Problem solved. The RJ45 connector on my motor was not working properly. That connector is now history, replaced by four traditional soldering joints.
After that, everything works fine.

Best regards,
Tomas W

Hi, I've just received my new Ultimate Powerbox V2. Everything works just fine, connected to my RPi4, EQ8, QSI683 and Lodestar AG. Sadly I am not so successful in getting my NEMA17 focuser up and going. I'm connecting the stepper motor (NEMA 17HS13-0404S-PG27) to pin 3 to 6 on my UPBv2 motor connect...