Allen-Bradley 440G-TZS21UPRH Guard Locking Switch

Allen-Bradley 440G-TZS21UPRH is a Guardmaster TLS-Z GD2 guard-locking switch that provides power-to-release interlock protection for machine access doors and includes a lock-status feedback signal for safe-machine control. It operates on 24V AC/DC, with an 8-pin Micro (M12) conduit entry and a Fully-Flex actuator designed to accommodate a variety of door configurations. The interlock offers safety and auxiliary contacts: two PNP outputs (0.2 A max) plus one additional PNP output (0.2 A max), plus a lock-status indication to verify when the door is secured, making it compatible with standard safety relays and PLCs in applications such as presses, shears, and automated lines. The 440G-TZS21UPRH variant specifically uses the TLS-Z (Power to Release) scheme, suitable for machinery that requires release of the door lock when the safety controller allows it.