Is the ADAT/TDIF Extension Card for the UnitY available for purchase separately, as my UnitY card just has a blank panel?
Both the UnitY card and the optional ADAT/TDIF extension has been discontinued and they are no longer available.
If you can get hold of one, the blankpanel just needs to be replaced with the ADAT/TDIF extension and you are up and running. Afterwards you just need to select the right I/O configuration (ADAT or TDIF). Please refer to page 35 of the TC UnitY user manual.