Controller board 2.4e

[mikep]

@Tomtomtom

What you seek is here…

Carbide Motion v2.3 Board Layout

What do you want to know? I’m going to repost your image here, just to make this as complete as I can. [3] [26%20PM] “Q2” is not a pin, is the reference designator for the transistor next to that via - I will assume for the time being that via is GND. It appears that the output of this connector is switched (hence the transistor), but I don’t know by what. A3/Coolant would make sense, but I have not verified that. The 2 ISP sockets are just like any arduino “ISP” socket. They look like …