Data translation Dt2814 User manual

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SM

View

Instra

Document

UM-05143-0

User

Manual

for

DT2814

IBM

PC/XT/AT

COMPATIBLE

A/D

CONVERTER

BOARD

1985

by

Data

Translation,

Inc.

Data

Translation,

Inc.

100

Locke

Drive

Marlborough,

MA

01752-1192

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

All

rights

reserved.

No

part

of

this

publication

may

be

reproduced,

stored

in

a

retrieval

system,

or

transmitted,

in

any

form

by

any

means,

electronic,

mechanical,

by

photocopying,

recording,

or

otherwise,

without

the

prior

written

permission

of

Data

Translation,

Inc.

First

Edition

October,

1985

October,

1985

Printing

Information

furnished

by

Data

Translation,

Inc.

is

believed

to

be

accurate

and

reliable;

however,

no

responsibility

is

assumed

by

Data

Translation,

Inc.

for

its

use;

nor

for

any

infringements

of

patents

or

other

rights

of

third

parties

which

may

result

from

its

use.

No

license

is

granted

by

implication

or

otherwise

under

any

patent

rights

of

Data

Translation,

Inc.

BASIC

is

a

trademark

of

Dartmouth

College.

IBM

PC,

IBM

PC/XT,

and

IBM

PC/AT

are

trademarks

of

International

Business

Machines

Corporation.

DT2814

is

a

trademark

of

Data

Translation,

Inc.

Data

Translation

is

a

registered

trademark

of

Data

Translation,

Inc.

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PREFACE

CHAPTER 1

1.1

1.2

CHAPTER 2

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

CHAPTER 3

3.1

3.2

3.2.1

3.2.2

3.3

3.3.1

3.3.2

3.3.3

3.

4

3.4

CHAPTER 4

4.1

4.2

4.3

4.4

4.5

CHAPTER 5

5.1

5.2

5.2.1

5.2.2

5.2.3

5.3

5.3.1

5.3.2

CONTENTS

INTRODUCTION

OVERVIEW

. . • . . • .

ACCESSORIES . . . . •

SPECIFICATIONS

• • • •

1-1

• • • •

1-1

~NTRODUCTION

. • • . •

ANALOG

INPUTS . . . . . • • •

ON-BOARD

CLOCK

. . . .

. . . . . . . . . .

2-1

. . . . . . . . . .

2-1

. . . . . . . . . .

2-3

INTERFACE CHARACTERISTICS

POWER

REQUIREMENTS . • . .

PHYSICAL/ENVIRONMENTAL . . . . . . . .

CONNECTORS

AND

CABLES

. . • . • • • .

COMPATIBLE

SCREW

TERMINAL

PANELS

UNPACKING

AND

CONFIGURATION

. . . . . .

2-4

. . . .

2-5

. . . . .

2-6

INTRODUCTION . . . . . . • • . • • . •

3-1

UNPACKING

. . . . . . . . . . . . . .

3-1

NO

APPARENT

DAMAGE

. • • . . • • . • • . . . . .

3-1

VISIBLE

DAMAGE

. . . . • . • • . •

3-2

CONFIGURATION . . . . . . . . . . . .

3-4

BASE

ADDRESS SELECTION . . . • . . . .

3-4

INPUT

RANGES

. . . • • . . . . • • . • .

3-5

CLOCK

BASE

FREQUENCY

SELECTION . • • . . . .

3-6

INTERRUPT LEVEL . • • .

...••....•

3-7

JUMPER

SUMMARY

• • . . . . • . . . • • . .

3-7

INTERCONNECTIONS

. . . . .

4-1

INTRODUCTION . . . . • • • • . •

CONNECTION

TO

IBM

PC

BACKPLANE

. . .

USER

CONNECTION . . . . . • . .

CONNECTIONS

TO

SCREW

TERMINAL

PANELS

SINGLE-ENDED

CONNECTION

SCHEME

. • • .

ARCHITECTURE

AND

OPERATION

. • . . .

4-1

. . . . .

·4-

3

. . . . .

4-4

. . . .

4-6

INTRODUCTION . • . • • • . • • • • . • • • . •

5-1

ARCHITECTURE . . . • • . . • . . . • • . . • •

5-l

CONTROL

REGISTER (BASE +

0,

WRITE

ONLY)

••.•

5-2

STATUS REGISTER (BASE +

0;

READ

ONLY)

.•..•

5-4

A/D

DATA

REGISTER (BASE +

1;

READ

ONLY)

....

