How to choose a good elevator ic card manufacturer?

1, check the manufacturer's authoritative quality certification

Check the product inspection reports provided by authoritative government quality supervision institutions. And pay attention to verify the authenticity of these documents, and the quality of products with corresponding third-party certification and supervision will be guaranteed.

2. Select the access controller with anti-collision and self-checking circuit design.

If the access controller crashes, it will cause users to be unable to open or close the door, which will bring great inconvenience to customers and increase the maintenance and cost of users. Access controller must install reset chip or choose CPU with reset function. 5 1 series CPUs generally do not have reset function, so reset chips need to be installed. At the same time, it must have self-checking function. If the circuit crashes due to interference or abnormal conditions, the system can self-check and start itself in an instant.

3. The entrance guard controller adopts three-level lightning protection circuit design.

Because the communication lines of the access controller are distributed, it is easy to be attacked by induced lightning, so the access controller must be designed for lightning protection. Three-level lightning protection design is recommended. Firstly, the large current and high voltage generated by lightning stroke are released through the discharge tube, and then the current and voltage entering the circuit are clamped through the inductance and resistance circuit. Then the residual current and voltage are discharged at high speed through TVS high-speed discharge tube before damaging the circuit. The lightning protection index requires that 4000V induction lightning will not damage the equipment for 50 consecutive times. The lightning protection index is high, and the anti-surge and anti-static capabilities of the equipment are correspondingly high. Some products advertise that they also have the lightning protection capability of1500 V V. In fact, this indicator is that all chips have their own lightning protection and surge protection capabilities.

4. The registration card has a large storage capacity and offline records, and the storage chip needs non-volatility.

It is suggested that the authority of the registration card should reach more than 6,543.8+million, and the offline storage record should reach 6,543.8+million, which can meet the requirements of most customers for storage capacity and facilitate attendance statistics. Non-volatile memory chips such as Flash must be used, so that information will not be lost in case of power failure or impact. If the mode of RAM+ battery is adopted, the battery is dead or loose, which may lead to the loss of information or the failure of the access control system.

5. The design of communication circuit should have self-checking function to meet the needs of large-scale system networking.

The networking of access controller usually adopts 485 industrial bus structure. Usually, many manufacturers choose max485487 or 1487 chips to save costs. The load capacity of these chips is weak, usually the maximum load capacity is 32 devices, and the failure of one communication chip in the bus will affect the communication of the whole communication line, and it is impossible to find out which controller chip is damaged.

It is suggested to adopt high-grade communication chips and integrated circuits similar to max3080, which have self-checking function. If the chip is damaged, the system will automatically disconnect, allowing the control devices on other buses to communicate normally.

6, the application should be simple and practical, easy to operate.

If the control program is applied, it will undoubtedly increase the training cost and time of users to customers, and customers will also be angry with users' service attitude, which will have a bad influence on the collection and renewal of orders. Customers who don't understand the software are also prone to misoperation, causing practical inconvenience. Therefore, it is suggested that users should pay attention to whether the operation of the software is simple, intuitive and convenient when choosing the access controller. One-sided emphasis on powerful functions is not suitable for promotion.

7. High-power relays of well-known brands should be selected with current feedback protection at the output.

The output of entrance guard controller is controlled by relay. When the controller is working, the relay should be opened and closed frequently, and an instantaneous current passes every time it is opened and closed. If the relay capacity is too small, the instantaneous current may exceed the relay capacity, which will soon damage the relay. In general, the relay capacity should be more than 3 times of the peak current of the electric lock, so it is recommended to choose a relay with a rated working current of 7A. The output terminal is usually an inductive device with high current, such as an electric lock. The instantaneous on-off will produce the impact of feedback current, so the output terminal should be protected by components such as rheostat or reverse diode.

8. The input circuit of the card reader needs surge protection and misconnection protection.

When users are in construction, they are often wired or debugged with electricity. Due to accidental negligence, wrong wiring of card reader or carelessness, local short circuit may be caused. If there is no surge protection and wrong connection, it is easy to burn out the central processing chip, resulting in the damage and failure of the whole controller, which needs to be sent back to the manufacturer for maintenance, which may delay the construction period and increase the construction cost. Good protection can make the circuit not burn out even if the power supply is connected to the data end of the card reader. Anti-surge dynamic voltage protection can prevent the quality problems of the card reader from affecting the normal work of the controller.

9. Buy from the manufacturer or agent of the controller.

Only by directly looking for a manufacturer or a manufacturer's agent to buy, can it be possible or perfect with strong technical services, perfect after-sales service as a guarantee, and reliable follow-up research and development capabilities to ensure the continuity and advancement of products. The price of buying controllers from other channels may be lower, but technical support and after-sales service may not be enough.

You can refer to the ic card system of Oddo elevator.