What is the access card reader
???The user's needs are constantly changing, in the design of the system should leave some room to ensure that the user's dynamic needs. For example, each sub-control module in the system has a unique address, need to increase the number of controlled gate, as long as the increase in the corresponding number of sub-control module and access control subsystem, and sub-control module can be assigned a unique address.
????In order to reduce the hardware cost, a sub-control module can be designed to control multiple doors at the same time. For example, a sub-control module can control three doors at the same time. In fact, this configuration is equivalent to a macro parallel processing mechanism.
As the credit card access control system, all the data set up and management are through the master computer and sub-control module between the communication completed. Managers can according to their own needs, free to set the password, user permissions, door lock delay time. At the same time, the master computer and the sub-control module usually work independently of each other. Only when the initial data in the sub-control module is set, the data in the sub-control module is modified, and the information recorded in the sub-control module is obtained. , For information exchange. This design approach gives the system great flexibility.
Access control cardboard first to consider is the system security, that is, whether the effective control of personnel access, and master its access to information. Because the credit card access control system is an intelligent electronic control system, you can make full use of the computer "smart", while using a variety of means to control to ensure the safety and reliability of the system. Hardware reliability, in addition to electronic control locks and other mechanical parts, the main consideration of sub-control module production and selection, because it should work 24 hours a day, so its performance requirements are higher, should be able to meet the environment Temperature, humidity changes, and anti-electromagnetic interference and strong. If the selection module has a strong adaptive function, can automatically adjust the signal of different baud rate, there are a variety of protection circuits, etc., enough to ensure that the needs of low-level management work.
