Rockwell-automation MBB BUS Extender Module Manuel d'utilisateur télécharger pdf (Page 4)

4

MBB

October

200

5

–

Issue 4

T

riguard

SC300E

TECHNICAL

DESCRIPTIO

N

PHYSICAL

The

MBB

is

a 9U

high

PCB

with

integral

front

panel.

A general

view

is

shown

in

Figure

1

-

1.

DIP

switch

SW1

is

inactive

in

the

present

application.

EXTERNAL

CONNECTIONS

Each

module

is

plugged

into

an

extension

chassis

backplane

bus

system

via

two

DIN41612

connectors

J1

and

J2

(Figure

1

-

1).

The

extension

chassis

backplane

bus

i

nterconnections

are

shown

in

Figure

2

-

2.

The

signals

passing

through

J1

and

J2

are

available

at

the

rear

of

the

extension

chassis

backplane.

The

rear

backplane

connectors

are

shown

in

Figure

2

-

3.

For

additional

information,

refer

to

the

chassis

user

manual

(Ref

no.

008

-

5097).

Connector

J1

links

the

MBB

to

the

I/O

modules

and

is

represented

on

the

rear

of

the

chassis

backplane

by

Area

‘d’.

Area

‘d’

consists

of

extensions

to

the

pins

of

the

J1

mating

connector

(96

pins

in

three

columns

‘a’,

‘b’

and

‘c’).

Pins

07

to

10

of

columns

‘b’

and

‘c’

are

specially

extended

to

enable

the

installation

of

the

chassis

address

setting

links

(Section

2.5,

Extension

chassis

addressing).

The

I/O

modules

interface

to

three

isolated

communications

buses

(shown

collectively

as

the

‘MBB

-

I/O

Bus’

in

Figure

2

-

2),

each

bus

being

served

by

one

of

the

MBBs.

Columns

‘a’

and

‘c’

of

connectors

J2

link

each

MBB

to

the

expansion

bus

via

rear

backplane

connectors

‘e’.

The

same

basic

chassis

is

used

for

both

the

main

chassis

and

the

extens

ion

chassis.

The

following

chassis

backplane

features

are

not

used

in

the

extension

chassis

application:

•

The

inter

-

processor

communications

bus

(Figure

2

-

2)

and

hence

Column

‘b’

of

connector

J2/backplane

connector

‘e’.

•

Watchdog

timer

‘WDT’

connectors

‘f’

(Figure

2

-

3)

•

Diagnostic

serial

ports

‘g’

(Figure

2

-

3)

•

Expansion

Bus

The

main

and

extension

chassis

are

interconnected

by

ribbon

cables

running

between

expansion

bus

connectors

‘e’

on

their

respective

chassis

backplanes

as

shown

in

Figure

2

-

1.

A special

bus

expansion

adaptor

(ref

TBA)

is

used

to

effect

a 2

-

into

-

1 junction

at

intermediate

points.

1 2 3 4 5 6 7 8 9 10 11 12

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