Festo IFB11-03, Electronic Manual

Page: 151 / 214

A. Technical appendix
A−7
Festo P.BE−VIFB11−03−EN en 0503g
Calculating with the graph
Proceed as follows:
1. Calculate the maximum current consumption of the out
puts/valves (I
2
).
2. Calculate the lowest voltage to be expected during oper
ation (VB
min
) on the power unit. When doing this, please
note:
the load dependency of the power unit
the fluctuations in the primary mains voltage
3. Read off the permitted cable length for your cross−
sectional area in the relevant table.
Example for 1.5 mm
2
:
V
Bmin
= 22.8 V, I
2
= 2 A; L
max
= 25 m