Table 27: Details of the AC Power Supplies in EX4300 Switches
(continued)
1100 W AC Power Supply
715 W AC Power Supply
350 W AC Power Supply
Details
Front-to-back, indicated by
label
AIR OUT (AFO)
Front-to-back, indicated by
label
AIR OUT (AFO)
•
Front-to-back, indicated
by label
AIR OUT (AFO)
•
Back-to-front, indicated
by label
AIR IN (AFI)
Airflow
1
1
1
AC power cord retainer
IN OK
and
OUT OK
IN OK
and
OUT OK
IN OK
and
OUT OK
Power supply status LEDs
115–240 VAC
100–240 VAC
100–240 VAC
Operating range
To prevent electrical injury while installing or removing AC power supplies, carefully follow
instructions in
“Installing an AC Power Supply in an EX4300 Switch” on page 221
and
“Removing an AC Power Supply from an EX4300 Switch” on page 223
.
AC Power Supply Airflow
Each power supply has its own fan and is cooled by its own internal cooling system.
Each power supply has a label
AIR OUT (AFO)
or
AIR IN (AFI)
on the faceplate of the
power supply that indicates the direction of airflow in the power supply.
Table 28 on page 49
lists the AC power supply models and the direction of airflow in
them.
Table 28: Airflow Direction in AC Power Supply Models for EX4300 Switches
Direction of Airflow
Label on Power
Supply
Model
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)
JPSU-350-AC-AFO-A
Back-to-front—that is, air intake to cool the chassis is through the vents
on the rear panel of the chassis and hot air exhausts through the vents on
the front panel of the chassis.
AIR IN (AFI)
JPSU-350-AC-AFI-A
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)
JPSU-715-AC-AFO-A
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)
JPSU-1100-AC-AFO-A
49
Copyright © 2015, Juniper Networks, Inc.
Chapter 4: Power Supplies
Summary of Contents for EX4300
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