Power System Description; Srx550 High Memory Services Gateway Power Supply; Figure 13: Ac Power Supply - Juniper SRX550 Hardware Manual

CHAPTER 5

Power System Description

SRX550 High Memory Services Gateway Power Supply

Copyright © 2016, Juniper Networks, Inc.
SRX550 High Memory Services Gateway Power Supply on page 41
The SRX550 High Memory Services Gateway uses either one AC or one DC power supply
unit (PSU). The services gateway is equipped with one AC power supply (see
Figure 13 on page 41) for non-power redundancy. A second PSU is optional (sold
separately) for power redundancy.
A second PSU can be used to meet power requirements exceeding the wattage provided
by a single PSU (a nonredundant configuration). The two power supplies, either both AC
or both DC, will load-share and provide power redundancy to the services gateway,
increasing its availability and reliability. If one power supply fails or is removed, the other
power supply redistributes the electrical load without interruption. The services gateway
reassesses the power required to support its configuration and issues errors if the available
power is insufficient. Figure 14 on page 42
CAUTION: Do not mix AC and DC power supplies within the same services
gateway because this can damage the device.
All power supplies are hot-swappable and support single or dual redundant power supply
versions. Each power supply is cooled by the system's fans.

Figure 13: AC Power Supply

shows the DC power supply.
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