Power repeater / power supply according to IEC 61158-2
FOUNDATION FieldbusPower supply, connections and operating
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
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7.2
Connection of power repeaters to the power rail
The following illustration shows the interconnection of power repeaters/power sup-
plies with a power feed module through the power rail:
Figure 7.5: Bus signal via power rail
In this example, the power feed module supplies power to 4 power repeaters. The
power feed module is connected as the only device with a power supply.
In addition, only power repeater 1 is connected with the field bus on the host side. This
applies the signal to the power rail. Power repeaters 2 to 4 receive the data signal
from there. For the terminal assignment for the different versions, please refer to
The bus signal can also be optionally attached to power feed module terminals 13+
and 15-.
7.3
Segmentation
If segmentation is required because of too much current consumption from the power
rail, the interconnection of the individual segments may appear as follows.
Figure 7.6: Segmentation of power rail segments with redundant power supply
If segmentation is performed in the manner described above, power feed components
with the extension .B (for example KFD2-EB-D2A.B) should be used. Only these ca-
bles have the necessary bus pick-up.
IEC 61158-2 host side
Power repeater
1
Power repeater
2
Power repeater
3
IEC 61158-2 field side
to power supply
Power repeater
4
feed
er
Po
w
e
r
K
F
D2-E
B
...
to power ...
Part 1
to power ...
Part 1
to power ...
Part 2
to power ...
Part 2
13+
15-
