Fan Modules - Juniper EX4300 Hardware Manual

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

Fan Modules

12
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 (
(AFO) ) in the same chassis.
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
preinstalled 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
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 43.
CAUTION: Do not mix:
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.
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.
AIR OUT (AFO) . See "Cooling System and Airflow in an
Copyright © 2017, Juniper Networks, Inc.
and
AIR IN (AFI) AIR OUT
and
AIR OUT (AFO)
AIR IN (AFI)
and front-to-back
AIR IN (AFI)
43.
)