPYS ControlNet Ex Straight Y-Tap 1797-TPYR ControlNet Ex Right-Angle Y-Tap Publication 1794-SG002D-EN-P - May 2012
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Select Optional Accessories 119 1797-XT ControlNet Ex 75Ω Terminator The terminator is sold in lots of 50. 1797-TCAP ControlNet Tap Terminator This kit contains five pieces. 1786-RG6 Coax Trunk Cable The 1786-RG6 Coax Trunk Cable can be used in Flex Ex applications in hazardous areas.
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120 Select Optional Accessories Notes: Publication 1794-SG002D-EN-P - May 2012
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Section 4.1 Related Documentation FLEX I/O and FLEX I/O XT Additional user documentation presents information according to the tasks you perform and the programming environment you use. Refer to the table for information on 1794 FLEX I/O, FLEX I/O XT publications.
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122 Related Documentation 1794 FLEX I/O and FLEX IO XT Related Publications Bases Catalog Number Description Installation Instructions User Manual 1794-TBNFK FLEX I/O D-Shell Terminal Base Units Installation Instructions 1794-IN107 — 1203-FB1 Installation 1203-FB1 FLEX I/O SCANport Base — 1203-UM000 1794-IA8 FLEX I/O AC Input Modules Installation Instructions 1794-IN102 — 1794-IM8 FLEX I/O 220V AC Input and Output Modules Installation Instructions 1794-IN104 1794-IM16 FLEX I/O 240V A
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Related Documentation 123 1794 FLEX I/O and FLEX IO XT Related Publications DC Catalog Number Description Installation Instructions User Manual 1794-IV16 FLEX I/O Digital DC Sourcing Input and Sinking Output Modules Installation Instructions 1794-IN095 — 1794-IB32 FLEX I/O Digital Input Modules Installation Instructions 1794-IN093 1794-IV32 FLEX I/O Digital Sourcing Input and Sinking Output Modules Installation Instructions 1794-IN122 1794-OB8 FLEX I/O Digital DC Sourcing Output Modules I
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124 Related Documentation 1794 FLEX I/O and FLEX IO XT Related Publications Catalog Number Description Installation Instructions User Manual 1794-OE12 FLEX I/O 12 Channel Analog Modules Installation Instructions 1794-IN106 — 1794-IE4XOE2 FLEX I/O Input, Output and Input/Output Analog Modules Installation Instructions 1794-IN100 1794-UM002 1794-IE4XOE2XT FLEX XT I/O Input, Output and Input/Output Analog Modules Installation Instructions 1794-IN125 — 1794-IE8XOE4 FLEX I/O 12 Channel Analog
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Related Documentation FLEX Ex I/O 125 Additional user documentation presents information according to the tasks you perform and the programming environment you use. Refer to the table for information on 1794 FLEX Ex I/O publications.
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126 Related Documentation Notes: Publication 1794-SG002D-EN-P - May 2012
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Rockwell Automation Support Rockwell Automation provides technical information on the Web to assist you in using its products. At http://www.rockwellautomation.com/support/, you can find technical manuals, a knowledge base of FAQs, technical and application notes, sample code and links to software service packs, and a MySupport feature that you can customize to make the best use of these tools.