Traditional relay electric gate control circuit a

There is often a gate at the entrance of a company or enterprise
, and this gate is controlled to open and close by the guard.
(1) The schematic diagram of the traditional relay control circuit
    electric gate is as shown in the figure. The requirements for the gate control
system are as follows.
    ① The gate is opened, closed and monitored by the guard, who
controls the gate through buttons in the guard room.
    ② The door is usually fully open or fully closed, but the switch
    ③ The alarm light starts flashing 5 seconds before the door is about to move. As long as the door is moving, the alarm light continues to flash.
    ④A safety pressure baffle is installed to ensure that no one is injured and no items are caught or damaged when the door is closed.