Hypertherm Powermax 65, Руководство по обслуживанию

Страница: 65 / 248

Torch SeTup
powermax
65/85 Service Manual 3-17
Connecting an optional machine interface cable
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
3-20 Setting the five‑position voltage divider .
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.
Hypertherm offers several choices of machine interface cables for the Powermax65 and Powermax85:
• 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 ft) or 228351 (15 m, 50 ft) for wires terminated with spade
connectors.
- Use part number 123896 (15 m, 50 ft) for a cable terminated with a D-sub connector. (Compatible with
Hypertherm’s Edge Ti and Sensor PHC products.)
• To use signals for arc transfer and plasma start only, use either part number 023206 (7.6 m, 25 ft) or part
number 023279 (15 m, 50 ft). These cables have spade connectors as shown below.