Power
Plasma
Supply
CNC
Interface
Signal Name
Color
End (1X6)
End
End
Function
Hold –
Black
5
Not
J4-6
(Optional)
Hold Ignition (I/O) signal used for preflow
Hold +
White
1
Connected
J4-5
during IHS. Also used by power unit to synchronize
Drain
Drain
10
operation of multiple torch installations. Output signal
Plasma Start –
Black
9
Not
J4-4
Plasma Start signal maintained during plasma cut. If
Plasma Start +
Blue
15
Connected
J4-3
signal is lost, system must be restarted. Output signal.
Drain
Drain
14
Arc Transfer –
Black
31
Not
J3-2
Arc Transfer signal. Contact closes after arc transfer
Arc Tr
Red
36
Connected
J3-1
and pierce delay (set on power supply front panel).
Drain
Drain
25
Dry contact closure. Input signal.
Emergency Stop
Black
28
28
Not
Emergency Stop
Green
33
33
Connected
Drain
Drain
27
27
Arc Voltage
Black
32
32
Not
These signals connect to the CNC. Refer to HT4001
Arc Voltage
Yellow
37
37
Connected
Instruction manual for signal information.
Drain
Drain
26
26
Spare
Black
16
16
Not
Spare
Green
17
17
Connected
Drain
Drain
18
18
HT4001 SETUP
3d-6
CommandTHC for X-Y Table
Instruction Manual
7
Figure 3d-3 HT4001 interface cable – part number and signal list
Part number
Description
Length
123330
HT4001 Power Supply Interface Cable
6 ft./1.8 m
Shaded area indicates plasma interface assembly connections.
Plasma interface assembly other J3 and J4 connection points:
• J3-5 (+) and J3-6 (–) – Alternate Nozzle Contact. An optically isolated signal that indicates nozzle is in ohmic contact with work.
Ohmic contact is represented by a logic 1.
• J3-7 through J3-12 – Reserved for future use.
• J3-13 and J3-14 – Protective earth ground.
• J4-1 (+) and J4-2 (–) – Available 24 VDC, 500 mA maximum
• J4-7 and J4-8 – Pierce Complete signal used by power unit to time transition from pierce gas flow to cut gas flow. User enters this
time delay into THC. Output signal.
• J4-9 through J4-14 – Reserved for future use.
