You do not need PlasmaC for Proma SD, it has it's own THC control, it has to be wired differently, the step and dir wires must go to Proma SD and from there to the Z axis drive.
You can use PlasmaC only for probing, nothing else will work with that.
See if you can replace it with a THC150
www.proma-elektronika.com/compact-thc-150/
That one works with PlasmaC
