Allen-Bradley 440G-EZS21STL05J Guard Locking Switch

Allen-Bradley 440G-EZS21STL05J Guard Locking Switch is a 440G interlocking safety device with a power-to-lock design and a magnetic actuator that secures machine guards in hazardous environments. It delivers 500 N of locking force and provides two PNP safety/auxiliary contacts (0.2 A max) for door-position signaling, with door-position information available from both the safety and auxiliary circuits. Wiring uses a 6-inch conduit entry via a pigtail with an M12 5-pin quick-disconnect connector, and the device lists solenoid voltage as N/A, reflecting its magnet-based locking operation and a magnetic retaining force of about 25 N when unpowered. This guard-locking switch is designed to integrate with Rockwell Automation safety controllers and the Guardmaster/Guardlink ecosystem to monitor guarded doors, making it suitable for safeguarding access to hazardous machinery in manufacturing and processing lines, while supporting OSSD-type outputs on its safety channel. The 440G-EZS21STL05J is part of the 440G family of electromagnetic safety switches, offering non-contact actuation and robust guarding for demanding industrial environments.