Follow these environmental guidelines:
•
The site must be as dust-free as possible, because dust can clog air intake vents and filters, reducing the
efficiency of the switch cooling system.
•
Maintain ambient airflow for normal switch operation. If the airflow is blocked or restricted, or if the
intake air is too warm, the switch might overheat, leading to the switch temperature monitor shutting
down the device to protect the hardware components.
Table 25 on page 67 provides the required environmental conditions for normal switch operation for
QFX5120.
Table 25: QFX5120 Environmental Tolerances
SeismicTemperatureRelative HumidityAltitude
Switch or
Device
Designed to comply
with Zone 4 earthquake
requirements per NEBS
GR-63-CORE, Issue 3.
•
Normal operation
ensured in
temperature range of
32° F through 104° F
(0° C through 40° C).
•
Non-operating
storage temperature
in shipping container:
–40° F through 158°
F (–40° C through
70° C)
Normal operation
ensured in relative
humidity range of 5%
through 90%,
noncondensing
No performance
degradation to 6000
feet (1829 meters)
QFX5120-48Y
•
Normal operation
ensured in
temperature range of
32° F through 104° F
(0° C through 40° C)
•
Nonoperating
storage temperature
in shipping container:
–40° F through 158°
F (–40° C through
70° C)
Normal operation
ensured in relative
humidity range of 5%
through 90%,
noncondensing
No performance
degradation to 16404
feet (5000 meters)
QFX5120-32C
NOTE: Install the QFX5120 only in restricted areas, such as dedicated equipment rooms and
equipment closets, in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical
Code, ANSI/NFPA 70.
67
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