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8.12
Control cabinet cooling
The following options are available for cooling the control cabinet:
• Filter fans
• Heat exchangers
• Cooling unit
The environmental conditions and the cooling power required define the method used to cool
the control cabinet.
Observe the air routing within the control cabinet and the specified ventilation clearances. No
components may be mounted and no cables routed in the ventilation clearance spaces.
NOTICE
Reduction of the component service lives through incorrect mounting
If you do not observe the guidelines when mounting components in the control cabinet, this
can reduce the service life of components and result in premature component failure.
• Observe the guidelines for installing components.
8.12.1
General information on ventilation
The components are force-ventilated using integrated fans and cooled by natural convection.
Variable speed fans are used whose speed depends on the heat sink temperature. When the
pulse enable is issued, the fans operate for approx. 10 s at their maximum speed. The speed is
reduced as a function of the heat sink temperature.
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 they do
not cover the ventilation slots.
Air guidance
The cooling air must flow through the components vertically from the bottom (cold region) to
the top (warm region heated up when the system is operational).
• Ensure that the air flows in the right direction if you are using filter fans, heat exchangers or
air-conditioning units.
• Ensure that warm air can escape at the top.
• Maintain a ventilation clearance of at least 80 mm above and below.
Control cabinet design and EMC booksize
8.12 Control cabinet cooling
Booksize power units
Equipment Manual, 01/2022, 6SL3097-6AC30-0BP0
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