1. Vcc: This pin provides +5/+12 Volts to the reader.
2. Data D0: Data D0 at this pin.
3. Data D1: Data D1 at this pin.
4. Wiegand red: Switches on the red LED on the wiegand reader indicating access is denied.
5. Wiegand green: Switches on the green LED on the wiegand reader indicating access is granted.
6. Wiegand buzzer: The buzzer is switched on for finite time duration each time the access is denied or granted.
7. Wiegand tamper: If the wiegand reader is tampered, the reader gives a high signal as output on the tamper pin. This pin is then connected to the micro-controller which controls the further action to be taken.
8. Wiegand ground: It provides ground or 0 Volts to the wiegand reader.