Electromagnetic sucker controller: the AC voltage of 380V is reduced by the transformer, rectified by the rectifier to 110V DC, then enters the sucker through the control device. At this time, the suction cup is magnetized the reverse voltage line passes through during demagnetization. The controller achieves the demagnetization function.

Access controller: there are two working modes of access controller. One is patrol inspection mode, the other is identification mode. In patrol mode, the controller sends the query code to the reader continuously receives the reply command the reader. This mode will continue until the card is sensed by the reader. When the card reader senses the card, the response of the card reader to the patrol command of the controller will be different. In this reply command, the reader sends the read code data of the sensor card to the access controller for access control. The controller enters identification mode. In the identification mode of the access controller, the access controller analyzes the code of the sensing card, compares it with the card data stored in the device, performs subsequent operations. When the access controller finishes receiving data, it sends a command to reply to the reader to restore the reader to this state. At the same time, the access controller returns to patrol mode.