Rockwell-automation MHB44IND Pulse Input and Analogue Output Module Manuel d'utilisateur télécharger pdf (Page 6)

6

MHB44IND

October

200

5

–

I

ssue 2

Triguard

SC300E

TECHNICAL

DESCRIPTIO

N

PHYSICAL

The

MHB44IND

is

a 9U

high

PCB

with

integral

front

panel

and

rear

connectors.

A plug

-

in

daughterboard

carries

the

common

interface

circuits.

Figure

1

-

1 shows

the

general

layout,

including

the

location

of

the

connectors,

covers

and

configuration

links.

The

front

panel

provides

the

following:

Three

‘On

-

Line’

indicators

A ‘Health’

indicator

An

On/Off

line

request

switch

Eight

test

jacks

as

monitor

points

for

the

pulse

input

lines

Four received

-

pulse

indicators

(one

per

input

pair)

Four

test

jacks

(plus

common)

for

monitoring

the

o

utput

lines.

NOTE

Each

monitor

point

gives

0 to

5.5Vdc

negative

with

respect

to

common,

determining

the

current

flowing

in

the

corresponding

0 to

22

mA

output.

Each

monitor

point

has

a 10k

ohm

resistance

in

series

to

prevent

malfunction

if

the

monitor

point

is

short

circuited

-

so

a high

input

-

resistance

meter

is

required

for

accurate

readings.

MECHANICAL CODING BLOCKS

All

Input/Output

modules

carry

two

mechanical

coding

blocks

equipped

with

pins

which

mate

with

holes

in

corresponding

blocks

in

the

chass

is

and

prevent

the

module

being

inserted

into

the

wrong

slot.

The

pins

in

the

module

blocks

are

factory

installed

in

a pattern

determined

by

the

module

and

corresponding

set

screws

are

removed

from

the

chassis

coding

blocks

to

enable

fitting.

Unused

holes

are

plugged

with

set

screws.

The

chassis

mechanical

coding

block

configuration

for

this

module

is

shown

in

Figure

2

-

1

.

Figure

2

-

1 Chassis

mechanical

coding

block

configurations

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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