Instructions

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26 Bit Wiegand Data From EM Cards
26-bit EM Card is the most popular one on the market. Almost all the controllers can use the 26-bit standard format.
A 26 bit Wiegand protocol for card reading has 1 rst parity bit, 24 bits of the Card ID, and 1 stop bit for a total of 26
bits. The rst parity bit is an Even parity bit calculated from the rst 12 bits of the code and the trailing parity bit is an
Odd parity bit from the last 12 bits. The data output is in Hex Binary codes.
Each EM card or Keyfob is marked with an unique ID in Decimal Digits that is the code read by the reader. The EM
Card is also marked with a “3 digit + 5 digit” code that are the site code and ID number arrangement of the Wiegand
data.
EXAMPLE:
The Code Marked on One of The EM Cards:
0006613779 008,18789
100,60179
The ID Code to be read for Wiegand Output The Site Code and the ID number
The Code in Decimal Number: 6 6 1 3 7 7 9
The Code 6 6 1 3 7 7 9 Equivalent to Hex Number: 6 4 E B 1 3
Each Hex Number Consists of 4 Bits, Total 26 Bits of Wiegand Data Output from Card Reading:
E 6 4 E B 1 3 O
An Even Parity Bit of 6 4 E = 0 An Odd Parity Bit of B 1 3 = 1
The 26 bits Wiegand Data Sending Out in Hex Binary from Reading The Card:
0 0 1 1 0 0 1 0 0 1 1 1 0 1 0 1 1 0 0 0 1 0 0 1 1 1
The Arrangement of The Site Code and ID Number of A 26-bit EM Card:
• Site Code: Bit 2 ~ 9 (000~255)
• ID Number: Bit 10 ~ 25 (00000 ~ 65,535)
Wiegand Data Output From User Codes
Wiegand data is also a common media between keypad unit and control panel for the user codes in an access control
system. This reader-keypad accepts user codes up to 8 digits for generating Wiegand data. Some precautions are
required in taking user code to generate Wiegand data.