The Schneider Electric Square D S48377 Modbus Cradle Communication Module (CCM) is a cradle‑style Modbus interface that plugs into Masterpact MCCBs to provide Modbus network connectivity. It is a 24 VDC powered device and typically consumes about 1 W. The S48377 acts as the Modbus communications module for Masterpact breakers, enabling integration with Modbus‑enabled control systems. It is commonly used in retrofit or expansion projects to connect Square D Masterpact MCCBs to SCADA or PLC systems via Modbus.
