3COM DUA1800-0AAA04 User Manual

INKBUILDER

MSH

HASSIS

SER

UIDE

Part No. DUA1800-0AAA04 Published September 1994

3Com Corporation ■ 5400 Bayfront Plaza ■ Santa Clara, California ■ 95052-8154

form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Ireland.

3Com Ireland reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Ireland to provide notification of such revision or change.

3Com Ireland provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following restricted rights:

For units of the Department of Defense:

Restricted Rights Legend: Use, duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) for restricted Rights in Technical Data and Computer Software clause at 48 C.F.R. 52.227-7013. 3Com Ireland, c/o 3Com Limited, Isolan House, Brindley Way, Hemel Hempstead, Hertfordshire, HP3 9XJ, UK.

For civilian agencies: Restricted Rights Legend: Use, reproduction or disclosure is subject to restrictions set forth in subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and the limitations set forth in 3Com’s standard commercial agreement for the software. Unpublished rights reserved under the copyright laws of the United States.

3Com, CardFacts, LinkBuilder and RingBuilder are registered trademarks of 3Com Corporation. Registered trademarks are registered in the United States, and may or may not be registered in other countries.

LinkSwitch, FMS, MSH, and Transcend are trademarks of 3Com Corporation. 3ComFacts, Ask 3Com, NetFacts, and CardBoard are service marks of 3Com Corporation.

CompuServe is a registered trademark of CompuServe, Inc. Other brand and product names may be registered trademarks or trademarks of their respective

holders.

ONTENTS

BOUT THIS GUIDE

About This Guide ix A Word About Safety ix Special Messages x How to Use This Guide x

HAT IS THE LINKBUILDER

The LinkBuilder MSH 1-1 The Chassis 1-4

The Backplane 1-5 The Modules 1-8 Power Supply Units (PSU) 1-8 The Display Panel 1-9 The Thermal Management Unit (TMU) 1-10 The Cable Support Tray 1-10 Management Of The LinkBuilder MSH 1-11

NSTALLING THE LINKBUILDER

Introduction 2-1

A Suitable Site For Installation 2-2

Installing The Chassis 2-2

Installation Into A 19 Inch Rack 2-4

The Locking Bar 2-5 Assembling The LinkBuilder MSH 2-6 Safety Information 2-6 The Power Supply Unit And Power Inlet Panel 2-8

Installing The Power Supply Unit 2-9

Removing The Power Supply Unit 2-12 The Display Panel 2-15

Removing The Display Panel 2-15 The Thermal Management Unit 2-17

MSH?

MSH

The Cable Support Tray 2-20

Completing The Installation 2-23

Network Cabling 2-23 Power-up The LinkBuilder MSH 2-23

Storing The User Guides 2-24

NSTALLING MODULES INTO THE

Introduction 3-1

Ethernet Modules 3-2 Token Ring Modules 3-10

FDDI Modules 3-13 Handling Modules 3-15 Before You Begin 3-16

Blanking Plates 3-16

Choosing Slots For Modules 3-17 LinkBuilder MSH Modules 3-17

Installing/Removing A Module 3-18

Removing A Module 3-20 LinkBuilder ECS Modules 3-21

Installing/Removing LinkBuilder ECS Modules 3-21

SING THE DISPLAY PANEL

The Display Panel 4-1 The LEDs 4-4

Tes ti ng LE Ds 4- 5 Resetting The LinkBuilder MSH 4-6 Management 4-6

The Four-button Keypad 4-6

The RS232 Serial Port 4-7

The Network Manager 4-7

MSH C

HASSIS

ROBLEM SOLVING

Introduction 5-1

Spares 5-2 Spot Checks 5-2

Cleaning 5-3

Removing And Replacing Equipment 5-3

Fault Diagnosis Using The LEDs 5-4 Obtaining Help 5-5

TANDARDS USED IN THE DESIGN

Standards and Approvals A-1

Safety A-1 Environmental A-1 Electromagnetic Compatability A-1 Functional A-2 BABT Approval A-2

