Siemens SINAMICS S120 Equipment Manual page 281

Preparatory steps
● Disconnect the drive line-up from the power supply
● Allow unimpeded access to the power block
● Remove the protective cover.
Removal
The removal steps are numbered in accordance with the figure.
1. Unscrew the connection to the DC link (8 screws).
2. Unscrew the connection to the line connection (8 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-in connections for the signal cables (2 plugs).
8. Disconnect the plug for the thermocouple.
9. Unscrew the two retaining screws for the fan and attach the equipment for assembling
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-in connections and then ensure that they are secure.
The screw connections for the protective covers must only be tightened by hand.
Chassis power units
Manual, (GH3), 10/2008, 6SL3097-2AE00-0BP3
pull out the Control Interface Board.
the power block at this position.
Maintenance and Servicing
8.4 Replacing components
281