Here is a connection drawing for a Hypertherm Powermax (equipped with the CPC port and a machine torch.....with the internal voltage divider set at 21.1:1). There are four connections on a Plasmacam, two wires are the plasma start output , the other two are to monitor divided analog arc voltage. Thhis is used to start the motion as well as for height control. Jim Colt Hypertherm
Note: if your Plasma does not have a 21.1 : 1 divided output....you must use the stock interface cable from Plasmacam that has a two resistor voltage divider built in. This cable allows you to connect to the Raw arc voltage....and divides it by the proper ratio. If you wire the raw arc voltage directly to the Plasmacam you will damage the control box. Also....Plasmacam advises against using a high frequency start plasma.