Traditional relay automatic gate control circuit

Automatic doors are often used in hotels, restaurants, banks and other entrances.
(1) Traditional relay control circuit
The installation positions     of automatic doors, detectors, limit switches and other components are as shown in the figure. The automatic door action requirements are as follows.
    ①When someone approaches, the door opens automatically.
    ②Keep the door open until there is no one in the door passage.
    ③When there is no one in the door passage, the door will automatically close in a short time.
    Typically, doors are driven by electric motors with safety clutches, which avoid trapping people. The control system is connected to the mains supply via a main switch .