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

6.4.12

Replacing the DC interface (option L37)

Preparatory steps
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
● Allow unimpeded access (Motor Module);
(if no Control Unit is present, the plate can simply be unscrewed and turned to one side).
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
touched.
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.
Note
Secure the pre-charger
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.
14.Carefully remove the support plate for the pre-charger and the DC rectifier adapter.
Installation
Installation is performed the same as removal, but in the reverse order.
Note
Use new cable ties
Use new cable ties to secure the cable to the DC rectifier adapter.
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
Maintenance and servicing
6.4 Replacing components
321