Rockwell-automation MHB44IND Pulse Input and Analogue Output Module Manuale Utente Scaricare il pdf (Pagina 8)

8

MHB44IND

October

200

5

–

I

ssue 2

Triguard

SC300E

EXTERNAL

CONNECTIONS

All

connections

to

the

MHB44IND

are

made

via

DIN

41612

connectors.

The

upper

connector

is

the

system

triple

I/O

bus

connector.

The

middle

connector

is

for

the

field

inputs

and

outputs.

The

lower

connector

is

electrically

in

parallel

with

the

middle

connector.

System

interface

This

MHB44IND

acts

as

a slave

to

the

MPP

masters,

and

communication

between

three

MPPs

and

the

MHB44IND

takes

place

over

the

triplicated

16

bit

parallel

I/O

-

MPP

buses

that

run

along

the

chassis

mounted

backplane.

The

three

I/O

-

MPP

buses

are

connected

via

the

module’s

upper

syst

em

interface

DIN

41612

connector.

Field

interface

The

MHB44IND

input,

output

and

feedback

connections

are

wired

via

one

of

the

connectors

(J2

or

J3)

to

the

termination

card

TPH44AIC.

Pulse

inputs

Four

isolated

voltage

inputs

of

100mV

to

150V

peak

to

peak

are provided.

Each

pulse

input

channel

has

both

its

lines

connected

via

100k

ohm

resistors

to

the

test

jacks

and

a front

panel

mounted

LED

flashes

to

indicate

when

pulses

are

being

received.

Current

loop

outputs

Four

0 to

22mA

with

common

return.

The

termination

card

has

a precision

resistor

for

each

channel

to

control

the

current.

This

allows

two

modules

to

be

used

for

dual

-

slot

hot

repair

purposes

using

the

same

termination

card.

CONFIGURATION LINKS

The

module

contains

a hardware

identity

circuit

that

enables

system

identification

of

the

module,

and

seven

manual

configuration

links,

JP1

to

JP4

and

LK1,

LK2

and

LK3.

Links

JP1

to

JP4

and

LK1

to

LK3

Links

JP1

to

JP4

enable

undercurrent

and

overcurrent

monitoring

from

a special

termination

card

giving

ga

lvanically

isolated

outputs.

Links

JP1

to

JP4

must

beset

to

the

Off

position.

Links

LK1

to

LK3

are

described

in

Section

2.6,

Theory

of

operation.

POWER SUPPLIES

The

MHB44IND

operates

from

dual

power

inputs

supplied

by

the

system’s

dual

redundant

PSUs,

that

each

supply

voltages

of

approximately

5.4Vdc

and

12Vdc.

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