[Al_The_Man]

Thanks, there's way too many conflicting wiring diagrams for these. It would really help if the manufacturer would include or make available even a little documention.

This is one problem of self built systems put together from all different suppliers, not only do individual item suppliers not know what else is going to be integrated and even the type of machine, but they tend to err on the side of safety and this is the reason that often the recommended approach is to isolate everything, this way it absolves them to a certain degree of their product causing any drastic problems.
Al.