MONITORING OpenComms NIC-485 USER MANUAL
TABLE OF CONTENTS 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 OpenComms Compatibility . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 2.2 2.3 Retrofit Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Self-Contained Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 User Connections for OpenComms NIC-485 . . . . . . . . . 4 2.3.1 2.3.
7.0 FIRMWARE UPDATES . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.1 7.3 Establishing Communication—Necessary Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Establishing Communication—Service Terminal Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Firmware Update Procedure . . . . . . . . . . . . . . . . . . . . . 21 8.0 EXTERNAL ENCLOSURES . . . . . . . . . . . . . . . . . . . . . . 24 8.1 8.2 Power Connection. . .
FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Null modem cable diagram . . . . . . . . . . . . . . . . . . . . . . . . . 5 NIC-485 main menu in HyperTerminal . . . . . . . . . . . . . . . 6 LED Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv
Introduction 1.0 INTRODUCTION The OpenComms NIC-485 transforms Liebert units into manageable nodes within your BMS systems. The OpenComms NIC-485 contains a standard EIA-485 (two-wire) port designed to support viewing and management through Modbus RTU for building management systems and SiteScan. This standard open protocol allows simple integration into your monitoring system, leveraging prior infrastructure investments and established procedures. 1.
Introduction Table 1 Specifications Electrical Requirements Voltage 18 to 24VAC 50/60 Hz, Single Phase 12 to 36VDC Power 6VA maximum Environmental Conditions, °F (°C) Operating Ambient Temperature 41 to 104 (5 to 40) Storage Ambient Temperature -4 to 140 (-20 to 60) Relative Humidity 10% to 90% RH (Non-condensing) Dimensions, Inches (mm) Unit Only 7 x 4 x 1.5 (178 x 102 x 38) As Shipped 9.75 x 7.0 x 2.5 (248 x 178 x 64) Weight, lb (kg) Unit Only 0.4 (0.2) As Shipped 1.3 (0.
Installation 2.0 INSTALLATION The OpenComms NIC-485 may be ordered as a factory-installed option, and it may be installed as a kit for field retrofit to existing Liebert units or as a self-contained unit in its own enclosure. If ordered as a factory-installed option, proceed to 2.3 - User Connections for OpenComms NIC-485. 2.1 Retrofit Kit As a retrofit kit, the circuit board is secured to a metal mounting plate.
Installation 2.3 User Connections for OpenComms NIC-485 Since the OpenComms NIC-485 can use simultaneous connections two user connections may be required: • Modbus 485 connection • Temporary serial connection for configuration/setup 2.3.1 BMS Port The Modbus 485 connection will use the terminals marked “Repeater.” (TB2) The Modbus server uses RTU protocol and will allow for a maximum of 32 units on 4000ft. of wire on a common line.
Installation Accessing the Configuration Port What you will need: • PC capable of running a terminal emulation application, such as Microsoft Windows® HyperTerminal®. • DB9 Null modem or file transfer cable. (The correct cable will have at a minimum, pins 2 and 3 crossed at the ends.) Null modem cables are commonly found in computers stores and may also be referred to as a file transfer cable.
Installation 5. After the communication settings are adjusted, press the Enter key on your keyboard. This will initiate communication with the card and Figure 3 should appear. Figure 3 NIC-485 main menu in HyperTerminal (You can also cycle power on the OpenComms NIC-485. This will also initiate communication and provide information on current revision status.) 6. When the message “Initializing Network…” appears, hit the Enter key on your keyboard.
System Configuration 3.0 SYSTEM CONFIGURATION 3.1 DIP Switch Settings A four-position DIP-switch is provided, but no user configuration via DIP switches is necessary at this time. Table 2 DIP Switch DIP switch default settings Default Setting S2.
System Configuration 3.2 Service Terminal Refer to Accessing the Configuration Port on page 5 for details on accessing the service terminal / configuration port. The default service terminal communication parameters are: • 9600 bps • No parity • 8 data bits • 1 stop bit • Flow Control: None After connecting to the OpenComms NIC-485, press the space bar or Enter key to activate the service terminal session.
System Configuration Change User Name / Password This section allows users to set or change the default user name and password. • Default user name is “Liebert” (case sensitive). • Default password is “Liebert” (case sensitive). Firmware Updates Menu The Firmware Update Menu is intended for Liebert service personnel only. No user configurable parameters are accessed in this selection. If entered, to escape, power must be cycled on the card.
Operation 4.0 OPERATION 4.1 Modbus RTU See 5.0 - Modbus Communication and Connectivity for information about the Modbus slave. 4.2 System Reset The OpenComms NIC-485 contains an on-board real time clock and watchdog circuitry. The card is self-monitoring and self-correcting. Nevertheless, a pushbutton is provided in the event that a manual system reset in desired. The Reset pushbutton is labeled S1 on the interface card: press and hold for 3 seconds before to releasing to initiate hardware reset.
Operation Figure 4 LED Locations DS8 DS9 DS8 DS13 11
Modbus Communication and Connectivity 5.0 MODBUS COMMUNICATION AND CONNECTIVITY This section describes the Modbus communication protocol as supported by the OpenComms NIC-485. It includes information on how to pass information to and from the OpenComms NIC-485 via Modbus. It is also intended to help facilitate answering questions regarding supported types, frame format, function code support etc. 5.
