Siemens SINAMICS S120 Equipment Manual page 243

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 above.
1. Unscrew the connection to the DC link (8 screws).
2. Unscrew the connection to the supply system (9 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 (5 plugs).
6. Remove the mounts for the Control Interface Board (1 screw and 2 nuts) and carefully
7. Disconnect the plug connections for the signal cables (2 plugs).
8. Remove the plug and, if necessary, the cable connection for the thermocouple.
9. Unscrew the two retaining screws for the fan and attach the installation device for the
You can now remove the power block.
CAUTION
When removing the power block, ensure that you do not damage any signal cables.
Installation steps
For installation, carry out the above steps in 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 screw connections for the protective covers must only be tightened finger-tight.
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A
titled "Installation device for power blocks").
pull out the Control Interface Board.
power block at this position.
Maintenance and servicing
6.4 Replacing components
243