Ok that's great, thanks again. I don't think I will use any DI's or DO's at the moment, just to keep it simple. after I've wired the Limits, Probe(s) and E-Stops I will only have one spare DI Port on the AXBB-E so if I understand correctly I could, in the future, wire the 'Fault Output' DO from the Drive over to the spare DI Port somehow, is that right..?