Replacing Power Supply; Replacing Redundant Ac Power Supplies In An Ex4500 Switch Without Disrupting Switch Functions - Juniper EX4500 Hardware Manual

CHAPTER 18

Replacing Power Supply

Replacing Redundant AC Power Supplies in an EX4500 Switch Without Disrupting
Switch Functions
Copyright © 2017, Juniper Networks, Inc.
Replacing Redundant AC Power Supplies in an EX4500 Switch Without Disrupting
Switch Functions on page 179
Installing an AC Power Supply in an EX4500 Switch on page 184
Removing an AC Power Supply from an EX4500 Switch on page 185
Installing a DC Power Supply in an EX4500 Switch on page 187
Removing a DC Power Supply from an EX4500 Switch on page 189
The power supplies in an EX4500 switch are field-replaceable units (FRUs) and are
designed to be hot-swapped while the switch is operating. You can remove and replace
the power supply in the top slot and the power supply in the bottom slot, one at a time,
without disrupting switch functions.
Before replacing the power supplies in the switch:
Ensure that you have the correct replacement power supplies for your EX4500 switch
model. The color of the ejector lever on each power supply must match the color of
the labels visible through the fan tray vents.
Orange for Intake—The back-to-front model has an orange ejector lever on the power
supplies and an orange INTAKE label visible through the fan tray vents.
Green for Exhaust—The front-to-back model has a green ejector lever on the power
supplies and a green EXHAUST label visible through the fan tray vents.
CAUTION:
cause the chassis to overheat.
Ensure that you understand how to prevent electrostatic discharge (ESD) damage
(see "Prevention of Electrostatic Discharge Damage" on page
If a grounding strap is not available, take these equivalent precautions:
Before removing a component, touch the exposed, bare metal of the switch to ground
yourself before handling the component.
Operating the switch with an incorrect power supply might
281).
179