Dc Power Supply Configurations; Dc Power Supply Leds In An Ex9214 Switch - Juniper EX9214 Hardware Manual

DC Power Supply Configurations

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DC Power Supply LEDs in an EX9214 Switch

Copyright © 2015, Juniper Networks, Inc.
Code and customer site internal standards to maintain proper level of protection for the
current specified above or each DC power supply rated for at least 125% of the continuous
current that the system draws at –40 VDC.
You can provide one or two feeds to the power supply. If you are using the power supply
in one-feed mode, you must connect the power cord into the AC appliance inlet located
on the chassis above the power supply. This is the recommended inlet when using the
power supply in one-feed mode. If you are using the power supply in two-feed mode,
you must connect another power cord into the AC appliance inlet on the power supply
faceplate also.
EX9214 switches support four DC power supplies, installed vertically at the rear of the
chassis in slots PEM0 through
and provide power to the lower fan tray, line card slots
PEM0 PEM2
slots and ; power supplies in slots
1 2
line card slots 0 through 5
each zone.
Four power supplies provide full redundancy. If a power supply in a redundant
configuration is removed or fails, its redundant power supply takes over without
interruption. The power supply in
supply in slot and the power supply in
PEM0
the power supply in slot
PEM1
DC Power Supply Specifications for EX9214 Switches on page 81
DC Power Supply LEDs in an EX9214 Switch on page 45
Power Requirements for EX9200 Switch Components on page 77
Installing a DC Power Supply in an EX9214 Switch on page 185
Removing a DC Power Supply from an EX9214 Switch on page 188
A DC power supply has three LEDs on its faceplate:
LEDs. These LEDs display information about the status of the DC power supply. There
are two LEDs on the craft interface that also display the power supply status. In addition,
a power supply failure triggers the major alarm LED on the craft interface.
NOTE: A host subsystem must be installed for the
Table 20 on page 46 describes the LEDs on a DC power supply in EX9214 switches.
PEM3 (left to right), in two zones: power supplies in slots
and
PEM1 PEM3
, and SF slot 0 . There must be at least one power supply in
serves as redundant power supply to the power
PEM2
serves as redundant power supply to
PEM3
.
POWER OK
Chapter 4: Power Supplies
through
6 11
provide power to the upper fan tray,
, , and
BRKR ON INPUT OK
LED to be on.
POWER OK
, and SF
45