Calculating with a graph
Proceed as follows:
1. Calculate the maximum current consumption
of the output/valves (I
2
).
2. Calculate the lowest voltage (V
Omin
) to be ex-
pected on the power unit during operation.
Take into consideration:
• the load dependency on the power unit
• the fluctuations in the primary power
voltage.
3. Read in the table for your cross section the
cable length.
Example for 1.5 mm
2
:
V
Omin
= 22.8 V, I
2
= 2 A; L
max
= 25 m
VIFB6- 03/05 Appendix A
9809c A-7
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