Figure 119: Dc Power Supply For An Ex4300 Switch - Juniper QFabric QFX3000-G Hardware Documentation

Characteristics of a DC Power Supply
Copyright © 2018, Juniper Networks, Inc.
shipped with one DC power supply installed in the rear panel of the switches.
EX4300-24T-S, EX4300-24P-S, EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S
switches are not shipped with power supplies; you must order the power supplies
separately.
This topic describes the DC power supplies.
CAUTION: Do not mix:
AC and DC power supplies in the same chassis
Power supplies with different airflow labels (
(AFO) ) in the same chassis.
Fan modules with different airflow labels (
in the same chassis.
Power supplies and fan modules with different airflow labels (
and
AIR OUT (AFO)
Characteristics of a DC Power Supply on page 171
DC Power Supply Airflow on page 172
N+0 Redundancy Configuration of DC Power Supplies on page 173
N+N Redundancy Configuration of DC Power Supplies on page 174
EX4300 switches support 550 W DC power supply (see

Figure 119: DC Power Supply for an EX4300 Switch

You can install up to two DC power supplies in an EX4300 switch. Power supplies are
installed in the power supply slots labeled
Table 50 on page 172 lists the details of the 550 W DC power supplies used in EX4300
switches.
AIR IN (AFI)
) in the same chassis.
Figure 119 on page
PSU 0 and PSU 1 in the rear panel of the chassis.
Chapter 7: EX4300 Overview
and
AIR IN (AFI) AIR OUT
and
AIR OUT (AFO)
AIR IN (AFI)
171).
)
171