Juniper EX4650 Series User Manual

Table 19: Airflow Direction in DC Power Supply Models for EX4650 Switches (continued)
Direction of Airflow
Label on Power
SupplyModel
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)JPSU-550-DC-AFI-A
DC Power Supply in EX4650 Switches
IN THIS SECTION
DC Power Supply in EX4650 Switches | 50
Airflow Direction in Power Supplies | 51
EX4650 switches support two DC power supplies with either front-to back or back-to-front airflow. Power
supplies for the EX4650 switch are fully redundant, load-sharing, and hot-removable and hot-insertable
FRUs. The EX4650 switch models are shipped with two power supplies preinstalled in the rear panel of
the chassis.
DC Power Supply in EX4650 Switches
The DC power supply in EX4650 is 650 W with dual feeds for power resiliency. Figure 23 on page 50
shows a DC power supply for an EX4650 switch.
Figure 23: DC power supply for an EX4650 switch
50

Juniper EX4650 Series Specifications

General

Brand	Juniper
Model	EX4650 Series
Category	Switch
Language	English