Siemens SINAMICS S120 Equipment Manual page 191

Removing the Control Unit
Removing the CU310 from the Power Module 340 (frame size D)
In order to remove the Control Unit from the Power Module, the blue release lever, as shown
in the diagram, must be pressed downwards and the Control Unit swung-out to the front.
Equipment Manual AC Drive
Manual, (GH6), 03/2006 Edition, 6SL3097-2AL00-0BP0
6.2 Control Unit CU310 DP (PROFIBUS)
Control Units
6-19