Quiet and powerful DC Brushless motor is used. Special functions & various signal inputs/outputs are equipped as standard options. Middleweight type (Suitable for building) By equipped with DC Brushless motor, quiet and smooth opening/closing movements have been achieved. The door has various functions such as “Press Closing,” “Memory,” “Catch-Return,” “Beam Switch,” and “Special functions.” In addition, it can input/output other kinds of signals by use of “input/output optional set.” Also, the rail can be easily replaced at the site for the maintenance as removed from the channel very easily. Features No gap between the door-meet sides by press-closing function suitable for windy sites, wavering places as in vehicles. Keeping data of door stroke and brake position once memorized at the installation time by memory function equipped in controller. With “Catch-Return” function meaning the door returns when hit an obstacle during the operation. The various special functions can be used promptly by means of “Switch Setting” fixed inside the controller.