Allen-Bradley 440R-N23135 MSR127RP Safety Relay

The Allen-Bradley Guardmaster 440R-N23135 MSR127RP Safety Relay is a single-channel safety relay designed to monitor basic guarding devices and manage safe shutdown sequences in machinery. It accepts a 24 V AC or DC supply, uses manual-monitored reset, and mounts in a compact 22.5 mm panel footprint with removable construction for easy serviceability. As part of the Guardmaster MSR127RP family, this module provides one monitored safety channel suitable for interfacing safety interlocks, emergency stops, and guarded access points in light- to medium-duty applications, delivering a defined safe state when a fault is detected or a safeguard is opened. The device is widely stocked by Rockwell Automation distributors and compatible retailers, making it a common pick for upgrading legacy safety circuits or implementing straightforward safeguarded lines on manufacturing and packaging lines. This safety relay is built for industrial environments and emphasizes reliable operation in safety circuits with straightforward wiring to meet basic safety requirements.