Siemens SINAMICS S120 Manual page 258

Maintenance and servicing
6.4 Replacing components
Installation steps
Installing is the same as removing, however in the reverse order.
CAUTION
The tightening torques specified in the table "Tightening torques for connecting current-
conducting parts" must be observed.
Carefully establish the plug connections and then ensure that they are secure.
The fiber optic cable plugs must be remounted at their original slot. Fiber optic cables and
sockets are accordingly labeled for correct assignment (U11, U21, U31).
The screw connections for the protective covers may only be tightened by hand.
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Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A