Allen-Bradley 440R-D22R2 Dual-Channel Input Safety Mat Relay

The Allen-Bradley 440R-D22R2 Guardmaster Dual Input Safety Relay (DI) is a 24 VDC safety relay that sits in a control panel to monitor two dual‑channel safety inputs and to drive two immediate normally‑open safety outputs, plus one solid‑state auxiliary output for status signaling. It accepts two dual‑channel universal inputs and a single‑wire safety (SWS) input, enabling use with a wide range of safety devices such as E-stops, interlocks, safety mats, and optical or magnetic sensors, with internal logic that can be configured for AND or OR between the inputs. The unit draws about 2.5 W and uses screw terminals for wiring, with removable terminals for easy field maintenance, and mounts on a standard DIN rail. Output capability includes two normally open safety outputs and one normally closed solid‑state auxiliary output, with a continuous safety output current rating up to 2 A at 24 VDC (or 1.5 A at 250 VAC) and a surge auxiliary output of 700 mA, for a total module output capacity of up to 6 A. Reset behavior is configurable (automatic, manual, or manual‑monitored) to suit different safety architectures, and the device is designed to monitor mats and other safety devices in compliance with safety standards. The 440R‑D22R2 is part of the Guardmaster GSR family and, on typical installations, features IP40 protection with a temperature operating range roughly from −5 °C to 55 °C.