National Instruments AT-MIO-16 Manual de usuario

AT-MIO-16

User Manual

Multifunction I/O Board for the PC/AT

February 1995 Edition

Part Number 320476-01

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Limited Warranty

The AT-MIO-16 is warranted against defects in materials and workmanship for a period of one year from the date of

shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace

equipment that proves to be defective during the warranty period. This warranty includes parts and labor.

The media on which you receive National Instruments software are warranted not to fail to execute programming

instructions, due to defects in materials and workmanship, for a period of 90 days from date of shipment, as

evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace software

media that do not execute programming instructions if National Instruments receives notice of such defects during

the warranty period. National Instruments does not warrant that the operation of the software shall be uninterrupted

or error free.

A Return Material Authorization (RMA) number must be obtained from the factory and clearly marked on the

outside of the package before any equipment will be accepted for warranty work. National Instruments will pay the

shipping costs of returning to the owner parts which are covered by warranty.

National Instruments believes that the information in this manual is accurate. The document has been carefully

reviewed for technical accuracy. In the event that technical or typographical errors exist, National Instruments

reserves the right to make changes to subsequent editions of this document without prior notice to holders of this

edition. The reader should consult National Instruments if errors are suspected. In no event shall National

Instruments be liable for any damages arising out of or related to this document or the information contained in it.

EXCEPT AS SPECIFIED HEREIN, NATIONAL INSTRUMENTS MAKES NO WARRANTIES, EXPRESS OR IMPLIED,

AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE. CUSTOMER'S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART

OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER.

NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA, PROFITS,

USE OF PRODUCTS, OR INCIDENTAL OR CONSEQUENTIAL DAMAGES, EVEN IF ADVISED OF THE POSSIBILITY

THEREOF. This limitation of the liability of National Instruments will apply regardless of the form of action,

whether in contract or tort, including negligence. Any action against National Instruments must be brought within

one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due

to causes beyond its reasonable control. The warranty provided herein does not cover damages, defects,

malfunctions, or service failures caused by owner's failure to follow the National Instruments installation, operation,

or maintenance instructions; owner's modification of the product; owner's abuse, misuse, or negligent acts; and

power failure or surges, fire, flood, accident, actions of third parties, or other events outside reasonable control.

Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or

mechanical, including photocopying, recording, storing in an information retrieval system, or translating, in whole or

in part, without the prior written consent of National Instruments Corporation.

Trademarks

LabVIEW®, NI-DAQ®, and RTSI®are trademarks of National Instruments Corporation.

Product and company names listed are trademarks or trade names of their respective companies.

WARNING REGARDING MEDICAL AND CLINICAL USE

OF NATIONAL INSTRUMENTS PRODUCTS

National Instruments products are not designed with components and testing intended to ensure a level of reliability

suitable for use in treatment and diagnosis of humans. Applications of National Instruments products involving

medical or clinical treatment can create a potential for accidental injury caused by product failure, or by errors on the

part of the user or application designer. Any use or application of National Instruments products for or involving

medical or clinical treatment must be performed by properly trained and qualified medical personnel, and all

traditional medical safeguards, equipment, and procedures that are appropriate in the particular situation to prevent

serious injury or death should always continue to be used when National Instruments products are being used.

National Instruments products are NOT intended to be a substitute for any form of established process, procedure, or

equipment used to monitor or safeguard human health and safety in medical or clinical treatment.

Contents

About This Manual ..........................................................................................................ix

Organization of This Manual .......................................................................................ix

Conventions Used in This Manual...............................................................................x

Related Documentation................................................................................................x

Customer Communication ...........................................................................................x

Chapter 1

Introduction .......................................................................................................................1-1

About the AT-MIO-16.................................................................................................1-1

What You Need to Get Started ....................................................................................1-1

Software Programming Choices ..................................................................................1-2

LabVIEW and LabWindows Application Software ........................................1-2

NI-DAQ Driver Software.................................................................................1-3

Unpacking ....................................................................................................................1-5

Chapter 2

Configuration and Installation.....................................................................................2-1

Board Configuration ....................................................................................................2-1

AT Bus Interface..............................................................................................2-1

Base I/O Address Selection..................................................................2-3

DMA Channel Selection ......................................................................2-4

Interrupt Selection................................................................................2-5

Analog I/O Configuration ................................................................................2-6

Analog Input Configuration.................................................................2-8

Input Mode...............................................................................2-9

DIFF Input (Eight Channels, Factory Setting).............2-9

RSE Input (16 Channels) .............................................2-9

NRSE Input (16 Channels) ..........................................2-10

Analog Input Polarity and Range.............................................2-10

Considerations for Selecting Input Ranges..................2-11

Analog Output Configuration ..............................................................2-12

