National Instruments 776572-00 User manual

© Copyright 1991, 1994 National Instruments Corporation.
All Rights Reserved.
SCXI-1100
User Manual
32-Channel Differential Multiplexer/Amplifier Module for Signal Conditioning
October 1994 Edition
Part Number 320637C-01

National Instruments Corporate Headquarters
6504 Bridge Point Parkway
Austin, TX 78730-5039
[phone]
Technical support fax: [phone]
[phone]
Branch Offices:
Australia [phone], Austria [phone], Belgium 02/757.00.20, Canada (Ontario) [phone],
Canada (Québec) [phone], Denmark 45 76 26 00, Finland (90) 527 2321, France (1) 48 14 24 24,
Germany 089/741 31 30, Italy 02/48301892, Japan [phone], 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 SCXI-1100 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.
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.
Copyright
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.

© National Instruments Corporation v SCXI-1100 User Manual
Contents
About This Manual...........................................................................................................xi
Organization of This Manual .......................................................................................xi
Conventions Used in This Manual...............................................................................xii
Related Documentation................................................................................................xiii
Customer Communication ...........................................................................................xiii
Chapter 1
Introduction ........................................................................................................................1-1
What Your Kit Should Contain....................................................................................1-1
Optional Software ........................................................................................................1-2
Optional Equipment .....................................................................................................1-3
Custom Cables .................................................................................................1-4
Unpacking ....................................................................................................................1-4
Chapter 2
Configuration and Installation.....................................................................................2-1
Module Configuration..................................................................................................2-1
Digital Signal Connections ..............................................................................2-3
Jumper W5 ...........................................................................................2-3
Jumper W9 ...........................................................................................2-4
Using Jumpers W5 and W9 .................................................................2-4
Jumper W11 (Revision A and B Modules Only).................................2-4
Analog Configuration ......................................................................................2-5
Grounding, Shielding, and Output Mode Selection.............................2-6
Jumper W10 .............................................................................2-6
Reference Mode Selection ...................................................................2-7
Jumper W1 ...............................................................................2-7
Filter Selection .....................................................................................2-7
Jumpers W2 through W4 .........................................................2-7
Output Selection...................................................................................2-8
Jumpers W7 and W8................................................................2-8
Input Filtering and Current Loop Receivers ........................................2-9
Hardware Installation...................................................................................................2-10
Signal Connections ......................................................................................................2-11
Front Connector ...............................................................................................2-11
Front Connector Signal Descriptions...............................................................2-13
Analog Input Channels.........................................................................2-13
Thermocouple Connections .................................................................2-16
Open Thermocouple Detection ............................................................2-17
Analog Output......................................................................................2-17
Connector-and-Shell Assembly ...........................................................2-17
SCXI-1300 Terminal Block.................................................................2-19
Terminal Block Temperature Sensor .......................................2-19
Terminal Block Jumper Configuration ....................................2-19
Terminal Block Signal Connection..........................................2-20
Terminal Block Installation ....................................................2-20
Rear Signal Connector .....................................................................................2-22
Rear Signal Connector Signal Descriptions.........................................2-23

Contents
SCXI-1100 User Manual vi © National Instruments Corporation
Analog Output Signal Connections......................................................2-24
Digital I/O Signal Connections............................................................2-24
Timing Requirements and Communication Protocol...........................2-26
Timing Signal...........................................................................2-26
Communication Signals .......................................................................2-26
Chapter 3
Theory of Operation ........................................................................................................3-1
Functional Overview....................................................................................................3-1
SCXIbus Connector .........................................................................................3-3
SCXIbus Connector Signal Descriptions.........................................................3-5
Digital Interface Circuitry............................................................................................3-7
Digital Control Circuitry..............................................................................................3-8
Analog and Timing Circuitry.......................................................................................3-9
Analog Input and Timing Circuits ...................................................................3-9
Calibration............................................................................................3-12
Analog Output Circuitry ..................................................................................3-13
Scanning Modes...........................................................................................................3-14
Single-Module Multiplexed Scanning .............................................................3-14
Single-Module Multiplexed Scanning (Direct)....................................3-14
Single-Module Multiplexed Scanning (Indirect) .................................3-15
Multiple-Module Multiplexed Scanning..........................................................3-15
Multiple-Chassis Scanning ..............................................................................3-16
Chapter 4
Register Descriptions.......................................................................................................4-1
Register Description.....................................................................................................4-1
Register Description Format ............................................................................4-1
SCXI-1100 Register Descriptions....................................................................4-1
Module ID Register..............................................................................4-2
Configuration Register.........................................................................4-3
Slot 0 Register Descriptions.............................................................................4-6
Slot-Select Register..............................................................................4-7
Hardscan Control Register (HSCR).....................................................4-8
FIFO Register.......................................................................................4-9
Chapter 5
Programming......................................................................................................................5-1
Programming Considerations.......................................................................................5-1
Notation............................................................................................................5-1
Register Writes.................................................................................................5-1
Register Selection and Write Procedure ..............................................5-2
Initialization .........................................................................................5-3
Single-Channel Measurements ........................................................................5-3
Direct Measurements ...........................................................................5-3
Indirect Measurements.........................................................................5-4
Measurements from Other Modules ........................................5-4
Measurements from the SCXI-1100 via Another Module.......5-4
Scanning Measurements ..................................................................................5-5
1. Data Acquisition Board Setup Programming..................................5-6
Counter 1 and SCANDIV ........................................................5-7
2. Module Programming .....................................................................5-8
Single-Module Multiplexed Scanning (Direct)........................5-8

