Cornick Help Center

    Wiring of card readers for long distance

    August 17th, 2021

    The maximum distance of a card reader to the access controller is 100m using CAT5E/CAT6 cable. However, with this distance, the voltage of the card reader drops due to internal resistance of the cable, so we must pair up the wire to reduce voltage drop.

    Signal
    CAT5E/CAT6 Cable
    +12V
       Green/White + Green + Orange/White 
    RS485+
       Blue
    RS485-
       Blue/White
    GND
       Orange + Brown/White + Brown

    In this configuration, the voltage at the card reader is approximately 10.8V, enough to maintain stable operation.

      

    Was this article helpful?

    Send feedback

    Can’t find what you’re looking for?

    Our customer care team is here for you.

    Contact Support