LiftMaster® Fire Door Release Device Accessories include smoke detectors, heat detectors, speaker/strobes, and notification devices. They are designed to give individuals in or around the door opening added safety by providing a verbal, visual, or auditory warning message prior to the door closing.

We also offer options that provide added features and flexibility to upgrade the fire door release device system, including voice boards, transformers, and an FDR plug-in Option card.





Smoke detectors can be used to provide a local alarm signal that activates the release device. Three types of detectors are available: Photoelectric, Photothermal detectors, or Ion detectors.



Heat dectectors provide an alarm signal that activates the release device when the ambient temperature reaches a fixed point. They are available in fixed temperatures of 135 and 194 degrees Fahrenheit.



A speaker/strobe is an audible/visual notification device used in conjunction with our optional Voice Board. The speaker/strobe is available in 12VDC, 24VDC, or 120VAC. A stand-alone speaker is also available. All speaker/strobes are ADA-compliant.



Notification devices provide a visual and/or audible warning notification. Available types include a stand-alone horn, stand-alone strobes, or a combination horn/strobe. Each type is available in 12VDC, 24VDC, or 120VAC. All notification devices are ADA-compliant.



Notification devices provide a visual and/or audible warning notification. Available types include a stand-alone horn, stand-alone strobes, or a combination horn/strobe. Each type is available in 12VDC, 24VDC, or 120VAC. All notification devices are ADA-compliant.



The transformer is used in conjunction with an AFCB model when line voltages other than 120VAC are present at the door installation. Transformers are mounted within an UL508 approved enclosure and are available in the following two options: 90-TRNSFRMR-2 (208VAC 1/3 Phase, 230/460VAC 3 Phase), and 90-TRNSFRMR-5 (575VAC 3 Phase).



The FDR plug-in option card is for use in conjunction with the LiftMaster® Logic 3-equipped operator. It facilitates field connections between the LM21AFCB and the operator by reducing the standard 10-wire interconnection to a basic 4-wire phone cord. Both the FDRCARD and the AFCB are equipped with an RJ-11 phone jack as standard to accept the phone cord. The FDRCARD also eliminates the need for ordering the operator with auxiliary open and close limits, which are required for all non-Logic 3 operators.