Eaton SmartWire-DT, Manual

Page: 38 / 130

Engineering
34
02/11 MN05006002Z-EN
Calculation of the electrical load in the device supply
The total power consumption of all SmartWire-DT slaves
connected to the SmartWire-DT gateway must not exceed
0.7 A. Otherwise a power feeder module EU5C-SWD-PF2-1
has to be used before the SmartWire-DT slave as of which
the 0.7 A has been exceeded.
X
Add together the currents of all SmartWire-DT slaves and
the current that flows through the network termination,
making a total current I
G
.
h
For the dimensioning of the power supply the following
points have to be taken into account:
• In the device supply (15 V DC):
– The total power consumption ( a “Calculation of the
electrical load in the device supply“, page 35)
– The voltage drop ( a “Voltage Drop“, page 36).
• The following are optional in the contactor supply
(24 V DC):
– The total power consumption
(
a
“Contactor supply UAUX“, page 35)
– The voltage drop (
a
“Voltage Drop“, page 36).
h Please take the total power consumption of your Smart-
Wire-DT topology into account and, if necessary, plan for
(an) additional supply unit(s), e.g. the SmartWire-DT
power feeder module(s) or SmartWire-DT switch cabinet
bushing(s).
I
G
= I
1
+ I
2
+ … + I
n
+ I
RB
h For information about the current consumption of
SmartWire-DT slaves see the appendix of manual
MN05006001Z-EN, “SmartWire-DT Slaves”.
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