The LiftMaster 02-403-N4XALD is a wired 3-button control station designed for commercial and industrial door operators that use separate OPEN, CLOSE, and STOP commands. Built in a NEMA 4/4X/12 rated enclosure, it’s suitable for indoor or outdoor locations where water, dust, or corrosive environments are present, making it a dependable choice for warehouses, loading docks, car washes, and similar applications. As a replacement part or an upgrade, this weather-resistant control station provides straightforward, intuitive operation for LiftMaster commercial door operators that accept a standard three-button wall station.
Installation involves hardwiring the control station to the operator’s control terminals and sealing conduit entries to maintain the NEMA 4/4X/12 rating. For safety and code compliance, follow UL 325 and local regulations; many commercial systems require constant-pressure-to-close operation unless compliant primary entrapment protection is in place. Mount the station where the operator has full line-of-sight to the door. Compatibility is generally with LiftMaster commercial operators supporting a 3-button input; confirm requirements in your operator’s manual before installation. Qualified professional installation is recommended.