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VIFB13 - 03/05
9809b
Appendix A
Calculating with graphs
Proceed as follows:
1. Calculate the maximum current consumption
of the outputs/valves (I
2. Calculate the lowest voltage to be expected
on the power unit during operation (V
Take into consideration:
• the inluence of load variation of the power
unit
• the fluctuations in the primary mains voltage.
3. Read the permitted length of cable in the
table for the relevant sectional area.
Example for 1.5 mm
V
= 22.8 V, I
Omin
).
2
Omin
2
:
= 2 A; L
= 25 m
2
max
).
A-7
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