问题：
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?
答案：
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.
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常见问题 ID 62066
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