Allen-Bradley Guardmaster 440R-C23139 MSR131RTP is a CAT 4-rated single-function safety relay used to monitor safety devices and generate safe outputs in industrial control systems. It operates from 24 V AC/DC and features removable spring-clamp terminals for quick field wiring, all housed in a 45 mm-wide Guardmaster enclosure. Configurable reset options include Automatic/Manual or Manual Monitored Reset, and the unit provides safety outputs (OSSD) when connected to compatible safety sensors.