ECHNICAL SPECIFICATION

MSH Chassis - 3C18000 and 3C18001 B-1 Display Panel - 3C18006 B-2 375W Power Supply Unit - 3C18011 B-2 525W Power Supply Unit - 3C18012 B-3 Thermal Management Unit - 3C18005 B-3 ECS - MSH Module Converter - 3C18082 B-4 Miscellaneous B-4

Weight of blanking panels B-4

MSH P

Calculating Power Consumption C-1

OWER CONSUMPTION LIMITS

PIN AND C

Ethernet RJ45 - Pin Assignments D-1 Ethernet Telco - Pin Assignments D-2 Token Ring RJ45 - Pin Assignments D-4 Ring-In and Ring-Out Pin Assignments D-4 RS232 Serial Port - Pin Assignments D-5 Status Input Connector D-5

RDERING INFORMATION

Product Numbers E-1

Chassis Components E-1

IRCUIT ASSIGNMENTS

Ethernet Products E-2

Token Ring Products E-3

FDDI Products E-3 Suppliers E-4

ECHNICAL SUPPORT

On-line Technical Services F-1

3Com Bulletin Board Service (3ComBBS) F-1

Ask3Com on CompuServe F-2

3ComFacts Automated Fax Service F-2 3Com Documentation on CD-ROM F-3 Support from Your Network Supplier F-4 Support from 3Com F-4 Returning Products for Repair F-5

NDEX

ADIO FREQUENCY INTERFERENCE STATEMENTS

FCC Statement 1 CSA Statement 1 Information To The User 1

IMITED WARRANTY

BOUT THIS

About This Guide

This guide is intended for use only by the following:

■ the Network Administrator responsible for the management and

maintenance of the network.

■ the installation engineer responsible for installing hardware.

This guide contains all the information you need to set up the LinkBuilder MSH (Multi-Services Hub) and describes how:

■ the MSH works

■ to install the chassis, its ancillary components and modules

■ to identify problems and possible solutions to these problems.

UIDE

A Word About Safety

Please pay careful attention to the Warning and Safety Information panels that appear throughout this user guide. These panels give information that will protect you and the MSH equipment.

They are always accompanied by this symbol:

x A

BOUT THIS GUIDE

Special Messages

A special format indicates notes, cautions, and warnings. These messages are defined as follows.

Notes call attention to important features or instructions.

CAUTION:

Cautions contain directions that you must follow to

avoid immediate system damage or loss of data.

WARNING:

Warnings contain directions that you must follow for

your personal safety. Follow all instructions carefully.

Throughout this guide,

are used to denote new terms or

italics

emphasis.

How to Use This Guide

The following list shows where to find specific information. Refer to the documentation roadmap in the front of this guide for information on related guides.

If you are looking for: Turn to:

Details of Multi-Services Hub functions and features, and add-on products Chapter One How to install the chassis and the ancillary items Chapter Two How to install and remove LinkBuilder MSH and ECS modules Chapter Three How to use the display panel and what you can do with it Chapter Four How to identify and resolve any problems Chapter Five Standards used in the development of the MSH Appendix A Technical specifications for LinkBuilder MSH products Appendix B MSH power consumption limits Appendix C Connector pin assignments Appendix D Ordering information for products mentioned in this user guide. Appendix E How you can contact 3Com Appendix F

DUA1800-0AAA04

HAT IS THE LINKBUILDER

■ The LinkBuilder MSH and the services it provides

■

■ A brief explanation of the display panel, power supply units and

MSH?

This chapter introduces:

The modules

thermal management unit.

WARNING:

i.e., removal and replacement of modules, power supply units and other ancillary components must only be carried out by qualified personnel

AVERTISSEMENT:

MSH, comme par exemple, l'enlèvement et le remplacement des modules, des fournitures électriques et des autres composants, doivent être effectués uniquement par un personnel qualifié.

