Environmental Specifications - HP FlexFabric 12900E series Installation Manual

supply is 90%. Heat dissipation/hour of the switch is 0.9 × (total power consumption of the cards plus
power consumption of the fan tray)/0.9 × 3.4121.
For the power consumption of the cards and fan trays of the HPE 12900E switches, see
power consumption and system power

Environmental specifications

Table 23 Environmental specifications
Description
Temperature
Relative humidity
(noncondensing)
Noise
The switch uses fan trays that can automatically adjust the fan speed based on the device
temperature. The sound pressure levels vary by fan speed. For more information, see
Table 24 Sound pressure levels
Switch model
12916E (with two fan trays)
12908E (with two fan trays)
12904E (with two fan trays)
NOTE:
The sound pressure levels are measured according to the method specified in ISO 7779 at the
bystander position.
consumption."
Operating
0°C to 40°C (32°F to 104°F)
5% to 95%
Sound pressure level in the
acceptable temperature
range
67.8 dBA
62.1 dBA
67.5 dBA
85
Non-operating
–40°C to +70°C (–40°F to +158°F)
5% to 95%
Sound pressure level when
the fan tray operates at full
speed
91.2 dBA
87.6 dBA
85.3 dBA
"Module
Table 24.