Modbus Communication and Connectivity Figure 5 Typical maximum installation Modbus RTU Master EIA-485 9600,N,8,1 Maximum of 32 devices with combined cable length of 4000 feet The recommended cable characteristics are: Normal Environments: • 18-22 gauge, twisted-pair, stranded (non- shielded) Typical type is: Belden 8442 Noisy Environments: • 18-22 gauge, twisted-pair, stranded (shielded) Typical type is: Belden 9461 13
Modbus Communication and Connectivity Figure 6 Exceeding maximum specifications Modbus RTU Master EIA-485 9600,N,8,1 Maximum of 32 devices with combined cable length of 4000 feet R Modbus RTU Master EIA-485 9600,N,8,1 R Maximum of 32 devices with combined cable length of 4000 feet The maximum specification may be exceeded if measures are taken to drive or boost the EIA-485 communication line. Two wire EIA485 repeaters are available through the Liebert Corporation.
Modbus Communication and Connectivity Function Code Support The OpenComms NIC-485 implements the following Modbus functions. However, integrators will use function code 0x03, and 0x06 most often due to the type of data to be acquired. 0x01 Read Coil Status 0x02 Read Input Status 0x03 Read Holding Registers 0x04 Read Input Registers 0x06 Write Single Holding Register 0x0F Force Multiple Coils 0x10 Preset Multiple Holding Registers 5.4.
Modbus Communication and Connectivity 5.4.5 Read Input Status (0x02) The input status block contains read-only status accessible to the users. It can be read by using function code 0x02 in the same as reading coil status. 5.4.6 Error Handling According to the Modbus specification, the OpenComms NIC-485 composes the following exception responses to the client if an exception or error occurs.
Modbus Communication and Connectivity Data Field(s) The data field varies in length depending on whether the message is a request or a response to a packet. This field typically contains information required by the slave device to perform the command specified or to pass back data to the master device. Error Check Field The Error Check Field consists of a 16-bit (2 byte) Cyclical Redundancy Check (CRC16). It allows the receiving device to detect a packet that has been corrupted with transmission errors.
NIC-485 Setup and Testing 6.0 NIC-485 SETUP AND TESTING The NIC-485 has a specific setup that must be in place before the card will function properly. There are jumpers on the board that must be in the correct locations. The positions of these jumpers are numbered on the board itself. A small triangle silk screened on the board represents pin 1 for each set of pins to which jumpers may be applied. 6.1 Jumper Placements J13, J14, and J18 on the board must have jumpers installed on them.
Firmware Updates 7.0 FIRMWARE UPDATES The firmware in the OpenComms NIC-485 can be updated to take advantage of the latest release of software that may contain feature enhancements, new unit compatibility or service patches. The firmware is updated through the OpenComms NIC-485’s serial port, using a terminal emulation program like HyperTerminal in MS Windows Operating Systems. This procedure has multiple steps and requires that three files be downloaded to the OpenComms NIC-485.
Firmware Updates 7.2 Establishing Communication—Service Terminal Settings 1. Launch HyperTerminal. Once you see the following screen, select Cancel. 2. Select the disconnect icon from the menu bar . This step ensures that you will be able to modify the configuration settings. 3. Go to File > Properties to make configuration changes. Under the Connect To setting, choose the appropriate communication port for your computer. Generally this is Com 1. 4.
Firmware Updates 7.3 ! Firmware Update Procedure CAUTION The firmware download process is timed. After the firmware download is initiated as described below, the user has approximately 1 minute to finish initialization. Before beginning the download, determine the location of the firmware files so that the download can be completed within the time constraints. 1. After the communication settings are adjusted, press the Enter key on your keyboard.
Firmware Updates 8. When the above prompt is displayed, start the file download process by selecting Transfer – Send File… from the HyperTerminal menu, as shown at right. 9. Select Xmodem for the Protocol and browse to locate the file OCNIC_REVx.x00.0_BLDxxx_FILE1.s19. 10. 15.) Click on Send in the dialog box. NOTE Do not press any keys on your keyboard or the firmware download will abort. 11. The screen at right will appear when the download begins.
Firmware Updates Once the last file is downloaded, the screen below right will appear. Repeat Steps 2 through 4 to change the baud rate back to 9600 bps as show in the illustration below right. After the communication settings are adjusted, hit the Enter key on your keyboard. The screen at right will appear. You can also cycle power on the OpenComms NIC-485. This action will also initiate communication and provide information on current revision status.
External Enclosures 8.0 EXTERNAL ENCLOSURES 8.1 Power Connection Power for the OpenComms NIC-485 should be sourced from the supplied wall-plug transformer. Use field-supplied wiring to connect the outer terminals on the transformer to the screw connectors at TB3 on the NIC-485. A field-supplied ground wire attaches to the center terminal on the transformer and connects to the grounding stud in the lower corner of the enclosure.
