... programmable modes including provision to interface with builidng security system, monitoring the doors position status,built-in UPS,etcb ... passaged) The microcontroller also provide the interface for alarming system ,safety system ,etce)Fuse protection at 3A, 250Vf)Protection when working ... supply circuit , the door moves very stably.c)Panasonic track and anti-derail rubber on the hanger roller to ...