{"product_id":"liftmaster-ext-perf-rel-device-w-bbu","title":"LM21XPBB Extended Performance Release Device with Battery Backup","description":"\u003cp class=\"richp\"\u003eVersatility allows the XPBB release device to operate on 120VAC, 24VAC, or 24VDC\r power sources. Internal Battery Backup allows the release device to stand-alone from the fire alarm system and act independently in the event of a power outage. The system can provide 24VDC power for up to 4 smoke detectors and 2 horn strobes mounted on either side of the door. Programmable delay settings, close door detection, diagnostic LEDs, localized testing and reset capabilities are all also standard. \u003c\/p\u003e\u003cp class=\"richp\"\u003eFeatures include:\r\u003c\/p\u003e\u003cp class=\"richp\"\u003e• UL864\/ULC-S527\/S533 Listed\r\u003c\/p\u003e\u003cp class=\"richp\"\u003e• Programmable DIP switch delay setting –\r either 10, 20, 30, 60 second delay of door release to permit passage clearance \u003c\/p\u003e\u003cp class=\"richp\"\u003ePlus:\r\u003c\/p\u003e\u003cp class=\"richp\"\u003e• On board diagnostic LEDs for easy\r trouble shooting \u003c\/p\u003e\u003cp class=\"richp\"\u003e• Inputs for normally open 2- or\r 4-wire detectors and 4-wire normally closed detectors \u003c\/p\u003e\u003cp class=\"richp\"\u003e• Trouble and alarm relays for\r communication with the fire alarm control panel, if required \u003c\/p\u003e\u003cp class=\"richp\"\u003e• Audible trouble sounder to indicate when\r the release device is not operational \u003c\/p\u003e\u003cp class=\"richp\"\u003e• Testing function allows routine\r fire door testing without requiring activation of the smoke detector \u003c\/p\u003e\u003cp class=\"richp\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"CHAMBERLAIN","offers":[{"title":"Default Title","offer_id":46371990601866,"sku":"LM21XPBB","price":956.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/7978\/5354\/files\/LM21XPBB_225e84a1-0a32-4877-bdb6-6f8aa77d34b5.png?v=1749205979","url":"https:\/\/www.rsoperators.com\/products\/liftmaster-ext-perf-rel-device-w-bbu","provider":"R\u0026S Automation, Inc.","version":"1.0","type":"link"}