Communication Function

Modbus Communication Option

The Modbus communication option enables a ComPacT NS circuit breaker to be connected to a supervisor or to any other device with a master Modbus communication channel.

The Modbus communication option consists of the BCM ULP circuit breaker communication module, installed behind the MicroLogic trip unit.

With the communication option, the ComPacT NS circuit breaker can be connected to the following networks:

• An RS-485 serial line network with Modbus protocol via an IFM Modbus-SL interface for one circuit breaker

• An Ethernet network with Modbus TCP/IP protocol via an IFE Ethernet interface for one circuit breaker or an IFE Ethernet switchboard server

For more information, refer to DOCA0220EN ComPacT NS - Modbus Communication Guide.

Communication Architecture

1. FDM121 front display module for one circuit breaker

2. IO input/output application

3. FDM128 Ethernet display for eight devices

4. IFE interface

5. ComPacT NS circuit breaker

6. MicroLogic trip unit

7. BCM ULP circuit breaker communication module (installed in ComPacT NS circuit breaker)

8. Go2SE landing page