Figure 12: Power Supply Handle Detail; Table 13: Airflow Direction In Qfx5200 Ac Power Supplies - Juniper QFX5200 Hardware Manual

QFX5200 Switch Hardware Guide

Table 13: Airflow Direction in QFX5200 AC Power Supplies

Product Number
JPSU-850W-AC-AFI
JPSU-850W-AC-AFO
Related
Documentation
24
The power supply provides FRU-to-port or port-to-FRU airflow depending on the product
SKU you purchase. On legacy switches, or switches with an LCD, this airflow is called
back-to-front and front-to-back. The power supplies either have labels on the handles
that indicate the direction of airflow or they have color-coded handles with a fan icon.
See Figure 12 on page 24 for an example of the power supply. Either a power supply has
the label or a blue handle, which denotes FRU-to-port airflow. A power supply with
AFI
the label AFO or a gold-colored handle denotes port-to-FRU airflow.

Figure 12: Power Supply Handle Detail

1— Fan icon on handle
CAUTION: Verify that the airflow direction on the power supply handle
matches the direction of airflow in the 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 13 on page 24 shows the different power supplies and their direction of airflow.
Direction of Airflow
FRU-to-port
Port-to-FRU
To avoid electrical injury, carefully follow instructions in
QFX5200" on page 65.
AC Power Cord Specifications for a QFX Series Device on page 39
QFX5200 AC Power Supply on page 23
QFX5200 Management Panel on page 11
QFX5200 Field-Replaceable Units on page 9
QFX5200 AC Power Specifications on page 39
Color of Power Supply Handle
Juniper Azure Blue
Juniper Gold
"Connecting AC Power to a
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