Plasma cutting with servo System in LinuxCNC

Some plasma power supplies provide a 0-10V output to monitor plasma voltage.
If you supply does that, then the THCAD-10 is appropriate

If your plasma power supply does not provide a voltage monitor point,
so all the is accessible is the direct plasma voltage, the THCAD-300 is appropriate

can you give me any supplier of plasma supply to my application? I need buy it.

Ok. I have revised powermax 45 and I think that this is the plasma

Now this plasma has a input to remote run. It is a open contact. I think that it need close to run the plasma. I check touchoff.ngc file and I think that with
M3 S1 you turn on the plama but how you connect the 7i77 for this?Exist any output that can be a switch? Can you explain me a few how connect the hardware? Thanks

Ok, but powermax 45 need a output of relay not a logic output. My question is if exist any manner of obtain a output of switch in 7i77 or I need drive a external relay for this.

what is the signal thats switched?
current and voltage?
AC or DC?

I think that I expressed bad.

The powermax 45 have a input signal for RUN THE PLASMA. this signal is a open contact of two terminals. If you close this contact Turn On the plasma. This action normally is effected with a switch, relay or any mechanical device. Now I want know if this action may be performed with the 7i77 or I need a external relay to join the two terminals of open contact for RUN of plasma.

only way to know is to know what signal is
switched when you close the contact:

current and voltage?
AC or DC?

I don't know. In the data sheet only say:

Signal:
Start (starting plasma)

Type:
Input

Notes:
Normally open.
Open circuit voltage: 18 VDC at terminals START.
Requires contact closure to activate.