Front-To-Back Airflow - Juniper EX4300 Hardware Manual

Table 25: Airflow Direction in EX4300 Switch Models (continued)
Model Number
EX4300-48T-AFI
EX4300-48T-DC-AFI

Front-to-Back Airflow

Copyright © 2017, Juniper Networks, Inc.
Fan Modules and Power Supply
The switch ships with two fan modules and
an AC power supply, each with a label
.
(AFI)
The switch ships with two fan modules and a
DC power supply, each with a label
.
(AFI)
CAUTION: Do not mix:
AC and DC power supplies in the same chassis
Power supplies and fan modules with different airflow labels (
and
AIR OUT (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 switch models that have front-to-back airflow, the air intake to cool the
chassis is through the vents on the front panel of the switch and hot air exhausts through
the vents on the rear panel. See
Chapter 3: Cooling System and Airflow
Direction of Airflow
Back-to-front—that is, air intake to cool the
chassis is through the vents on the rear panel
AIR IN
of the chassis and hot air exhausts through
the vents on the front panel of the chassis.
Back-to-front—that is, air intake to cool the
chassis is through the vents on the rear panel
AIR IN
of the chassis and hot air exhausts through
the vents on the front panel of the chassis.
) in the same chassis
AIR IN (AFI)
) in the same chassis.
Figure 28 on page 46 and
AIR IN (AFI)
and AIR OUT (AFO)
AIR IN (AFI)
Figure 29 on page 46.
)
45