Juniper QFX5120-48Y-AFO2 - Page 42

Table 12: Airflow Direction in QFX5120 Switch Models (continued)
Power Supplies
Direction of
Airflow in the Fan
Module
Color of the Fan
Module
Fan Modules and
Power SupplyModel Number
For switches that
have fan modules
with the AIR IN
label, you must
install only power
supplies that have
the AIR IN label.
Back-to-front—air
intake to cool the
chassis is through
the vents on the
rear panel of the
chassis, and hot air
exhausts through
the vents on the
front panel of the
chassis.
Juniper Azure BlueThe switch ships
with six fan
modules and two
AC power supplies,
each with a label
AIR IN.
QFX5120-32C-AFI
For switches that
have fan modules
with the AIR OUT
label, you must
install only power
supplies that have
the AIR OUT label.
Front-to-back—air
intake to cool the
chassis is through
the vents on the
front panel of the
chassis, and hot air
exhausts through
the vents on the
rear panel of the
chassis.
Juniper GoldThe switch ships
with five fan
modules and two
AC power supplies,
each with a label
AIR OUT.
QFX5120-48Y-AFO2
For switches that
have fan modules
with the AIR IN
label, you must
install only power
supplies that have
the AIR IN label.
Back-to-front—air
intake to cool the
chassis is through
the vents on the
rear panel of the
chassis, and hot air
exhausts through
the vents on the
front panel of the
chassis.
Juniper Azure BlueThe switch ships
with five fan
modules and two
AC power supplies,
each with a label
AIR IN.
QFX5120-48Y-AFI2
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