The Allen-Bradley GuardMaster 440R-N23129 MSR127R Safety Relay monitors two safety input channels and coordinates Guardmaster safety circuitry to ensure a safe-state output. It provides a 3 normally open, 1 normally closed contact configuration with fixed screw terminals and a monitored manual reset, all packaged in a compact module. Commonly used with safety interlocks, guard doors, and safety mats, this 24 V DC safety relay supports two-channel safety architectures in industrial guarding applications.
