Hypertherm Powermax45 Conditions De Service page 4

Interface cable replacement
About the Powermax45 voltage divider
The Powermax45 is equipped with a factory-installed voltage divider that is designed to be safely connected without
tools. The built-in voltage divider provides a 50:1 arc voltage. A receptacle on the rear of the power supply provides
access to the 50:1 arc voltage and signals for arc transfer and plasma start.
CAUTION: The factory-installed internal voltage divider provides a maximum of 7 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.
About the Powermax65/85 voltage divider
The Powermax65 and Powermax85 power supplies are equipped with an optional, factory-installed, five-position
voltage divider that is designed to be safely connected without tools. The built-in voltage divider provides a scaled down
arc voltage of 20:1, 21.1:1, 30:1, 40:1, and 50:1 (maximum output of 18 V). An optional receptacle on the rear of the
power supply provides access to the scaled down arc voltage and signals for arc transfer and plasma start.
Note: The factory presets the voltage divider to 50:1. To change the voltage divider to a different setting, refer to the
section on the next page.
CAUTION: The factory-installed internal voltage divider provides a maximum of 18 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.
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Field Service Bulletin