Retrofit Installation 9.0 RETROFIT INSTALLATION 9.1 Environmental Installation Retrofit kits are designed specifically for individual units. Consult your local Liebert representative for pricing, part numbers and installation help. 9.1.1 Deluxe System/3 Position the OpenComms card in the low voltage/control cavity of the Liebert Deluxe System 3 unit. Refer to Figures 8, 9 and 10 for typical positioning. Use three #8 x 1/2" sheet metal screws to affix mounting plate to the environmental unit.
Retrofit Installation Figure 9 Deluxe System 3 chilled water NIC-485 installation TB3 P43 P25 TB1 TB2 - Connects to screw terminals 77 and 78; (see schematic) Figure 10 ICS NIC-485 installation TB3 TB1 TB1 - Connects to screw terminals 77 and 78; (see schematic) P43 P25 26
Retrofit Installation Figure 11 Challenger NIC-485 installation location TB1 TB3 TB1 - Connects to screw terminals 77 and 78; (see schematic) P43 P25 Electric Panel The OpenComms NIC-485 mounts on the Challenger’s L-plate.
Retrofit Installation 9.2 System Wiring—SM, AM, AG Microprocessors Two wiring harnesses are included with the retrofit kit, one for the power connection and the second for communication. They are of sufficient length for use with the Deluxe System/3 and ICS units and the microprocessors listed above. For the Challenger product series, use the longer wiring harnesses included with the NIC485-K-Chall kit. NOTE Board illustrations are shown only for location of connections.
Retrofit Installation 9.3.2 Communication Connection—SM, AM, AG Microprocessor The second wiring harness provided (p/n 159083G1) has a connector fitted at either end and is the communication connection between the unit microprocessor and the NIC-485. To put it in the system: 1. Remove the existing wire located on P25 of the environmental controller, cut off the red connector and reconnect the wires to TB2 of the interface card. Ensure correct polarity. 2.
Retrofit Installation 9.4 Himod—LNA Position the OpenComms card in the low voltage/control cavity of the Liebert Himod unit. Refer to the drawing below for typical positioning. Use three #8 x ½” sheet metal screws to affix mounting plate to the Environmental unit.
Retrofit Installation 9.4.2 Power Connection for Himod The harness supplied with the OpenComms NIC-485 (p/n 159084G1) is equipped with three connectors, one at either end of the harness and one in the middle. The harness taps power from the 24 VAC input to the control board of the environmental unit. To connect this power to the NIC-485: 1. Locate the connector containing the two red wires plugged into P43 on the control board and unplug it.
Retrofit Installation 9.8 Npower As a minimum there will be an IFM board (communication interface) mounted at the mid-point on the door. Other options may also have been previously installed. The option boards mount on the inside of the option door. The OpenComms NIC-485 should be mounted in the bottommost (bottom cable entry) position. Other options can be placed in any open option slot. 9.8.
Retrofit Installation Figure 13 NPower UPS NIC-485 installation Power Supply Board Option Section SiteScan IFM Control Door OpenComms NIC-485 location (see detail) IGMnet 24VAC Detail 33
Retrofit Installation 9.9 7200 UPS Retrofit Kits are designed specifically for individual units. Consult your local sales / service representative for pricing, part numbers and installation help. ! CAUTION Before installing the kit P/N 4645114G for Network Interface Card (P/N 4590063X), in the 7200 Series UPS, it is necessary to power down that unit.
Retrofit Installation Figure 14 7200 UPS NIC-485 installation Logic Operator Board Network Interface Card Ethernet Connection 35
Retrofit Installation 9.10 HiPulse UPS Retrofit Kits are designed specifically for individual units. Consult your local sales / service representative for pricing, part numbers and installation help. ! CAUTION Before installing the kit P/N 4645114D for NIC-485 (P/N 4590063X), in the HiPulse UPS, it is necessary to power down that unit. To maintain continuity of supply, the load should first be transferred to the maintenance bypass circuit following the procedure given in the UPS user manual.
Retrofit Installation Figure 15 HiPulse NIC-485 installation 37
Retrofit Installation 9.11 Static Switch2 Retrofit kits are designed specifically for individual units. Consult your local sales / service representative for pricing, part numbers and installation help. Figure 16 STS2 typical NIC-485 connections RS-232 (DB-9 connector) for setup only.
Retrofit Installation Figure 18 STS2 NIC-485 installation, 100 - 600A units See Option Location Detail REMOTE SOURCE SELECT (OPTION) PROGRAMMABLE RELAY BOARD (OPTION) PROGRAMMABLE RELAY BOARD (OPTION) INPUT CONTACT ISOLATOR BOARD (OPTION) CONTROL WIRING Front View With Front Door Removed 9.12 Option Location Detail NETWORK INTERFACE CARD (NIC) (OPTION) COMMS BOARD FOR SITESCAN, EXTERNAL AND INTERNAL MODEM INTERFACE (OPTION) STS Retrofit kits are designed specifically for individual units.
Retrofit Installation 40
MONITORING OpenComms NIC-485 USER MANUAL The Company Behind the Products With over a million installations around the globe, Liebert is the world leader in computer protection systems.
