Deditec USB-BITP-200 Hardware Dokumentation Seite 171

Step 4
Now connect the second USB OPTION-8 to the PC.
Since the module number is already predefined with "0" in the
delivery state and is thus different from the module number of the
first module
(module number = 1), both modules are configured and ready for
operation.
With Update, both
modules are now
displayed
Software | Seite 171