Allen-Bradley 440G-LZS21UPLH Guard Locking Switch

Allen-Bradley 440G-LZS21UPLH Guard Locking Switch is a power-to-lock RFID‑enabled interlock from Rockwell Automation’s Guardmaster 440G‑LZ family, designed to secure guard doors on industrial equipment. It operates from a 24 V DC solenoid, with no solenoid contacts, and provides signaling through two safety/auxiliary PNPN outputs (0.2 A max) plus a third PNPN output for lock status; the actuator is RFID-coded (Unique) for reliable door verification. The unit mounts with a 6-inch (150 mm) conduit entry and ships with a 6-inch pigtail and M12 8-pin quick-disconnect plug, enabling straightforward wiring. It delivers a holding force of 1300 N (approximately 292 lbf), making it suitable for guarding applications where the door must resist being forced open while energized. Typical uses include partial-body guarding on presses, conveyors, and automated lines, where RFID verification of the door position helps ensure that safety interlocks operate correctly before the machine can restart.