Rockwell-automation TM117-DMX Channel De-multiplexed Display Driver Instrukcja Użytkownika Pobierz pdf (Strona 8)

TM117-DMX

64

Channel

De-multiplexed

Display

Driver

User

Manual

2

-

2

00

8

-

521

6

-

02

Chapter

2 Tec hnical

description

(PL5)

Watchdog

Outputs

and

’Sync’

Bus

SW1

(PL6)

Power

Supply

Input

Serial

Data

Communications

SW2

Outputs

to

Display

PL1

PL2

PL3

PL4

Daughter-

board

’A’

PL7

Daughter-

board

’B’

Heatsink

Heatsink

Figure

2-2.

TM117-DMX

physical

layout

2.1.1

Ancillary

circuits

There

are

two

types

of

connection

made

to

the

DMX

panel:

1.

Field

output

connections,

panel

power

requirements

(+24V)

and

control

logic

signals

to

the

motherboard

are

through

screw

type

terminals.

2.

Data

communication

to

the

panel

is

via

9-pin

D-type

connectors.

2.2

Theory

of

operation

2.2.1

Serial

interface

The

module

is

driven

from

the

MSR04X1

serial

communications

(SIO)

module

using

a dumb

protocol.

The

information

sent

from

the

SIO

module

contains

a device

address

and

data containing

the

output

conditions

for

that

device.

The

message

is

read

by

each

of

the

modules

on the

multidrop

loop

but

is

accepted

only

by

those

modules

whose

address

is

valid

for

that

message.

When

a device

recognises

its

address,

its

communication

watchdog

circuit

is

updated.

A synchronisation

signal

is

provided

for

the

flash

oscillator

so

that

all

TM117-DMX

modules

driving

a single

display

will

flash

together.

In

normal

use,

TM117-DMX

modules

are

fitted

in

pairs

to

a single

motherboard.

Both

modules

drive

the

same

64

outputs

but

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