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Overview

The AT-PWR11 is an DC redundant power supply for the AT-8400 Series switch. 
When installed, the unit operates in a standby mode. If the standard power supply 
fails or loses power, the AT-PWR11 unit changes from standby to active and 
provides all power to the system to prevent a network failure.

Note

The power supply is hot-swappable. You can install it without powering off 
the chassis.

AT-PWR11

DC

P

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F

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WARNING

BEFORE

EJECTING,

LOOSEN

THUMBSCREW

!

Related Documents

The Allied Telesyn web site at www.alliedtelesyn.com contains the most recent 
documentation, software, and technical information on all of our products. For 
details on the features and functions of your Allied Telesyn AT-8400 Chassis and 
line cards, refer to the following manuals from our web site: 

AT-8400 Series Switch Reference Guide

PN 613-50399-00

AT-S60 Management Software User’s Guide

PN 613-50400-00

AT-S60 Command Line User’s Guide

PN 613-50401-00

Package Contents

Make sure the following items are included in the shipping package. If any item is 
missing or damaged, contact your Allied Telesyn sales representative for 
assistance.

One AT-PWR11 Redundant Power Supply (DC)

Installation Guide

Warranty Card

Note

If you are replacing a failed power supply, refer to the 

AT-8400 Series Switch 

Reference Guide

 for instructions on how to remove a power supply from a 

chassis.

Installing the AT-PWR11 Power Supply

Before installing a power supply, please note the following:

Refer to the 

AT-8400 Series Switch Reference Guide 

for

 

electrical safety and 

emission information.

The AT-PWR11 unit must be installed in a DC powered AT-8400 Chassis. 
This type of chassis has two DC terminal blocks on the back panel.

There may be several different models of DC power supplies. Each model 
is rated for a different power load. Both power supplies in an AT-8400 
chassis must be of the same model type. Do not mix power supplies with 
different power ratings in the same chassis.

To install the AT-PWR11, follow these steps:

1.

Using a Phillips screwdriver, loosen the two captive screws that secure the 
power supply cover to the chassis and remove the cover from the chassis. The 
cover is removed by angling it from the bottom as you slide it down and out of 
the chassis.

2.

Using a Phillips screwdriver, loosen the captive screw that secures the cover 
over the power supply PWR B slot and slide the cover from the chassis.

Note

Store the cover in a safe place. You should reinstall it if you ever remove a 
power supply from the chassis without installing a new one. 

3.

Place the locking levers on the new AT-PWR11 unit in the released position.

1

AT-84

11

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AT-8411

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ACT
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AT-PW

R11

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AT-PW

R10

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AT-8411

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LNK

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100

2

3

AT-84

11

TX

EJECT

LNK

10

ACT
100

AT-84

11

TX

EJECT

LNK

10

ACT
100

WARN

ING

BEFO

RE

EJE

CTING

,

LOOSEN

THUM

BSCR

EW

!

AT-PWR11

DC

P

O

W
E
R

F

A
U
L
T

WAR

NING

BEFORE

EJECTING,

LOOSEN

THUMBSCREW

!

AT-PWR11

Redundant Power Supply (DC)

Installation Guide

Allied Telesyn, Inc.

960 Stewart Drive, Suite B
Sunnyvale, CA 94085 USA

Tel 1 (408) 730-0950 • Fax 1 (408) 736-0100

Visit our web site at: www.alliedtelesyn.com

PN 613-50396-00 Rev B

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