How do I dimension the power
supply of my SmartWire-DT
topology?
35
02/11 MN05006002Z-EN
Contactor supply U
AUX
The 24 V DC supply voltage for contactor actuation is also
supplied through the 8 core ribbon cable (
tion of the SmartWire-DT flat band conductor“, page 26).
Calculation of the electrical load in the contactor
supply
If the SmartWire-DT modules DIL-SWD-32-… are combined
with contactors that on account of the type or quantity cause
a total wattage/total current consumption > 72 W/3 A, a
power feeder module EU5C-SWD-PF1-1, EU5C-SWD-PF2-1
or a switch cabinet bushing has to be inserted before the
SmartWire-DT slave as of which the 3 A have been
exceeded.
The total current I
G
is is the sum of the contactors‘ individual
current consumption values weighted with utilization factor
k.
Please refer to the manual MN05006001Z-EN, „SmartWire-
DT Slaves“ for the current consumption of the various
contactors.
I
G
= k x (I
1
+ I
2
+ … + I
n
)
h
The current load is calculated automatically by the design
software.
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