Figure 6: Fan Module For Ex4600 Switches; Table 6: Fan Modules For Ex4600 Switches - Juniper EX4600 Series Hardware Manual

EX4600 Switch Hardware Guide

Table 6: Fan Modules for EX4600 Switches

Fan Module Airflow Diagram
QFX5100-FAN-AFI Figure 7 on page 15
14

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
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:
Label on
the Fan
Module
AIR IN
Color of Direction of
Fan Airflow in the
Module Fan Module
Juniper FRU-to-port,
Azure Blue 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).
AIR OUT . On legacy
Power
Supplies
You must install
only power
supplies that
have AIR IN
labels in
switches in
which the fan
modules have
labels.
AIR IN
Copyright © 2014, Juniper Networks, Inc.