power automation PA 8000 LW Series, Installation Instructions Manual, Page: 98 / 132

5.3.3 Setting up RMS supply voltage drop compensa-
tion
The distance between the measuring systems and the power supply
can be relatively long. The ohmic resistance of the power supply cable
and the RMS' current consumption generate a voltage drop.
Fig. 61: Schematic encoder power supply voltage drop
1 Power supply
2 Rotating measurement system (RMS)
U
A
Supply output voltage
U
1
Voltage drop
U
2
Voltage at the RMS
U
3
Voltage drop
As shown in the figure, the voltage U
2
equals the difference between
the output voltage U
A
and the voltage drop U
1
+U
3
.
Adjusted voltage U
2
= U
A
- (U
1
+ U
3
)
Precondition
PA 8000 LW CNC control unit
Installation
25.09.2015 | 98