Welcome to the board.
I have worked with German and Euro equipment for years, and I am curious about a few things:

What is the minimum size allowed for industrial control conductors? Ours (Canada)is 16AWG, and some terminals seem a little small.

On low voltage DC control circuits (24VDC), I have devices that have a blue and a brown wire. Which is positive and which is negative?

I am impressed with your style of schematics, after I learned how to read them, I found them easier to deal with than our ladder logic. The grid/page references to relay contacts are very quick to deal with in a hurry (trouble shooting).

Do you have CAD programs for 'digitizing' our old photocopies of old photocopies?

I am still trying to find a good German/English technical dictionary for millwrights and electricians.