Figure 7: Qfx5200 Fan Modules; Table 11: Fan Modules In Qfx5200 Switches; Table - Juniper QFX5200 Hardware Manual

QFX5200 Switch Hardware Guide

Table 11: Fan Modules in QFX5200 Switches

Fan Module Airflow Diagram
Q F X 5 2 0 0 - 3 2 C - F A N A F I Figure 8 on page 19
Q F X 5 2 0 0 - 3 2 C - F A N A F O Figure 9 on page 19
18

Figure 7: QFX5200 Fan Modules

You remove and replace a fan module from the FRU end 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 azure blue color or a
label. FRU-to-port airflow versions of the fan module that have labels are marked
. Likewise, port-to-FRU airflow is indicated by either a gold color or the label
IN
. On legacy switches or switches with LCDs, this airflow is also called front-to-back and
back-to-front. Table 11 on page 18
direction of airflow in them:
Label on the
Fan Module
AIR IN
AIR OUT
In data center deployments, position the switch in such a manner that the
on switch components are next to the cold aisle, and
components are next to the hot aisle.
lists the available fan module product SKUs and the
Color of Fan Direction of Airflow in the
Module Fan Module
Juniper Azure FRU-to-port, that is, air
Blue 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 Gold Port-to-FRU, that is, air
comes in through vents on
the end with ports; air
exhausts out the end with
the fans (also known as
front-to-back airflow).
AIR OUT
Power Supplies
You must install
only power supplies
that have
AIR IN
labels in switches
in which the fan
modules have
labels.
IN
You must install
only power supplies
that have
AIR OUT
labels in switches
in which the fan
modules have
labels.
OUT
AIR IN
labels on switch
AIR OUT
Copyright © 2017, Juniper Networks, Inc.
AIR
AIR
AIR
labels