About the Wiegand format
The name “Wiegand” occurs in a variety of contexts. For the purposes of this document, it refers to the badge format or the
associated reader-to-controller interface. The Wiegand Format Editor is required to define badge formats.
The system supports from 25–bit to 256–bit Wiegand formats.
Figure 17. Standard 26–bit Wiegand format
The parity bit confirms the accuracy of the transmitted binary data by totalling the number of ones (1). If the total is an odd number, the format sets the parity bit to zero (0). If the total number of ones is even, it sets the parity bit to one (1).
Figure 18. Wiegand badge with embedded wire
Wiegand badges contain strips of wire embedded in the badge. When a person inserts a badge into or passes it through the set of magnetic field coils in a Wiegand reader, each strip sends a binary signal back to the reader.