Replacing The Dc Interface (Option L37) - Siemens SINAMICS S120 Manual

6.4.12

Replacing the DC interface (option L37)

Preparatory steps
● Observe the "five safety rules".
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
● Allow unimpeded access (Motor Module);
Removal
1. Switch off the relevant DC interface in the door.
2. Open the cabinet.
3. Open the fuse switch disconnector and remove the fuse link.
4. Remove the infeed cable to the Motor Module at the contactor.
5. Detach the motor plug or disconnect and insulate the motor cables.
6. Open the cover for the Motor Module.
7. Remove the 24 V DC connector and insulate the contact surfaces so that they cannot be
8. Remove the cable (2 -T1) at the contactor.
9. Remove the screws on the DC rectifier adapter.
10. Remove the connector (-X37).
11. Remove the cable ties on the cable to the DC rectifier adapter.
12. Remove the lower screws (up to 3) on the support plate for the pre-charger.
13. Remove the upper screws (up to 3) on the support plate for the pre-charger.
14. Carefully remove the support plate for the pre-charger and the DC rectifier adapter.
Installation
Installing is the same as removing, however in the reverse order.
Note
Use new cable ties to secure the cable to the DC rectifier adapter.
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A
(if no Control Unit is present, the plate can simply be unscrewed and turned to one side).
touched.
CAUTION
The pre-charger is only secured by the upper and lower screws, which means that it
must be supported when you remove the final screws.
Maintenance and servicing
6.4 Replacing components
307