Juniper EX4600 Series User Manual

Figure 6: Fan Module for EX4600 Switches
You remove and replace a fan module from the management panel of the chassis. The
switch continues to operate for a limited period of time (30 seconds) during the
replacement of the fan module without thermal shutdown.
NOTE: All fan modules must be installed for optimal operation of the switch.
The fan modules are available in two product SKUs that have different airflow
directions—FRU-to-port airflow, indicated on some units by the blue color and the label
AIR IN , or port-to-FRU, indicated by the gold color and the label AIR OUT . On legacy
switches or switches with LCDs, this airflow is also called front-to-back and back-to-front.
Table 6 on page 14 lists the available fan module product SKUs and the direction of
airflow in them:
Table 6: Fan Modules for EX4600 Switches
Power
Supplies
Direction of
Airflow in the
Fan Module
Color of
Fan
Module
Label on
the Fan
ModuleAirflow DiagramFan Module
You must install
only power
supplies that
have AIR IN
labels in
switches in
which the fan
modules have
AIR IN labels.
FRU-to-port,
that is, air comes
in from the end
of the switch
with the fans; air
exhausts from
the switch end
with ports (also
known as
back-to-front
airflow).
Juniper
AzureBlue
AIR INFigure7onpage 15QFX5100-FAN-AFI
Copyright © 2014, Juniper Networks, Inc.14
EX4600 Switch Hardware Guide

Juniper EX4600 Series Specifications

General

Product Series	EX4600
10GbE ports	24 or 48
Cooling	Front-to-back or back-to-front airflow
Rack Units	1 U
Virtual Chassis	Up to 10 members
MAC address table size	288, 000 entries
Memory	8 GB DRAM
Layer 3 Routing	Yes
AC Power Input	100-240V AC
Ports	24 or 48 x 10GbE ports
40GbE ports	4
100GbE ports	0
Power Supply	Dual redundant, hot-swappable AC or DC
Jumbo frames	9216 bytes
Operating temperature	0°C to 45°C
Input voltage	100-240 VAC, -40 to -72 VDC
Operating relative humidity	5% to 90% noncondensing
Fans	Redundant
JUNOS OS	Junos OS
Storage	16 GB flash
DC Power Input	-40 to -72 VDC