USER MANUAL
INSTALLATION
1. Mount the Neuron.THC into the CNC box.
2. Connect Home and Initial Height Sensing (Float Head and/or Ohmic Sensor) switches to
screw terminals on the Control Module.
3. Connect the Neuron.THC Control Module to the RJ45 (Cat5e) Ethernet connector on the PC
or Ethernet switch (0.5 m minimal cable length).
4. Connect the plasma system interface PCB to the RJ45 (CAT5) connector on the Control
Module.
5. Connect the Torch Lifter motor driver to Pulse/Direction RJ45 connector (using adapter) on
the Control Module.
6. Connect the power supply (DC 12 volt / 0.8A) to screw terminals on the Control Module.
NOTE: All interconnection RJ45 cat5e cable has the PIN TO PIN connection.
Recommended grounding and shielding practices
Introduction
This part is describing the grounding and shielding necessary to protect a plasma cutting system
installation against radio frequency interference (RFI) and electromagnetic interference (EMI)
noise. It addresses the three grounding systems described below.
Note: These procedures and practices are not known to succeed in every
case to eliminate RFI/EMI noise issues. The practices listed here have been
used on many installations with excellent results, and we recommend that
these practices be a routine part of the installation process. The actual
methods used to implement these practices may vary from system to
system, but should remain as consistent as possible.
Types of grounding
1. The safety, protective earth (PE), or service ground. This is the grounding system that
applies to the incoming line voltage. It prevents a shock hazard to any personnel from any
of the equipment, or the work table. It includes the service ground coming into the plasma
system and other systems such as the CNC controller and the motor drivers, as well as the
supplemental ground rod connected to the work table. In the plasma circuits, the ground
is carried from the plasma system chassis to the chassis of each separate console through
the interconnecting cables.
2. The DC power or cutting current ground. This is the grounding system that completes the
path of the cutting current from the torch back to the plasma system. It requires that the
positive lead from the plasma system be firmly connected to the work table ground bus
with a properly sized cable. It also requires that the slats, on which the workpiece rests,
make good contact with the table and the workpiece.
3. RFI and EMI grounding and shielding. This is the grounding system that limits the amount
of electrical “noise” emitted by the plasma and motor drive systems. It also limits the
amount of noise that is received by the CNC and other control and measurement circuits.
This grounding/shielding process is the main target of this document.
Steps to take
1. All motor and drive related leads need full shielding and twisted pair connectors. The
shields should all be connected back to a star ground point at the driven ground rod.
2. Torch leads need to be shielded (outer cover with braided metal shield) that should be
grounded only at the high frequency generator end.....back to the star ground point. The
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