Rockwell-automation MAI32AD 32-Analogue Input Module Differential Inpu Instrukcja Użytkownika Pobierz pdf (Strona 6)

6

MAI32*A

D

October

200

5

–

Issue 4

Triguard

SC300E

TECHNICAL

DESCRIPTIO

N

PHYSICAL

The

Analogue

Input

Module

is

a 9U

high

PCB

with

integral

front

panel

and

rear

connectors;

a

plug

-

in

daughter

board

carries

the

Common

Interface

circuits.The

general

layout,

location

of

the

connectors,

front

panel

components

and

the

321/320

configuration

link

is

shown

in

Figure

1

-

1.

Mechanical coding blocks

All

Input/Output

modules

carry

two

mechanical

coding

blocks

equipped

with

pins

which

mate

with

holes

in

corresponding

blocks

in

the

chassis

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

thi

s module

is

shown

i

n Figure

2

-

1

.

Figure

2

-

1 Chassis

mechanical

coding

block

configurations

EXTERNAL

CONNECTIONS

Field

circuits

The

field

input

loop

shown

in

Figure

2

-

2 is

the

absolute

minimum

required

for

the

safe

connection

of

analogue

inputs.

We

however,

recommend

the

use

of

their

16

Channel

Analogue

Input

termination

cards

TAI16***

which

can

offer

field

power

supplies,

remote

and

local

alarm

indication,

transient

suppression

and

signal

and

protective

ground

facilities.

Figure

2

-

3 shows

a termination

card

for

a current

input

module.

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