Siemens SINAMICS S120 Device Manual page 278

Maintenance and servicing
6.4 Replacing components
Installation steps
Installation is performed the same as removal, but in the reverse order.
Note
Specifications for the installation
The tightening torques specified in the "Tightening torques for screw connections" table must
be observed.
Carefully insert the plug-in connections and ensure that they are secure.
The fiber optic cable connectors must be re-installed at their original slot. The fiber optic
cables and sockets are labeled accordingly (U11, U21, U31) for correct assignment.
The procedure described here for replacing the power block refers to the module on the
right. The other modules are handled in the same way.
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Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A