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Allied Telesyn, Inc.

Visit our web site at: www.alliedtelesyn.com

Overview

AT-8400 blank faceplates are designed to maintain optimal, trouble-free 
environmental conditions for the AT-8400 chassis. This installation guide 
provides instructions for installing both the line card blank faceplate and 
the power supply blank faceplate.

The AT-8400 chassis requires a blank faceplate installed in every chassis slot 
that is not occupied by an Ethernet line card. The blank faceplate (see 
Figure 1) keeps dust from getting into the switch and maintains proper 
airflow throughout the chassis. 

Figure 1.  

Line Card Blank Faceplate

The AT-8400 chassis also requires a blank faceplate installed in any power 
supply slot not occupied by a power supply. The power supply blank 
faceplate (see Figure 2) ensures proper cooling and ventilation of the 
AT-8400 chassis.

Figure 2.  

Power Supply Blank Faceplate

Related Documents

For complete details regarding the features, functions, and installation 
instructions for the AT-8400 Chassis, refer to the 

AT-8400 Series Switch 

Reference Guide (

part number 613-50399-00) which is available from the 

Allied Telesyn web site at www.alliedtelesyn.com. 

Package Contents

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

Three AT-8400 line card blank faceplates

One AT-8400 power supply blank faceplate

Installation Guide

Installing the AT-8400 Line Card Blank Faceplate

You can install an AT-8400 line card blank faceplate whether the chassis is 
powered on or powered off.

Caution

Before installing an AT-8400 blank faceplate, refer to the 

AT-8400 

Series Switch Reference Guide

 for electrical safety information.

To install an AT-8400 line card blank faceplate, perform the following 
procedure:

1.

Select the slot in the AT-8400 chassis where you need to install a blank 
faceplate. You can install the faceplate in any slot marked 1 through 12.

Caution

Do not install a blank faceplate in Slot M. Slot M is reserved for the 
AT-8401 Management Fabric Card.

2.

Unpack a blank faceplate from the shipping package, and store any 
unused blank faceplates in a safe location.

Caution

Observe all standard electrostatic discharge (ESD) precautions, such 
as wearing an antistatic wrist strap, to avoid damaging the chassis 
device. Line cards can be damaged by static electricity.

3.

Verify that the blank faceplate package includes all the items previously 
listed in “Package Contents” on page 2. If any item is missing or 
damaged, contact your Allied Telesyn sales representative for 
assistance.

4.

Align the edge of the blank faceplate with the top and bottom guide 
rails before carefully sliding the faceplate into the slot, as shown in 
Figure 3. Slide the faceplate forward into the slot until the faceplate is 
flush with the front of the chassis.

Figure 3.  

Insertion of Line Card Blank Faceplate

5.

Secure the blank faceplate to the chassis by using a Phillips screwdriver 
to tighten the two installation screws on the faceplate.

   Note

Always tighten the installation screws to secure the blank faceplate to 
the switch chassis. Leaving a faceplate partially seated can still allow 
dust to enter the chassis and disrupt the normal air flow.

You have completed the line card blank faceplate installation procedure.

AT-8400

Modular Sw

itch S

ystem

2

3

4

5

1

AT-8411

PWR

EJECT

LNK

10

ACT
100

AT-84

11

PWR

EJECT

LNK

10

ACT
100

AT-84

11

PWR

EJECT

LNK

10

ACT
100

AT-84

11

PWR

EJECT

LNK

10

ACT
100

AT-8400 Line Card and Power Supply

Blank Faceplate

Installation Guide

For use with the AT-8400 Chassis

PN 613-50540-00 Rev A 

1

2

3

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