Thank you Snowgoer and Phill. I am combing over all diagrams for setting this up with a Mesa 7i76e and will probably have more questions. I am using the diagram attached for my machine (now using the relays in lieu of the THCAD's). I assume that where the THCAD-10 pins are shown to be wired, is where the enable relay would be placed? I think somewhat similar to islander261 diagram in Phills post. It is going to be a process for me with probably many more questions if I cannot figure it out from all the great forum posts.