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Step 5: Disconnecting the auxiliary power supply
Turn the auxiliary power supply unit off and disconnect it from L1/L2 and M. Connect the feeding ca-
ble to M again.
8.4 Repair
Repairs of the SIPLUS PSU are not provided. A defective SIPLUS PSU must be replaced by a new
unit (see subsequent chapter)
8.5 Replace of an Equipment
Risk to be burnt!
The heat sink and housing parts may be highly heated causing risk of injury in
case of touch.
Before touching the metal parts these have to cool down sufficiently.
Arcing!
At separation of an energized conductor from a terminal dangerous arcs may
arise.
Before replacing the equipment the concerned SIPLUS PSU has to be de-
energized.
In case of two cascaded SIPLUS PSU for feeding a neighboring cabinet a power supply fault in the
post-connected cabinet can be prevented when replacing the first SIPLUS PSU (see figure 21). For
that the following procedure is recommended:
F1ext
F2ext
U1
U2
Figure 21: Cascaded SIPLUS PSU
SIPLUS PSU 1
SIPLUS PSU 2 Installed in neighboring cabinet supplied from SIPLUS PSU 1
SIPLUS PSU Power Supply Unit
Copyright (C) Siemens AG 2018
CAUTION
CAUTION
SIPLUS PSU 1
L1
X101
L2
X102
X103
M
X104
X105
X106
X107
X108
Faulty equipment, whose replacement will be described
X1 ..
X21
L1/L2
X109
A5E00854207E
V 8.00 released
SIPLUS PSU (6DL3500-8BA)
SIPLUS PSU 2
L1
X101
L2
X102
X103
M
X104
X105
X106
X107
X108
X1 ..
X21
L1/L2
X109
V
U3
27 of 30
2018-05-03
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