Contents
© National Instruments Corporation vii SCXI-1100 User Manual
Single-Module Multiplexed Scanning (Indirect) .....................5-8
Channel Scanning from Other Modules.......................5-8
Channel Scanning from the SCXI-1100 via
Another Module ...........................................................5-8
Multiple-Module Multiplexed Scanning..................................5-9
Multiple-Chassis Scanning ......................................................5-9
3. Programming the Slot 0 Hardscan Circuitry...................................5-10
4. Acquisition Enable, Triggering, and Servicing...............................5-11
Scanning Examples......................................................................................................5-11
Example 1 ........................................................................................................5-11
Example 2 ........................................................................................................5-12
Example 3 ........................................................................................................5-13
Appendix A
Specifications......................................................................................................................A-1
Analog Input ................................................................................................................A-1
Explanation of Analog Input Specifications ....................................................A-2
Physical ........................................................................................................................A-3
Cold-Junction Sensor ...................................................................................................A-3
Operating Environment................................................................................................A-3
Storage Environment....................................................................................................A-3
Appendix B
Rear Signal Connector....................................................................................................B-1
Rear Signal Connector Signal Descriptions.................................................................B-2
Appendix C
SCXIbus Connector .........................................................................................................C-1
SCXIbus Connector Signal Descriptions.....................................................................C-3
Appendix D
SCXI-1100 Front Connector.........................................................................................D-1
Front Connector Signal Descriptions...........................................................................D-2
Appendix E
SCXI-1100 Cabling........................................................................................................... E-1
SCXI-1340 Cable Assembly........................................................................................E-1
SCXI-1340 Installation ....................................................................................E-2
SCXI-1341 Lab-NB, Lab-PC, or Lab-PC+ and SCXI-1344 Lab-LC
Cable Assemblies.........................................................................................................E-3
SCXI-1341 and SCXI-1344 Installation..........................................................E-4
SCXI-1342 PC-LPM-16 Cable Assembly ................................................................... E-5
SCXI-1342 Installation ....................................................................................E-6
AT-MIO-16D and AT-MIO-64F-5 Board Connection................................................E-6
SCXI-1351 and NB5 Cable Installation...........................................................E-6
SCXI-1180 Feedthrough Panel .................................................................................... E-8
SCXI-1180 Installation ....................................................................................E-8
SCXI-1302 50-Pin Terminal Block .............................................................................E-10
SCXI-1302 Wiring Procedure..........................................................................E-10
SCXI-1302 Installation ....................................................................................E-11
SCXI-1351 One-Slot Cable Extender..........................................................................E-12
SCXI-1351 Installation ....................................................................................E-12

Contents
SCXI-1100 User Manual viii © National Instruments Corporation
SCXI-1350 Multichassis Adapter ................................................................................ E-12
SCXI-1350 Installation ....................................................................................E-13
SCXI-1343 Rear Screw Terminal Adapter ..................................................................E-13
SCXI-1343 Installation ....................................................................................E-13
Appendix F
Revision A and B Photo and Parts Locator Diagram...........................................F-1
Appendix G
Customer Communication.............................................................................................G-1
Glossary.....................................................................................................................Glossary-1
Index ................................................................................................................................Index-1

