The LiftMaster LC36M Monitored Light Curtain is a commercial door safety sensor designed to enhance entrapment protection beyond a single photo eye. Using a dense array of infrared beams, it creates a continuous protective field near the floor across the door opening to detect pedestrians, pallets, forklift tines, and vehicles. When an object interrupts the beam field during closing, the operator receives a stop/reverse command, helping facilities achieve UL 325–compliant operation with a monitored entrapment protection device. This light curtain is commonly installed on sectional, rolling steel, and grille applications in warehouses, loading docks, logistics centers, automotive service bays, parking facilities, and industrial plants.
The LC36M is a monitored accessory engineered for compatibility with LiftMaster commercial door operators that accept monitored safety inputs, enabling safety features and advanced functions such as automatic closing on supported models. It mounts to the jambs on each side of the opening and connects directly to the operator’s monitored entrapment terminals; proper alignment, wiring, and functional testing are required per the operator manual and UL 325 practices. As a replacement part or upgrade over standard photo eyes, the LC36M expands the detection zone to improve safety in high-traffic commercial environments. For best results, verify compatibility with the specific LiftMaster logic/control board, follow all programming and testing instructions, and inspect the light curtain regularly to ensure reliable operation.
