Siemens SINAMICS S120 Manual page 272

Maintenance and servicing
6.4 Replacing components
Preparatory steps
● Disconnect the drive line-up from the power supply so that it is in a no-voltage condition.
● Allow unimpeded access.
● Remove the front cover
Removal steps
The removal steps are numbered in accordance with the figure.
1. Disconnect the plug-in connections for the fiber optic cables and signal cables
2. Remove the DRIVE-CLiQ cables and connections on -X41 / -X42 / -X46 (6 plugs).
3. Take out the retaining screws for the IPD card (2 screws) and remove the IPD card from
4. Remove the retaining screws for the Control Interface Module (2 screws).
When removing the Control Interface Module, you have to disconnect 5 further plugs one
after the other (2 at the top, 3 below).
CAUTION
When withdrawing it, ensure that you do not damage any signal cables.
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).
Note
It is only possible to connect identical power units in parallel if both power units have the
same hardware version. Mixed operation between a power unit with Control Interface
Module and a power unit with Control Interface Board is not possible.
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(5 connectors).
plug -X45 on the Control Interface Module.
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A