On the PG3AMOD+ what is the USB connection used for? If I install the PG3AMOD in a TLA mainframe+ do I need to use it?

On the PG3AMOD+ what is the USB connection used for? If I install the PG3AMOD in a TLA mainframe+ do I need to use it?

The USB connection is always necessary. Control of the PG3A is always through the USB port. When the module is installed in a TLA mainframe, it still needs USB because it does not get any data from the TLA backplane.