Airflow Direction In Ex4300 Switch Models; Figure 27: Fan Module Used In An Ex4300 Switch; Table 24: Fan Modules In Ex4300 Switches; Table 25: Airflow Direction In Ex4300 Switch Models - Juniper EX4300 Hardware Manual

EX4300 Switch Hardware Guide

Table 24: Fan Modules in EX4300 Switches

Fan Module
EX4300-FAN
EX4300-FAN-AFI

Airflow Direction in EX4300 Switch Models

Table 25: Airflow Direction in EX4300 Switch Models

Model Number
EX4300-24T
EX4300-24P
EX4300-32F
EX4300-48T
EX4300-48P
EX4300-32F-DC
EX4300-48T-DC
44

Figure 27: Fan Module Used in an EX4300 Switch

You must remove only one fan module at a time for replacement from the rear 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: Both the fan modules must be installed for optimal functioning of
the switch.
The fan modules are available in two models that have different airflow
directions—back-to-front (air enters through the back of the switch), indicated by label
, and front-to-back (air exhausts through the back of the switch), indicated
AIR IN (AFI)
by label AIR OUT (AFO) . Table 24 on page 44
the direction of airflow in them.
Table 25 on page 44 shows the direction of airflow in EX4300 switch models as shipped.
Fan Modules and Power Supply
The switch ships with two fan modules and
an AC power supply, each with a label
.
OUT (AFO)
The switch ships with two fan modules and a
DC power supply, each with a label
(AFO) .
lists the available fan module models and
Label on the Fan Module
AIR OUT (AFO)
AIR IN (AFI)
Direction of Airflow
Front-to-back—that is, air intake to cool the
chassis is through the vents on the front panel
AIR
of the chassis and hot air exhausts through
the vents on the rear panel of the chassis.
Front-to-back—that is, air intake to cool the
chassis is through the vents on the front panel
AIR OUT
of the chassis and hot air exhausts through
the vents on the rear panel of the chassis.
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