Juniper EX2200 Series Installation instructions

EX Series Redundant Power System Hardware
Guide
Modified: 2017-01-05
Copyright © 2017, Juniper Networks, Inc.

Juniper Networks, Inc.
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Copyright © 2016, Juniper Networks, Inc. All rights reserved.
Juniper Networks, Junos, Steel-Belted Radius, NetScreen, and ScreenOS are registered trademarks of Juniper Networks, Inc. in the United
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Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify,
transfer, or otherwise revise this publication without notice.
EX Series Redundant Power System Hardware Guide
Copyright © 2016, Juniper Networks, Inc.
All rights reserved.
The information in this document is current as of the date on the title page.
YEAR 2000 NOTICE
Juniper Networks hardware and software products are Year 2000 compliant. Junos OS has no known time-related limitations through the
year 2038. However, the NTP application is known to have some difficulty in the year 2036.
END USER LICENSE AGREEMENT
The Juniper Networks product that is the subject of this technical documentation consists of (or is intended for use with) Juniper Networks
software. Use of such software is subject to the terms and conditions of the End User License Agreement (“EULA”) posted at
http://www.juniper.net/support/eula.html. By downloading, installing or using such software, you agree to the terms and conditions of
that EULA.
Copyright © 2017, Juniper Networks, Inc.ii

Table of Contents
AbouttheDocumentation............................................xiii
DocumentationandReleaseNotes.................................xiii
Supported Platforms............................................xiii
DocumentationConventions......................................xiii
DocumentationFeedback.........................................xv
RequestingTechnicalSupport.....................................xvi
Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
OpeningaCasewithJTAC.....................................xvi
Part 1 Overview
Chapter1 SystemOverview...................................................3
EX Series Redundant Power System Hardware Overview . . . . . . . . . . . . . . . . . . . . 4
Switch Models and Configurations Supported by the RPS . . . . . . . . . . . . . . . . 4
WhenaSwitch’sPowerSupplyFails.................................5
ComponentsoftheRPS...........................................6
Understanding How Power Priority Is Determined and Set for Switches Connected
to the EX Series Redundant Power System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DefaultRPSPriority...............................................7
Changing the Priority of Switches on an EX Series RPS . . . . . . . . . . . . . . . . . . 7
Physical Description of a Redundant Power System . . . . . . . . . . . . . . . . . . . . . . . . 8
Power Supply Side of a Redundant Power System . . . . . . . . . . . . . . . . . . . . . . 8
Switch Connector Side of a Redundant Power System . . . . . . . . . . . . . . . . . . 9
Chapter 2 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chassis Physical Specifications for the EX Series Redundant Power System . . . . 11
LEDs on an EX Series Redundant Power System . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter3 PowerSupplies....................................................13
Power Supply in an EX Series Redundant Power System . . . . . . . . . . . . . . . . . . . . 13
Power Supply LEDs in an EX Series Redundant Power System . . . . . . . . . . . . . . . 14
Part 2 Site Planning, Preparation, and Specifications
Chapter4 Preparation Overview..............................................17
Site Preparation Checklist for an EX Series Redundant Power System . . . . . . . . . 17
GeneralSiteGuidelines..............................................19
SiteElectricalWiringGuidelines........................................19
RackRequirements.................................................20
Cabinet Requirements...............................................21
Clearance Requirements for Airflow and Hardware Maintenance for an EX Series
RedundantPowerSystem........................................22
iiiCopyright © 2017, Juniper Networks, Inc.

