National Instruments BNC-208X Series Manual de usuario

BNC-208X Series

User Manual

Analog BNC Breakout Boards

September 1993 Edition

Part Number 320407-01

National Instruments Corporate Headquarters

6504 Bridge Point Parkway

Austin, TX 78730-5039

(512) 794-0100

Technical support fax: (800) 328-2203

(512) 794-5678

Branch Offices:

Australia (03) 879 9422, Austria (0662) 435986, Belgium 02/757.00.20, Canada (Ontario) (519) 622-9310,

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Germany 089/741 31 30, Italy 02/48301892, Japan (03) 3788-1921, Mexico 95 800 010 0793,

Netherlands 03480-33466, Norway 32-84 84 00, Singapore 2265886, Spain (91) 640 0085, Sweden 08-730 49 70,

Switzerland 056/20 51 51, Taiwan 02 377 1200, U.K. 0635 523545

Limited Warranty

The BNC-208X Series boards are 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

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.

Preface

This manual describes the electrical and mechanical aspects of the BNC-2080 and

BNC-2081 boards and contains information about installing and making connections to the boards.

The BNC-208X Series boards are analog breakout boards with BNC-style connectors. These

breakout boards connect to the National Instruments multifunction data acquisition boards for the

IBM PC/XT/AT, Personal System/2, and compatible computers, and Macintosh NuBus computers.

Organization of This Manual

The BNC-208X Series User Manual is organized as follows:

• Chapter 1, Introduction, describes the BNC-208X Series boards; lists the contents of your

BNC-2080 and BNC-2081 kits; describes the optional equipment, signal conditioning

accessories, and software support; and explains how to unpack your BNC-208X Series board.

• Chapter 2, BNC-2080 Board,describes the BNC-2080 board in detail, including its function,

specifications, compatibility, connection, mounting, and application notes.

• Chapter 3, BNC-2081 Board, describes the BNC-2081 board in detail, including its function,

specifications, compatibility, connection, mounting, and application notes.

• Chapter 4, Installation and Connections, explains how to install and make connections to the

BNC-208X Series boards.

• TheCustomer Communication appendix contains forms you can use to request help from

National Instruments or to comment on our products.

• The Index contains an alphabetical list of key terms and topics in this manual, including the

page where you can find each one.

Conventions Used in This Manual

The following conventions are used in this manual:

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

concept.

Lab board Lab board refers to the Lab-PC, Lab-PC+, Lab-NB, and Lab-LC boards.

Macintosh NuBus Macintosh NuBus refers to the Macintosh NuBus family of computers.

MIO-16 MIO-16 refers to the AT-MIO-16, AT-MIO-16D, AT-MIO-16F-5,

AT-MIO-16X, MC-MIO-16, NB-MIO-16, NB-MIO-16X, and

PC-LPM-16 boards.

Preface

BNC-208X Series User Manual vi © National Instruments Corporation

PC PC refers to PC/XT/AT/EISA and IBM PS/2 computers.

SC-205X SC-205X refers to the SC-2050, SC-2051, SC-2052, and SC-2053 boards.

SC-206X SC-206X refers to the SC-2060, SC-2061, and SC-2062 boards.

SC-207X SC-207X refers to the SC-2070, SC-2071, and SC-2072 boards.

Abbreviations

The following metric system prefixes are used with abbreviations for units of measure in this

manual:

Prefix Meaning Value

µ- micro- 10-6

m- milli- 10-3

k- kilo- 103

M- mega- 106

The following abbreviations are used in this manual:

A amperes

C Celsius

dB decibels

°degrees

F farads

fccutoff frequency

Hz hertz

in. inches

m meters

Ωohms

% percent

πpi

V volts

W watts

Acronyms

The following acronyms are used in this manual:

AC alternating current

CMRR common-mode rejection ratio

DC direct current

DGND digital ground

DIFF differential input

I/O input/output

LED light-emitting diode

NRSE nonreferenced single-ended input

RSE referenced single-ended input

VDC volts direct current

Preface

Related Documentation

The following National Instruments documents contain information that you may find helpful as

you read this manual:

•SC-205X Series User Manual (part number 320385-01)

•SC-206X Series User Manual (part number 320200-01)

•SC-207X Series User Manual (part number 320239-01)

