Table 8: Airflow Direction in Power Supply for EX4300 Switches
(continued)
Direction of Airflow
Label on Power Supply
Power Supply Rating
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.
AIR OUT (AFO)
1100 W AC
For more information, see
“Cooling System and Airflow in an EX4300 Switch” on page 41
.
CAUTION:
Do not mix:
•
AC and DC power supplies in the same chassis.
•
Power supplies with different airflow labels (
AIR IN (AFI)
and
AIR OUT
(AFO)
) in the same chassis.
•
Fan modules with different airflow labels (
AIR IN (AFI)
and
AIR OUT (AFO)
)
in the same chassis.
•
Power supplies and fan modules with different airflow labels (
AIR IN (AFI)
and
AIR OUT (AFO)
) in the same chassis.
Fan Modules
In the EX4300 switches the fan modules are hot-insertable and hot-removable
field-replaceable units (FRUs).
All the EX4300 switch models, except EX4300-24T-S, EX4300-24P-S, EX4300-32F-S,
EX4300-48T-S, and EX4300-48P-S switches are shipped with two fan modules
pre-installed in the rear panel of the switch. EX4300-24T-S, EX4300-24P-S,
EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S switches are not shipped with
pre-installed fan modules; you must order them separately.
The fan modules are available in two models that have different airflow
directions—back-to-front airflow, indicated by the label
AIR IN (AFI)
and front-to-back
airflow, indicated by the label
AIR OUT (AFO)
. See
“Cooling System and Airflow in an
EX4300 Switch” on page 41
.
CAUTION:
Do not mix:
•
Fan modules with different airflow labels (
AIR IN (AFI)
and
AIR OUT (AFO)
)
in the same chassis.
•
Power supplies with different airflow labels (
AIR IN (AFI)
and
AIR OUT
(AFO)
) in the same chassis.
Copyright © 2015, Juniper Networks, Inc.
12
EX4300 Switch Hardware Guide
Summary of Contents for EX4300
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