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| How to choose high-quality access controller |
Just like the engine of automobile, access controller is the center of access control system. The stability of access controller is directly influenced by its quality, which directly influences the security of customer's life and property.
Although the function of numerous access controllers in the China market at present is similar, the quality is different. It is very important to select the type of the products for project trader. Then how to choose high-quality access controller? We summarize the following experience to share with everybody together through practice for many years:
Our principle is " steady and reliable performance , practical function , lower prices and constant service ability of the localization ".
First, defend the crash
The crash of the access controller just as the automobile engine stops working. No matter how strong the function that design primary, the crash will make the controller can't work and make any function unable to embody. If crash appearance in using, the area where this controller controls is unable to come in and go out normally, which may even cause serious potential security hazard and inestimable loss.
Second, capacity of the relay
The output of access controller is controlled by the relay. When controller working, the relay opens and closes frequently and an instantaneous electric current adopt every open and close. If the relay is too small in capacity, the instantaneous electric current may exceed the capacity of the relay and will damage it soon. On general situation, the capacity of the relay should be 3 times greater than the peak electric current of electricity lock.
Third, protection of the controller
Generally, working voltage of components and parts of access controller is 5, if voltage exceeds 5, the components and parts maybe damaged and make controller unable to work. Thus the protection of dynamic voltage is required in all input port and output port of the controller in order to avoid the components and parts damage when the large possible voltage of the external world is loaded on the controller.
Forth, adaptive function of the front input equipment
Different users and application requires different input equipment of access control system, so an access controller is required to compatible many kinds of front input equipments (for example: support Wiegand26Bit, Wiegand32Bit, Wiegand27Bit, ABA (the second track), biological identification technique, fingerprint identification technique, proximity IC card, password keyboard, watermark magnetic stripe card, etc.), and can measure the front input port automatically.
Fifth, reliability of the management software
A high-quality access control system not only needs high-quality controller, but also needs support of high- reliable management software with fault-tolerant ability.
Sixth, two respects included in after-sale service
First is intact technical support system, which including offer localization support before sale and technical support after sale; Second is strong follow-up research and development ability, which can ensure the continuity and advance of product.
Seven, quality authentication
The sale of access controller and serial products must through the " pattern examination" (not trust examination) by China Ministry safe and alert of Public security equipment examination center, and the software should through the test of the China software center. The products should be produced by professional electronic manufacturer with ISO9000 authentication (such as military enterprise).
Eighth, price
The experience of IT industry tells us a truth: An strong enterprise can offer high-quality and price advantage products to meet customer's demands, and can guarantee the project trader obtain reasonable profit from it.
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| Informant: Digitalor Tech (Beijing) Co., Ltd. |
| Note: The article once issued in << HC information ---security technical market>>on 30 Oct.,<< Safe & Automation>> in July and << Security Bimonthly Talk >> on 15th July of 2003. |
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Access Control