Hello I do not write the model because I got the module myself but I hope that the photos will help. I am referring to the zener diode marked DZ1, can anyone check what value it has? In the third picture halfway down.
Well, just that the electrolytes 35V and where 12V for relays. And on the other hand, I do not see any further downgrading at 5V for Prock, though I may be wrong. If someone could measure on a similar voltage on this diode, it would be extra.