Hello.
I have got a CNC mill from 1997 used at auction, but I'm stuck on a basic startup error.
I get the " Relay ext. DC Voltage Missing " error, although the e-stop is not pressed, air is 6bar+, oil level is good, no limit switches are physically triggered, etc.

I have only found one PSU here: the big black/green box in the pictures. Shouldn't there be two 24v power supplies?

Also, how can i start to diagnose problems in this controller? i have had trouble finding any electrical diagrams online for the controller.

Would it be a good idea to start looking into the orange safety relay, and try to figure out if something is triggering it? How can i approach this route if viable?

Or, about the controller connections, where can i check for a missing voltage?

I have seen threads similar to this on the forums, but i have failed to find a solution although i've tried most of the things listed.