National Instruments Low-Cost Multifunction I/O Board for ISA... Manual de usuario

Lab-PC+

User Manual

Low-Cost Multifunction I/O Board for ISA

June 1996 Edition

Part Number 320502B-01

National Instruments Corporate Headquarters

6504 Bridge Point Parkway

Austin, TX 78730-5039

(512) 794-0100

Technical support fax: (512) 794-5678

Branch Offices:

Australia 03 9 879 9422, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Canada (Ontario) 519 622 9310,

Canada (Québec) 514 694 8521, Denmark 45 76 26 00, Finland 90 527 2321, France 1 48 14 24 24,

Germany 089 741 31 30, Hong Kong 2645 3186, Italy 02 413091, Japan 03 5472 2970, Korea 02 596 7456,

Mexico 95 800 010 0793, Netherlands 0348 433466, Norway 32 84 84 00, Singapore 2265886, Spain 91 640 0085,

Sweden 08 730 49 70, Switzerland 056 200 51 51, Taiwan 02 377 1200, U.K. 01635 523545

Warranty

The Lab-PC+ board 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®, RTSI®, and SCXI™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 ...........................................................................................................xi

Organization of the Lab-PC+ User Manual..................................................................xi

Conventions Used in This Manual.................................................................................xii

National Instruments Documentation ............................................................................xiii

Customer Communication .............................................................................................xiii

Chapter 1

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

About the Lab-PC+ ........................................................................................................1-1

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

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

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

NI-DAQ Driver Software...................................................................................1-2

Optional Equipment .......................................................................................................1-4

Unpacking ......................................................................................................................1-4

Chapter 2

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

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

PC Bus Interface ................................................................................................2-1

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

DMA Channel Selection ....................................................................................2-6

Interrupt Selection..............................................................................................2-7

Analog I/O Configuration ..............................................................................................2-8

Analog Output Configuration ............................................................................2-9

Bipolar Output Selection........................................................................2-9

Unipolar Output Selection .....................................................................2-10

Analog Input Configuration...............................................................................2-10

Input Mode.............................................................................................2-10

DIFF Input (Four Channels) ..................................................................2-11

RSE Input (Eight Channels, Factory Setting) ........................................2-12

NRSE Input (Eight Channels)................................................................2-13

Analog Input Polarity Configuration .................................................................2-13

Bipolar Input Selection ..........................................................................2-13

Unipolar Input Selection ........................................................................2-14

Hardware Installation.....................................................................................................2-15

Contents

Lab-PC+ User Manual vi © National Instruments Corporation

Chapter 3

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

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

Signal Connection Descriptions.........................................................................3-2

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

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

Floating Signal Sources .....................................................................................3-5

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

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

Differential Connection Considerations (DIFF Configuration).........................3-6

Differential Connections for Grounded Signal Sources ....................................3-7

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..............................................3-12

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

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

Port C Pin Connections..........................................................................3-15

Timing Specifications ............................................................................3-16

Mode 1 Input Timing .............................................................................3-18

Mode 1 Output Timing ..........................................................................3-19

Mode 2 Bidirectional Timing.................................................................3-20

Timing Connections...........................................................................................3-21

Data Acquisition Timing Connections...................................................3-21

General-Purpose Timing Signal Connections and

General-Purpose Counter/Timing Signals .............................................3-24

Cabling...........................................................................................................................3-28

Chapter 4

Theory of Operation ..........................................................................................................4-1

Functional Overview......................................................................................................4-1

PC I/O Channel Interface Circuitry ...............................................................................4-2

Analog Input and Data Acquisition Circuitry................................................................4-4

Analog Input Circuitry.......................................................................................4-5

Data Acquisition Timing Circuitry ....................................................................4-5

Single-Channel Data Acquisition...........................................................4-6

Multiple-Channel (Scanned) Data Acquisition......................................4-6

Data Acquisition Rates...........................................................................4-7

Analog Output Circuitry ................................................................................................4-9

