Replacing Power Units - Siemens SINAMICS S120 Equipment Manual

Maintenance and servicing
6.4 Replacing components
6.4.5

Replacing power units

The components required for connecting the DC busbars to the power unit are supplied as
standard. If a components is replaced, you may have to restore these connections. The
connection procedure is described in the following section.
Preparatory steps:
● Observe the "five safety rules".
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
● The cabinet units must be installed and secured properly.
● Allow unimpeded access to the DC busbars
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(if necessary, remove the protective covers).
Figure 6-3 Connection to the DC busbar on the Basic Line Module, Smart Line Module, Active
Line Module, Motor Module (chassis format)
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A