3
Configuration
Communication Terminal Strip Wiring Pinouts
MODBUSCARD Communication Terminal Pinout
RS-232
RS-485
GND
Rx
Tx
GND
T-
T+
8
7
6
5
4
3
2
1
GND
R-
R+
T-
T+
RS-422
For RS-232 connection, use terminals 6 (Tx), 7 (Rx), 8 (G).
For RS-485, use terminals 1 (T+), 2 (T-), 5 (G) for half-duplex communication.
For RS-422, use terminals 1 (T+), 2 (T-), 3 (R+), 4 (R-), 5 (G) for full-duplex communication.
Note:
The communication methods chosen must have its configuration dip switches set prior to installing the MODBUSCARD into the UPS
systems accessory slot.
Device ID Configuration
Every MODBUS device needs to be set to a specific ID in order to be recognized by the system monitoring its MODBUS
communication. Each switch of SW1 has a specific value assigned to it. The MODBUSCARD supports device IDs from 0-255,
starting from the Least Significant Bit (LSB) to the Most Significant Bit (MSB). See Device ID Switch Values (Figure A).
Figure A: Device ID Switch Values (SW1)
