Figure 12: Power Supply Handle Detail; Table 10: Airflow Direction In Ex4600 And Qfx5100 Ac Power Supplies - Juniper EX4600 Series Hardware Manual

EX4600 Switch Hardware Guide

Table 10: Airflow Direction in EX4600 and QFX5100 AC Power Supplies

Product Number
JPSU-650W-AC-AFI
QFXC01-PWRACI-650A
JPSU-650W-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, and
the fault LED blinks amber. If you need to convert the airflow pattern on
ALM
a chassis, you must change out all the fans and power supplies at one time
to use the new direction.
Table 10 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
EX4600 Switch" on page
AC Power Cord Specifications for an EX4600 Switch on page 79
AC Power Supply LEDs on an EX4600 Switch on page 194
Color of Power Supply
Handle
Juniper Azure Blue
Juniper Gold
147.
"Connecting AC Power to an
Copyright © 2014, Juniper Networks, Inc.