Wow, wish I had known about these months ago! Thanks heaps for the info. I'm currently using the masso differential receiver module, do these boards provide the same function?
I've got pin 5 hooked up to the inputs, what kind of problems would I be seeing with a ground loop? Iv'e had a few of the drives fault out and even the controller restart for no apparent reason. Thought it could be power fluctuations but also sounds like it could be ground loop issues.