Eight factors that determine the safety of the access control system

This article analyzes what impact factors may exist on the safety of a channel gate system . There are many reasons that affect the safety of the channel gate control unit, and usually show the following aspects. :

First, the channel gate power supply is very important, to provide a stable working voltage to the component is a necessary prerequisite, with good filtering and voltage regulation capabilities. In addition, there must be strong anti-interference capabilities, including high-frequency sensing signals, lightning strikes and so on.

Second, the distribution of the control unit: the control unit must be placed in a special weak room or equipment within the centralized management, control unit and reader with long-distance signal transmission capabilities, but can not use Wiegand can only transmit a few meters away Wiegand agreement.

Third, the channel gate control unit must have a variety of real-time alarm capabilities, such as power supply, UPS and other equipment failure prompts, the chassis is opened warning messages, and communications or line failure alarm reporting capabilities.

Fourth, the channel gate controller chassis must have a certain degree of anti-mite, anti-mite, explosion-proof, fire prevention, anti-corrosion capabilities to prevent all kinds of damage.

5. The overall architecture design of the channel control unit is very important. A well-designed channel gate system will try to avoid the use of slotted expansion boards to prevent prolonged use and poor contact caused by oxidation.

6. The output of the channel control unit is controlled by the relay. The relay works frequently. If the current capacity is too small, the relay will be damaged quickly. Usually a high-current inductor plus a resistor or reverse diode protects the control unit.

7. The program design of the channel control unit can not be completely depended on the computer and software. The computer is very unstable. Therefore, all logic judgments and various advanced functions in the well-designed channel system must rely on the access control unit. The hardware system to complete.

8. The sensor and alarm unit parts include various sensors, detectors, buttons and other equipment, and should have certain measures against mechanical damage. A well-designed channel system can encrypt or convert the reed alarm signal and the exit button signal, such as a TTL level signal or a digital signal. At the same time, the channel system can also monitor the following alarm conditions: alarm, short circuit, safety, open circuit, request to exit, noise, interference, shielding, device disconnection, tamper, etc., to prevent human beings from shielding and destroying the switch alarm signal. Improve the security of the channel system.