Practical Security Products Two Doors Access Control Board

As the name suggests, Two Doors Access Control Board is able to manage the access management of two doors or two channels at the same time. It is especially important for the engineering company to choose. The stability and convenience of the Two Doors Access Control Board is self-evident and functional. Practicality is also an important criterion.

Choose Two Doors Access Control Board with anti-crash and self-test circuit design.

If the access controller crashes, it will make the user unable to open the door or close the door, which will bring great inconvenience to the customer. At the same time, it will increase the maintenance and maintenance cost of the engineer. The access controller must be installed with a reset chip or optional. CPU with reset function, generally 51 series CPU does not have reset function, you need to install reset chip. At the same time, it must have a self-test function. If the circuit crashes due to interference or abnormal conditions, the system can self-test and self-start in an instant.

Purchase Two Doors Access Control Board with three-level lightning protection circuit design.

Since the communication line of the access controller is distributed and vulnerable to inductive lightning, the access controller must be designed for lightning protection. We recommend a three-level lightning protection design, which first discharges the large current and high voltage generated by the lightning strike through the discharge tube, and clamps the current and voltage entering the circuit through the inductor and the resistance circuit. The residual current and voltage are then released at high speed by the TVS high speed discharge tube before it damages the circuit.

Purchase the Two Doors Access Control Board with self-test function.

The networking of access controllers is usually networked using the 485 industrial bus structure. Usually, many manufacturers choose max 485 487 or 1487 chips for cost savings. These chips have weak load capacity, usually the maximum load capacity is 32 devices, and if there is any bus A communication chip damage can affect the communication of the entire communication line, and it is impossible to find out which controller chip is damaged. We recommend using high-end communication chips and integrated circuits like max3080. The circuit has a self-test function. If the chip is damaged, the system will automatically disconnect the connection to make the control devices on other buses communicate normally.

In short, the purchase of the practical Two Doors Access Control Board also requires the choice of products with three conditions in order to make it outstanding.

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