Elevator button interface board The elevator button interface board is a conversion interface between the card reader and the elevator button, and each elevator button interface board controls the seating permission of the 4-layer elevator button. The permission control of each elevator button requires two relays to be completed (relay A and relay B respectively), in which relay A completes the ladder control and uses a pair of normally closed contacts; relay B completes automatic registration, using a pair of normally open Contact. It can be seen that 8 relays are required to control the 4-layer elevator button, so there are 8 relays on each elevator button interface board.
When the elevator button interface board sends a fault in the card reader, the elevator will automatically return from the security state to the bypass state, which will not affect the continued use of the elevator under normal conditions. According to the above analysis, if the number of elevator floors to be controlled by the data processing module reaches 64 floors of the front door and 64 floors of the back door, and the total number of floors of 128 floors, a total of 32 elevator button interface boards are required.
The data in the newly purchased S50 smart card memory of the card maker is blank, and the password is also the default. Such a new card is called a blank card. Blank cards can only be used if they are encrypted on the card maker dedicated to this system. The card reader completes the encryption of the blank card according to the same password authentication rules as the card reader, and writes the data required by the elevator security system to the sector specified by the card in a pre-agreed format. The above functions of the card maker need to be completed with the support of the computer management software, and the RS232 serial port connection between the card maker and the computer management software is adopted.
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