Juniper EX4300 Series

Table 7: Airow Direcon in Power Supplies for EX4300 Switches
Power Supply
Rang
Label on Power Supply Direcon of Airow
350 W AC AIR IN (AFI) 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.
350 W AC AIR OUT (AFO) 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.
550 W DC AIR IN (AFI) 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.
550 W DC AIR OUT (AFO) 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.
715 W AC AIR OUT (AFO) 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.
1100 W AC AIR OUT (AFO) 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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