Allen-Bradley 440R-N23132 Safety Relay Module

Allen-Bradley 440R-N23132 Safety Relay Module, part of Rockwell Automation’s Guardmaster MSR127TP family, is a compact safety monitoring relay designed to supervise safety circuits on automated equipment. It accepts a 24 VAC or 24 VDC supply and provides three normally open safety outputs plus one auxiliary normally closed contact for status signaling, enabling direct control of safety devices or safety-rated circuits without an external relay. The MSR127TP supports automatic reset operation, helping restore a safe condition automatically when verified, and the unit is 22.5 mm wide with removable terminal blocks for convenient wiring in DIN-rail panels. Typical installations include emergency-stop devices, safety interlocks, light curtains, and other safety devices integrated into conveyors, presses, and robotic cells, delivering reliable monitoring and failsafe signaling in safety-rated control loops.