Note:
The cover on the machine interface receptacle pre-
vents dust and moisture from damaging the recepta-
cle when not in use. This cover should be replaced if
damaged or lost.
Installation of the machine interface cable must be
performed by a qualified service technician. To install
a machine interface cable:
1. Turn OFF the power and disconnect the power cord.
2. Remove the machine interface receptacle’s cover
from the rear of the power supply.
3. Connect the machine interface cable to the pow-
er supply.
Torch
Switch
Signal
Pilot Arc Signal
Arc
Signal
Refer to the following table when connecting the CUT
system to a torch height controller or CNC controller
with a machine interface cable.
Signal
Type
Instruction
The connector
socket
Cable ends
Start
(start plasma)
Input
Normally open.
18 VDC open circuit voltage at
START terminals.
Requires dry contact closure to
activate.
8 - 9
8 (yellow)
9 (green)
Transfer
(start machine
motion)
Output
Normally open. Dry contact
closure when the arctransfers.
120 VAC/1 A maximum at the
machine interface relayor
switching device (supplied by
the customer).
13 - 14
13 (blue)
14 (white)
Ground
Ground
Voltage divider
Output
CUT: Divided arc signal of
20:1,30:1, 40:1, 50:1 (provides a
maximum of 18 V).
6(+) 7(-)
6 (red)
7 (black)
6.2.5. CNC Socket Diagram
The CUT power supplies are equipped with an op-
tional, factory installed, four position voltage divider
that is designed to be safely connected without tools.
The built in voltage divider provides a scaled down
arc voltage of 20:1, 30:1, 40:1, and 50:1 (maximum
output of 18 V). An optional receptacle on the rear of
the power supply provides access to the scaled down
arc voltage and signals for arc transfer and plasma
start.
Note:
The factory presets the voltage divider to 20:1. To
change the voltage divider to a different setting, refer
to the section on the next page.
The factory installed internal voltage divider pro-
vides a maximum of 18V under opencircuit condi-
tions. This is an impedance protected functional
extra low voltage (ELV)output to prevent shock,
energy, and fire under normal conditions at the
machineinterface receptacle and under single
fault conditions with the machine interfacewir-
ing. The voltage divider is not fault tolerant and
ELV outputs do not comply withsafety extra low
voltage (SELV) requirements for direct connection
to computerproducts.
1.995.232 EN - Rev. 1.1
NOVACUT 106 LCD
25