5-6

OPERATION . . . . . . . • . • . . • • • . • . . .

5-7

INITIALIZATION

. . . • . • . • . . • . .

5-7

A/D

CONVERSION . . . . • . . . • . • • .

5-7

iii

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5.3.3

CHAPTER 6

6.1

6.2

6.2.1

6.2.2

6.2.3

6.2.4

6.3

6.3.1

6.3.2

6.3.3

6.3.4

6.3.5

6.3.6

CHAPTER 7

7.1

7

.1.1

7.1.2

APPENDIX A

INDEX

PROGRAMING

SEQUENCE

..

. . . . . .

5-8

CALIBRATION

INTRODUCTION • . . • • . • • • . • . • • • . • • •

6-1

GUIDELINES • • • • • • • . • • • • • • • •

6-1

ASSUMPTIONS • . • • • . • • • • • •

6-1

EQUIPMENT REQUIRED • . • • • • . • • • • • •

6-2

PRECAUTIONS . • . • • • • • • • • • • • • •

6-2

INTERCONNECTIONS • • . • • . • • • . • •

6-2

CALIBRATION

PROCEDURE

• • • . • • • . • .

6-2

UNIPOLAR OFFSET ADJUST • . • • • • • • • • •

6-3

UNIPOLAR GAIN ADJUST (FULL SCALE)

.••••

6-3

BIPOLAR OFFSET ADJUST

(+/-5V

RANGE)

• • . •

6-3

BIPOLAR GAIN ADJUST

(+/-5V

RANGE)

••.••••

6-4

BIPOLAR OFFSET ADJUST

(+/-2.5V

RANGE)

.••..

6-4

BIPOLAR GAIN ADJUST

(+/-2.5V

RANGE)

. • . •

6-4

EXAMPLE

PROGRAMS

INTRODUCTION • .

EXAMPLE

PROGRAM

1

EXAMPLE

PROGRAM

2

BOARD

ASSEMBLY

DRAWING

iv

. . . . .

7-1

. . . . . . .

7-1

. . . . . .

7-3

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3-1

4-1

4-2

4-3

5-1

5-2

5-3

6-1

FIGURES

BASE ADDRESS SELECTION

OF

220H

. • . .

CONNECTION

OF

THE

DT2814

TO

SOME

DATA

TRANSLATION

SCREW

TERMINAL/SIGNAL

CONDITIONING PANELS . . . . . . . • . . . .

CONNECTION

OF

THE

DT2814

TO

THE

DT70-1-20

SCREW

TERMINAL

PANEL

. • . • . . . . •

SINGLE-ENDED CONNECTION

SCHEME

. . . .

CONTROL

REGISTER • .

STATUS REGISTER . . . .

A/D

DATA

REGISTER . . .

CONNECTION

OF

A

VOLTMETER

TO

THE

DT2814

v

3-5

4-5

4-7

5-2

5-4

S-6

6-2

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TABLES

3-1

SELECTION

OF

THE

INPUT

RANGE

. . . . . . .

3-6

3-2

BASE

FREQUENCIES

OF

THE

ON-BOARD

CLOCK

. .

3-6

3-3

SELECTION

OF

THE

INTERRUPT

REQUEST

LEVEL

.

3-7

3-4

DT2814

JUMPER

SUMMARY

. . . . . . . . . .

3-7

4-1

P1

ASSIGNMENTS

. .

...••.

4-2,

4-3

4-2

J1

ASSIGNMENTS

. . . . . . . . . . . .

4-4

5-1

DT2814 REGISTERS . • . . . . . . . .

5-1

5-2

SOFTWARE

SELECTED

CLOCK

FREQUENCIES

. . •

5-2

5-3

A/D

CHANNEL

SELECTION . . . . . . . .

5-3

6-1

DATA

CODING

VALUES

FOR

UNIPOLAR

INPUTS . .

6-3

6-2

DATA

CODING

VALUES

FOR

BIPOLAR INPUTS . .

6-3

vi

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PREFACE

This

manual

is

written

for

the

users

of

Data

Translation

DT2814

analog

to

digital

converter

board.

