automatic rolling Door Motor Features 1. press button operation, power-driven make shutter open and close,limit switch can control stroke accurately. 2. while no power-driven, pull the hand chain, the doors can be move up slowly, pull down the auto chain , the door can move down auto . 3. With remote control and password button,they can make the doors opened and closed. 4. With fire-proof electronic control boxes and smoke control and the temperature probe sensor, they can detect the fire, the smoke, meet the performance load GB14102-93 standard. 5. With different emergency doors settings,it can close the doors when no power and nobody . The main parameters: Power supply(V/Hz):380/50 Motor power(Kw):0.25 Max.lifting force(Kg):600 Drum diameter(mm):Ø140 Drum speed(R/Min):5.04 Max.hoisting height(m):4.8 Deadweight lowering weight(Kg):12 Gear ratio of big and small chain wheels(gears):55/9 Specification of bushroller chain:10A-1-76 Weight of main engine(Kg):12