Allen-Bradley 440R-D23163 Two Hand Control Safety Relay

Allen-Bradley 440R-D23163 Guardmaster MSR125H Two-Hand Control Safety Relay is a dedicated safety-monitoring device designed to enforce two-handed operation on hazardous machinery. It provides two normally open immediate safety outputs and is powered from 230 V AC, enabling straightforward integration with common control circuits. The unit features automatic or manual reset and fixed terminals for reliable field wiring, all packaged in a compact 22.5 mm-wide enclosure suited to standard safety-relay installations. As part of the MSR125H family, this relay interfaces with two-hand control devices to ensure both hands are engaged before a hazardous action can start, helping meet guarding requirements for equipment like presses, shears, and conveyors. When either hand input is released or a safety condition is detected, the two safety outputs de-energize to stop the hazard, delivering a rapid safety shutoff in accordance with typical industrial safety-relay configurations.