SIPLUS PSU (6DL3500-8BA)
SIPLUS PSU Power Supply Unit
A5E00854207E
27 of 30
Copyright (C) Siemens AG 2018
V 8.00 released
2018-05-03
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
CAUTION
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.
CAUTION
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:
X101
X102
X103
X104
X105
X106
X107
X108
X109
L1
L2
M
L1/L2
X1 ..
X21
F1ext
F2ext
SIPLUS PSU 1
U2
U1
X101
X102
X103
X104
X105
X106
X107
X108
X109
L1
L2
M
L1/L2
X1 ..
X21
SIPLUS PSU 2
U3
V
Figure 21: Cascaded SIPLUS PSU
SIPLUS PSU 1
Faulty equipment, whose replacement will be described
SIPLUS PSU 2 Installed in neighboring cabinet supplied from SIPLUS PSU 1