Juniper QFX5110 Series - Characteristics of a DC Power Supply

NOTE: EX4300-24T, EX4300-24P, EX4300-32F, EX4300-48T, EX4300-48T-AFI, EX4300-48P,
EX4300-48MP, and EX4300-48MP-S models do not support DC power. EX4300-24T-S,
EX4300-24P-S, EX4300-32F-S, EX4300-32F-DC, EX4300-48T-S, EX4300-48T-DC,
EX4300-48T-DC-AFI, and EX4300-48P-S models support DC power.
All the EX4300 switches that are powered by DC power supplies except EX4300-24T-S, EX4300-24P-S,
EX4300-32F-S, EX4300-48T-S, and EX4300-48P-S switches are 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 (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.
•
Power supplies and fan modules with different airflow labels (AIR IN (AFI) and AIR
OUT (AFO)) in the same chassis.
Characteristics of a DC Power Supply
EX4300 switches support 550 W DC power supply (see Figure 60 on page 185).
Figure 60: 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 PSU 0 and PSU 1 in the rear panel of the chassis.
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