EX-TRAFIRE
®
55SD
Operator Manual, Revision T-3 3-27
System CNC interface connection
Each type of signal is available through the system CNC interface connector located on the rear
control panel� Use the chart with details of each signal type below when connecting the system
interface lead to the plasma arc power supply�
Signal:
START
(start plasma cutting)
Arc transfer
(start system motion)
Ground Voltage divider
Type Input Output Ground Output
Note
Normally open� Open
circuit voltage 12
VDC in the START
terminals� Requires a
dry contact to close it�
Normally open� Dry
contact with maximum
capacity of:
125 VAC / 10 A
250 VAC / 5 A
30 VDC / 5 A
Divider arc voltage signal of:
20:1
21�1:1
30:1
40:1
50:1
(provides a maximum 18V)
Rear socket
connection
3, 4 12, 14 13 6 (+), 5 (-)
Internal wire
colours
white, white yellow, yellow
green/
yellow
6 (red), 5 (black)
Set the DIP switches to one of the following settings� Basic settings is 50:1�
13
12
6
4
5
14
3
Turn OFF the power supply and disconnect the power lead prior opening the enclose�
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