Digital I/O Circuitry.......................................................................................................4-10

Timing I/O Circuitry ......................................................................................................4-11

Contents

Chapter 5

Calibration.............................................................................................................................5-1

Calibration Equipment Requirements............................................................................5-1

Calibration Trimpots......................................................................................................5-2

Analog Input Calibration ...............................................................................................5-3

Board Configuration ..........................................................................................5-4

Bipolar Input Calibration Procedure..................................................................5-4

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

Analog Output Calibration.............................................................................................5-6

Board Configuration ..........................................................................................5-6

Bipolar Output Calibration Procedure ...............................................................5-6

Unipolar Output Calibration Procedure .............................................................5-8

Appendix A

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

Appendix B

OKI 82C53 Data Sheet .....................................................................................................B-1

Appendix C

OKI 82C55A Data Sheet .................................................................................................C-1

Appendix D

Appendix E

Appendix F

Customer Communication...............................................................................................F-1

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

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

Contents

Lab-PC+ User Manual viii © National Instruments Corporation

Figures

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

NI-DAQ, and Your Hardware............................................................................1-3

Figure 2-1. Parts Locator Diagram .......................................................................................2-2

Figure 2-2. Example Base I/O Address Switch Settings ......................................................2-4

Figure 2-3. DMA Jumper Settings for DMA Channel 3 (Factory Setting) ..........................2-6

Figure 2-4. DMA Jumper Settings for Disabling DMA Transfers.......................................2-7

Figure 2-5. Interrupt Jumper Setting IRQ5 (Factory Setting) ..............................................2-7

Figure 2-6. Interrupt Jumper Setting for Disabling Interrupts..............................................2-8

Figure 2-7. Bipolar Output Jumper Configuration (Factory Setting) ...................................2-9

Figure 2-8. Unipolar Output Jumper Configuration .............................................................2-10

Figure 2-9. DIFF Input Configuration ..................................................................................2-12

Figure 2-10. RSE Input Configuration ...................................................................................2-12

Figure 2-11. NRSE Input Configuration.................................................................................2-13

Figure 2-12. Bipolar Input Jumper Configuration (Factory Setting)......................................2-14

Figure 2-13. Unipolar Input Jumper Configuration................................................................2-14

Figure 3-1. Lab-PC+ I/O Connector Pin Assignments.........................................................3-2

Figure 3-2. Lab-PC+ Instrumentation Amplifier..................................................................3-5

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

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

Figure 3-5. Single-Ended Input Connections for Floating Signal Sources...........................3-11

Figure 3-6. Single-Ended Input Connections for Grounded Signal Sources........................3-12

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

Figure 3-8. Digital I/O Connections .....................................................................................3-15

Figure 3-9. EXTCONV* Signal Timing...............................................................................3-21

Figure 3-10. Posttrigger Data Acquisition Timing Case 1 .....................................................3-22

Figure 3-11. Posttrigger Data Acquisition Timing Case 2 .....................................................3-22

Figure 3-12. Pretrigger Data Acquisition Timing...................................................................3-23

Figure 3-13. EXTUPDATE* Signal Timing for Updating DAC Output...............................3-24

Figure 3-14. EXTUPDATE* Signal Timing for Generating Interrupts .................................3-24

Figure 3-15. Event-Counting Application with External Switch Gating................................3-25

Figure 3-16. Frequency Measurement Application ................................................................3-26

Figure 3-17. General-Purpose Timing Signals .......................................................................3-27

Figure 4-1. Lab-PC+ Block Diagram ...................................................................................4-1

Figure 4-2. PC I/O Interface Circuitry Block Diagram ........................................................4-3

Figure 4-3. Analog Input and Data Acquisition Circuitry Block Diagram ..........................4-4

Figure 4-4. Analog Output Circuitry Block Diagram...........................................................4-9

Figure 4-5. Digital I/O Circuitry Block Diagram .................................................................4-10

Figure 4-6. Timing I/O Circuitry Block Diagram.................................................................4-12

