Juniper QFabric QFX3000-G Hardware Documentation page 199

Table 35: Airflow Direction in Power Supplies for EX4300 Switches (continued)
Power Supply Rating Label on Power Supply
1400 W AC
AIR OUT (AFO)
NOTE: Only
EX4300-48MP and
EX4300-48MP-S
switches support
1400 W AC power
supply.
Fan Modules
Copyright © 2018, Juniper Networks, Inc.
For more information, see "Cooling System and Airflow in an EX4300 Switch" on page
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, EX4300-48P-S, and EX4300-48MP-S switches are shipped with two
fan modules preinstalled in the rear panel of the switch. EX4300-24T-S, EX4300-24P-S,
EX4300-32F-S, EX4300-48T-S, EX4300-48P-S, and EX4300-48MP-S switches are
not shipped with preinstalled fan modules; you must order the fan modules 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 156.
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.
AIR IN (AFI)
) in the same chassis.
. See "Cooling System and Airflow in an
AIR OUT (AFO)
AIR IN (AFI)
Chapter 7: EX4300 Overview
AIR IN (AFI) and AIR OUT
and AIR OUT (AFO)
AIR IN (AFI)
AIR IN (AFI) and front-to-back
and
AIR OUT (AFO)
AIR IN (AFI) and AIR OUT
156.
)
)
149