The

folowing

list

provides

summeries

of

all

sections

in

the

manual.

CHAPTER 1 - INTRODUCTION

Provides

an

overview

on

the

DT2814

board

and

indicates

CHAPTER

2 -

SPECIFICATIONS

Gives

the

complete

electrical

and

mechanical

specifications

for

the

DT2814

board

and

accessories

used

with

it.

CHAPTER

3 - UNPACKING

AND

CONFIGURATION

Gives

instructions

on

how

to

unpack

the

board

and

how

to

configure

it

for

a

specific

user

application.

CHAPTER

4 -

Describes

the

interconnections

of

DT2814

with

the

host

computer

system

and

acquisition

accessories.

Provides

a

diagram

of

single-ended

connection

scheme.

CHAPTER

5 - ARCHITECTURE

AND

OPERATION

the

data

the

Discusses

the

main

elements

of

the

architecture

and

operation.

Describes

DT2814

the

and

registers,

functions

of

the

register

bits,

initializatiion

and

A/D

conversion

processes,

provides

a

programming

sequence.

CHAPTER

6 - CALIBRATION

Describes

the

calibration

of

the

DT28~4

board

in

unipolar

or

bipolar

input

ranges.

CHAPTER

7 -

EXAMPLE

PROGRAMS

Provides

two

example

programs.

vii

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APPENDIX A -

BOARD

ASSEMBLY

DIAGRAM

Gives

the

board

assembly

diagram

of

the

DT2814.

viii

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CHAPTER

1

INTRODUCTION

1.1

OVERVIEW

The

Data

Translation

DT2814

is

a

low

cost,

half-size

analog

to

digital

converter

board

which

offers

a

complete,

IBM

PC

compatible

data

acquisition

system

for

laboratory

research

and

industrial

control

applications.

The

DT2814

plugs

into

a

single

I/0

expansion

slot

of

the

IBM

PC/XT/AT

computer

or

compatible

backplane.

It

acquires

analog

signals

from

user

inputs

and

converts

them

into

a

digital

code

which

can

be

processed

by

the

host

microcomputer.

The

A/D

conversion

is

accomplished

by

a

12-bit

monolithic

converter

capable

of

up

to

25kHz

throughput

(25,000

conversions

per

second).

An

on-board

clock

with

programmable

frequencies

can

be

used

to

issue

conversion

triggers.

The

DT2814

provides

16

single-ended

input

channels.

It

can

be

configured

for

unipolar

or

bipolar

input

ranges

of

+/-SV,

0

to

+5V,

and

+/-2.5V.

Output

coding

is

straight

binary

for

unipolar

input

ranges

and

offset

binary

for

bipolar

input

ranges.

Interrupts

to

the

processor

can

be

generated

at

the

completion

of

an

A/D

conversion.

The

interrupt

level

is

jumper-selectable.

The

DT2814

operates

from

the

+5V,

+12V,

and

-12V

on

the

IBM

PC

bus.

1.2

ACCESSORIES

A

wide

range

of

signal

panels

can

be

used

acquisition

accessories.

~ompatible

accessories

follows:

DT701-20

conditioning/screw

terminal

with

the

DT2814

as

data

A

brief

description

of

from

Data

Translation

This

is

a

universal

screw

terminal

panel

which

1-1

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INTRODUCTION

ACCESSORIES

provides

convenient

connection

points

to

the

input

channels.

It

also

provides

blank

pads

for

user-supplied

passive

signal

conditioning

components.

DT709-S

This

is

a

16-channel

single-ended

terminal

panel.

It

provides

+/-20V

protection.

DT709-Y

screw

input

This

signal

conditioning

panel

provides

a

differential

interface

to

the

16

single-ended

input

channels

of

the

DT2814.

It

contains

a

differential

amplifier

at

each

input

for

common

mode

rejection

of

+/-20V.

The

DT709-Y

obtains

+12V

and

-12V

power

from

the

J1

connector

of

the

DT2814

board.

DT709-M

This

is

a

current

input

version

of

the

DT709-Y.

It

converts

0

to

20mA

inputs

to

0

to

SV

using

a

250

ohm

current

shunt

resistor.

DT756-Y

This

board

is

designed

for

thermocouple,

bridge,

and

low

level

inputs.

It

provides

16

differential

inputs

and

16

single-ended

outputs,

and

effectively

makes

the

DT2814

analog

inputs

differential.

