Juniper EX4300 Series Hardware Manual page 33

Table 7: Airflow Direction in Power Supplies for EX4300 Switches
Power Supply Label on Power Supply
Rating
350 W AC AIR IN (AFI)
350 W AC AIR OUT (AFO)
550 W DC AIR IN (AFI)
550 W DC AIR OUT (AFO)
715 W AC AIR OUT (AFO)
1100 W AC AIR OUT (AFO)
Direction of Airflow
Back-to-front—that is, air intake to cool the
chassis is through the vents on the rear
panel of the chassis and hot air exhausts
through the vents on the front panel of the
chassis.
Front-to-back—that is, air intake to cool the
chassis is through the vents on the front
panel of the chassis and hot air exhausts
through the vents on the rear panel of the
chassis.
Back-to-front—that is, air intake to cool the
chassis is through the vents on the rear
panel of the chassis and hot air exhausts
through the vents on the front panel of the
chassis.
Front-to-back—that is, air intake to cool the
chassis is through the vents on the front
panel 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 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 of the chassis and hot air exhausts
through the vents on the rear panel of the
chassis.
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