ENVIRONMENTAL CONDITIONS
OPERATING TEMPERATURE RANGE
For the 25 W SDB670 Base Stations, the operating temperature range is as follows:
AC version: −30 °C to +55 °C (−22 °F to +131 °F) ambient temperature.
DC version: −30 °C to +60 °C (−22 °F to +140 °F) ambient temperature.
The storage temperature range for both AC and DC versions is −40 °C to +80 °C (−40
°F to +176 °F).
Ambient temperature is defined as the temperature of the air at the intake to the
cooling fans.
HUMIDITY
The humidity should not exceed 95% relative humidity non-condensing through the
specified operating temperature range.
DUST AND DIRT
The SDB670 Base Station has an Ingress Protection rating of IP30, i.e. it provides
protection against access to hazardous parts and the ingress of solid foreign objects
>12.5 mm in size.
VENTILATION
The SDB670 Base Station uses forced air cooling to maintain internal temperatures
and adequate cooling airflow is critical to the performance of the base station.
Whether wall mounted or rack mounted, always ensure that there is adequate
ventilation around the base station. The ambient temperature must be kept within the
specified range and it is strongly recommended that the cooling airflow is not
restricted.
For the SDB670 Base Station, the essential cooling airflow (recommended <40 °C)
enters through one side of the unit and the hot exhaust air exits at the rear of the
unit. For optimal thermal performance, heated air that has passed through the base
station must not be allowed to re-enter the air intakes of the unit.
At least 72 cm2 of ventilation MUST be provided for each base station at the inlet and
at the outlet.
In order to allow enough airflow through a rack mounted base station, it is
recommended that:
Doc Number: TNM-I-E-0041 Revision 1.6 Page 18
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