I've got a herocut 60i cnc plasma cutter and it has a 1:1 arc voltage port on the back. For safety reasons I would rather divide that to 50:1 and then send it to my Proma SD THC.



Attachment 443606


Works out to 50K across the ~110V arc voltage so puts the current at 2.2ma so I should be able to use 1/4 watt resistors without any issue. Anyone have a suggestion for adding anything else to the circuit. I've googled and searched the forums and haven't come up with any schematics so maybe it is just this simple.

Thanks,
Brendin