Siemens SINAMICS G120 Hardware Installation Manual page 63

CAUTION
The connectors of the fiber-optic cables have to be mounted on their original plug-in
position. The fiber-optic cables and the plug sockets are labelled accordingly (U11, U21,
U31).
Carefully re-establish the plug connections and ensure that they are secure.
When dealing with connectors with a lock, make sure that the locking lever is securely
engaged once connected.
The screwed connections for the protective covers must only be tightened by hand.
Power Module PM240
Hardware Installation Manual, 07/2009, A5E00807525B AD
Service and maintenance
5.2 Replacing components
63