Hypertherm Powermax105 Service Manual - Manual (Page 224)

Power SuPPly ComPonent rePlaCement
9-26
powermax
105 Service Manual
Set the voltage divider board
CAUtIoN: the factory-installed internal voltage divider provides a maximum of 15 V under open
circuit conditions. this is an impedance-protected functional extra low voltage (ElV)
output to prevent shock, energy, and fire under normal conditions at the machine
interface receptacle and under single fault conditions with the machine interface
wiring. the voltage divider is not fault tolerant and ElV outputs do not comply with
safety extra low voltage (SElV) requirements for direct connection to computer
products.
The factory presets the voltage divider to 50:1. To change the voltage divider to a different setting:
1. Locate the voltage divider DIP switches on the left side of the power supply.
The figure below shows the default setting (50:1) with the number 4 switch up.
2. Set the DIP switches to one of the following settings.
20:1 21.1:1 30:1 40:1 50:1