Beijer Electronics BoX2 base Installation Manual page 18

Additional Installation Tips
Top
50 °C inside
BoX2
Power
device
Power
30 °C outside Middle
45 °C inside
Power
Bottom
40 °C inside
In most cases, the ambient temperature for the BoX2 device is significantly higher than the device
cabinet's ambient temperature.
If the cabinet is tall and there are several heat-generating devices, the temperature at the top of the
cabinet is considerably higher than the temperature increase that would be expected. All electronics
are sensitive to heat. The lifespan of an electrolytic capacitor is cut in half with an 8-10 °C increase
in temperature. A 15-20 °C temperature increase results in a quarter of the lifespan etc.
Rittal has a good program for estimating the anticipated average temperature in the cabinet as well
as a large program for controlling the temperature in the device cabinet.
An enamel-coated steel cabinet has a radiant heat value of 5.5 W/m
Installing a fan inside the cabinet evens out the temperature, while moving air provides considerably
better cooling than still air.
Install the fan so that it sits in a cooler area and blows cold air against the BoX2 device. If the fan
is mounted at the top and sucks warm air upwards, the ambient temperature of the fan becomes
higher, resulting in a shorter lifespan.
An approximate value of the net power consumption for the device can be calculated by multiplying
the supply voltage with the current drawn by the device. This is assuming that all supplied power is
transformed to heat.
NOTE
Please ensure that the temperature will not exceed the maximum ambient operating
temperature in the enclosure. This can be influenced by other heat generating
devices.
2023-09
Axial fan
120 x 120 mm
Airflow
2
per °C.
18 Beijer Electronics, MAEN274