Analog Output Reference.........................................................2-13

Analog Output Polarity Selection ............................................2-14

Analog Output Data Coding ....................................................2-14

Digital I/O Configuration.................................................................................2-15

RTSI Bus Clock Selection ...............................................................................2-17

Hardware Installation...................................................................................................2-17

Chapter 3

Signal Connections ........................................................................................................... 3-1

I/O Connector...............................................................................................................3-1

Signal Descriptions ..........................................................................................3-3

Contents

AT-MIO-16 User Manual vi © National Instruments Corporation

Analog Input Signal Connections ........................................................3-4

Types of Signal Sources.......................................................................3-5

Floating Signal Sources ...........................................................3-6

Ground-Referenced Signal Sources.........................................3-6

Input Configurations ............................................................................3-6

Differential Connection Considerations

(DIFF Configuration)...............................................................3-7

Differential Connections for Grounded Signal Sources ..........3-8

Differential Connections for Floating Signal Sources .............3-8

Single-Ended Connection Considerations ...............................3-10

Single-Ended Connections for Floating Signal Sources

(RSE Configuration) ................................................................3-10

Single-Ended Connections for Grounded Signal Sources

(NRSE Configuration) .............................................................3-11

Common-Mode Signal Rejection Considerations....................3-11

Analog Output Signal Connections......................................................3-12

Digital I/O Signal Connections........................................................................3-13

Timing I/O Signals...........................................................................................3-15

RTSI Bus Signal Connections..........................................................................3-15

Power Connections ..........................................................................................3-16

Timing Connections.........................................................................................3-16

Data Acquisition Timing Connections.................................................3-16

General-Purpose Timing Signal Connections......................................3-19

Cabling and Field Wiring.............................................................................................3-25

Field Wiring Considerations ............................................................................3-25

Cabling Considerations....................................................................................3-26

Chapter 4

Calibration Procedures....................................................................................................4-1

Calibration Equipment Requirements..........................................................................4-1

Calibration Trimpots....................................................................................................4-2

Analog Input Calibration .............................................................................................4-3

Board Configuration ........................................................................................4-4

Bipolar Input Calibration Procedure................................................................4-4

1. Adjust the Amplifier Input Offset...................................................4-4

2. Adjust the ADC Input Offset ..........................................................4-4

3. Adjust the Analog Input Gain .........................................................4-5

Unipolar Input Calibration Procedure..............................................................4-5

1. Adjust the Amplifier Input Offset...................................................4-5

2. Adjust the ADC Input Offset ..........................................................4-6

3. Adjust the Analog Input Gain .........................................................4-6

Analog Output Calibration...........................................................................................4-6

Board Configuration ........................................................................................4-7

Bipolar Output Calibration Procedure .............................................................4-7

1. Adjust the Analog Output Offset ....................................................4-7

2. Adjust the Analog Output Gain ......................................................4-8

Unipolar Output Calibration Procedure ...........................................................4-8

1. Adjust the Analog Output Offset ....................................................4-8

2. Adjust the Analog Output Gain ......................................................4-9

Contents

Appendix A

Specifications.......................................................................................................................A-1

Appendix B

Revisions A through C Parts Locator Diagram ....................................................B-1

Appendix C

Customer Communication ............................................................................................C-1

Glossary......................................................................................................................Glossary-1

Index ................................................................................................................................Index-1

Figures

Figure 1-1. The Relationship between the Programming Environment, NI-DAQ,

and Your Hardware..........................................................................................1-4

Figure 2-1. AT-MIO-16 Parts Locator Diagram ................................................................2-2

Figure 2-2. Example Base I/O Address Switch Settings ....................................................2-3

Figure 2-3. Analog Input and Data Acquisition Circuitry Block Diagram ........................2-8

Figure 2-4. Analog Output Circuitry Block Diagram.........................................................2-13

Figure 2-5. Digital I/O Circuitry Block Diagram ...............................................................2-16

Figure 3-1. AT-MIO-16 I/O Connector Pin Assignments..................................................3-2

Figure 3-2. AT-MIO-16 Instrumentation Amplifier...........................................................3-5

Figure 3-3. Differential Input Connections for Grounded Signal Sources.........................3-8

Figure 3-4. Differential Input Connections for Floating Signal Sources............................ 3-9

Figure 3-5. Single-Ended Input Connections for Floating Signal Sources.........................3-10

Figure 3-6. Single-Ended Input Connections for Grounded Signal Sources......................3-11

Figure 3-7. Analog Output Connections.............................................................................3-13

Figure 3-8. Digital I/O Connections ...................................................................................3-14

Figure 3-9. RTSI Bus Interface Circuitry Block Diagram..................................................3-15

