LM21XPBB – Extended Performance Release Device

The LM21XPBB standalone fire door release device ensures fail-safe operation even during power outages. It includes UL864 Revision 9 compliance, battery backup, and integrated fire alarm functionality for reliable door release when needed.

Key Specifications

Compliance: UL864 Revision 9
Battery Backup: Supports operation during power loss
Programmable Delay: DIP switch selectable 10, 20, 30, or 60 second release delay
Detector Inputs: Supports 2- or 4-wire normally open and 4-wire normally closed detectors
Relays: Trouble and alarm relays for fire panel integration
Trouble Sounder: Audible alert when the device is not operational
Diagnostics: On-board LEDs for easy troubleshooting
Test Function: Routine testing without smoke detector activation
Voice Evacuation (Optional): LM21XPBBVB model includes pre-recorded voice evacuation message board

Features

UL864 Revision 9 compliant
Programmable DIP switch delay setting – either 10, 20, 30, or 60 seconds delay of door release to permit passage clearance
Inputs for normally open 2- or 4-wire detectors and 4-wire normally closed detectors
Trouble and alarm relays for communication with the fire alarm control panel, if required
Audible trouble sounder to indicate when the release device is not operational
On board diagnostic LEDs for easy troubleshooting
Testing function allows routine fire door testing without requiring activation of the smoke detector
Model LM21XPBBVB is equipped with a voice board to broadcast a pre-recorded voice evacuation message