LM21XP – High Performance Release Device – Fail-Safe
The LM21XP fire door release device provides a UL864 Revision 9 compliant, fail-safe mechanism to release fire doors or shutters in coordination with a fire alarm panel. It features programmable delay settings, door position monitoring, and on-board diagnostics for reliable operation and easy maintenance.
Key Specifications
Compliance: UL864 Revision 9
Programmable Delay: DIP switch selectable 10, 20, 30, or 60 second release delay
Door Position Detection: Prevents release if the door remains closed, reducing service calls
Diagnostics: On-board LEDs for early troubleshooting
Test Function: Routine testing without central alarm activation and easy reset to standby
Programmable DIP switch delay setting – either 10, 20, 30, or 60 seconds delay of door release to permit passageway clearance
Close door detection – prevents door release if the door is kept in the closed position and eliminates door reset service calls or potential system damage
On board diagnostic LEDs for early troubleshooting
Testing function allows routine fire door testing without requiring activation of the central alarm system; easy reset function returns the device to a standby state
