Dell EMC PowerSwitch S3048-ON Installation Guide June 2021


Fans and airflow

The S3048–ON fans support two airflow options—normal and reverse.

Fan combinations

Installation of the fans is done as part of the factory install based on stock keeping units (SKU) type. The S3048-ON has SKUs that support the following configurations:

  • AC PSU with fan airflow from the I/O to the PSU
  • AC PSU with fan airflow from the PSU to the I/O

Be sure to order the fans suitable to support your site’s ventilation. Use a single type of airflow fan in your switch. Do not mix reverse and normal airflows in a single S3048–ON chassis.

For proper ventilation, position the S3048-ON in an equipment rack or cabinet with a minimum of 5 inches (12.7 cm) of clearance around the exhaust vents. When you install two S3048-ON switch near each other, to permit proper airflow, position the two chassis at least 5 inches (12.7 cm) apart. The fan speed increases when the internal temperature reaches 161.6°F (72°C) and decreases to normal speed when the temperature falls to 136.4°F (58°C). The S3048-ON never intentionally turns off the fans.

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