Installation and configuration of the MSH chassis,

L'installation et la configuration du châssis

The LinkBuilder MSH

The LinkBuilder MSH provides a central hub for network interconnection and management.

There is a diagram of an MSH and key to the compnents overleaf. The basis of the MSH is the chassis, into which can be installed a series of media specific modules. At the heart of the chassis is the backplane onto which all modules connect. It is the backplane which allows communication between the network segments using the MSH. A locking bar fitted across the front of the MSH chassis prevents removal of modules and power supply units by unqualified personnel.

1-2 C

HAPTER

HAT IS THE LINKBUILDER

1: W

MSH?

Power is supplied to the chassis via one or two and the chassis is kept cool with a Your local interface with the MSH is via a convenience may be installed at the front or rear of the chassis. This display panel provides simple local fault finding and management status information and an RS232 port for out-of-band management. Detailed management of the system is available via a remote management tool such as the ISOVIEW Network Manager.

thermal management unit

power supply units

display panel

which for

Figure 1-1 The LinkBuilder MSH

DUA1800-0AAA04

The LinkBuilder MSH 1-3

MSH Chassis

which all components are installed. See

Display Panel

- The 11-slot chassis that holds the backplane into

The Chassis

on page 1-4

- Can be fitted front or back. Provides your local

interface to the control and management of the MSH. See

Display Panel

Power Supply Units

on page 1-9

- Distributes power to the other modules. One unit is essential for operation, two are recommended for resilience. See

Power Inlet Panel

sockets. See page 2-8

Thermal Management Unit

air to the modules. See page 1-10

Locking Bar

Power Supply Units (PSU)

on page 1-8

- Provides the power connection via two IEC

The Power Supply Unit And Power Inlet Panel

- A fan unit that supplies cooling

The Thermal Management Unit (TMU)

- This must be fitted to prevent removal of modules

and power supply units by unqualified personnel. See

Bar

on page 2-5

The Locking

The

DUA1800-0AAA04

Documentation Holder

guides. See

Storing The User Guides

Module Slot and Blanking Plate

- A useful place to store module user on page 2-24

- There are eleven identical slots that can take one of a range of modules. Blanking plates that cover 1, 3 and 5 vacant slots are supplied.

For Modules

Module

Modules

- One of a wide range available from 3Com. See on page 1-8.

on page 3-17

and Blanking Plates

See Choosing Slots

on page 3-16

The

Packaged with the MSH chassis, but not shown on Figure 1-1:

The Rack Mounting Kit

allow the MSH to be mounted into a 19 inch rack. See

Into A 19 Inch Rack

- Consists of a pair of brackets that

on page 2-4

Installation

1-4 C

HAPTER

HAT IS THE LINKBUILDER

1: W

MSH?

Available to order, but not shown on Figure 1-1:

The Cable Support Kit

prevents strain on the connections. on page 1-10

The MSH components are explained more fully in the sections which follow.

The Chassis

The chassis has two versions. 3C18000 supports Ethernet and Token Ring: 3C18001 supports FDDI as well. Upgrade from 3C18000 to 3C18001 is available. Ask your supplier for details.

Either chassis has eleven slots offering identical functionality to a maximum of eleven modules if the unit is fully populated. Two identical slots on the left-hand side of the chassis can each hold a power supply unit (PSU). A power inlet panel located between the right-hand PSU slot (PSU 2) and the module slots provides two IEC sockets, one for each PSU. It is worth noting at this point that connectivity modules

cannot cannot

- Takes the weight of network cables and

See The Cable Support Tray

and Appendix E for ordering information.

cannot

be fitted into PSU slots, the PSU be fitted into module slots and the power inlet panel be moved from its position.

