CAUTION: Verify that the airflow direction on the power supply handle
matches the direction of airflow inthe chassis. Ensure that each power supply
you install in the chassis has the same airflow direction. If you install power
supplies with two different airflow directions, Junos OS raises an alarm. If
you need to convert the airflow pattern on a chassis, you must change out
all the fans and power supplies at one time to use the new direction.
Table 12 on page 49 shows the different power supplies and their direction of airflow.
Table 12: Airflow Direction in QFX5100 AC Power Supplies
Color of Power
Supply HandleDirection of AirflowProduct NumberWattage
QFX5100Product
SKUs
Juniper Azure BlueFRU-to-portJPSU-650W-AC-AFI
QFXC01-PWRACI-650A
650 WQFX5100-24Q
QFX5100-48S
QFX5100-48T
JPSU-850W-AC-AFI850 WQFX5100-96S
Juniper GoldPort-to-FRUJPSU-650W-AC-AFO650 WQFX5100-24Q
QFX5100-48S
QFX5100-48T
JPSU-850W-AC-AFO850 WQFX5100-96S
To avoid electrical injury, carefully follow instructions in “Connecting AC Power to a
QFX5100 Device” on page 171.
Related
Documentation
AC Power Cord Specifications for a QFX Series Device on page 80•
• AC Power Supply LEDs on a QFX5100 Device on page 61
• Management Panel of a QFX5100 Device on page 19
• Field-Replaceable Units in a QFX5100 Device on page 12
• AC Power Specifications for a QFX5100 Device on page 79
• Connecting AC Power to a QFX5100 Device on page 171
DC Power Supply in a QFX5100 Device
The QFX5100 switches are shipped from the factory with two power supplies. Eachpower
supply is a hot-removable and hot-insertable field-replaceable unit (FRU) when the
second power supply is installed and running. You can install replacement power supplies
in the two slots next to the fan modules without powering off the switch or disrupting
the switching function.
49Copyright © 2016, Juniper Networks, Inc.
Chapter 4: Power Supplies
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