18
12.2.10
Wiegand signal timing diagrams
The Wiegand communication mode is based on sending
two electrical signals, DATA0 & DATA1, active at low logic
level, as shown by the following diagram. The duration of
the single bit is 50μs, while the pause between one bit and
the next is 2ms.
DATA 1
DATA 0
1
0
1
50µs
2ms
12.3
ISO2 communication mode
The functions available are activation of the code and
password change: the latter is used only to determine
whether, in addition to the user ID entered, we also want
to send channel information (relating to the function keys
1/A, 4/B, 7/C, */D) and not to manage the site code, which
is not provided for in ISO2 mode.
To enable the transmission of channel information, you
must follow the procedure for changing passwords, and
end with the star key * instead of the pound key #.
12.2.7
Wiegand 37bit with SITE code and channel information
DIP1 DIP2 DIP3
OFF ON ON
first bit transmitted
1
bit of “even
parity” of
bits 2-19
2 3
4 5 6 7 8 9 10 11 12 13 14 15
site code
(0...16383)
16 17
bit16 bit17 CH
0
0
A
0
1
B
1
0
C
1
1
D
18 19 20 21
22 23
24 25 26 27 28 29 30 31
32 33
34 35 36
MSbit
LSbit
binary code (0...524287)
37
bit of “odd
parity” of
bits 19-36
12.2.8
Wiegand 50bit
DIP1 DIP2 DIP3
ON OFF OFF
first bit transmitted
1
bit of “even
parity” of
bits
2-25
2 3
4 5 6 7 8 9 10 11 12 13 14 15 16
site code
(0...32767)
17 18 19 20 21
“10000”
22 23
24 25 26 27 28 29 30 31
32 33
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
MSbit
LSbit
binary code (0...268435455)
50
bit of “even
parity” of
bits 26-49
12.2.9
Wiegand 50bit with channel information
DIP1 DIP2 DIP3
ON OFF OFF
first bit transmitted
1
bit of
“even
parity”
of bits
2-25
2 3
4 5 6 7 8 9 10 11 12 13 14 15 16
site code
(0...32767)
17 18 19
“100”
20 21
22 23
24 25 26 27 28 29 30 31
32 33
34 35 36 37 38 39 40 41 42 43 44 45 46 47
MSbit
LSbit
binary code (0...268435455)
48 49
bit48 bit49
CH
0
0
A
0
1 B
1
0 C
1
1 D
50
bit of
“even
parity” of
bits 26-49
Example:
to enable the transmission of channel information, leaving
unchanged as 0000 the site code (unused), enter the
following sequence:
* *
<0000>
#
<0000>
#
<0000>
*
To disable transmission of channel information, type the
following sequence:
* *
<0000>
#
<0000>
#
<0000>
#
12.3.1
ISO2 without channel
information
DIP1 DIP2 DIP3
ON OFF ON
After the user code is entered by
pressing the star key * the code is sent:
the LR red LED will turn on for a second
and the buzzer sounds.
The character string transmitted is: START, CHANNEL, SEP,
CODE (maximum 14 characters), SEP, END, LRC.
12.3.2
ISO2 with channel information
DIP1 DIP2 DIP3
ON OFF ON
The correct code must be followed by
the star key *: the LV green LED
activates and the buzzer emits a
confirmation tone.
By pressing one of the function keys 1/A, 4/B, 7/C, */D the
sequence of characters is transmitted. Within 5 seconds,
you have the option to activate another function, which
