Slight follow up, if I send a m3s2000 command then I put the multimeter across the 25/12 pins the spindle powers up so the analog is working but it appears neither of the relays in the csmio are switching even though the little leds light. I'm going to try a separate relay with and output from 1-3 ( I'll make sure I supply the 24v to the board for those outputs) and