ME60
Hardware Description
1 Hardware Description
Issue 01 (2018-05-07)
130
Figure 1-73
Diagram of air flows
1.9.3.2 Fan Speed Adjustment
When the system is configured to the largest capacity, the fan rotation speeds are adjusted
based on the temperatures reported by the sensors on the SRUs, Interface boards, and SFUs.
Ambient
Temperature
Rotational
Speed
Noise/Heat Control
Below 27°C
(75.2°F)
Low
rotation
speed
(35%)
When the ambient temperature is below 27°C (75.2°F),
fans rotate at a fixed low speed, which meets the noise
requirement and the heat dissipation requirement.
27°C-40°C
(75.2°F-104°F)
Linear
speed
adjustment
When the ambient temperature is between 27°C
(75.2°F) and 40°C (104°F), the fan rotation speeds are
adjusted smoothly in linear mode, and the fan noise does
not change violently.
Above 40°C
(104°F)
High
rotation
speed
(100%)
When the ambient temperature is above 45°C (104°F),
fans rotate at a fixed high speed, which meets heat
dissipation requirements.
1.9.3.3 Fan Module
The fan module is located on the air exhaust vent. When a single fan fails, the heat dissipation
system enables the system to work for a short period of time at an ambient temperature of
40°C (104°F).