Dell S5448F-ON, Руководство по установке

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Fans
The S5448F-ON switch comes from the factory with two PSUs and six fan modules that are installed in the switch. The fan
modules and power supplies, which have integrated fans, are hot-swappable.
Besides the power supply modules, you can order and install fan modules separately.
The S5448F-ON switch supports two airflow direction options. To avoid damage to the switch, do not mix airflow types in a
switch; you can use only a single airflow direction in a switch. If the airflow directions are mismatched,
you must correct the
mismatched airflow direction .
CAUTION: Switches with fan airflow from the PSU to the I/O—reverse airflow—are subject to tighter
restrictions for power consumption on cables and optics that are used for 400 GbE ports. Reverse airflow
switches do not support high-power cables or optics. 400 GbE transceivers and active cables may exceed
the supported threshold. For more information, see the
High-Power Optics for SmartFabric OS10 Dell EMC
PowerSwitch S5448F-ON.
.
● Airflow is from the I/O panel to the PSU—the red indicator is the normal airflow direction.
● Airflow is from the PSU to the I/O panel—the blue indicator is the reverse airflow direction.
Environmental factors can decrease the amount of time that is required between fan replacements. Check the environmental
factors regularly. An increase in temperature or particulate matter in the air might affect performance—for example, new
equipment installation).
Acoustic data
The following lists the acoustic performance data for the S5448F-ON switch:
NOTE: Acoustic numbers indicate a potential high-to-low range. Volume may increase as power demands and
environmental temperature rise.
NOTE:
●
1
The operating condition was defined with 100% traffic and full optics (QSFPDDx8, SFPDDx48) population.
●
2
The LwA,m is declared A-weighted Sound Power Level per ISO9296 (2017) with data collected from a single sample.
The statistical adder is 0.4 bels.
●
3
The LpA,m is the A-weighted sound pressure level at the bystander position per section 4.3 of ISO 9296 (2017) and
measured in accordance with ISO 7779 (2010). The system is placed on an ISO table.
●
4
Prominent tones: Criteria of D.6 and D.11 of ECMA-74 (17th ed., Dec. 2019) are followed to determine if discrete tones
are prominent and to report them.
I/O-to-PSU airflow direction:
● 25°C operating
1
@ 50% duty cycle, 8.2 bels
2
, 70 dBA
3
● 35°C operating
1
@ 70% duty cycle, 8.6 bels
● 45°C operating
1
@ 100% duty cycle, 9.4 bels, 81 dBA
NOTE:
4
No prominent tone under the 25°C operating condition.
PSU-to-I/O airflow direction:
● 25°C operating
1
@ 60% duty cycle, 8.4 bels
2
, 72 dBA
3
● 35°C operating
1
@ 80% duty cycle, 8.9 bels
● 45°C operating
1
@ 100% duty cycle, 9.2 bels, 81 dBA
NOTE:
4
There is a prominent tone at 1122 Hz under the 25°C operating condition.
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