CandCNC
Page 14
RAV-02 Raw Arc Volts CARD
IF YOU HAVE AN INTERNAL ARC OK SIGNAL:
Connect one wire to Terminal 4 and Terminal 3
above (left two terminals)
IF YOU DO NOT HAVE AN INTERNAL ARC OK
SIGNAL: You will need to purchase a DCP-01
Digital Current Probe.
TORCH SWITCH Terminals.
If you have a plasma unit with a Machine Torch you
will need to locate the two torch fire connection
points. in some units it is called START. IT is a
REMOTE Fire set of wires.
IF YOU HAVE A HAND TORCH you will need to
identify the two Torch Switch wires that come from
the Hand torch and
IMPORTANT: When making any connection inside
the Plasma Unit, disconnect the unit from the AC
Line (unplug it). Do not open the case with power
on the AC line. THERE ARE DANGEROUS
VOLTAGES present in the unit anytime it is
connected to an AC source EVEN IF IT IS
TURNED OFF.
The RAV-02 can be used several ways so it can get confusing about making the connections.
The primary use of the RAV-02 is to take Raw Arc Volts (undivided volts and divide it by a
precise ratio so it can be used by the THC SENSOR PWM module to generate a digital signal
to send volts data to the DTHCII Digital Torch Height Module. In some circumstances that is all
that you will use the card for. Examples are on the Hypertherm 1000/1250/1650 series and the
Older Thermal Dynamics “A” series. Both types have a rear CPC connector (14 pin) that has
the Torch Fire and ARC OK signals available and are used with the CandCNC MIC-02 interface
cable so ONLY the Shielded Analog Cable (SAC-01) is used between the RAV-01 and THC
SENSOR PWM.
On other types of Plasma cutters that have no external connectors for ANY of the required
signals the RAV-01 can become a connection board for accessing those signals internally and
passing them to the THC SENSOR PWM Module via the CCAS-01 4 wire cable. The following
pages will cover how to first use the RAV-02 as a voltage divider card in a unit that does not
have an integrated voltage divider. If you have a plasma unit with no external connectors than
the next section shows how to use the RAV-02 to fire the torch from the software. Finally if
your plasma has an internal access to the Torch fire for a mechanical torch and an internal ARC
OK (OK to MOVE). REMEMBER: the RAV-02 is just a pass-through (place to make
connections) for ARC OK and TORCH FIRE. It does not sense or provide those signals.
There are added pages on some Plasma Cutters and how to connect them; sometimes there is
more than one way. If there is a way to access the proper signals externally than that method
with a cable is recommended. In each case the objective is to get the signals in and out of the
THC SENSOR PWM Module.
RAV-02 PREFACE: General Information
CONNECTING to YOUR PLASMA
RAV-02 Raw Arc Voltage Divider Option
E
Module
Later version RAV-02
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