All of the Powermax45's come equipped with a CPC port. On the Powermax65 it is optional at the time of purchase, but can be added at any time (order part number 228696 from a Hypertherm dealer).
The CPC port on a Powermax65 (or 85) has the plasma start input (active only with machine torch plugged into power supply), has the arc transferred output (also know as "arc good", "ok to move", "machine motion"....depending on the device you are interfacing) and it has a voltage divider output (factory set at 1/50th of arc voltage, can be reset to 1/21.1, 1/20, 1/25 or 1/40 of arc voltage by setting a dip switch inside unit)
Internal connections for a cnc machine interface would require reading the schematic and cutting and splicing wires....I would not recommend doing it this way for safety and warranty issues.
Jim Colt Hypertherm