Chapter 5 Power Specifications and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Power Specifications for the EX Series Redundant Power System . . . . . . . . . . . . 25
AC Power Cord Specifications for the EX Series Redundant Power System . . . . . 25
Part 3 Initial Installation and Configuration
Chapter6 UnpackingtheRPS................................................31
Unpacking an EX Series Redundant Power System . . . . . . . . . . . . . . . . . . . . . . . . 31
Parts Inventory (Packing List) for an EX Series Redundant Power System . . . . . . 32
Chapter7 InstallingtheRPS.................................................33
Mounting the EX Series Redundant Power System . . . . . . . . . . . . . . . . . . . . . . . . 33
Mounting an EX Series Redundant Power System in a Recessed Position in a
RackorCabinet.................................................34
Mounting an EX Series Redundant Power System on Four Posts in a Rack or
Cabinet .......................................................34
Mounting an EX Series Redundant Power System on Two Posts in a Rack or
Cabinet .......................................................38
Chapter8 ConnectingtheRPS...............................................41
Connecting Power to an EX Series Redundant Power System Power Supply . . . . 41
Connecting the EX Series Redundant Power System to an EX2200 or EX3300
Switch ........................................................43
Chapter 9 Performing Initial Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Determining and Setting Priority for Switches Connected to an EX Series
RPS ..........................................................47
UsingRPSDefaultConfiguration...................................48
Setting the EX Series RPS Priority for a Switch (CLI) . . . . . . . . . . . . . . . . . . . 48
Part 4 Installing, Maintaining, and Replacing Components
Chapter10 ReplacingPowerSupply...........................................53
Installing a Power Supply in the EX Series Redundant Power System . . . . . . . . . 53
Removing a Power Supply from the EX Series RPS . . . . . . . . . . . . . . . . . . . . . . . . 54
Chapter11 RoutineMaintenance..............................................57
Upgrading Firmware on an EX Series Redundant Power System . . . . . . . . . . . . . . 57
Determine the Current EX Series RPS Firmware Version . . . . . . . . . . . . . . . . . 57
Connect the Supplied Cable from the EX Series RPS to the Network . . . . . . 58
Use an Attached Switch’s CLI to Upgrade EX Series RPS Firmware . . . . . . . 58
Example: Upgrading EX Series RPS Firmware Using an EX2200 Switch . . . . 59
Example: Upgrading EX Series RPS Firmware From an EX3300 Switch . . . . 60
Copyright © 2017, Juniper Networks, Inc.iv
EX Series Redundant Power System Hardware Guide

Chapter 12 Contacting Customer Support and Returning the Chassis or
Components......................................................61
Returning an EX Series RPS or RPS Component for Repair or Replacement . . . . . 61
Locating the Serial Number on an EX Series Redundant Power System or
Redundant Power System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Listing the EX Series Redundant Power System Details with a Switch
CLI .......................................................62
Locating the Chassis Serial Number ID Label on an EX Series RPS . . . . . . . . 62
Locating the Serial Number ID Labels on a Power Supply in an EX Series
RedundantPowerSystem.....................................62
Contacting Customer Support to Obtain Return Material Authorization . . . . . . . 63
Packing an EX Series Redundant Power System or Redundant Power System
ComponentsforShipping........................................63
Packing an EX Series RPS for Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Packing an EX Series RPS Component for Shipping . . . . . . . . . . . . . . . . . . . . 65
Part 5 Troubleshooting
Chapter13 Troubleshooting Procedures .......................................69
Troubleshooting the EX Series Redundant Power System Power On and Power
BackupIssues..................................................69
The EX Series RPS Is Not Powering On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
A Switch Is Not Recognized by the RPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
An Error Message Indicates That an RPS Power Supply is Not
Supported .................................................70
The EX Series Redundant Power System Is Not Providing Power Backup to
aConnectedSwitch..........................................70
The Wrong Switches Are Being Backed Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Six Switches That Do Not Require PoE Are Not All Being Backed Up . . . . . . . 71
Chapter14 AlarmsandSyslogMessages.......................................73
Understanding Alarm Types and Severity Levels on EX Series Switches . . . . . . . . 73
Checking Active Alarms with the J-Web Interface . . . . . . . . . . . . . . . . . . . . . . . . . 74
MonitoringSystemLogMessages......................................75
Part 6 Configuration Statements and Operational Commands
Chapter15 ConfigurationStatements..........................................81
[edit redundant-power-system] Configuration Statement Hierarchy on EX Series
Switches.......................................................81
Supported Statements in the [edit redundant-power-system] Hierarchy
Level ......................................................81
Unsupported Statements in the [edit redundant-power-system] Hierarchy
Level......................................................82
member(RedundantPowerSystem)...................................82
priority(RedundantPowerSystem)....................................83
redundant-power-system............................................84
vCopyright © 2017, Juniper Networks, Inc.
Table of Contents

