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Home Chamberlain, LiftMaster Commercial Door & Gate Operator Accessories Access Controls Fusible Links & Fire Release Devices
LM21XPBB

LiftMaster Extended Performance Fire Door Release Device with Battery Backup

  • 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
    • .......more details
Installation Manual
AFB120

LiftMaster Fire Access Box w/Micro Switch & Knox Key Switch Option

  • ll-in-one fire access box
  • Includes: access door with a hole for a standard or fire department padlock interior micro switch knock out for Knox key switch and standard cylinder lock
  • Two options for automatic gate access: 1) micro switch is activated when the padlock is removed and the front panel is opened or 2) via Knox key switch
  • NOTE: fire department padlock and Knox switch NOT provided
LM21AFCB

LiftMaster Advance Fire Control Release Device

  • UL 864 Revision 9 compliant.
  • 3 count obstruction cycling.
  • Selectable 10 20 30 or 60-second time delay on alarm.
  • Test key switch – Floor level testing.
  • Motor voltage sensing.
  • Form C relay output.
    • .......more details
LM21XPBBVB

LiftMaster Extended Performance Fire Door Release Device with Battery Backup and Voice Board ** No Longer Available

  • 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
    • .......more details
Installation manual
LM21XP

LiftMaster Extended Performance Fire Door Release Device

  • 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
    • .......more details
Installation manual