... door operator, rolling garage door opener 2, 24V DC motor drive unit 3, Rolling code 4, Safety auto-Reverse ,roller ... door opener 1, Inpout Voltage : AC230/110V selectable2, Motor Type : 24V DC motor , Quiet operation and reliability, Drive unit housed within ... the door be restricted. The overload force is adjustable13, photo sensor interface : interface is there for connecting Photo cells, this ...