Chapter16 Operational Commands ...........................................85
request redundant-power-system multi-backup . . . . . . . . . . . . . . . . . . . . . . . . . 86
show chassis redundant-power-system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
showredundant-power-systemled....................................89
show redundant-power-system multi-backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
show redundant-power-system network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
show redundant-power-system power-supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
show redundant-power-system status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
show redundant-power-system upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
show redundant-power-system version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Part 7 Safety and Compliance Information
Chapter 17 General Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
General Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Definitions of Safety Warning Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
QualifiedPersonnelWarning.........................................106
Warning Statement for Norway and Sweden . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Chapter18 FireSafetyRequirements.........................................109
FireSafetyRequirements............................................109
Chapter 19 Installation and Maintenance Safety Information . . . . . . . . . . . . . . . . . . . . . 111
InstallationInstructionsWarning.......................................111
ChassisLiftingGuidelines............................................112
RestrictedAccessWarning...........................................112
RampWarning.....................................................114
Rack-Mounting and Cabinet-Mounting Warnings . . . . . . . . . . . . . . . . . . . . . . . . . 114
GroundedEquipmentWarning........................................118
Maintenance and Operational Safety Guidelines and Warnings . . . . . . . . . . . . . . 119
BatteryHandlingWarning........................................119
JewelryRemovalWarning........................................120
LightningActivityWarning........................................121
OperatingTemperatureWarning...................................122
ProductDisposalWarning........................................123
Chapter 20 Power and Electrical Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
General Electrical Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . 125
Action to Take After an Electrical Accident . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Prevention of Electrostatic Discharge Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
AC Power Electrical Safety Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
ACPowerDisconnectionWarning.....................................129
Multiple Power Supplies Disconnection Warning . . . . . . . . . . . . . . . . . . . . . . . . . 130
TNPowerWarning.................................................130
Chapter 21 Agency Approvals and Compliance Statements . . . . . . . . . . . . . . . . . . . . . . 133
Agency Approvals for EX Series Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Compliance Statements for EMC Requirements for EX Series Switches . . . . . . . 134
Canada.......................................................134
EuropeanCommunity...........................................135
Copyright © 2017, Juniper Networks, Inc.vi
EX Series Redundant Power System Hardware Guide

Israel.........................................................135
Japan ........................................................135
Korea ........................................................136
UnitedStates..................................................136
FCCPart15Statement..........................................136
Nonregulatory Environmental Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Compliance Statements for Acoustic Noise for EX Series Switches . . . . . . . . . . 138
viiCopyright © 2017, Juniper Networks, Inc.
Table of Contents

Copyright © 2017, Juniper Networks, Inc.viii
EX Series Redundant Power System Hardware Guide

List of Figures
Part 1 Overview
Chapter1 SystemOverview...................................................3
Figure 1: Default PoE Switch Priority Is Determined by Connector Port
Location........................................................7
Figure 2: Switch Priority After CLI Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure3:PowerSupplySideoftheRPS..................................9
Figure 4: Switch Connector Side of the RPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 2 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure5:LEDsonanRPS.............................................12
Chapter3 PowerSupplies....................................................13
Figure 6: EX-PWR3-930-AC Power Supply in a Redundant Power System . . . . . 14
Part 2 Site Planning, Preparation, and Specifications
Chapter4 Preparation Overview ..............................................17
Figure 7: Clearance Requirements for Airflow and Hardware Maintenance for an
RPS ..........................................................22
Chapter 5 Power Specifications and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure8:ACPlugTypes..............................................27
Part 3 Initial Installation and Configuration
Chapter7 InstallingtheRPS.................................................33
Figure 9: Attaching the Front Bracket to the Side-Rail Bracket . . . . . . . . . . . . . . . 36
Figure 10: Attaching the Side-Rail Bracket to the Chassis . . . . . . . . . . . . . . . . . . . 36
Figure 11: Mounting the RPS to the Front Posts of a Rack . . . . . . . . . . . . . . . . . . . . 37
Figure 12: Sliding the Rear Brackets to the Rear of a Four-Post Rack . . . . . . . . . . . 37
Figure 13: Attaching the Mounting Bracket to the Side Panel of the RPS . . . . . . . 39
Figure 14: Mounting the RPS on Two Posts in a Rack . . . . . . . . . . . . . . . . . . . . . . . 40
Chapter8 ConnectingtheRPS...............................................41
Figure 15: Each Power Supply Must Be Plugged In . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure16:RPSCable................................................44
Figure 17: Connect the RPS Cable to the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Part 4 Installing, Maintaining, and Replacing Components
Chapter10 ReplacingPowerSupply...........................................53
Figure 18: Installing a Power Supply in the RPS . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
ixCopyright © 2017, Juniper Networks, Inc.

