Juniper EX4650 Series, Hardware Manual, Page: 34 / 195

(air exhausts through the back of the switch), indicated by label AFO and gold color. Table 11 on page 35
lists the available fan module models and the direction of airflow in them.
Table 11: Fan Modules in EX4650 Switches
Power Supplies
Direction of
Airflow in the Fan
Module
Color of the Fan
Module
Label on the Fan
Module Fan Module
You must install only
power supplies that
have AIR OUT(AFO)
labels in switches
that have fan
modules with AIR
OUT labels.
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 Gold AFO EX4650-FANAFO
You must install only
power supplies that
have AIR IN(AFI)
labels in switches
that have fan
modules with AIR IN
labels.
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 Blue AFI EX4650-FANAFI
Airflow Direction in EX4650 Switch Models
Table 12 on page 35 shows the direction of airflow in EX4650 switch models as shipped.
Table 12: Airflow Direction in EX4650 Switch Models
Direction of Airflow Fan Modules and Power Supply Model Number
Front-to-back—that is, 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.
The switch ships with five fan modules and
two AC power supplies, each with a label
AIR OUT (AFO).
EX4650-48Y-AFO
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