Allen-Bradley 440G-T27171 Safety Interlock Device

Allen-Bradley 440G-T27171 is a Guardmaster TLS-GD2 guard-locking safety interlock switch designed for power-to-release door guarding. The 24 V AC/DC solenoid provides one normally closed and one normally open contact for the solenoid circuit, plus two normally closed and one normally open contacts for safety and auxiliary circuits. It features a Fully Flexible actuator and a 1/2 in NPT conduit entry for straightforward integration into common electrical enclosures. This interlock is used to secure machine guarding and prevent equipment start-up when a guarded door is open, delivering a verifiable safety interlock solution for industrial automation applications.