Yes mate 24v DC. Pretty sure the original relays are wired so that only 1 clutch can be on at a time. Could actually be relays CR2 and 3. Not that it really matters if you don't have the original relay setup.
I've also just seen your post on the linuxcnc thread. I didn't get notified about that post for some reason, so I missed it.
My retrofit stopped for a while because I was working away from home. Also waited for 7i29 servo drives for a fair while. I've just started getting into it again recently. Also ended up buying some mesa ethernet cards to experiment with, rather than using the PCI card.
Great to see you also back on your machine as well.
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