1.？ The second door is also called double door interlock and AB door interlock. Access card reader (or fingerprint access control equipment) and double-door interlocking controller are required. Many important passages of the bank (such as the passage leading to the working hall of the savings office) are equipped with two doors, which are required to be interlocked to effectively control rear-end collision or orderly entry.
2. When the first door is opened in a legal way, if this door is not closed, the second door will not be opened; When the first door is closed, the second door can be opened. Similarly, if the second door is not closed properly, swiping the card will not open the first door. According to the need, three-door interlock and four-door interlock can also be used. The principle of technology realization and application are the same.