ABB 1SVR730712R1400 Industrial Safety Relay Module

ABB 1SVR730712R1400 is the CM-MSS.31S thermistor motor protection relay that uses external thermistors to monitor motor winding temperature and provides a single normally open plus a normally closed contact to trip the circuit if the temperature limit is exceeded, helping prevent motor damage from overheating. The screw-terminal variant (S) accepts a universal 24–240 V AC/DC supply and is engineered for robust field wiring in industrial environments, with a 1NO+1NC configuration that supports straightforward integration into motor control circuits. Common applications include protection for industrial motors in conveyors, pumps, fans, and other automation equipment, where winding temperature monitoring enables early fault detection and safe shutdown, while ABB's CM-MSS family provides standardized, compatible protection relays. The 1SVR730712R1400 designation corresponds to the CM-MSS.31S model with screw terminals, and is documented in ABB catalogs and distributor listings as a thermistor relay for motor protection, reinforcing its role as a dedicated temperature-based protective device in control panels.