How does the Rock use Wiegand and how would it know if access is granted or denied?

The Rock sits between the badge reader and the Access Control System (ACS).

The Wiegand protocol can be used as the communication protocol between the badge reader to the Rock and the Rock to the ACS. The Rock monitors the Wiegand LED signal(s) from the ACS to learn if access was granted.

Please refer to install guide for wiring. The orange and brown wires for Green and Red LEDs are required.