Additional Information
8.2 Cooling Systems
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
8-3
8.2 8.2 Cooling Systems
8.2.1 Introduction
For the SINAMICS System S120, three cooling systems are differentiated:
● Internal air cooling
● External air cooling
● Cold plate cooling
8.2.2 Internal Air Cooling
All SINAMICS S120 booksize components are installed within a control cabinet. The total
heat loss of all components is dissipated in the control cabinet. There are three ways to
remove the heat from the control cabinet:
● Filter fan
● Heat exchanger
● Cooling unit
The device to be used depends on the associated environmental conditions and the required
cooling capacity. The configuring must also maintain the specified clearances for the
ventilation. No other components may be placed in these areas.
8.2.3 External Air Cooling
The external air cooling is a cooling system for SINAMICS booksize power units. The
through-hole technology is used for this construction form. The booksize power unit with its
heat sink can be placed in the rectangular cutout of the control cabinet rear wall and installed
with a seal. The heat sink with its cooling fins and fan (contained in scope of delivery)
extends at the back out of the control cabinet and the heat dissipation is made externally
from the control cabinet or in a separate air duct.
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