Siemens Sinamics S120 Manual page 772

Cabinet design and EMC Booksize
12.12 Notes on electrical cabinet cooling
Fan operation as of firmware version 2.6
The fans can be controlled as a function of the heat sink temperature.
The fans start to run at a specific heat sink temperature for the particular device – or when a
pulse enable is set. They switch themselves off with a small hysteresis as soon as the heat
sink temperature, which has been saved, is fallen below and there is no pulse enable. The
fan run on time can be parameterized (see SINAMICS S120/S150 List Manual).
Note
For the 5 kW and 10 kW Smart Line Modules, the fan runs permanently.
The cooling air must flow through the components vertically from bottom (cooler region) to
top (region heated by operation).
If filtered fans, heat exchangers, or air conditioners are used, you must ensure that the air is
flowing in the right direction. You must also ensure that the warm air can escape at the top.
A ventilation clearance of at least 80 mm above and below must be observed.
Danger to life if the fundamental safety instructions and remaining risks are not carefully
observed
If the fundamental safety instructions and remaining risks in Chapter 1 (Page 25) are not
observed, accidents involving severe injuries or death may occur.
• Adhere to the fundamental safety instructions.
• When assessing the risk, take into account residual risks.
NOTICE
Damage caused by overheating resulting from covered ventilation slots
Covered ventilation slots can cause the system to overheat.
• Route the connected signal and power cables to the components in such a way that
Note
The distance between the discharge opening of the air condition equipment and the
electronic equipment must be at least 200 mm.
Note
If the components are mounted in a sealed cabinet, an internal air cooling system must be
installed to circulate the air and prevent hot spots. It is best to mount the fan above the
components to optimize the air flow (suction).
772
WARNING
they do not cover the ventilation slots.
Booksize Power Units
Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6