The following National Instruments documents may also be helpful to you depending on the type of

system you are using with your BNC-208X Series boards:

• Macintosh NuBus users

-NB-MIO-16X User Manual (part number 320157-01)

-NB-MIO-16 User Manual (part number 320295-01)

-Lab-NB User Manual (part number 320174-01)

• IBM PC/XT/AT users

-AT-MIO-16F-5 User Manual (part number 320266-01)

-AT-MIO-16 User Manual (part number 320476-01)

-Lab-PC User Manual (part number 320205-01)

-Lab-PC+ User Manual (part number 320502-01)

-PC-LPM-16 User Manual (part number 320287-01)

• IBM PS/2 Micro Channel users

-MC-MIO-16 User Manual (part number 320130-01)

Customer Communication

National Instruments wants to receive your comments on our products and manuals. We are

interested in the applications you develop with our products, and we want to help if you have

problems with them. To make it easy for you to contact us, this manual contains comment and

configuration forms for you to complete. These forms are in the appendix at the end of this manual.

Contents

Chapter 1

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

What Your Kit Should Contain......................................................................................1-3

Optional Equipment.......................................................................................................1-3

Signal Conditioning Accessories...................................................................................1-4

Software Support............................................................................................................1-5

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

Chapter 2

BNC-2080 Board ................................................................................................................2-1

Power Connections ........................................................................................................2-3

Analog Input...................................................................................................................2-3

Shield Ground................................................................................................................2-5

Fuse and Power LED.....................................................................................................2-6

Digital and Timing Signals............................................................................................2-6

Specifications.................................................................................................................2-6

Analog Input ......................................................................................................2-6

Power Requirements..........................................................................................2-7

Physical..............................................................................................................2-7

Operating Environment......................................................................................2-7

Storage Environment..........................................................................................2-7

Board-to-Board Cabling.................................................................................................2-7

Mounting........................................................................................................................2-9

Application Notes ..........................................................................................................2-9

Soldering and Desoldering on the BNC-2080 Board.........................................2-9

Channel Configurations.....................................................................................2-9

MIO-16 Analog Input............................................................................2-9

Connecting Nonreferenced (or Floating) Signal Sources..................................2-13

Differential Inputs..................................................................................2-13

Single-Ended Inputs...............................................................................2-14

Connecting Ground-Referenced Signal Sources................................................2-15

Differential Inputs..................................................................................2-15

Single-Ended Inputs...............................................................................2-15

Building Lowpass Filters...................................................................................2-15

Building Highpass Filters...................................................................................2-17

Building Attenuators (Voltage Dividers)...........................................................2-20

PC-LPM-16............................................................................................2-22

MIO-16 Analog Output..........................................................................2-23

Chapter 3

BNC-2081 Board.................................................................................................................3-1

Analog Input ..................................................................................................................3-2

Shield Ground................................................................................................................3-4

Fuse and Power LED.....................................................................................................3-5

Digital and Timing Signals............................................................................................3-5

Contents

BNC-208X Series User Manual x © National Instruments Corporation

Specifications.................................................................................................................3-5

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

Power Requirements..........................................................................................3-5

Physical..............................................................................................................3-6

Operating Environment......................................................................................3-6

Storage Environment..........................................................................................3-6

Board-to-Board Cabling.................................................................................................3-6

Mounting........................................................................................................................3-8

Application Notes ..........................................................................................................3-8

Soldering and Desoldering on the BNC-2081 Board.........................................3-8

Connecting Nonreferenced (or Floating) Signal Sources..................................3-8

Connecting Ground-Referenced Signal Sources................................................3-8

Building Lowpass Filters...................................................................................3-9

Building Highpass Filters...................................................................................3-11

Building Attenuators (Voltage Dividers)...........................................................3-12

Lab Board Analog Output..............................................................................................3-14

Chapter 4

Installation and Connections..........................................................................................4-1

Hardware Installation.....................................................................................................4-1

Hardware Installation for the BNC-2080 and the BNC-2081............................4-1

Installing the SC-205X Series Cable Adapter Boards.......................................4-2

Installing the SC-207X General-Purpose Termination Breadboards.................4-2

Rack Mounting...................................................................................................4-2

External Power Connection (If Necessary)........................................................4-5

BNC-208X Series Board Connection................................................................4-6

Signal Connections ........................................................................................................4-7

