Allen-Bradley 440R-N23125 Guardmaster MSR127T Safety Relay
The Allen-Bradley 440R-N23125 is a high-reliability Guardmaster MSR127T Single-Function Safety Relay engineered by Rockwell Automation. Designed for single-zone safety applications, this compact module provides essential monitoring for safety circuits including emergency stop (E-stop) push buttons, safety gates, and light curtains. Operating on a robust 115V AC power supply, it functions perfectly in industrial environments requiring high performance and strict compliance. This model features a configurable design that allows operators to choose between automatic/manual reset or a monitored manual reset, offering the versatility needed to match specific machinery safety profiles. Packaged in a space-saving 22.5 mm DIN rail housing, it delivers maximum safety logic control while minimizing control panel footprint.
| Specifications | |
| Product Make | ALLEN-BRADLEY |
| Part Number / MPN | Â 440R-N23125 |
| Product Family | Â Guardmaster MSR127T |
| Type | Single-Function Safety Relay |
| Supply Voltage | 115V AC (50/60 Hz) |
| Power Consumption | 4 VA |
| Safety Outputs | 3 N.O. (Normally Open) Immediate |
| Auxiliary Outputs | Â 1 N.C. (Normally Closed) Immediate |
| Thermal Contact Rating | 3 Amps |
| Utilization Category | AC-15: 3 A @ 230V AC / DC-13: 6 A @ 24V DC |
| Condition | NEW |
| Warranty | 1 YEAR |
| Country of Origin | Germany |
| Protection Degree | IP40 (Housing), IP20 (Terminals) |
| Length | 114.5 mm |
| Width | 22.5 mm |
| Height | 99 mm |
| Weight | 260 g |









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