Hypertherm Powermax105 Service Manual - Manual (Page 129)

Mechanized cutting
powermax
105 Service Manual 7-3
Connecting an optional machine interface cable
The Powermax power supply may be equipped with a factory-installed (or user-installed) five-position voltage divider
board. The built-in voltage divider provides a scaled down arc voltage of 20:1, 21.1:1, 30:1, 40:1, or 50:1 (maximum
output of 15 V). An optional receptacle on the rear of the power supply (see the previous page) 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
page 7-6 Setting the five-position voltage divider.
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.
Hypertherm offers several choices of machine interface cables for the Powermax105:
• To use the built-in voltage divider that provides a scaled down arc voltage in addition to signals for arc transfer
and plasma start:
- Use part number 228350 (7.6 m, 25 feet) or 228351 (15.2 m, 50 feet) for wires terminated with spade
connectors.
- Use part number 123896 (15.2 m, 50 feet) for a cable terminated with a D-sub connector. (Compatible
with Hypertherm products, such as Edge ® Ti and Sensor ™ PHC.)
• To use signals for arc transfer and plasma start only, use either part number 023206 (7.6 m, 25 feet) or part
number 023279 (15.2 m, 50 feet). These cables have spade connectors as shown below.
Refer to page 7-5 Machine interface pinout for receptacle pinout information.