Allen-Bradley 440R-S12R2 Safety Relay

Allen‑Bradley 440R‑S12R2 Guardmaster single‑input safety relay is a DIN‑rail mounted safety controller in the Guardmaster family that monitors a dual‑channel safety input and provides two safety‑contact outputs to drive guarding devices in a machine. It runs from a 24 V DC control supply and offers 2 input terminals and 2 safety output contacts, suitable for integration with protective interlocks, safety mats, and other safety devices in industrial panels. The device carries UL safety ratings with continuous output current limits: AC‑15 up to 1.5 A at 250 V AC and DC‑13 up to 2 A at 24 V DC (UL C300). Its DIN‑rail compatible design supports installation in standard control panels where a single relay can monitor and switch two safety paths. The 440R‑S12R2 is intended to help ensure fail‑safe shutdown of machinery when a safety device is actuated, reducing risk in manufacturing environments.