Figure 3-10. EXTSTROBE* Signal Timing.........................................................................3-17

Figure 3-11. EXTCONV* Signal Timing.............................................................................3-17

Figure 3-12. STARTTRIG* Signal Timing..........................................................................3-18

Figure 3-13. STOPTRIG Signal Timing...............................................................................3-18

Figure 3-14. Timing I/O Circuitry Block Diagram...............................................................3-19

Figure 3-15. Counter Block Diagram ...................................................................................3-20

Figure 3-16. Event-Counting Application with External Switch Gating..............................3-22

Figure 3-17. Frequency Measurement Application ..............................................................3-23

Figure 3-18. General-Purpose Timing Signals .....................................................................3-24

Figure 4-1. Calibration Trimpot Location Diagram ...........................................................4-2

Figure B-1. Revisions A through C Parts Locator Diagram ...............................................B-2

Contents

AT-MIO-16 User Manual viii © National Instruments Corporation

Tables

Table 2-1. AT Bus Interface Factory-Default Settings .....................................................2-1

Table 2-2. Switch Settings with Corresponding Base I/O Address and

Base I/O Address Space...................................................................................2-4

Table 2-3. DMA Jumper Settings......................................................................................2-5

Table 2-4. Interrupt Jumper Settings.................................................................................2-5

Table 2-5. Analog I/O Jumper Settings Quick Reference.................................................2-6

Table 2-6. DIFF Input Configuration (Factory Setting)....................................................2-9

Table 2-7. RSE Input Configuration .................................................................................2-10

Table 2-8. NRSE Input Configuration...............................................................................2-10

Table 2-9. Configurations for Input Range and Input Polarity .........................................2-11

Table 2-10. Actual Range and Measurement Precision Versus Input Range

Selection and Gain ...........................................................................................2-12

Table 2-11. Internal and External Reference Selection.......................................................2-14

Table 2-12. Analog Output Polarity and Data Mode Configuration...................................2-15

Table 2-13. Output Range Selection and Precision.............................................................2-15

Table 2-14. Configurations for RTSI Bus Clock Selection.................................................2-17

Table 3-1. Recommended Input Configurations for Ground-Referenced

and Floating Signal Sources.............................................................................3-6

Table 4-1. Voltage Values for Calculating Offset Error ...................................................4-3

About This Manual

This manual describes the electrical and mechanical aspects of the AT-MIO-16 and contains

information concerning its operation and programming. The AT-MIO-16 is a high-performance

multifunction analog, digital, and timing I/O board, and is a member of the National Instruments

AT Series of expansion boards for the IBM PC AT and compatible computers. The AT-MIO-16

contains a 12-bit ADC with up to 16 analog inputs, two 12-bit DACs with voltage outputs, eight

lines of TTL-compatible digital I/O, and three 16-bit counter/timer channels for timing I/O. If

you need additional analog inputs, you can use the AMUX-64T multiplexer board, which is a

four-to-one multiplexer that can process 64 single-ended inputs. You can cascade up to four

AMUX-64Ts to obtain 256 single-ended inputs.

Organization of This Manual

The AT-MIO-16 User Manual is organized as follows:

• Chapter 1, Introduction, describes the AT-MIO-16; lists the contents of your AT-MIO-16 kit,

the optional software, and optional equipment; and explains how to unpack the AT-MIO-16.

• Chapter 2, Configuration and Installation, describes how to configure the AT-MIO-16

jumpers and how to install the AT-MIO-16 board into the PC.

• Chapter 3, Signal Connections, describes the signal connections to the AT-MIO-16 board,

and cable wiring.

• Chapter 4, Calibration Procedures, discusses the calibration procedures for the AT-MIO-16

analog input and analog output circuitry.

• Appendix A, Specifications, lists the specifications for the AT-MIO-16.

• Appendix B, Revisions A through C Parts Locator Diagram, contains the parts locator

diagram for revisions A through C of the AT-MIO-16 board.

• Appendix C, Customer Communication, contains forms you can use to request help from

National Instruments or to comment on our products.

• The Glossary contains an alphabetical list and description of terms used in this manual,

including acronyms, abbreviations, metric prefixes, mnemonics, and symbols.

• The Index alphabetically lists topics covered in this manual, including the page where you

can find the topic.

About This Manual

Conventions Used in This Manual

The following conventions are used in this manual.

bold italic Bold italic text denotes a note, caution, or warning.

italic Italic text denotes emphasis, a cross reference, or an introduction to a key

concept.

NI-DAQ NI-DAQ is used throughout this manual to refer to the NI-DAQ software

for PC compatibles unless otherwise noted.

PC PC refers to the IBM PC AT and compatible computers.

Abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms are listed in the

Glossary.

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