The chassis is suitable for installation into a standard 19 inch rack system or stand-alone desk or shelf mounting and has been designed so that you may decide which face of the unit is the front. Blanking plates of various sizes are supplied to cover any unused slots whilst the unit is in operation.

Underneath the chassis there is a storage position for holding up to four module user guides. We suggest that you use this as a way of keeping the useful information contained in the guides at your finger-tips.

Fitted in the chassis and central to the operation of the MSH is the backplane.

DUA1800-0AAA04

The Backplane

The backplane provides the following services to the MSH:

■

Ethernet support via a medium speed CSMA/CD bus

■

Token ring support via a flexible high speed bus

■

FDDI support via a flexible high-speed bus (3C18001 or converted 3C18000)

■

Management via a separate management bus

■

Power

■

System control

Ethernet Support

The Ethernet bus has been designed to conform to the IEEE 802.3 standard for Local Area Networks. It supports three individual paths which are tracked to all module slots. You can decide to which Ethernet bus a module connects thus allowing multiple segments within the one chassis..

The Chassis 1-5

DUA1800-0AAA04

Bus 3 Bus 2 Bus 1

ECS module

Figure 1-2

with adap

Ethernet backplane operation

ter

MSH modules

Figure 1-2 shows an ECS module fitted with a converter connecting into Bus E1 on the MSH Backplane, and MSH modules connecting to any of the three ethernet buses.

1-6 C

HAPTER

HAT IS THE LINKBUILDER

1: W

MSH?

ECS modules can connect to any of the three buses, however, you should note that an ECS module attached to Buses E2 or E3 will not have full statistics gathering facilities. Note also that an ECS module should only be installed in slots 1 to 10 in the MSH chassis.

Bus selection on MSH modules is controlled via link settings on the board or through a remote management tool such as Transcend software or using the front panel RS232 port.

You will find further information about this subject in Chapter 3,

The Modules

on page 1-8 in this user guide and in the user guide

that accompanies each module.

Token Ring Support

The MSH supports up to five individually managed token rings using a bus tracked to all slots in the chassis. Token rings are created using RingBuilder and MAU modules. Each RingBuilder has a local ring section number associated with it, set by switches on the RingBuilder or by the Management Module. Similarly all MAU modules have local ring section numbers. A RingBuilder combines all MAUs with local ring section numbers that match the RingBuilder's local ring section number into one logical token ring. Any MAUs with a local ring section number of zero, or one that does not match the local ring section numbers of any RingBuilder are left isolated as single, stand-alone token rings. The MSH supports tokens rings at both 4Mbps and 16Mbps but all modules in a local ring section must operate at the same speed.

DUA1800-0AAA04

The Chassis 1-7

DUA1800-0AAA04

Figure 1-3

Token ring backplane operation

You will find further information about this subject in Chapter 3,

The Modules

on page 1-8 in this user guide and in the user guide

that accompanies each module.

FDDI Support

The MSH chassis (3C18001) which is fitted with a FDDI backplane, supports three managed 100Mbs FDDI rings.

Rings are created with an FDDI RingBuilder Module and one or more port cards (fiber, UTP or any combination of these up to ten modules). RingBuilder Modules may contain up to two FDDI Media Modules, which connect to external FDDI devices. Port cards associated with a RingBuilder Module must be to the left of that RingBuilder Module. A special FDDI interface on the backplane allows a LinkSwitch FDDI Module to communicate with the associated RingBuilder Module on its left. The user guide which accompanies your RingBuilder Module gives you a full description of how to deploy the FDDI modules in an MSH chassis. Management is through the MSH display panel RS232

1-8 C

HAPTER

1: W

management port, a remote manager using Telnet or an SNMP management application such as one of the 3Com Transcend range.

The Modules

The range of modules available for installation into the LinkBuilder MSH is constantly being extended. Please contact your local supplier for further information.

If you already have a LinkBuilder ECS10 or ECS4, the modules that you use for this system can be easily adapted for installation into the MSH chassis. This is achieved by attaching a converter to the ECS module which will allow it to connect to the MSH backplane.

