The LiftMaster AUXREL Auxiliary Relay Board is an OEM accessory designed to expand the dry-contact output capabilities of compatible LiftMaster gate operators and commercial door operators. By adding additional auxiliary relay outputs, it enables clean, isolated signaling to third-party devices for integration and automation tasks such as activating warning strobes or horns, signaling access control and intercom systems, triggering building automation inputs, or providing status/annunciator signals to security panels. It functions as a relay expansion that works in tandem with the operator’s logic controls, allowing installers to assign actions based on operator events like open, close, fault/obstruction, alarm, or timer-to-close behavior, as supported by the specific operator model.
Intended for use with select LiftMaster operators that support the AUXREL accessory, this board connects to the operator control system and is configured through the operator’s programming menus where available. The relays provide dry-contact switching for low-voltage signaling; any high-current or mains loads should be controlled through a properly rated external contactor. Installation should be performed by a qualified technician following the operator manual, UL 325, and applicable electrical codes, with power removed during wiring and setup. Ideal for residential or commercial applications that require enhanced integration, the LiftMaster AUXREL Auxiliary Relay Board serves as a reliable replacement part or upgrade path to add flexible automation and monitoring outputs without modifying the primary control board.