I had a read through the manual as well. I would have liked to see little things like polarities on the analogue outputs and inputs. I don't expect to have to measure this kind of thing before wiring it into a system. This was the wiring manual, I think. I assumed that another doc would talk about configuration in Mach3, port and pin numbering, etc. This is the kind of thing that's obvious to someone who has used the device before but can be a real time-waster first time you meet one. Does look an interesting device, though, and if I weren't building in a CSMIO I might have considered one - plus the extra boards for opto-isolation, etc.