Figure19:RemovingaPowerSupply....................................56
Chapter11 RoutineMaintenance..............................................57
Figure 20: Connecting the RJ-45 Cable for a Firmware Upgrade . . . . . . . . . . . . . . 58
Part 7 Safety and Compliance Information
Chapter 20 Power and Electrical Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Figure 21: Placing a Component into an Antistatic Bag . . . . . . . . . . . . . . . . . . . . . 128
Copyright © 2017, Juniper Networks, Inc.x
EX Series Redundant Power System Hardware Guide

List of Tables
AbouttheDocumentation.........................................xiii
Table1:NoticeIcons.................................................xiv
Table 2: Text and Syntax Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
Part 1 Overview
Chapter1 SystemOverview...................................................3
Table 3: Sample Requirements and RPS Solutions . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 4: Redundant Power System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 2 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 5: Physical Specifications of the RPS Chassis . . . . . . . . . . . . . . . . . . . . . . . . 11
Table6:LEDsonanRPS..............................................12
Chapter3 PowerSupplies....................................................13
Table 7: Power Supply LEDs in a Redundant Power System . . . . . . . . . . . . . . . . . . 14
Part 2 Site Planning, Preparation, and Specifications
Chapter4 Preparation Overview ..............................................17
Table8:SitePreparationChecklist......................................17
Table 9: Site Electrical Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 10: Rack Requirements and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 11: Cabinet Requirements and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 5 Power Specifications and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 12: AC Power Supply Electrical Specifications for an RPS Power
Supply ........................................................25
Table 13: AC Power Cord Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Part 3 Initial Installation and Configuration
Chapter6 UnpackingtheRPS................................................31
Table 14: Inventory of Components Provided with the RPS . . . . . . . . . . . . . . . . . . 32
Part 5 Troubleshooting
Chapter14 AlarmsandSyslogMessages.......................................73
Table15:AlarmTerms...............................................73
Table 16: Summary of Key Alarm Output Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 17: Filtering System Log Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Table 18: Viewing System Log Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
xiCopyright © 2017, Juniper Networks, Inc.

Part 6 Configuration Statements and Operational Commands
Chapter16 Operational Commands ...........................................85
Table 19: show chassis redundant-power-system Output Fields . . . . . . . . . . . . . 87
Table 20: show redundant-power-system led Output Fields . . . . . . . . . . . . . . . . 89
Table 21: show redundant-power-system power-supply Output Fields . . . . . . . . 93
Table 22: show redundant-power-system status Output Fields . . . . . . . . . . . . . . 95
Table 23: show redundant-power-system upgrade Output Fields . . . . . . . . . . . . 97
Table 24: show redundant-power-system version Output Fields . . . . . . . . . . . . . 98
Copyright © 2017, Juniper Networks, Inc.xii
EX Series Redundant Power System Hardware Guide

About the Documentation
•Documentation and Release Notes on page xiii
•Supported Platforms on page xiii
•Documentation Conventions on page xiii
•Documentation Feedback on page xv
•Requesting Technical Support on page xvi
Documentation and Release Notes
To obtain the most current version of all Juniper Networks®technical documentation,
see the product documentation page on the Juniper Networks website at
http://www.juniper.net/techpubs/.
If the information in the latest release notes differs from the information in the
documentation, follow the product Release Notes.
Juniper Networks Books publishes books by Juniper Networks engineers and subject
matter experts. These books go beyond the technical documentation to explore the
nuances of network architecture, deployment, and administration. The current list can
be viewed at http://www.juniper.net/books.
Supported Platforms
For the features described in this document, the following platforms are supported:
•EX Series
Documentation Conventions
Table 1 on page xiv defines notice icons used in this guide.
xiiiCopyright © 2017, Juniper Networks, Inc.

Table 1: Notice Icons
DescriptionMeaningIcon
Indicates important features or instructions.Informational note
Indicates a situation that might result in loss of data or hardware damage.Caution
Alerts you to the risk of personal injury or death.Warning
Alerts you to the risk of personal injury from a laser.Laser warning
Indicates helpful information.Tip
Alerts you to a recommended use or implementation.Best practice
Table 2 on page xiv defines the text and syntax conventions used in this guide.
Table 2: Text and Syntax Conventions
ExamplesDescriptionConvention
To enter configuration mode, type the
configure command:
user@host> configure
Represents text that you type.Bold text like this
user@host> show chassis alarms
No alarms currently active
Represents output that appears on the
terminal screen.
Fixed-width text like this
•A policy term is a named structure
that defines match conditions and
actions.
•Junos OS CLI User Guide
•RFC 1997, BGP Communities Attribute
•Introduces or emphasizes important
new terms.
•Identifies guide names.
•Identifies RFC and Internet draft titles.
Italic text like this
Configure the machine’s domain name:
[edit]
root@# set system domain-name
domain-name
Represents variables (options for which
you substitute a value) in commands or
configuration statements.
Italic text like this
Copyright © 2017, Juniper Networks, Inc.xiv
EX Series Redundant Power System Hardware Guide

