Description
LiftMaster Extended Performance Release Device with Battery Backup | LIF-LM21XPBB
LiftMaster Extended Performance Release Device with Battery Backup | LIF-LM21XPBB
The LiftMaster LM21XPBB Release Device is a UL/ULC listed normally energized fail-safe device designed for use on rolling doors, single-slide, center-parting level, and inclined track doors. This device is a normally energized fail-safe releasing device incorporating state-of-the-art electronic control circuitry.
The release device responds to emergency conditions generated from an automatic initiating device and is used in conjunction with a fusible link system. The release device can be powered from 120Vac, 24 Vac, or 24Vdc.
The 24Vdc cannot be sourced from a fire alarm control panel or UL1481 regulated power supply. The devices can be activated via a smoke detector or an alarm relay from the panel’s Form C dry contact relay.
Features
- UL 864 Revision 9 compliant.
- Selectable 10, 20, 30, or 60-second delay on alarm.
- Closed-door detection capabilities.
- Form C relay outputs for the transmission of alarm and trouble signals transmitted to the fire alarm control panel.
- The testing function allows routine fire door testing without requiring activation of the smoke detector.
- Audible trouble sounder to indicate when the release device is not operational.
- Diagnostic feedback LEDs.
- Battery backup for the release device and accessories.
- A battery management system that can provide 24Vdc power for up to four smoke detectors and two horn strobes.
Product Literature
- LiftMaster Extended Performance Release Device LM21XPBB Owner’s Manual
