Fan Modules - Juniper QFX5110 Series Hardware Documentation

Table 10: Airflow Direction in Power Supplies for EX4300 Switches (continued)
Power Supply
Rating Label on Power Supply
715 W AC AIR OUT (AFO)
1100 W AC AIR OUT (AFO)
1400 W AC AIR OUT (AFO)
NOTE: Only
EX4300-48MP and
EX4300-48MP-S
switches support
1400 W AC power
supply.
For more information, see Cooling System and Airflow in an EX4300 Switch.
CAUTION:
AC and DC power supplies in the same chassis.
Power supplies with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the
same chassis.
Fan modules with different airflow labels (AIR IN (AFI) and AIR OUT (AFO)) in the
same chassis.
Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR
OUT (AFO)) in the same chassis.

Fan Modules

In the EX4300 switches the fan modules are hot-insertable and hot-removable field-replaceable units
(FRUs).
Do not mix:
Direction of Airflow
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.
80