Configure hardware → Lafayette CANTAB USB hardware.
This is a USB device providing 8 inputs and 14 outputs (plus 2 outputs used by the card as a safety relay and not accessible to Whisker).
The Lafayette driver only allows one such device to be used (as of 9 Aug 2009). Whisker autodetects whether one of these devices is present or not.
The only options available are whether to reverse the logic (on/off) states for inputs and/or outputs.
Restart Whisker to apply any changes.