Digi2 Pro external power

Hi.  I have the new Digi2 Pro connected to a Pi3B+ running Volumio.  I have the Digi2 and the Pi powered from a linear PSU connected to the 5v power connector pins on the Digi2 Pro.  Would it be possible to prevent the power passing between the Pi and the Digi2 so that the Pi and the Digi2 could be powered by separate power supplies? This would be to provide cleaner power isolation.

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