How do I position my Smart-
Wire-DT slaves?
45
02/11 MN05006002Z-EN
Total length of the ribbon cable: 8.2 m
Example of calculation using the formula:
The SmartWire-DT gateway does not supply the contactor
coils with sufficient current in this case. An additional power
feeder module EU5C-SWD-PF1-1 must be inserted after the
contactor with SmartWire-DT slave address 7.
The voltage drop in the device supply is non-critical.
How do I position my
SmartWire-DT slaves?
There are no restrictions to the positioning. However, the
following recommendations should be heeded:
X
Arrange the SmartWire-DT slaves of a device group as far
as possible in groups on the SmartWire-DT network.
X
Fit the external device plug to the ribbon cable with suffi-
cient spacing.
If, for example, the functional elements M22-SWD… or
SmartWire-DT I/O modules are arranged next to each other,
installation of the external device plugs or later replacement
of the SmartWire-DT slaves will be easier.
U
n
= U
n-1
- R
Ln
x (I
n
+ I
RB
)
Result of calculation
Total current in the device supply I
VP
0.469 A
Total current in the contactor supply I
AUX
3.6 A
Voltage drop in the device supply U
VP
0.49 V
Voltage drop in the contactor supply U
AUX
3.77 V
h
A minimum clearance of approx. 30 cm has to be main-
tained between SmartWire-DT network lines and power
cables running in parallel.
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