Concept
Wiegand input configuration refers to a setup where a 3rd party RF reader is connected to a Suprema device and the Suprema device receives a Wiegand signal. This setup may be used in cases where the card type used on site is not supported with the Suprema device. 




Specification
The default Wiegand input range of 2nd generation devices is as follows, following the SIA standard.
Width: 20us ~ 100us
Interval: 200us ~ 20ms (20000us)


CS-40 input range specification is as below:

Width: 10us ~ 120us, 

Interval: 180us ~ 22ms (22000us)



Configuration

Unfortunately you cannot change the Wiegand input pulse width and interval configuration with software. 


The UI in BioStar 2 is misleading because on the device menu's Advanced section, you would see the configuration option as below.

However the Pulse width / interval configuration provided here is only for the output configuration. 

The input configuration is fixed and cannot be changed with the UI.

If you need a the default input range changed, you will have to use another firmware. 


Comparison with V1 

You may ask why a v1 device worked with RF readers with pulse width of 100us and above while 2nd generation devices may require such firmware tweaks. This is because the 1st generation devices did not have a range restriction and 2nd generation devices have this restriction to support multi-wiegand formats.

Additionally if we increase the default range to something like 10us ~ 655340us for all devices, the device performance will decrease around 655 miliseconds so that solution is not preferred. 


Troubleshooting

Countries in Asia may not follow the SIA standard and hence the RF readers manufactured in such countries may have a pulse width above 50 or 100 us. 

In that case the Suprema device will not recognize Wiegand input. 


If you are a end-user, please contact your distributor for support.

If you are a Suprema Authorized Partner, enter a ticket to receive a firmware with altered pulse width and interval value. 

Mention your RF reader's pulse width and interval so we can provide a firmware accordingly.