The AXBB-E is on it's way, I have a licence code for UCCNC and have been reading the manuals. I'm currently using 12V for the proximity sensors for the simple reason that I'm using a standard PC power supply (5V and 12V with plenty of current available) for the controller.

24V is obviously better to help avoid interference but the AXBB-E manual doesn't give a current rating for that supply, possibly because it depends on the external equipment connected. What rating of 24V supply do other people use on these cards? I'm using the standard eBay proximity sensors and Huan Yang VFD with nothing else unusual included. I've been looking at small 2A units as there isn't a lot of spare room in the box. I'll still need the PC PSU in there for the 5V supply and 12V for the cooling fans and dust extractor relay.

Kit