3-14
S
ETUP
Operator Manual
Arc Voltage
If arc voltage is necessary for activating a torch height control, the customer must supply an 18AWG,
single pair, unshielded cable rated for 300V or greater. The arc voltage signal on the machine interface
board can be accessed as follows:
WARNING
SHOCK HAZARD: Always turn off power, unplug cord from wall and wait 5 minutes before
removing any power supply cover. If power supply is directly connected to a line
disconnect switch, place line disconnect switch to OFF position. In the U.S., use a
"lock-out / tag-out" procedure until the service or maintenance work is complete. In other
countries, follow appropriate local or national safety procedures.
1. Disconnect power from Powermax800 - see warning above.
2. Remove the 22 screws that attach Powermax800 cover to the chassis. Remove the cover.
3. Feed cable through strain relief in the rear of Powermax800. See Fig. 3-17.
Figure 3-18 Machine Interface Board Connections for Arc Voltage
Figure 3-17 Feeding Arc Voltage Cable to Machine Interface Board
(208/240/480V power supply shown)
Strain Relief - Feed arc voltage cable
through and route to machine interface
board.
4. Find the machine interface board on the top of the unit near the Powermax800 control board
and connect the arc voltage cable as shown in Fig. 3-18.
START
XFER
ARC
VOLTAGE
J1
1
6
8
Signal:
Type:
Notes:
J1-6
J1-8
ARC VOLTAGE (torch height control)
Output
Full arc voltage. No voltage divider.
300VDC maximum.
(Signal not available on rear panel
connector.)
+VDC
-VDC
3-97
