Siemens S09JLD62A U 48 Industrial Safety Relay Module

Siemens S09JLD62A U 48 is a shunt-trip accessory with an auxiliary contact designed for use with Siemens JD/LD/LMD molded-case circuit breakers, providing 48 V DC control voltage. The unit installs on the breaker to allow remote disconnection of the circuit when a safety signal is received, delivering a rapid trip to shut down equipment in fault or hazardous conditions. In addition to the shunt-trip function, it includes a single auxiliary switch that provides feedback to control systems about the breaker’s status, enabling safe interlocks and sequence logic in industrial automation. Typical applications include machine safety circuits, emergency-stop architectures, and redundant protection schemes in panel boards, where 48 V DC control signals trigger the trip and the auxiliary contact reports position to PLCs or safety controllers.