Siemens Sinamics S120 Manual page 29

To carry out the required functions, SINAMICS S120 is equipped with:
● A Control Unit that handles drive and technological functions across all axes.
● Additional system components that enhance functionality and offer different interfaces for
encoders and process signals.
SINAMICS S120 components were developed for installation in cabinets. They have the
following features and characteristics:
● Easy to handle, simple installation and wiring
● Practical connection system, cable routing in accordance with EMC requirements
● Standardized design, seamless integration.
Boundary conditions for use
The Power Modules, Active Interface Modules, Line Modules and Motor Modules are
designed for connection to a liquid coolant circuit which must be provided by the customer.
The design of this liquid coolant circuit is an important factor in determining the operational
reliability and service life of the equipment and the entire installation.
The main criteria are described in the following chapters.
Advantages of liquid cooling over air cooling
Liquid cooling systems are considerably more efficient at dissipating heat losses than air
cooling systems. As a result, liquid-cooled devices are much more compact than air-cooled
units with the same output rating. Since the heat losses generated by the electronic
components are almost completely dissipated by the liquid coolant, only very small cooling
fans are required. This means that the devices are quiet in operation. Due to their compact
dimensions and almost negligible cooling air requirement, liquid-cooled units are the
preferred solution wherever installation space is restricted and/or the ambient operating
conditions are rough. Control cabinets with liquid cooling are easy to implement as
hermetically sealed units with IP54 degree of protection or above.
Liquid-cooled chassis power units
Manual, (GH7), 11/2016, 6SL3097-4AM00-0BP7
System overview
2.2 SINAMICS S120 drive system
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