Page 8
5.4 WIEGAND interface configuration
The modules
NWGD 46
and
NDEM31
feature a
WIEGAND
input
, which allows to connect
an
external
reader
with
WIEGAND
output
. Setting up the operation mode determines the
function of connected reader (configurable only for the NDEM 31 module, the NWGD 46
uses always the external reader configuration).
If the operating mode is set to
Off
, the external reader is not involved; if set to
Entry
reader
, the identification events raised at the reader have a reason code 255 assigned; if
set to
External
reader
, the internal reader of the module is turned off and the chosen
reasons are assigned to the identification events raised at the external reader.
The module accepts the
WIEGAND
formats mentioned in the
table 4
. If the read signal is
formatted otherwise, the data are not considered as valid and thus ignored. If another
format of data is required to be considered as valid, it is necessary to set up the
User
configuration
of the data read at the WIEGAND input. The table also shows the process
used for individual width of read data.
Acce
p
te
d
f
o
rma
ts
Read data width
Process
Resulting code width
26 bits
Parity bits cut off (in front and at the back)
24 bits
32 bits
Data bytes reversed
32 bits
34 bits
Parity bits cut off (in front and at the back)
32 bits
37 bits
Parity bits cut off (in front and at the back)
35 bits
42 bits
Parity bits cut off (in front and at the back)
40 bits
44 bits
Last 4 bits cut off
40 bits
56 bits
Data bytes reversed
56 bits
Table 4: Accepted formats of read WIEGAND data– standard configuration
To enable user configuration, check the appropriate checkbox. Set the indexes of the
first
and the
last
data bit. If required, choose the
Reverse data bytes
option.
Note: User configuration of
WIEGAND
input
requires a deeper knowledge of the issue;
we recommend leaving the setting to an installation company.
5.5 Input / output 3 function
The
input / output 3 function
can only be configured on modules and in operating modes
when meaningful. If the module does not feature this port or its function is given by
selected operating mode, only the available configuration or determined function is
displayed.
When the
Reader with WIEGAND output
operating mode is selected, the port function is
always
Tamper
(tamper contact). When the
Entry
reader
or
External
reader
operating
mode is selected, the port is always used for
External reader buzzer control
.
In the
Standard
operating
mode
the
Tamper
function is one of available options. Since the
FW version 2.79 the
Reading
synchronization
function driven by
IO port 3
can be selected
on 125 kHz reader modules. The function can be set to
Master
or
Slave
mode.