ECS modules are also known as line cards.

You will find further information about module functionality in Chapter 3, guide.

HAT IS THE LINKBUILDER

MSH?

LinkBuilder MSH Modules

on page 3-17 in this user

Power Supply Units (PSU)

Two slots are provided within the MSH chassis for power supply units. The MSH can be configured with one PSU installed into the chassis. However with two PSUs installed, each contributes approximately half of the power requirement, enabling the load to be shared. This increases the reliability of the power supply units. Failure of one of the power supply units would result in the other unit taking over the full load, without any interruption to the operation of the MSH.

See Appendix C for details of the use of the two different capacity PSUs and how to calculate power requirements for a particular MSH configuration.

DUA1800-0AAA04

Power is supplied to the chassis via two IEC sockets (the top socket serves the left-hand PSU) on a fixed power inlet panel fitted in the chassis between the right-hand PSU slot (PSU 2), and the module slots. The two sockets provide resilience against power supply cable or fuse faults.

The Display Panel

The display panel provides the following features:

■

Lamps Button

The Lamps button allows you to carry out an LED test which shows you that all the LEDs on the display panel and on modules installed into the chassis, are working. If an LED on the display panel does not light, refer to Chapter 5 of this user guide; if it is a problem with a module LED, refer to the user guide that accompanies the product.

■

Reset Button

The Display Panel 1-9

■

DUA1800-0AAA04

Pressing the Reset button restarts the MSH. To prevent an accidental reset of the modules, the Enter button on the four-button keypad must be pressed at the same time as the Reset button

.You should only need to reset the MSH immediately after installation. It is advisable not to use the Reset button during normal operation, as this could cause loss of data.

RS232 Port

This is a 25-way D-Type connector to which you may connect a local management terminal directly or via a modem. Note that, in order to use this port, a LinkBuilder MSH Management Module must be installed into the chassis.

The display panel also gives you simple fault finding with a line of comprehensive LEDs, which are explained in Chapters 4 and 5.

1-10 C

HAPTER

HAT IS THE LINKBUILDER

1: W

MSH?

If you have a Management Module installed, you can access read-only information telling you how the chassis is set up. More details can be found in the user guide that accompanies the Management Module.

For convenience, the display panel may be installed into the front of the MSH chassis (the face of the chassis with cable connections and module LEDs) or it may be fitted to the back of the chassis if you wish to have network connections and cables kept behind the MSH.

The Thermal Management Unit (TMU)

This is a fan unit which slides into the bottom of the MSH chassis and supplies cooling air to the modules by forced circulation. Each fan has its own failure detector. In the unlikely event of one of the fans in the unit failing, a Fan Fail LED located on the display panel at the top of the MSH chassis will light and a message will be sent to network management stations. If a fan does fail, you should contact your supplier immediately as the failure may lead to overheating and subsequent damage to the modules.

Filters fitted over each fan, prevent dust and debris from entering the chassis. These should be cleaned at regular intervals.

The Cable Support Tray

We recommend that all external cables from the LinkBuilder MSH are provided with some form of strain relief. The

has been specifically designed for use with the MSH chassis.

tray

When fitted, the cable support tray also provides the correct clearance underneath the unit so that cooling air can freely circulate.

cable support

DUA1800-0AAA04

Management Of The LinkBuilder MSH 1-11

Management Of The LinkBuilder MSH

You are advised to install a LinkBuilder Management Module into the MSH. This will enable you to more effectively manage the multiservice facilities of the MSH.

There are four possible methods of management.

■

If the MSH does not contain a Management Module:

■

you have access to simple monitoring, using the LED indicators located on the display panel and on modules, and by manually setting links on the modules.

