Ventilation - Siemens SINAMICS S120 Manual

Cabinet design and EMC
9.3 Cabinet air conditioning
9.3.2

Ventilation

The SINAMICS S120 Chassis devices are forced-ventilated by means of integrated fans. To
ensure an adequate air supply, suitably large openings for the inlet intake (e.g. ventilation
slots in the cabinet door) and discharged air (e.g. by means of a roof canopy) must be
provided.
The cooling air must flow through the components vertically from bottom (cooler region) to
top (region heated by operation).
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. The specified ventilation clearances must be observed.
Note
Cables must not be routed directly on the components. The ventilation grilles must not be
covered.
Cold air must not be allowed to blow directly onto electronic equipment.
NOTICE
Device failure due to condensation as a result of unsuitable air guidance and cooling
Unsuitable air guidance and cooling equipment can cause condensation, which can result in
device failure.
• Choose air guidance measures, as well as the arrangement of and settings for the
• If required, install cabinet enclosure heating.
422
cooling equipment in such a way as to prevent condensation even with the highest
relative humidity.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3