Siemens SINAMICS S120 Equipment Manual page 146

Basic Line Modules with cold plate
6.5 Installation
Properties of the heat sink
AlMgSi 0.5 is recommended as the heat sink material.
The roughness of the external heat sink surface should be at least Rz 16 and the contact
surface between the heat sink and cold plate should have an evenness of 0.2 mm
(applicable to a height of 450 mm and width of 300 mm).
Note
The machine manufacturer can adapt the heat sink version to his special requirements. The
specified rated data for the Power Modules can only be achieved if the power losses can be
dissipated by the external heat sink under the specified general conditions.
NOTICE
When mounting, you must ensure that the threaded bolts do not damage the cold plate.
Remove the holder for securing the Control Unit.
The plastic retaining element must be removed due to the different expansion variants:
● If the component to be installed comes into contact with the left-hand cabinet panel
● using center feed via the Basic Line Module
Use suitable tools to lift the latching device
and push up the holder
146
Remove the holder After the removing the holder
Booksize cold-plate power units
Manual, (GH4), 03.2007, 6SL3097-2AJ00-0BP4