■

If there is a Management Module installed in the MSH Chassis:

■

Remote Network Management, for instance ISOVIEW Network Manager or Transcend applications for SunNet and HP OpenView Managers, is the most powerful method of management. It allows access to and control of a range of features, including error and traffic rate triggers.

DUA1800-0AAA04

■

Using a local management terminal connected to the RS232 port on the display panel provides a method of accessing a comprehensive set of management tools for out-of-band management.

■

The 2-line x 24-character LCD panel displays read-only information detailing statistics, port traffic, version numbers etc. Refer to the user guides that accompany the Management Module.

You will find further information in

Management

on page 4-6.

1-12 C

HAPTER

HAT IS THE LINKBUILDER

1: W

MSH?

DUA1800-0AAA04

NSTALLING THE LINKBUILDER

■

■ Details of how to install:

MSH

This chapter provides: An overview of the steps needed to install the MSH Details of how to install the chassis

■

a power supply unit

■

the display panel

■

the thermal management unit

■

the rack/cable mounting kit

WARNING:

must be carried out by qualified personnel only.

AVERTISSEMENT:

ce chapitre doivent être effectuées uniquement par un personnel qualifié.

Maintenance operations described in this chapter

Les opérations de maintenance décrites dans

Introduction

We suggest that you carry out the following sequence of steps to install and set up the LinkBuilder MSH:

If the MSH is to be installed on a new or extended network,

ensure that all the network cabling has been set up and tested before starting the installation.

Install the chassis, and at least one power supply unit and check

that they are operating correctly.

2-2 C

HAPTER

NSTALLING THE LINKBUILDER

2: I

Install modules and a Management Module if you are using one, into the chassis, and check their operation

Attach your network cabling to the modules you have installed.

A Suitable Site For Installation

Before you install the MSH, make sure that the location you have chosen is suitable. There should be:

Adequate ventilation. The chassis has three sets of ventilation

■

holes - one on the top of the chassis, one at the back and one underneath. Ventilation panels and the air-intake at the front of the fan tray must be free of obstructions at all times to allow adequate circulation of cooling air.

Adequate clearance to allow for cable connections, viewing and

■

use of display panel and LEDs, and installation and removal of modules.

Access to a power supply with two sockets.

■

MSH

No direct sources of electrical interference in the immediate area,

■

for example, machinery, power lines, transmitters. No danger of condensation, liquids or excessive amounts of dust

■

entering the chassis.

Remember also that the MSH operates correctly in temperatures

between 0°C and 40°C (32°F and 104°F).

Installing The Chassis

A pair of brackets for mounting the MSH are supplied with the chassis. The MSH can be:

Fitted into a standard 19 inch rack system.

■

Left as a stand-alone piece of equipment, for example, on a desk

■

or shelf.

DUA1800-0AAA04

Introduction 2-3

If MSH chassis are mounted one above the other, there must be adequate space between them for cooling air to pass. When fitted, the cable support tray, which can be ordered from your local LinkBuilder supplier, provides the correct spacing between units. If you do not fit a cable support tray you should leave 1U between units. (The height of standard 19 inch rack mountings are measured in `U's. 1U is approximately 45 millimeters (1

/4”).)

If you decide to install the chassis into a 19 inch rack, you can also determine which face of the chassis is the front. Throughout this user guide, we assume that the front of the chassis is that face which has the network connections and module LEDs. However, you may find that, for your set-up, it is more convenient to have all cable connections at the back of the unit.

Fitting The Mounting Brackets

Refer to Figure 2-1.

Figure 2-1

DUA1800-0AAA04

Position of the Mounting Brackets (lefthand side view)

2-4 C

HAPTER

NSTALLING THE LINKBUILDER

2: I

MSH

There are two sets of holes on each side of the MSH chassis. These allow for fitting the mounting brackets to two different positions:

If you decide to have the face of the chassis that takes the cable

■

connections and shows module LEDs as the

, fit the brackets

front

to the holes near this face. If you decide to have the face of the chassis that is clear of

■

connections as the front, fit the brackets using the set of holes towards the rear face.

