I wonder if the DSUB 15pin cable between the C7-621 and the extension module (Simatic S7, 6ES7 621-1AD00-6AE3) is a plain straight 1:1 cable or if there's anything special about it?
Want to replace it since I have various problems and the cable bends back and forth every time the hatch opens (display part in lid, the rest in the cabinet).
It's a pretty short cable, less than 0.5m, I'm also guessing it needs to be of limited length.
I haven't found any information at all searching for it.
Hope You can help.