An auxiliary contact block provides one changeover contact with one common point for OF and SD function, Degree of Protection: IP54, depending on where it is inserted, Open/Close OF Function: indicates position of the circuit breaker contacts Trip Alarm SD Function: indicates circuit breaker tripping due to: Electrical fault (overload, short circuit), Shunt trip/Undervoltage release, “Push to Trip” Function, Resets when the circuit breaker is reset.