THE 26 BIT WIEGAND DATA OUTPUT FROM THE EM CARDS
Even parity
the trailing parity bit is an
Odd parity
bit from the last 12 bits. The data transmitted is in
Binary codes
for the Card reading
.
Example 1: Wiegand Output of Reading An EM Card
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 does not belong to this system
and can be ignored.
a) The Code Marked on One of The EM Cards :
The ID Code to be read for Wiegand Output The Code does not belong to this
system
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
b) 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
E
ven Parity Bit of
6 4 E = 0
An
O
dd Parity Bit of
B 1 3 = 1
c) The 26 bits Wiegand data sending out in Binary after reading of 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
NOTE:
considered of reading a Card. The keypad provides Wiegand Data output for the Card only and the
User PINs attached are NOT taken into account for the Wiegand output.
0006613779 008,18789
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