Quote Originally Posted by n0f8r View Post
Bit confused though - shouldn't an opto-isoloated output from the AXBB help avoid grounding issues?
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The problem for me was that my VFD shares the same ground for the 0-10V speed control and the ON/OFF port - joining this ground to the isolated output ground which switches various things on the machine didn't seem to be too clever from the interference point of view and was causing some weirdness. It's just a shame the isolated outputs don't have separate grounds, but I guess there's just not space. That done the AXBB-E seems to work well.