Table 2: Text and Syntax Conventions (continued)
ExamplesDescriptionConvention
•To configure a stub area, include the
stub statement at the [edit protocols
ospf area area-id] hierarchy level.
•The console port is labeled CONSOLE.
Represents names of configuration
statements, commands, files, and
directories; configuration hierarchy levels;
or labels on routing platform
components.
Text like this
stub <default-metric metric>;Encloses optional keywords or variables.< > (angle brackets)
broadcast | multicast
(string1 |string2 |string3)
Indicates a choice between the mutually
exclusive keywords or variables on either
side of the symbol. The set of choices is
often enclosed in parentheses for clarity.
| (pipe symbol)
rsvp { # Required for dynamic MPLS onlyIndicates a comment specified on the
same line as the configuration statement
to which it applies.
# (pound sign)
community name members [
community-ids ]
Encloses a variable for which you can
substitute one or more values.
[ ] (square brackets)
[edit]
routing-options {
static {
route default {
nexthop address;
retain;
}
}
}
Identifies a level in the configuration
hierarchy.
Indention and braces ( { } )
Identifies a leaf statement at a
configuration hierarchy level.
; (semicolon)
GUI Conventions
•In the Logical Interfaces box, select
All Interfaces.
•To cancel the configuration, click
Cancel.
Represents graphical user interface (GUI)
items you click or select.
Bold text like this
In the configuration editor hierarchy,
select Protocols>Ospf.
Separates levels in a hierarchy of menu
selections.
>(bold right angle bracket)
Documentation Feedback
We encourage you to provide feedback, comments, and suggestions so that we can
improve the documentation. You can provide feedback by using either of the following
methods:
•Online feedback rating system—On any page of the Juniper Networks TechLibrary site
at http://www.juniper.net/techpubs/index.html, simply click the stars to rate the content,
and use the pop-up form to provide us with information about your experience.
Alternately, you can use the online feedback form at
http://www.juniper.net/techpubs/feedback/.
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About the Documentation

•E-mail—Send your comments to [e-mail]. Include the document
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Requesting Technical Support
Technical product support is available through the Juniper Networks Technical Assistance
Center (JTAC). If you are a customer with an active J-Care or Partner Support Service
support contract, or are covered under warranty, and need post-sales technical support,
you can access our tools and resources online or open a case with JTAC.
•JTAC policies—For a complete understanding of our JTAC procedures and policies,
review the JTAC User Guide located at
http://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf.
•Product warranties—For product warranty information, visit
http://www.juniper.net/support/warranty/.
•JTAC hours of operation—The JTAC centers have resources available 24 hours a day,
7 days a week, 365 days a year.
Self-Help Online Tools and Resources
For quick and easy problem resolution, Juniper Networks has designed an online
self-service portal called the Customer Support Center (CSC) that provides you with the
following features:
•Find CSC offerings: http://www.juniper.net/customers/support/
•Search for known bugs: http://www2.juniper.net/kb/
•Find product documentation: http://www.juniper.net/techpubs/
•Find solutions and answer questions using our Knowledge Base: http://kb.juniper.net/
•Download the latest versions of software and review release notes:
http://www.juniper.net/customers/csc/software/
•Search technical bulletins for relevant hardware and software notifications:
http://kb.juniper.net/InfoCenter/
•Join and participate in the Juniper Networks Community Forum:
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•Open a case online in the CSC Case Management tool: http://www.juniper.net/cm/
To verify service entitlement by product serial number, use our Serial Number Entitlement
(SNE) Tool: https://tools.juniper.net/SerialNumberEntitlementSearch/
Opening a Case with JTAC
You can open a case with JTAC on the Web or by telephone.
•Use the Case Management tool in the CSC at http://www.juniper.net/cm/.
•Call 1-888-314-JTAC (1-888-314-5822 toll-free in the USA, Canada, and Mexico).
Copyright © 2017, Juniper Networks, Inc.xvi
EX Series Redundant Power System Hardware Guide

For international or direct-dial options in countries without toll-free numbers, see
http://www.juniper.net/support/requesting-support.html.
xviiCopyright © 2017, Juniper Networks, Inc.
About the Documentation

Copyright © 2017, Juniper Networks, Inc.xviii
EX Series Redundant Power System Hardware Guide

PART 1
Overview
•System Overview on page 3
•Chassis Components and Descriptions on page 11
•Power Supplies on page 13
1Copyright © 2017, Juniper Networks, Inc.

Copyright © 2017, Juniper Networks, Inc.2
EX Series Redundant Power System Hardware Guide