The WECO Elevator Door Detector (Light Curtain, Door Safety Edge) features 94 Non-parallel infra-red beams and 32 pairs of diodes. * 120 VAC Power Unit *ables are true traveling cables with plug-in connectors *atented software is designed to put the system into a less active state when the elevator is not in use and prolong the life span of the detectors.hen the detectors stop very close to each other, the power reduction mode is operated after a delay of about 10 seconds.nthis mode the scan speed is reduced to once every 2 seconds.f the doors start to open, or an obstruction is detected, then the normal scanning and trigger mode is resumed. *orks with both center opening and side sliding doors. *ithrithout nudging. *nti-Sunlight function *SA Approved *eets all ADA and ASME requirements