Power System Description; Srx550 Services Gateway Power Supply; Figure 10: Ac Power Supply - Juniper SRX550 Hardware Manual

CHAPTER 6

Power System Description

SRX550 Services Gateway Power Supply

Copyright © 2015, Juniper Networks, Inc.
SRX550 Services Gateway Power Supply on page 29
The SRX550 Services Gateway uses either one AC or one DC power supply unit (PSU).
The services gateway is equipped with one AC power supply (see
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.
of the DC power supply.
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 10: AC Power Supply

Figure 10 on page
Figure 11 on page 30 shows the diagram
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