Juniper EX4300 Hardware Guide

Table 27: Details of the AC Power Supplies in EX4300 Switches (continued)
1100 W AC Power Supply715 W AC Power Supply350 W AC Power SupplyDetails
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
111AC power cord retainer
IN OK and OUT OKIN OK and OUT OKIN OK and OUT OKPower supply status LEDs
115–240 VAC100–240 VAC100–240 VACOperating 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 233 and
“Removing an AC Power Supply from an EX4300 Switch” on page 235.
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 51 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
SupplyModel
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
51Copyright © 2017, Juniper Networks, Inc.
Chapter 4: Power Supplies

Juniper EX4300 Specifications

General

Model	EX4300
Virtual Chassis	Yes, up to 10 members
Layer 3 Routing	Yes
10GBASE SFP+ Ports	4
Jumbo Frames	9216 bytes
MAC Address Table Size	32, 000
Operating System	Junos OS
Uplink Ports	4 x 10GBASE SFP+
Power Supply	AC or DC options
Operating Temperature	0°C to 45°C (32°F to 113°F)
Input Voltage	100-240V AC
Operating Relative Humidity	5 to 90% RH, non-condensing
Management Options	CLI, Web UI, Junos Space
Redundancy	Yes, power supply and fans
Storage Temperature	-40°F to 158°F (-40°C to 70°C)
Ports	24 or 48