If you decide on this configuration, the display panel above the module slots must be moved. Refer to The Display Panel on page 2-15.

Match the appropriate bracket with the holes on the side face of

the MSH chassis.

Locate the four slotted screws into the holes and tighten using a

flat-tipped screwdriver.

To remove the bracket, loosen the four screws, and lift it away. Store both brackets and screws safely for future use.

Installation Into A 19 Inch Rack

Fit the mounting brackets that are supplied with the chassis to the

face which you have decided is the front of the chassis.

Refer to the manufacturer's documentation that accompanies the

19 inch rack for details of installation. If there is a door fitted to the rack, it is essential that there is adequate clearance between the door and the front of the MSH chassis to prevent damage to cables and connectors.

DUA1800-0AAA04

The Locking Bar

The MSH chassis is delivered with a locking bar fitted. Once the MSH is fully assembled and installed, you must refit this locking bar. This will prevent the removal and replacement of power supplies, modules etc. by unqualified personnel.

Fitting The Locking Bar

Position the locking bar so that its two captive, fixing screws align with holes in the thermal management unit. Note that for clarity, the captive screws are shown removed from the bar in Figure 2-2.

Locate two small screws into the appropriate holes and tighten fully with a flat bladed screwdriver.

To remove the locking bar, loosen two screws and remove bar.

Introduction 2-5

DUA1800-0AAA04

Figure 2-2

Installing the Locking Bar

2-6 C

HAPTER

NSTALLING THE LINKBUILDER

2: I

MSH

Assembling The LinkBuilder MSH

WARNING:

powered-up MSH must not be left unattended

Safety Information

WARNING:

power leads before servicing.

ATTENTION

The MSH cannot be powered from IT are of the IT type, then the unit should be powered with 230V (2P + T) via an isolation transformer ratio 1:1, with the secondary connection point labelled neutral, connected directly to earth.

‡

Impedance à la tierre

The MSH operates under SELV conditions (Safety Extra Low Voltage) according to IEC 950, the conditions of which are maintained only if the equipment to which it is connected is also operating under SELV.

The power inlet panel is an integral part of the MSH chassis. Do not make any attempt to remove it. If you suspect a problem is related to the panel, please contact your supplier.

During installation and maintenance operations, the

This equipment must be earthed. Disconnect both

- Débrancher les 2 cordons avant entretien.

‡

supplies. If your supplies

The Power Lead - General1

The power lead must be approved for the country where it will be

■

used. The appliance coupler (that is the connector to the device itself -

■

not the wall plug), must have a configuration for mating with a EN 60320/IEC320 appliance inlet (Standard Sheet C14).

The Power Lead - USA and Canada

The power lead must be UL-listed and CSA-certified.

■

DUA1800-0AAA04

Safety Information 2-7

■

The minimum specifications for the flexible lead are:

■

- No. 18 AWG

■

- Type SV or SJ

■

- 3-conductor

■

The power lead must have a rated current capacity of at least 10A.

■

The attachment plug must be an earth-grounding type with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A, 250V) configuration.

The Power Supply Plug

If the power supply plug is unsuitable and you have to replace it, you may find that the color coding for the replacement power connector differs from the scheme used on the original connector. Connect the power supply wire from the MSH according to the following scheme:

DUA1800-0AAA04

■

Brown wire to the Live (Line) plug terminal which may be marked with the letter L or colored red.

■

Blue wire to the neutral plug terminal which may be marked with the letter N or colored black.

■

Yellow/Green wire to the Earth (Ground) plug terminal which may be marked with the letter E or the earth symbol or colored green/yellow.

WARNING:

It is essential that the power plugs of the final

installation remain nearby and easily accessible.

ATTENTION

- Il est essentiel que la prise principale de

l'installation finale soit située à proximité et facilement accessible.

