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LiftMaster LM21AFCB Advanced Fire Control Release Device The LiftMaster Fire Control LM21AFCB Release Device is a UL ULC listed normally energized fail-safe device incorporating state-of-the-art electronic control circuitry. This release device is designed to be used with manual doors or motorized doors incorporating a reversing electric safety edge to create an automated door closing system…
LiftMaster LM21XP Extended Performance Release Device The LiftMaster LM21XP 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…
LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup 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…
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