Fan Modules - Juniper EX4300 Hardware Manual

EX4300 Switch Hardware Guide
Table 8: Airflow Direction in Power Supply for EX4300 Switches (continued)
Power Supply Rating Label on Power Supply
1100 W AC
AIR OUT (AFO)

Fan Modules

12
For more information, see
CAUTION: Do not mix:
AC and DC power supplies in the same chassis.
Power supplies with different airflow labels (
) in the same chassis.
(AFO)
Fan modules with different airflow labels (
in the same chassis.
Power supplies and fan modules with different airflow labels (
and AIR OUT (AFO)
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
airflow, indicated by the label
EX4300 Switch" on page 41.
CAUTION: Do not mix:
Fan modules with different airflow labels (
in the same chassis.
Power supplies with different airflow labels (
) in the same chassis.
(AFO)
Direction of Airflow
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.
"Cooling System and Airflow in an EX4300 Switch" on page
) in the same chassis.
. See "Cooling System and Airflow in an
AIR OUT (AFO)
and
AIR IN (AFI) AIR OUT
AIR IN (AFI) and AIR OUT (AFO)
AIR IN (AFI)
and front-to-back
AIR IN (AFI)
and
AIR IN (AFI) AIR OUT (AFO)
and
AIR IN (AFI) AIR OUT
Copyright © 2015, Juniper Networks, Inc.
41.
)
)