The

board

provides

common mode

rejection

of

+/-SV.

The

DT756-Y

obtains

the

+12V

and

-12V

power

from

the

J1

connector

of

the

DT2814

board.

DT750

Backplane/DT6700

Series

Modules

The

DT750

signal

conditioning

backplane

accommodates

up

to

16

DT6700

series

isolated

signal

conditioning

modules.

One

module

is

required

for

each

input

channel.

Each

module

provides

isolation

and

one

of

the

following

input

types:

differential

voltage

input;

current

loop

input;

RTD

or

bridge

completion

input;

tachometer

input;

or

thermocouple

input.

The

20-conductor

EP047

cable

assembly

is

used

to

connect

the

screw

terminal

panels

and

signal

conditioning

accessories

to

the

DT2814

board.

1-2

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CHAPTER

2

SPECIFICATIONS

2.1

INTRODUCTION

This

chapter

lists

the

specifications

of

the

DT2814

board.

Unless

noted

otherwise,

the

specifications

are

typical

at

+25

degrees

C

and

rated

voltage.

2.2

ANALOG

INPUTS

Number

of

Analog

Inputs

Input

Ranges

(Jumper-selectable)

Output

Data

Codes

Gain

Input

Impedance

Off

Channel

On

Channel

2-1

16

single-ended

0

to

+5.00V

(unipolar)

+/-S.OOV,

+/-2.5V,

(bipolar)

straight

binary

(unipolar)

or

offset

binary

(bipolar)

1

(fixed)

>10

megohms,

10pF

in

parallel;

>10

megohms,

100pF

in

parallel

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SPECIFICATIONS

ANALOG

INPUTS

Bias

Current

Maximum

Input

Voltage

Without

Damage,

Power

On

Maximum

Input

Voltage

Without

Damage,

Power

Off

ACCURACY

Resolution

Nonlinearity

Differential

Nonlinearity

Inherent

Quantizing

Error

System

Accuracy

Channel

Crosstalk

Gain

Error

Zero

Error

DYNAMIC

PERFORMANCE

Channel

Acquisition

Time

A/D

Conversion

Time

A/D

Converter

Throughput

Dynamic

Error

THERMAL

CHARACTERISTICS

A/D

Zero

Drift

Unipolar

Bipolar

Gain

Drift

Differential

Linearity

Drift

c

Monotonicity

2-2

+/-lOOnA

+/-30V

+/-20V

12

bits

Less

than

+/-1/2

LSB

Less

than

+/-1/2

LSB

+/-1/2

LSB

Within

+/-.03%

FSR

-80dB

at

1kHz

Adjustable

to

0

Adjustable

to

0

8

microseconds

30

microseconds

25kHz

+/-.75

LSB

for

a

lOV

change

(max)

20

microvolts;deg.

C

17ppm

of

FSR/deg.

C

30ppm

of

FSR/deg.

C

+/-3ppm

of

FSR/deg.

0

to

+50

deg.

c

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2.3

ON-BOARD

CLOCK

Base

Frequencies

Selectable

Clock

Frequencies

Divisor

usable

Frequencies

2-3

SPECIFICATIONS

ON-BOARD

CLOCK

SO

to

600kHz

O.OOSHz

to

600kHz

1

to

10,000,000

in

decade

increments

O.OOSHz

to

20kHz

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SPECIFICATIONS

INTERFACE CHARACTERISTICS

2.4

INTERFACE CHARACTERISTICS

Compatible

Bus

Interface

Type

Bus

Loading

Number

of

Locations

Occupied

Factory-Assigned

Base

Address

Interrupt

Options

Interrupt

Source

Analog

Data

Format

Data

Path

2-4

IBM

PC/XT/AT

I/O

mapped

address

Presents

1

busload

2

bytes

220H

Jumper-selectable

to

level

3,

4,

5,

6,

or

7

Finish

bit

(A/D

conversion

done)

12-bit

A/D

data

left

hand

justified

8

bits

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2.5

POWER

REQUIREMENTS

Power

Requirements

+5V

+12V

-12V

2.6

PHYSICAL/ENVIRONMENTAL

Dimensions

Weight

Maximum

Altitude

Operating

Temperature

Range

Storage

Temperature

Range

Humidity

2.7

CONNECTORS

AND

CABLES

20-pin

J1

Connector

Cable

Assembly

2-5

SPECIFICATIONS

POWER

REQUIREMENTS

+/-10%

@138mA

+/-10%

@22mA

+/-10%

@29mA

4.23"

X

4.23"

10.75

X

1075cm

3.5

ounces

(98g)

7,500

feet

(2286m)

0

to

+50

deg.

