Hello, MC-5824T two doors access control board does not open the door by swiping the card, and the FCARD3500T data monitoring display card number keeps changing. What is the reason?

Hello, please check the Wiegand wiring of the card reader, if you make sure the wiring is OK. Please connect the reading head directly to the control board without wiring, if the card is normal. Please check if there is strong electricity and interference in the field wiring, if it is directly connected to the control board, the card number will change, please replace the card reader.