Juniper OCX1100, Hardware Manual

Page: 39 / 204

Table 13: Airflow Direction in OCX1100-48SX Switch Models (continued)
Direction of Airflow Fan Modules and Power Supply Model Number
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. The switch ships with four fan modules and
two DC power supplies installed; all bearing
the label
AIR OUT (AFO) .
OCX1100-48SX-D-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. The switch ships with four fan modules and
two AC power supplies installed; all bearing
the label
AIR IN (AFI)
.
OCX1100-48SX-AFI
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. The switch ships with four fan modules and
two DC power supplies installed; all bearing
the label
AIR IN (AFI)
.
OCX1100-48SX-D-AFI
Figure 10 on page 19 shows the location of labels on the power supplies and fan modules
of an OCX1100-48SX switch.
Figure 10: Location of Airflow Labels on the Power Supplies and Fan
Modules of an OCX1100-48SX Switch
2— 1— Airflow labels on the power supplies Airflow labels on the fan modules
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 and fan modules with different airflow labels (
AIR IN (AFI)
and AIR OUT (AFO) ) in the same chassis
• Fan modules with different airflow labels ( AIR IN (AFI) and AIR OUT (AFO) )
in the same chassis.
Front-to-Back Airflow
In the OCX1100 switch models that have front-to-back airflow, the air intake to cool the
chassis is through the vents on the front panel of the switch and hot air exhausts through
the vents on the rear panel. See
Figure 11 on page 20 .
19 Copyright © 2017, Juniper Networks, Inc.
Chapter 3: Cooling System and Airflow