Deditec USB-BITP-200 Hardware Dokumentation Seite 168

Step 2
If several USB modules of different DEDITEC USB series are
connected, the corresponding product family must be selected in
this step.
In this example, modules of the RO-USB2 series and USB-OPT /
REL-8 series are connected.
This step is omitted if the connected modules belong to the same
series.
Software | Seite 168