Hi Clive,
Yes, all 5 input pins are triggered in mach 3.
The measurement regarding 26v (right now is 24v) was taken between p13 and the gnd situated right next to p15.
Last week, when I connected the control box to the mains, I.ve cut power via the workshop fuse, and wired everything up, but the earth wire does not go through any breaker, switch, fuse etc, it.s go directly into the mains street pole.
On that particular time, it was raining outside, and when I touched the earth wire, it felt quite unpleasant. Touching it now for example, I do no feel anything. I.m taking about the yellow/green continuation as a single wire of the star ground point.