Figure 25: Dc Power Supply - Juniper QFX10008 Hardware Manual

QFX10008 Switch Hardware Guide
60
NOTE: DC power supplies are shipped only in the redundant configuration
of QFX10000 switches. For details about different chassis configurations,
see "QFX10008 Configurations" on page 31
Configurations.
Each DC power supply weighs approximately 6 lb (2.7 kg) and has two independent pairs
of DC input lugs (
Input 1, RTN, –48V/–60V
of the power supply. Each inlet requires a dedicated DC power feed. Although each inlet
provides sufficient input power to provide full output, always connect to a dedicated DC
power feed to provide redundancy. Only one power feed is operational at a time.
DC power models employ electronic A-B input selection. It provides 2N source redundancy
and N+1 power supply redundancy using fewer power supplies than you would require
in a 2N configuration. Should one power source fail, electronic A-B input selection switches
the power supply to the alternate source.
Each DC power supply has a power switch with international markings for on (
( ), a fan, and four LEDs on the faceplate that indicate the status of the power supply.
O
See Figure 25 on page 60.

Figure 25: DC Power Supply

NOTE: The DC power supply requires a dedicated circuit breaker for each
input DC feed. The chosen breaker should be sized to deliver 60 A of input
current.
and QFX10016 Components and
and
Input 2, RTN, –48V/–60V
Copyright © 2019, Juniper Networks, Inc.
) on the faceplate
| ) and off