LiftMaster Ext. Relay Device with BBU for Door Opener Systems - LM21XPBB
Details
LiftMaster Ext. Relay Device with BBU for Door Opener Systems - LM21XPBB
This external relay device provides fire door control with integrated battery backup. Keeps emergency operations active even during power failure. Compatible with LiftMaster commercial Openers. Essential for safety-critical access systems.
| SKU | LM21XPBB |
|---|---|
| Opener Type Compatibility | Parts for Door Opener Systems |