The voltage input module supplied by langmuir.
Well process your raw voltage so that your torch height controller chip can recognize it without being fried.
The voltage input module takes the raw voltage and uses resistors to divide it to a low enough voltage to be safe for the electronics.
The electronics at this point multiplies that reduced voltage to get the actual voltage to base its decisions off of.
The voltage input module is essentially a 50 to 1 voltage divider or equivalent inside.
The only other way to get your to get your Miller to provide 50 to 1 voltage would be construct your own 50 to 1 voltage divider out of resistors.
(High voltage DC will kill you so at your own risk)
You could also buy and install the factory printed circuit board for the 625 Miller CNC edition which would have a 50 to 1 voltage divider built onto it. (This would be the worst way of going about it)
The voltage input module already does exactly what you’re asking for you do not need any more equipment.