User's Manual

Reader Functionality
28 AY-H6355BT Installation and User Manual
Where: D = 1
st
(LSB) byte of card serial number
C = 2
nd
byte of card serial number
B = 3
rd
byte of card serial number
A = 4
th
(MSB) byte of card serial number
Option 5: Wiegand 34-Bit
In this mode, 4 LSB bytes of card serial number are transmitted in
Wiegand 34-Bit format. Bytes are sent in reversed order. The LSB part
of the card serial number is sent first and the MSB byte is sent last. An
even parity is sent first, followed by 32-Bit data and an odd parity bit.
(EP) AAAA AAAA BBBB BBBB CCCC CCCC DDDD DDDD (OP)
Where: EP = Even parity for first 16 data bits
OP = Odd parity for last 16 data bits
A = 4
th
(MSB) byte of card serial number
B = 3
rd
byte of card serial number
C = 2
nd
byte of card serial number
D = 1
st
(LSB) byte of card serial number
Option 6: Wiegand 40-Bit
In this mode, 4 LSB bytes of card serial number are transmitted in
Wiegand 40-Bit format. Bytes are sent in reversed order. The LSB part
of card serial number is sent first. The last byte sent is a Checksum
byte generated by adding 4 data bytes and discarding the remainder
beyond 8 bytes.
AAAA AAAA BBBB BBBB CCCC CCCC DDDD DDDD (CSUM)
Where: A = 4
th
(MSB) byte of card serial number
B = 3
rd
byte of card serial number
C = 2
nd
byte of card serial number
D = 1
st
(LSB) byte of card serial number
CSUM = Checksum value, 1 byte (A+B+C+D)