C

-25

to

+70

deg.

C

To 95%,

non-condensing

3M

No.

3493-2003

compatible

connector:

3M-3421

EP047:

20-conductor,

flat

ribbon,

8ft.

EP047-1:

18"

version

...

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SPECIFICATIONS

COMPATIBLE

SCREW

TERMINAL

PANELS

2.8

COMPATIBLE

SCREW

TERMINAL

PANELS

Screw

Terminal

Panels

2-6

DT701-20,DT709-S,

DT709-M,

DT756-Y,

DT750/6700

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CHAPTER

3

UNPACKING

AND

CONFIGURATION

3.1

INTRODUCTION

This

chapter

consists

of

two

parts.

The

first

explains

how

to

unpack

the

shipped

board.

second

part

discusses

the

configuration

user-selectable

parameters

which

should

be

prior

to

installing

the

board.

3.2

UNPACKING

part

The

of

done

Inspect

the

shipping

carton

immediately

upon

receipt

for

evidence

of

mishandling

during

transit.

Depending

on

the

condition

of

the

shipping

carton,

proceed

as

outlined

in

the

sections.

3.2.1

NO

APPARENT

DAMAGE

If

no

visible

damage

is

found,

proceed

as

follows:

1.

Place

the

container

on

a

stable

surface

and

cut

the

shipping

tape.

2 .

Grasp

the

underneath

the

top.

front

of

the

flat

carton

and

lift

forward

and

up

to

open

3.

While

placing

one

hand

firmly

on

a

metal

portion

of

the

system

chassis,

remove

the

item

from

the

styrofoam

chips.

This

will

prevent

any

damage

to

the

board

components

from

possible

static

electricity

build-up

during

transit.

3-1

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UNPACKING

AND

CONFIGURATION

UNPACKING

4.

After

allowing

a

moment

for

the

discharge

of

any

static

electricity

into

the

host

microcomputer

chassis,

carefully

unwrap

the

board

or

component

from

the

anti-static

bag.

5.

Examine

the

item

again

for

any

possible

damage.

If

any

sign

of

damage

is

encountered,

proceed

as

detailed

in

the

3.2.2

VISIBLE

DAMAGE

If

the

item

container

shows

any

visible

damage,

open

it

in

the

presence

of

the

delivering

carrier's

agent.

Then

proceed

to

unpack

it

from

the

shipping

container

as

detailed

in

the

Then:

1.

Examine

the

item

for

shipping

damage.

If

damage

is

detected,

do

NOT

perform

any

repair

or

installation

of

the

damaged

item.

If

the

delivery

carrier's

agent

was

not

present

during

unpacking,

call

for

an

insurance

claim

inspection.

2.

Have

the

insurance

agent

inspect

the

damage

and

arrive

at

an

agreement

to

repair

or

replace

the

damaged

item.

3.

If

the

item

is

to

be

repaired,

call

or

write:

Customer

Service

Department

Data

Translation,

Inc.

100

Locke

Drive

Marlboro,

MA

01752-1192

Tel:

(617)

481-3700

Telex:

951-646

4.

Request

a

Return

Material

Authorization

(RMA)

number.

This

must

be

obtained

before

any

item

will

be

accepted

for

return.

5.

Repackage

the

?amaged

item

in

the

anti-static

wrapp1ng

and

place

it

in

its

original

shipping

material

or

a

secure

container

for

shipment

back

to

the

factory.

3-2

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----

----------~------

----~----------------

--~--~-

UNPACKING

AND

CONFIGURATION

UNPACKING

NOTE

Ensure

that

the

item

is

wrapped

in

anti-static

(electrically

conductive)

packaging,

and

that

it

is

handled

with

ground

protection.

Static

electricity

is

potentially

damaging

to

electrical

components

on

Data

Translation

products.

6.

Return

the

damaged

item,

with

the

RMA

number,

to

the

address

above.

3-3

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Data Translation DT2814 User manual

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