Design scheme and principle of access control system

Access control system is an important part of intelligent building security automation system, and it is also one of the necessary systems for all intelligent buildings. According to the latest design standards of intelligent buildings, access control system, burglar alarm system, closed-circuit television monitoring system and electronic patrol system together constitute the main part of intelligent building safety system. Therefore, now whether it is a large enterprise or a small enterprise, unit, office building, bank, etc. Even the door of the residential area has begun to use the access control system. Today, we will learn about the design scheme and principle of the access control system.

With the continuous progress of science and technology, people put forward higher and higher requirements for the automation level of work and life, and the access control system was born to meet people's higher-level safety management requirements for modern offices and living places. At present, the commonly used access control systems mainly include biometric identification (fingerprint, palm shape, iris, etc. ) and access control system represented by radio frequency card system.

Different types of doors have different requirements for the installation of access control system. Here, we will introduce the most common access control system as a simple design scheme.

1. This diagram is the structural diagram of the control point of a door, and an AC220V socket should be left near each door as a power socket. It is also necessary to lay an 8-core super Category 5 cable (general computer network cable) to the nearest LAN network switch or hub as a group network cable. These two tasks must be completed. If the access control system adopts the networking mode of 485 LAN, twisted-pair shielded wire is needed to ensure the communication stability of the system. If the access control system adopts the communication mode of TCP/IP, the super-category 5 network cable is selected as the communication line to ensure the normal communication of the system.

2. For places where power is often cut off, you can bring your own battery, and the capacity of the battery determines the length of use after the breakpoint. For places where power is not often cut off, batteries may not be installed.

3. The door magnet is a sensor to detect the state of the door switch. If the door magnet is installed, you can see the action of the door switch and the state of the door on the management computer of the LAN. Similarly, if the door is controlled and managed through the remote Internet, the opening and closing actions and the state of the door can be seen thousands of kilometers away. If users don't need it, they don't need to install it. The wire of the door magnet can be a double-core wire.

4. The exit button can directly control the door opening. Simply press the controller to open the door, and multiple exit buttons can be installed in parallel as required. Go-out buttons are usually installed at the reception desk and security office, so that you can open the door for guests without going to the door. If users don't need it, they don't need to install it. The thread of the exit button can be made of two cores.