First, according to whether the network is classified: 

divided into independent access control system and networked access control system. 

(1) Independent access control system 

can not communicate with the computer, the access control permission is set on the keyboard or mother card of the machine. There are also some independent access control machines with LCD display auxiliary keyboard and other card authorization.

1, independent access control system components:

Independent access control machine (including reading card and control) + door button + electric lock + power + induction card Some can also be connected to an external card reader to realize the card.

The appearance of several independent access control machines based on Nabon brand

2, the advantages of independent access control system:

The price is relatively cheap, no need for computer knowledge of the decorator can be installed.

3, the disadvantages of independent access control system:

The security is poor, because the relay that controls the electric lock is in the integrated machine, the illegal personnel do not need too much professional knowledge to open the door by short-circuiting or destroying the independent access control machine, and even some can open the relay in the independent access control machine through strong magnets to open the electric lock. Although some manufacturers have made improvements, placing buttons and relays inside the power supply, it has not fundamentally improved the safety factor. If a company has multiple doors that need access control, it needs to be set and cancelled one by one, and the setting work is quite troublesome, and it is not known which doors have set what permissions.

Therefore, the independent access control system is suitable for the security level is not high (the occasion of preventing gentlemen from preventing villains), the cost budget is very low, the number of doors is not many occasions, and there is no need to quickly authorize and analyze the access control records.

(2) Networked access control system

Be able to communicate with the computer, through the access control management software installed on the computer to set the permission of the card and analyze the access control records. The computer is not open, the system can also run normally offline. The software can be used to set permissions and parameters, and can monitor the access of each door in real time. Attendance reports can be counted.

1, networking access control system components:

Access controller + card reader + exit button + communication hub + sensor card + power supply + access control software.

Note: If you connect two card readers, do not open the door button, you can realize the card to enter and leave the door. If you connect the password reader, you can realize the card + password function to prevent the card from being picked up by others and illegal entry. The security level is higher. Biometric identification devices with international communication interface WG26 output format (fingerprint meter palm meter, etc.) can replace the card reader and connect the controller to achieve a higher level of security access control system.

Second, according to the communication mode of the access control controller can be divided into

485 Networked access control system and TCP/IP network access control system (LAN and WAN)

The following is the networking mode of a typical 485 networking access control system

The following is a typical TCP/IP network access control system LAN networking diagram

Note: In addition to RS485 and TCP/IP on the market, there are other bus structure access control systems such as LAN bus, etc., because these products are not many on the market, and have their own advantages and disadvantages, here will not do a detailed description.

1, the advantages of networking access control system:

The system has high safety factor, good cost performance, powerful functions, convenient operation, and can be derived from value-added functions such as attendance attendance through the analysis and management of card record data. Among them, TCP/IP network access control system, technology is more advanced, communication speed is faster, networking range is wider, communication is more stable, because the price is slightly more expensive than 485 network access control system, the popularity of the current 485 network access control system, but will become the mainstream of the network access control system in the near future.

At present, the mainstream and trend of access control systems are networked access control systems, which are the first choice for mid-end and high-end users.