The MSH is delivered with one power supply unit (PSU). It will operate with one unit installed, but two units will provide a resilient power supply in the unlikely event of a failure of one unit.

2-8 C

HAPTER

NSTALLING THE LINKBUILDER

2: I

MSH

The Power Supply Unit And Power Inlet Panel

We recommend that you install two units. Further power supply units are available from your LinkBuilder supplier: see Appendix E

Ordering Information

resilient supplies and calculating supply requirements.

One PSU installed into the MSH chassis can provide up to 375W or 525W of power (maximum- depending on which PSU was purchased), allowing the use of various types and numbers of modules.

With two Units installed, each contributes approximately half of the power requirement of the chassis. This enables the load to be shared, increasing the reliability of the PSUs. Failure of one of the PSUs would result in the other unit taking over the full load, without any interruption to the operation of the MSH.

To ensure the operation of a resilient power supply in the MSH chassis, you are advised to follow the instructions in Appendix C and calculate total power and current consumptions before installing the modules.

. See Appendix C for details of configuring

Power is supplied to the chassis via two IEC sockets on the power inlet panel which is located between the right-hand PSU slot (PSU

2) and the first module slot. The top IEC socket supplies power to the left-hand PSU (PSU 1), the lower socket supplies to the right-hand PSU (PSU 2). The unit does not have an ON/OFF switch, so it is isolated from power by disconnecting the appropriate power supply cable. The power inlet panel also contains two replaceable fuses: see the section entitled

The Power Supply Fuses

Replacing

The MSH PSU features automatic voltage selection according to the supply that you are using.

A power lead terminated at both ends is supplied with the chassis. Refer to the

Safety Information

on the previous pages.

DUA1800-0AAA04

The Power Supply Unit And Power Inlet Panel 2-9

Installing The Power Supply Unit

We recommend that, if a single power supply unit is to be used to power the MSH, the power supply unit should be installed into the slot at the far left of the chassis. This position optimizes ventilation within the chassis. MSH chassis are shipped without a blanking plate covering this slot.

If you are installing a second power supply unit, it can be inserted without powering down the MSH (this is known as This will not cause any damage to your equipment, but packets of data passing through the unit at the time of insertion could be corrupted.

hot insertion

WARNING:

One PSU blanking plate is supplied. If you only have one PSU installed, the adjacent vacant slot must be covered with the blanking plate to allow cooling air to be directed onto the installed PSU.

Hot insertion or removal of modules and/or PSUs may result in code corruption in modules which contain microprocessors (e.g. management or bridge modules). In the unlikely event that this occurs, carry out a reset operation by depressing the `Enter' and `Reset' buttons on the display panel simultaneously. The affected modules will then resume their operational state.

We recommend that you use the following steps to install the power supply unit. If you are hot inserting a second power supply unit, ignore the first step.

Disconnect the power supply cable(s) from the IEC socket(s) on the power inlet panel to ensure the MSH is powered down.

Undo two screws securing the locking bar and lift it away from chassis.

The chassis offers two possible positions for power supply units; the two left-most slots in the chassis. When a second power

DUA1800-0AAA04

2-10 C

HAPTER

NSTALLING THE LINKBUILDER

2: I

MSH

supply unit is to be installed into the chassis, the blanking plate covering the remaining power supply unit slot must be removed. See

Blanking Plates

Orientate the power supply unit so that the ejector showing the

on page 3-16.

part number is at the top and the 11 way DIN connectors are nearest to the unit. See Figure 2-3.

Figure 2-3

Raise the ejectors at the top and bottom of the PSU to the open

Inserting the PSU (3C18011 shown)

position. See Figure 2-4. With the unit located in the slot runners, guide the power supply unit into the chassis until the hook on the top of the ejector locates under the edge of the chassis. See Figure 2-4. Ensure that the ejector at the bottom of the PSU is in a similar position.

DUA1800-0AAA04

+ 89 hidden pages