Allen-Bradley 440N-G02123 Non-Contact Sensaguard Safety Switch

The Allen-Bradley 440N-G02123 is a stainless-steel, non-contact safety interlock switch from the Guardmaster 440N/SensaGuard family, designed to guard access doors on industrial equipment. It operates on 24 V DC and provides two normally closed safety contacts for dual-channel safety circuits, with a 3 m cable ready for easy integration into control systems. The device is described in Rockwell’s safety lineup as a non-contact interlock that is magnetically actuated within the Ferrogard 21 GD2 lineage, and it is part of the SensaGuard line that uses RFID coding and inductive sensing to detect door position without mechanical wear. With a rugged, corrosion-resistant housing, the 440N-G02123 is well-suited for harsh industrial environments such as packaging lines, conveyors, and robotics cells where a safe door interlock is essential to stop machinery when a guard is opened. The dual NC contacts feed safety signals into a qualified safety relay or controller, enabling compliant two-channel safety architecture while maintaining a compact footprint. This model’s combination of non-contact sensing, stainless steel construction, and dual NC outputs makes it a straightforward choice for retrofits and new installations seeking reliable, low-wear door protection.