Allen-Bradley 440H-S34028 Safety Interlock Switch

The Allen-Bradley 440H-S34028 (440H-S34028) is an industrial safety interlock switch engineered for machinery safeguarding and access monitoring applications. Serving as an essential component within plant safety control architectures, this heavy-duty interlock unit helps enforce safe operating sequences by ensuring that protective barriers, guard doors, and access gates remain secured while hazardous equipment is operational. It prevents unauthorized or premature entry into guarded machinery zones and can isolate machine control circuits to bring equipment to a safe state before personnel enter dangerous areas. Constructed for demanding industrial environments, the unit offers robust mechanical durability and consistent performance in automated production facilities, manufacturing cells, and material handling systems. The physical assembly has a net weight of 10 kg, reflecting its solid design and heavy-duty industrial build. The 440H-S34028 safety interlock switch integrates with industrial automation safety circuits, emergency stop networks, and safety control systems to protect operators and machinery from accidental restart, mechanical hazards, and unsafe operating conditions.