LiftMaster LM21XP Fire Door Release with Alarm Delay lm-hdsw24 and their UL variants

and their UL variants

0 system to maintain optimal operation and compliance

ensuring smooth operation for demanding applications

this part ensures long-term reliability in demanding vehicle access control systems

LiftMaster LM21XP Fire Door Release with Alarm Delay lm-hdsw24 and their UL variantsProgrammable Fire Door Release for Rolling and Sliding Systems The LiftMaster LM21XP is a UL listed fire rated door release device designed for use with rolling steel, sliding, and center parting doors. Engineered to respond to fire alarms or fusible link activation, it enables controlled release of fire doors in emergencies while supporting compliance with NFPA 72 and 80. The unit features a normally energized fail safe design, programmable delay on