Hypertherm Powermax125 Service Manua - Manual (Page 181)

Powermax125 Service Manual 808070 181
9 – Power Supply Component Replacement
Set the voltage divider board
The factory presets the voltage divider to 50:1.
1. To change the voltage divider to a different setting:
a. Locate the voltage divider DIP switches on the left side of the power supply. Figure 50 shows the default setting
(50:1) with the number 4 switch up.
Figure 50
b. Set the DIP switches to one of the settings shown in Figure 51.
Figure 51
CAUTION!
The factory-installed internal voltage divider provides a maximum of 16 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.
20:1 21.1:1 30:1 40:1 50:1