Juniper ACX5448-D Hardware Manual page 53

Figure 36: AC PSM in ACX5448-D and ACX5448-M Routers
The PSMs provide FRU-to-port or port-to-FRU airflow depending on the product model you purchase.
The PSMs either have labels on the handles that indicate the direction of airflow or have color-coded
handles with a fan icon. A PSM with the label AFI or a blue handle denotes FRU-to-port airflow. A PSM
with the label AFO or a gold-colored handle denotes port-to-FRU airflow.
CAUTION:
of airflow in the chassis. Ensure that each PSM that you install in the chassis has the
same airflow direction. If you install PSM with two different airflow directions, Junos
OS raises an alarm. If you need to convert the airflow pattern on a chassis, you must
replace all the fans and PSMs at one time to use the new direction.
Table 18 on page 54 and
Table 18: Airflow Direction in AC PSM for ACX5448
Power Supply Modules
JPSU-650W-AC-AFI
JPSU-650W-AC-AFO
Verify that the airflow direction on the PSM handle matches the direction
Table 19 on page 55 show the different PSMs and their direction of airflow.
Wattage
650 W
Direction of Airflow
Airflow in (back-to-front)
Airflow out
(front-to-back)
Color of Power
Supply Module
Handle
Juniper Azure Blue
Juniper Gold
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