Ribbon-Cable Connectors..................................................................................4-7

Rack-Mount Chassis Cover Attachment............................................................4-7

Appendix

Customer Communication...............................................................................................A-1

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

Figures

Figure 1-1. BNC-2080 Board Directly Connected to an MIO-16 Board............................1-2

Figure 1-2. BNC-208X, SC-207X, SC-206X, and SC-205X Series Boards

Connected to an MIO-16 Board.......................................................................1-2

Figure 2-1. BNC-2080 Analog Breakout Board..................................................................2-1

Figure 2-2. BNC-2080 Board Parts Locator Diagram.........................................................2-2

Figure 2-3. Onboard Equivalent Circuit for DIFF Mode....................................................2-4

Figure 2-4. W2 Jumper Settings..........................................................................................2-5

Figure 2-5. Direct Connection between an MIO-16 Board and the BNC-2080 Board.......2-8

Contents

Figure 2-6. Connection between an MIO-16 Board, the BNC-2080 Board, and

the SC-2070/72 Board or the MIO-16, and the BNC-2080 and

SC-206X Series Boards via the SC-2050 Board..............................................2-8

Figure 2-7. Switch Configurations for Differential Mode or Single-Ended Mode.............2-10

Figure 2-8. W1 Ground Reference Jumper.........................................................................2-10

Figure 2-9. BNC-2080 Switch Configurations for an MIO-16 Configured in

DIFF Mode (Factory Default Setting)..............................................................2-11

Figure 2-10. BNC-2080 Switch Configurations for an MIO-16 Configured in

RSE and NRSE Modes.....................................................................................2-12

Figure 2-11. Bias Return Resistor for DC-Coupled Floating Source on Channel 1

in DIFF Mode...................................................................................................2-14

Figure 2-12. Normalized Frequency Response of Lowpass Filter........................................2-16

Figure 2-13. Lowpass Filter on Differential Channel 1........................................................2-17

Figure 2-14. Normalized Frequency Response of Highpass Filter.......................................2-18

Figure 2-15. Highpass Filter on Differential Channel 1........................................................2-19

Figure 2-16. Attenuator for Use with Differential Inputs......................................................2-21

Figure 2-17. Switch Configurations for SE Mode (PC-LPM-16).........................................2-22

Figure 2-18. Ground Reference Jumper Position for Use with the PC-LPM-16..................2-23

Figure 2-19. Analog Output Schematic for DACs, DAC0 OUT Shown.............................2-23

Figure 3-1. BNC-2081 Analog Breakout Board..................................................................3-1

Figure 3-2. BNC-2081 Board Parts Locator Diagram.........................................................3-2

Figure 3-3. Onboard Equivalent Circuit..............................................................................3-3

Figure 3-4. W1 Jumper Settings..........................................................................................3-4

Figure 3-5. Direct Connection between a Lab Board and the BNC-2081 Board................3-7

Figure 3-6. Connection between a Lab Board, the BNC-2081, and the SC-2071 Board,

or the Connection between a Lab Board, the BNC-2081 and the SC-206X

Series Board, via the SC-2053 Board...............................................................3-7

Figure 3-7. Normalized Frequency Response of Lowpass Filter........................................3-9

Figure 3-8. Lowpass Filter on Channel 1............................................................................3-10

Figure 3-9. Normalized Frequency Response of Highpass Filter.......................................3-11

Figure 3-10. Highpass Filter on Channel 1 ...........................................................................3-12

Figure 3-11. Attenuator for Use with BNC-2081 Board Inputs............................................3-13

Figure 3-12. DAC0 OUT Schematic.....................................................................................3-14

Figure 3-13. Analog Output Schematic for DACs, DAC0 OUT Shown.............................3-14

Figure 4-1. Mounting Locations for the BNC-208X Series Board and SC-207X

Series Board......................................................................................................4-3

Figure 4-2. Mounting Locations for the BNC-208X Series Board and SC-205X

Series Board or SC-206X Series Board............................................................4-3

Figure 4-3. Attaching a Mountable Board to the Chassis ...................................................4-4

Figure 4-4. Double-Height Mounting..................................................................................4-5

Figure 4-5. Connections between Data Acquisition Boards and BNC-208X

Series Boards and between SC-205X Series Boards and BNC-2080

and BNC-2081 Boards......................................................................................4-6

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