Eaton Logo

Communication Adapter Modules (CAM)

The Communication Adapter Modules (CAM) are accessories that operate as a communicating device in conjunction with a compatible Series NRX trip unit/breaker in a master communications network.

  • The ICAM is used for INCOM communications with both Digitrip and PXR trip units
    • Can be daisy chained with Magnum 520MC or 1150 trip units and connected to the INCOM input on a PXG for Ethernet output
  • The MCAM is used for Modbus communications with both Digitrip and PXR trip units
    • Can be daisy chained and connected to the Modbus input on a PX Gateway for Ethernet output
  • The ECAM is used for Ethernet communications with both Digitrip and PXR trip units
  • The PCAM is used for Profibus communications with both Digitrip and PXR trip units
  • PXR-ECAM-MTCP provides Ethernet with Modbus TCP/IP communications for the PXR trip units
    • This is din rail mounted remotely, then hardwired using shielded twisted pair cable to the breaker
    • Can be used with the PXR20 and PXR25 trip units
    • Trip unit does NOT need to have Modbus communications

These modules, for the drawout type breaker with digitrip, will snap onto the DIN rail of the cassette. They are designed to install or replace the 4 contact blocks (8 contacts in total) at secondary contacts 19 through 26.

The wiring harness is style number 5723B54G10 if the CAM is mounted remotely. If the breaker has a PXR trip unit, the wiring harness is required.

Power requirements: 6 watts at 24 Vdc. Each CAM module will provide the isolation required for the 24 Vdc power supply source to the trip unit and the communications interface.

The CAM allows for remotely opening and closing the breaker over communications. The communication control jumper must be in the enable position for communications opening or closing. Refer to the wiring diagrams for NRX with digitrip and NRX with PXR.