aleksamc wrote: To what output diod I need to connect THCAD inputs?
Does it should be E18 - E19 (page 2)?
Do add a resistor or fuse to each wire.
Small resistors should do just fine, they do not impact the voltage readings much and they will burn easily if there is a short in the wires, so mount them at least 3cm far from everything in mid air.
3A is to much, anything from 100mA to 1A is better for safety.
aleksamc wrote: Thank for advice tommylight. I think 3A will be anough.
And if they will burn, how system will behave? Does all will turn off with error?
they will burn only if the wires going to THCAD come it touch with the metal machine frame or some other mishap.
System will not shut down, it just will not show torch voltage in case those fuses or resistors are blown.