McQuay IM 743

6 IM 743-1
Component Data
Figure 2 shows the location of the major components of the Modbus Communication Module.
Figure 2. Modbus Communication Module Major Components
RS-485 Network Connetor
8-Pin Header
Modbus Connector
RS-485 Network Connector
This connector connects the Modbus Communication Module to the RS-485 network.
Pin Function
1 Reference
2 Inverting Input
3 Non-inverting Input
8-Pin Header
The 8-pin header connects the MicroTech II Chiller Unit Controller to the Modbus Communication
Module.