SIPLUS PSU (6DL3500-8BA)
SIPLUS PSU Power Supply Unit
A5E00854207E
23 of 30
Copyright (C) Siemens AG 2018
V 8.00 released
2018-05-03
7.2 Earthed Mounting
The connection of the reference potential of the DC 24 V supply voltage (M) to the cabinet ground is
carried out via a screw M5 x 20-8.8 and a contact bushing inside of the housing (earthed mounting
see figure 16: m-connection with the case). The connection is factory made in the delivering state.
Figure 16: M-connection with the case
X101
X102
X103
X104
X105
X106
X107
X108
X109
L1
L2
M
L1/L2
X1 ..
X21
Figure 17: earthed mounting
Figure 18: unearthed mounting
To reconnect an undone connection, open the housing cover situated on the left above the feeding
clamps. Insert the contact bushing marked in figure 16 between M bus bar and case lug and fasten it.
Tighten the screw with a torque of 6 N m to get a low impedance electrical connection between M bus
bar and case.
7.3 Unearthed Mounting
For a mounting isolated from earth (e.g. in plants with a central earthing point) the SIPLUS PSU of-
fers the possibility to undo the connection of the reference potential of the DC 24 V supply voltage to
the cabinet earth.
Open the case cover situated on the left above the feeding clamps. Loosen the screw marked in fig-
ure 16 and remove screw and contact bushing.
7.4 Inactivating of unused supply outputs
To indicate unused branches, the channel LEDs can be turned dark. In this way the used branches
can be visually distinguished of the unused easily.
Pull the corresponding fuse link out of the socket and put the channel switch in the “OFF” position.
The channel is in the operating state "INACTIVE" now.
