CandCNC DCP-01, Setup And Installation Manual, Page: 8 / 54

5
V
olts
RV1
R2
Tip
V
olts
Torch
Switch
VR2
Arc
OK[V]
THCSensor
J14
OK
J4
1
TP1
TP2
TP3 TP4
D2
REV14
D21
J15
HIGH VOLTAGE
Electrode
+
Switch
Tip
Torch
L4
J1
1
J5
D6
36
39
CAUTION!
HIGH VOLTAGE
C2
-[NEG]
V
olts
D22
CAUTION!
J1
9 6
DCP
HIGH VOLTAGE
R6
CAUTION!
J3
R8
Arc
37
R7
J16
D13
J17
C1
R1
CandCNC
L1 L2
+[POS] W
orkclamp
ARCOK
J10
T
ORCHRELA
Y
DB9 Cable to
Connector on DTHC
Module
Spark Gap
For HV Systems
FOR CT (Current
Transformer) Input
Only. See page
information
SENSIVITY ADJUST
FOR ARC OK FROM
CT Transformer ONLY
Not used with other
ARC OK methods
TORCH
ACTIVE
ARC OK
ARC OK LED
ACTIVE ONLY
WHEN CT INPUT
is USED.
To TORCH -
(ELECTRODE WIRES)
TO TORCH POS
(WORKCLAMP WIRE)
TP1 - TP2 Test voltage:
When torch fired = approx
1/7th of Raw TIP VOLTS.
(Divide by 7 circuit)
DAMGER
HIGH VOLTAGE
WHEN TORCH
is ON
THC SENSOR CARD
REV 14
Mount card at least ½ ” from any
Metal. Use ½ ” or longer standoffs
above metal case Do not let shell
of DB9 contact metal of
Plasma Case
CONNECTIONS FOR SYSTEMS USING CT TRANSFORMER
CT Transformer is an OPTION and must be ordered separately. It is used on Plasma
Cutters that do not have an available ARC OK (Called other names by different
Plasma manufacturers). The ARC OK provides feedback to the control that a valid
pierce has been made and the arc current is at a level where motion can be released
and the cut begun. The ARC OK is used only when the control has the THC enabled
(Screen button). IT IS REQUIRED for Automated cutting with THC. All CandCNC
THC Sensor cards have had the ability to use an external Current Transformer (CT)
placed in the AC line to the plasma. The CT will only sense AC current so cannot be
used on the DC side of the plasma. A new DC Current Probe (DCP) will be
introduced in 2009 (late summer) that will read and sense the actual DC current at the
WorkClamp lead and the REV14 card has the pads for the connector that will
interface the DCP (Digital Current Probe) through the THC Sensor. To use the DCP
you will have to have a DTHC Module Rev 8 or later. You can trade in older DTHC
modules for the upgrade when you purchase a new DCP module.
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