Allen-Bradley MSR126T-440R-N23117 Safety Relay

The Allen-Bradley Guardmaster MSR126T Safety Relay (model variant 440R-N23117) is a dual‑channel safety relay designed to monitor safety devices such as emergency stops and interlocks and to provide verifiable safe outputs to control machinery. The 24AC/DC version operates from 24 V AC or 24 V DC and comes in a compact 22.5 mm wide module with fixed screw terminals for straightforward wiring. The unit delivers safety signaling via two OSSD outputs and includes one normally closed contact used within the monitored circuit; it supports automatic or manual reset to ensure deliberate restart after a fault. This MSR126T module can function as a standalone safety control or as part of a broader Guardmaster safety system, commonly applied in manufacturing where safety circuits must be verified before restarting equipment. Key specifications include 24 VAC/DC input (24AC/DC), two OSSD safety outputs, fixed terminals, and a compact 22.5 mm form factor, making it suitable for integration with devices such as door interlocks, light curtains, and two‑hand control stations in applications like presses, conveyors, and packaging lines.