Product Line
Powerpact P, Masterpact NT, Masterpact NW, Compact NS
Environment
Installing or troubleshooting breaker communications
Resolution
The figure above displays the communication components of a fix mount insulated case breaker. Schneider Electric circuit breakers that come in this configuration are the Powerpact P frame, Masterpact NT and NW, and Compact NS. Below are descriptions of the components labeled C and D.
Fixed Terminal Block (C)
The terminal block is design to be inserted into particular slot at the top of the breaker. The slot is marked with terminal E1-E6. The terminal assignments are as follows:
Breaker Communication Module or BCM (D)
The BCM is installed a behind the trip unit and communicates with trip unit through an infrared port. There is a connector at the top of the unit to bring in the power and communication from the terminal block.
Powerpact P, Masterpact NT, Masterpact NW, Compact NS
Environment
Installing or troubleshooting breaker communications
Resolution
The figure above displays the communication components of a fix mount insulated case breaker. Schneider Electric circuit breakers that come in this configuration are the Powerpact P frame, Masterpact NT and NW, and Compact NS. Below are descriptions of the components labeled C and D.
Fixed Terminal Block (C)
The terminal block is design to be inserted into particular slot at the top of the breaker. The slot is marked with terminal E1-E6. The terminal assignments are as follows:
- E1(+), E2(-) : The terminal supplies 24 VDC to the BCM. (It does not supply the trip unit or its display)
- E3(-), E4(+): These are the transmit (Tx) terminals for 4 wire RS-485 communication.
- E5(-), E6(+): These are the receive (Rx) terminals for 4 wire RS-485 communication.
Breaker Communication Module or BCM (D)
The BCM is installed a behind the trip unit and communicates with trip unit through an infrared port. There is a connector at the top of the unit to bring in the power and communication from the terminal block.