Allen-Bradley 440R-M23143 is the Guardmaster Minotaur MSR138DP safety relay module, a compact, single-function safety relay designed to monitor safety inputs and safely control machinery in industrial environments. It operates on 24 V AC or DC, and offers automatic/manual monitored operation with removable terminal blocks and a 45 mm-wide enclosure. The MSR138DP provides two safety contacts and a programmable time delay from 0.15 to 3 seconds, enabling safe start/stop sequencing in guarding interlocks and sensor circuits. Used in safety circuits to monitor guarding devices and ensure controlled machine restart.
