The CAN BUS-based Access Control Security System

The Access control security system becomes one most important part of the city safe establishments and it is the symbol of the aptitude modern buildings. It will have the good market for the high importance of the safety.This paper first introduced the Access control security systems, pointed out the shortness of the RS-485 BUS using for the Access control security systems. The main purpose of the paper is by analyzed the using of the CAN BUS. Explain the base theories of the communication between the Access control system and the ID recognize machines, showed the way of using the CAN BUS, and solved the engineering problems of the Access control security system. It mainly proved the project from the theories bases and the hardware using, it provide the ways to solve the problems that is possible to meet during the design and the engineering.The CAN BUS is fit for the real time communication of the Access control security system. Besides that there are many card readers scattered in the whole system, the easy consumption way of the CAN BUS is well fit for this situation.