The principle of hotel food elevator and the master of electrical control wiring? Urgent!

The factory design is interlocking automatic control. The travel switch controls the rising stop point and the falling stop point respectively, the contactor controls the lifting (forward and backward rotation of the motor) of the vegetable feeder respectively, and the button switches are installed on the first floor and the second floor respectively. The switch on the first floor controls the "rise" of the vegetable feeder, and the switch on the second floor controls the "fall" of the vegetable feeder. 220V coil is mainly used for safety reasons and convenient use of control transformer. In practical use, three-phase four-wire coil or 380V coil can be used.