You can use the same approach if you ever need to have a mixture of different DXLs that operate at different voltages, but still have control via a SINGLE Controller or U2D2.
Come to think of it, as the U2D2 has only ONE RS-485 connector, and so depending on how you wire all your DXLs together, physically, you may have to splice the DATA+ and DATA- wires also, just to make sure that you do have a true daisy-chain for the CONTROL circuit and as well as for the POWER circuit which happen to merge “mechanically” together at the U2D2 Power Hub, but “electrically” they remain separate, as the VDD line is not connected to the U2D2.
