Powermax105 Operator Manual 7-7
Connecting an optional RS485 serial interface cable
The RS485 serial interface connector on the back of the power supply allows you to connect an external device to your
Powermax. For example, you can remotely operate the Powermax with a CNC controller.
The Powermax power supply must be equipped with a factory-installed (or user-installed) RS485 serial interface
connector on the rear panel. The receptacle on the rear of the power supply provides access to the RS485 board inside
the power supply.
If your power supply is not equipped with the RS485 connector, order kit 228539, “Powermax65/85/105 RS485 board
with cables”. Follow the installation instructions in the Power Supply Component Replacement section of the Service
Manual. You can download the Service Manual at www.hypertherm.com (“Downloads library” link).
With the RS485 connector installed:
1. Shut off the power supply.
2. Connect the RS485 cable from your external device to the receptacle on the back of the Powermax power supply.
RS485 Connector
Accessing raw arc voltage
To access divided raw arc voltage, refer to Field Service Bulletin 807060.
WARNING
SHOCK HAZARD, ENERGY HAZARD, AND FIRE HAZARD
Connecting directly to the plasma circuit for access to raw arc voltage increases the risk of shock
hazard, energy hazard, and fire hazard in the event of a single fault. The output voltage and the
output current of the circuit are specified on the data plate.
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