Figure 4-7. Two-Channel Interval-Scanning Timing ...........................................................4-13

Figure 4-8. Single-Channel Interval Timing.........................................................................4-14

Figure 4-9. Counter Block Diagram .....................................................................................4-14

Figure 5-1. Calibration Trimpot Location Diagram .............................................................5-2

Figure E-1. Control-Word Format with Control-Word Flag Set to 1 ...................................E-24

Figure E-2. Control-Word Format with Control-Word Flag Set to 0 ...................................E-24

Contents

Tables

Table 2-1. PC Bus Interface Factory Settings .....................................................................2-3

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

Base I/O Address Space.....................................................................................2-5

Table 2-3. DMA Channels for the Lab-PC+ .......................................................................2-6

Table 2-4. Analog I/O Jumper Settings...............................................................................2-9

Table 2-5. Input Configurations Available for the Lab-PC+ ..............................................2-11

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

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

Table 3-2. Port C Signal Assignments ................................................................................3-16

Table 4-1. Analog Input Settling Time Versus Gain...........................................................4-7

Table 4-2. Lab-PC+ Maximum Recommended Data Acquisition Rates ............................4-8

Table 4-3. Bipolar Analog Input Signal Range Versus Gain..............................................4-8

Table 4-4. Unipolar Analog Input Signal Range Versus Gain............................................4-8

Table 5-1. Voltage Values of ADC Input............................................................................5-4

Table D-1. Lab-PC+ Register Map ......................................................................................D-2

Table E-1. Unipolar Input Mode A/D Conversion Values (Straight Binary Coding) .........E-4

Table E-2. Bipolar Input Mode A/D Conversion Values (Two’s Complement Coding)....E-4

Table E-3. Analog Output Voltage Versus Digital Code

(Unipolar Mode, Straight Binary Coding) .........................................................E-21

Table E-4. Analog Output Voltage Versus Digital Code

(Bipolar Mode, Two’s Complement Coding)....................................................E-22

Table E-5. Mode 0 I/O Configurations................................................................................E-26

Table E-6. Port C Set/Reset Control Words ........................................................................E-33

About This Manual

This manual describes the electrical and mechanical aspects of the Lab-PC+ and contains

information concerning its operation and programming.

The Lab-PC+ is a low-cost multifunction analog, digital, and timing I/O board for PC compatible

computers.

Organization of the Lab-PC+ User Manual

The Lab-PC+ User Manual is organized as follows:

• Chapter 1, Introduction, describes the Lab-PC+; lists what you need to get started; describes

the optional software and optional equipment; and explains how to unpack the Lab-PC+.

• Chapter 2, Configuration and Installation, describes the Lab-PC+ jumper configuration and

installation of the Lab-PC+ board in your computer.

• Chapter 3, Signal Connections, describes how to make input and output signal connections to

your Lab-PC+ board via the board I/O connector.

• Chapter 4, Theory of Operation, contains a functional overview of the Lab-PC+ and explains

the operation of each functional unit making up the Lab-PC+. This chapter also explains the

basic operation of the Lab-PC+ circuitry.

• Chapter 5, Calibration, discusses the calibration procedures for the Lab-PC+ analog input

and analog output circuitry.

• Appendix A, Specifications, lists the specifications of the Lab-PC+.

• Appendix B, OKI 82C53 Data Sheet, contains the manufacturer data sheet for the

OKI 82C53 System Timing Controller integrated circuit (OKI Semiconductor). This circuit

is used on the Lab-PC+.

• Appendix C, OKI 82C55A Data Sheet, contains the manufacturer data sheet for the

OKI 82C55A Programmable Peripheral Interface integrated circuit (OKI Semiconductor).

This circuit is used on the Lab-PC+.

• Appendix D, Register Map and Descriptions, describes in detail the address and function of

each of the Lab-PC+ registers.

• Appendix E, Register-Level Programming, contains important information about

programming the Lab-PC+.

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

National Instruments or to comment on our products and manuals.

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