Juniper OCX1100, Hardware Manual

Page: 45 / 204

AC Power Supply Airflow
Each power supply has its own fan and is cooled by its own internal cooling system.
Each power supply has the label
AIR OUT (AFO)
or
AIR IN (AFI)
on the faceplate of the
power supply that indicates the direction of airflow in the power supply.
Table 15 on page 25 lists the AC power supply models and the direction of airflow in them.
Table 15: Airflow Direction in AC Power Supply Models for OCX1100-48SX Switches
Direction of Airflow Label on Power Supply Model
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.
AIR OUT (AFO)
OCX-460W-X-AC-AFO
Back-to-front—that is, air intake to cool the chassis is through the vents
on the rear panel of the chassis and hot air exhausts through the vents
on the front panel of the chassis. AIR IN (AFI) OCX-460W-X-AC-AFI
Related
Documentation
Power Supply LEDs in OCX1100 Switches on page 27
•
•
AC Power Supply Specifications for OCX1100 Switches on page 41
•
Installing an AC Power Supply in an OCX1100 Switch on page 77
DC Power Supply in OCX1100 Switches
The DC power supply in OCX1100 switches is a hot-insertable and hot-removable
field-replaceable unit (FRU): You can install it without powering off the switch or
disrupting switch functions.
All OCX1100-48SX switches that are powered by DC power supplies are shipped with
two DC power supplies preinstalled in the rear panel of the switches.
This topic describes the DC power supplies.
CAUTION: Do not install:
•
AC and DC power supplies in the same chassis.
•
AC power supplies in DC switch models or DC power supplies in AC switch
models.
• Power supplies 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.
25 Copyright © 2017, Juniper Networks, Inc.
Chapter 4: Power Supplies