Siemens SINAMICS S120 Manual page 287

Caution when removing
The power block weighs approx. 66 kg!
When removing the power block, ensure that you do not damage any signal cables.
The second plug connection for the fiber optic cables cannot be disconnected until the
power block has been pulled out slightly (see Step 7).
Installation steps
Installing is the same as removing, however in the reverse order.
NOTICE
Specifications for installation
The tightening torques specified in the table "Tightening torques for screw connections"
must be observed.
Carefully insert the plug connections and 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).
Cabinet Modules
Manual, 03/2013, A5E03263538A
CAUTION
Maintenance and servicing
6.4 Replacing components
285