Schneider Electric S48377 48845 Modbus Module

The Schneider Electric S48377 / 48845 CCM Modbus Module is a Cradle Communication Module (CCM) that provides Modbus connectivity for Masterpact circuit breakers in a four‑wire Modbus network. Designed for use with Masterpact NW drawout breakers, this 24 VDC powered module draws about 1 W and plugs into the breaker cradle to enable Modbus communications between the breaker and a Modbus master, supporting remote monitoring and control within industrial automation or power distribution setups. Typical applications include integrating large protection schemes with SCADA or EMS systems, where Modbus provides supervisory access to breaker status, metering data, and basic command functionality in four-wire networks. The S48377 (also listed as 48845) is recognized in Schneider Electric and third‑party listings as the Modbus cradle module for Square D/Masterpact interfaces, ensuring compatibility with Square D Masterpact NW/MCCB assemblies in retrofit or new installations.