Additional Information
8.2 Cooling Systems
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
8-5
8.2.4 Cold Plate
Cold plate cooling is a cooling system for SINAMICS S120 booksize power units. The flat
aluminum cooling plate located at the rear side of the devices serves as thermal interface.
Special advantages of the cold plate technology
1. It is particularly suitable for machine concepts in which a high level of dirt accumulates in
the machine vicinity. The reduction of the cabinet-internal heat loss simplifies the heat
dissipation of a sealed control cabinet (IP54).
2. Advantageous for machine concepts for which liquid is already present in the process.
This heat dissipation method is thus suitable for both internal and external cold plate
cooling of the power components.
A distinction is made between:
● Cold plate with an external air heat sink
The components of the drive group are typically all attached with screws to the cooling
fins of an air heat sink located outside the control cabinet.
● Cold plate with an external liquid heat sink
The components of the drive group are typically all attached with screws to the liquid heat
sink located outside the control cabinet.
● Cold plate with internal liquid heat sink
This is considered to be a liquid cooling using a connection adapter. The liquid passes
through the integrated channels in the cold plate.
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