Airflow Direction In Ex4300 Switch Models; Figure 27: Fan Module Used In An Ex4300 Switch; Table 24: Fan Modules In Ex4300 Switches; Fan Modules - 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

42

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 42
the direction of airflow in them.
NOTE: The 32-port EX4300 switches support fan modules and power
supplies with the
Table 25 on page 43 shows the direction of airflow in EX4300 switch models as shipped.
lists the available fan module models and
AIR OUT (AFO) label only.
Label on the Fan Module
AIR OUT (AFO)
AIR IN (AFI)
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