... programmable modes including provision to interface with builidng security system, monitoring the doors position status,built-in UPS,etcb ... for BEA photocell to prevent from clamping personb)Auto-reversing when confronting with obstacle.c)UPS when power fails ... passaged) The microcontroller also provide the interface for alarming system ,safety system ,etce)Fuse protection at 3A, 250Vf)Protection when ...