Allen-Bradley 440R-E23191 GuardMaster Safety Relay

Allen-Bradley Guardmaster 440R-E23191 is a 24 V AC/DC safety-relay module (MSR132E) that monitors safety devices in Guardmaster safety circuits and provides fail-safe outputs to control machinery. It features four normally open safety outputs and two normally closed auxiliary outputs, enabling wiring for common safety configurations such as emergency-stop networks, guard interlocks, and two-hand control setups. Powered from a 24 V supply, the MSR132E-based 440R-E23191 is built for reliability in safety-critical applications where prompt, verifiable shutdown of equipment is required. As part of the Guardmaster family, it helps ensure safe machine operation and worker separation in industrial environments.