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For any technical Question & Problem, pls feel free to send email to:  tech@sinolisecurity.com

1. What is Anti-Passback(A.P.B) function of Access Control System


The Anti-passback is a kind of special function of access control system. For Access Control System, Particularly, used in the Army, Defense Scientific Research Department, etc. We usually require the swipe card records must be one-enter-one-exit. That is mean the card holder must swipe the same card to exit if he swipe the card to enter the room before. This function have the following features:
   1.) If someone enter the door following others without swiping his card, next time, he cannot swipe his card to exit, even if his card is valid. On the contrary, If someone exit from the door following others without swiping his card, next time, he cannot enter the door again by swiping his card.
   2.) If someone pass this card to others outside through the window after entering the door, the one outside cannot use the same card to enter again.
   3.) If someone just swipe his card and do not enter the door, next time, he cannot swipe this card any longer to enter the door.


2. Networking Access Control Solutions:
     


3. Access Control System Connection:
Scheme 1: Access Control Powe Suppy working together with Access Controller with" PUSH" output.




Scheme 2: Access Control Power Supply working together with Access Controller without "PUSH" output.


Scheme 3: Common Power Supply(Switching Power Supply) workin together with Access Controller without "PUSH" Output.