■
If you are installing a voltage divider PCB, mount it as closely as possible to where the arc voltage is
sampled. One recommended location is inside the plasma power supply enclosure. If a Hypertherm
voltage divider PCB is used, the output signal is isolated from all other circuits. The processed signal
should be run in twisted shielded cable (Belden
®
1800F or equivalent). Use a cable with a braided
shield, not a foil shield. Connect the shield to the chassis of the plasma cutting system and leave it
unconnected at the other end.
■
All other signals (analog, digital, serial, and encoder) should run in twisted pairs inside a shielded
cable. Connectors on these cables should have a metal housing. The shield, not the drain, should be
connected to the metal housing of the connector at each end of the cable. Never run the shield or the
drain through the connector on any of the pins.
Figure 9 - Plasma cutting system components connected to a cutting table ground bus
1 Gantry ground bus
2 Ground rod
3 Plasma cutting system work cable (+)
4 Gas connect console
5 CNC enclosure
6 Torch holder
7 Plasma cutting system chassis
8 TorchConnect console
Cooler, if applicable (not shown)
The following picture shows an example of a gantry ground bus. It is bolted to the gantry, close to the
motor. All of the individual ground cables from the components mounted on the gantry connect to the bus.
A single heavy cable then connects the gantry ground bus to the table ground bus.
Qualifications and Requirements
2
75811530Instruction ManualXPR460
To Next Page
Loading...
