Hello, I am looking for the electrical plans for the “Multiplus 24 | 3000 | 70 - 50 | 230/240V” cards because there is a relay that goes to ground.
I dont think the electronic schematics exist in the public domain. In any event the cards are extremely difficult to de-solder from the motherboard which is very thick copper.
You’re not thinking about the earth relay which links neutral and earth?