Automatic door system Slim profile,big power motor, PLC techniques,Visiable screen ... reversing when confronting with obstacle.c)UPS when power fails to provide escaping passaged) The microcontroller ... door working. 24V,55W, DC bruthless motor have big power to hold 150kg panels, work a long time ... of advanced synchronous belt and perfect design of power supply circuit , the door moves very stably ...