How to choose access control non-contact IC card reader

The contactless IC card (inductive IC card) card reader is an important part of the access control system. It is a key device for the signal input of the access control system. If the access control system is like a person, the card reader is like a human. eye. Related to the stability of the entire access control system. . If the controller and electric lock of an access control system are good, if there is a problem with the quality of the card reader, it will also cause the door to not open, etc., affecting the acceptance and use of the project.

Note 1: Whether to buy a domestic card reader or an imported card reader?

Real imported card reader, the technology is relatively mature, the product's repair rate is low, and the design is beautiful and durable. Disadvantages are: the price of the product is expensive, the service does not have a domestic card reader in time, and the imported sensor card of the matching brand must be used, and the imported sensor card is also relatively expensive. Unless the customer specifies the use of an imported brand of card readers, the author recommends the use of domestic card readers, but be sure to choose a card reader provided by a manufacturer with good domestic quality reputation and service. The appearance of the domestic card reader has also made great progress in the past two years, and it is almost keeping up with the internationally popular styles. Imported card readers are 6-10 times the price of domestic card readers, and imported cards are 10-20 times the price of domestic cards. The core chips of domestic card readers and cards are processed by foreign radio frequency chips, and the domestic chip development and production capabilities in this field are not yet available. Imported card readers are recommended to use Inddala (Motrola) 605 card readers and HID 6005 card readers, which are relatively cost-effective. Many domestic card readers casually affix a brand that does not exist in foreign countries, mark a country of origin, or have a fake certificate of origin. There are many things to buy dog ​​meat on the sheep's head, and the engineer should pay attention. Don't waste money, and haven't bought a good product, which has caused a lot of trouble.

Note 2: Purchase Wiegand 26bit card reader that meets international standards

The internationally accepted interface protocol standard for RF card readers is wiegand 26bit, and some domestic and Taiwanese card readers use 485 or ABA magnetic stripe format. Or for other bit numbers, the author recommends wiegand26 card readers. Imported card readers such as Indala HID all comply with this agreement. Almost 99% of domestic or imported controllers comply with this agreement. If a non-standard interface protocol is adopted, It will bring great compatibility problems for future system upgrades and maintenance. It is also not recommended that you purchase card readers with multiple output formats to avoid disturbances during use. Card readers with multiple output formats are only set by manufacturers for commercial considerations such as saving development and plate-making costs, and are not really powerful in a real sense. The use of Wiegand 26 card readers in accordance with international standards can bring great convenience to the stability of your system and the replacement and maintenance of card readers in the future.

Note three: whether to choose ID card reader or IC card reader?

The ID card reader is a common name for read-only contactless IC cards, and the IC card reader is a general name for readable and writable contactless IC cards. The performance price ratio and sensing distance of ID cards and ID card readers are better than those of IC cards and IC card readers. If it is only used for access control and attendance or parking lot card, it is recommended to use ID card reader and proximity card. . If you need to be compatible with non-fixed consumption cards, you can only use IC card readers and proximity cards. The ID card is more popular in the market and the cost-effective is the EM card. IC card readers and proximity cards are recommended to use PHILIPS MIFARE 1 (abbreviated as M1). Other logic or TI TM cards have a low market share and are not recommended.

Note 4: Do not judge the quality of the domestic card reader from the appearance.

Most domestic card readers use public molds, or copy the appearance of foreign card readers. The mold is common to everyone, and anyone can buy the casing, so even if the same appearance of the card reader may be produced by different manufacturers, the service and quality are also different. The engineering company must have a detailed understanding of the card reader, and don't distinguish between the appearance and the price. It is recommended that engineering companies buy card readers from the place where the access control controllers are purchased. Generally, access control controller manufacturers will either sell or produce card readers with similar quality standards. So, how to judge the quality of a card reader? The author believes that some domestic card readers use analog circuits to replace radio frequency base station chips in pursuit of low cost of production. This card reader has a large operating current, which is easy to crash or be damaged. It is recommended. It is better to choose a card reader that uses U2270B imported radio frequency base station chip. Of course, you also need to judge from the usage time and repair rate of the card reader of the manufacturer you purchased previously for more than half a year, as well as the quality standards and reputation of the manufacturer. In addition, the card reader is a device used for a long time, and there must be a circuit to prevent crashes in the circuit design. This point should also be paid attention to.

Reposted from: China Security Project Forum http: //

Note 5: Is the card reader with or without sealant selected?

It is recommended to use a card reader without sealant. The reason is: even if the glue is sealed, the buzzer is still exposed, and the water will damage the card reader. The material used for the sealant is resin. Generally, the manual sealant Curing Agent is used in China. The domestic resin material is cheap but the quality is not good. After a long time of use, there will be conductivity, which makes the card reader run chaotic or Crash, imported resins are expensive, and domestic manufacturers are generally reluctant to adopt them, and each card reader costs a dozen pieces evenly. In addition, the sealant has become the "covering cloth" of some manufacturers, covering up the poor circuit board design process, and even re-sealing the repaired board for sale. In addition, the sealant is not suitable for heat dissipation of the device, which also affects the performance of the card reader. Therefore, unless there are special occasions, it is generally not necessary to use a sealed card reader. On special occasions, some waterproof protection for the card reader is sufficient.