Siemens SINAMICS S120 Manual page 257

Preparatory steps
● Observe the "five safety rules".
● Disconnect the cabinet from the power supply (do not forget the external power supplies).
● Remove the protective cover.
● Allow unimpeded access to the power block.
● Set up the installation device for the power block and keep it at hand (see the section
Removal steps
The removal steps are numbered in accordance with the figure.
1. Unscrew the connection to the line or to the motor (3 screws).
2. Unscrew the connection to the DC link (4 screws).
3. Remove the retaining screws at the top (2 screws).
4. Remove the retaining screws at the bottom (2 screws).
5. Remove the DRIVE-CLiQ cables and connections on -X41 / -X42 / -X46 (6 plugs).
6. Take out the retaining screws for the IPD card (2 screws) and remove the IPD card from
7. Remove the mounts for the Control Interface Module (2 nuts) and carefully pull out the
8. Disconnect the plug-in connections for the fiber optic cables and signal cables
9. Disconnect the plug for the thermocouple.
10. Unscrew the 2 retaining screws for the fan and attach the tool for de-installing the power
You can now remove the power block.
Up to 1200 V may still be present on the DC busbars even after the DC interface (option
L37) has been switched off. For this reason, take particular care to avoid coming into
contact with the DC busbar when replacing a power block!
CAUTION
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).
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A
titled "Installation device for power blocks").
plug -X45 on the Control Interface Module.
Control Interface Module.
When removing the Control Interface Module, you have to disconnect 5 further plugs one
after the other (2 at the top, 3 below).
(5 connectors).
block at this position.
DANGER
Maintenance and servicing
6.4 Replacing components
257