Contents
© National Instruments Corporation ix SCXI-1100 User Manual
Figures
Figure 2-1. SCXI-1100 Parts Locator Diagram..................................................................2-2
Figure 2-2. SCXI-1100 Front Connector Pin Assignment .................................................2-12
Figure 2-3. Ground-Referenced Signal Connection ...........................................................2-14
Figure 2-4. Floating Signal Connection..............................................................................2-14
Figure 2-5. AC-Coupled Signal Connection.......................................................................2-15
Figure 2-6. Assembling and Mounting the Connector-and-Shell Assembly......................2-18
Figure 2-7. SCXI-1300 Parts Locator Diagram..................................................................2-21
Figure 2-8. SCXI-1100 Rear Signal Connector Pin Assignment .......................................2-22
Figure 2-9. SCANCLK Timing Requirements...................................................................2-26
Figure 2-10. Slot-Select Timing Diagram ............................................................................2-27
Figure 2-11. Serial Data Timing Diagram............................................................................2-28
Figure 2-12. Configuration Register Write Timing Diagram...............................................2-29
Figure 2-13. SCXI-1100 Module ID Register Timing Diagram ..........................................2-29
Figure 3-1. SCXI-1100 Block Diagram..............................................................................3-1
Figure 3-2. SCXI-1100 Detailed Block Diagram ...............................................................3-2
Figure 3-3. SCXIbus Connector Pin Assignment...............................................................3-4
Figure 3-4. Digital Interface Circuitry Block Diagram ......................................................3-7
Figure 3-5. SCXI-1100 Digital Control Circuitry ..............................................................3-8
Figure 3-6. Analog Input and Timing Block Diagram .......................................................3-10
Figure 3-7. Pad Locations...................................................................................................3-12
Figure 3-8. Analog Output Circuitry ..................................................................................3-13
Figure 3-9. Single-Module Multiplexed Scanning (Direct)................................................3-15
Figure 3-10. Single-Module Multiplexed Scanning (Indirect) .............................................3-15
Figure 3-11. Multiple-Module Multiplexed Scanning..........................................................3-16
Figure 3-12. Multiple-Chassis Scanning ..............................................................................3-16
Figure B-1. SCXI-1100 Rear Signal Connector Pin Assignment .......................................B-1
Figure C-1. SCXIbus Connector Pin Assignment...............................................................C-2
Figure D-1. SCXI-1100 Front Connector Pin Assignment .................................................D-1
Figure E-1. SCXI-1340 Installation ....................................................................................E-3
Figure E-2. NB5 Cable and SCXI-1351 Installation...........................................................E-7
Figure E-3. SCXI-1180 Rear Connections..........................................................................E-9
Figure E-4. SCXI-1180 Front Panel Installation.................................................................E-10
Figure E-5. Cover Removal ................................................................................................E-11
Figure F-1. Revision A and B SCXI-1100 Signal Conditioning Module...........................F-1
Figure F-2. Revision A and B SCXI-1100 Parts Locator Diagram ....................................F-2

Contents
SCXI-1100 User Manual x © National Instruments Corporation
Tables
Table 2-1. Digital Signal Connections, Jumper Settings...................................................2-5
Table 2-2. Jumper W10 Settings .......................................................................................2-6
Table 2-3. Jumper W1 Settings .........................................................................................2-7
Table 2-4. Jumpers W2, W3, and W4 Settings .................................................................2-8
Table 2-5. Jumpers W7 and W8 Settings..........................................................................2-9
Table 2-6. User-Defined Input Filter Capacitors...............................................................2-9
Table 2-7. User-Defined Current Receiver Resistors........................................................ 2-10
Table 2-8. Jumper Setting on the Terminal Block ............................................................2-20
Table 2-9. SCXIbus to SCXI-1100 Rear Signal Connector to Data Acquisition
Board Pin Equivalences ...................................................................................2-25
Table 3-1. SCXIbus Equivalents for the Rear Signal Connector ......................................3-6
Table 3-2. Multiplexer/Input Channel Correspondence....................................................3-11
Table 5-1. SCXI-1100 Rear Signal Connector Pin Equivalences .....................................5-2
Table E-1. SCXI-1100 and MIO Board Pinout Equivalences ...........................................E-2
Table E-2. SCXI-1341 and SCXI-1344 Pin Translations..................................................E-4
Table E-3. SCXI-1342 Pin Translations............................................................................E-5
Table E-4. SCXI-1343 Pin Connections............................................................................E-14

© National Instruments Corporation xi SCXI-1100 User Manual
About This Manual
This manual describes the electrical and mechanical aspects of the SCXI-1100 module and
contains information concerning its operation and programming. The SCXI-1100 operates as a
32-channel differential input multiplexer with an onboard software-programmable gain
instrumentation amplifier (PGIA). The SCXI-1100 is a member of the National Instruments
Signal Conditioning eXtensions for Instrumentation (SCXI) Series modules for the National
Instruments data acquisition plug-in boards. This module is designed for low-cost signal
conditioning of thermocouples, volt sources, millivolt sources, and 4 to 20 mA sources or 0 to
20 mA process-current sources.
This manual describes the installation, theory of operation, and basic programming
considerations for the SCXI-1100.
Organization of This Manual
The SCXI-1100 User Manual is organized as follows:
• Chapter 1, Introduction, describes the SCXI-1100; lists the contents of your SCXI-1100 kit;
describes the optional software, optional equipment, and custom cables; and explains how to
unpack the SCXI-1100 kit.
• Chapter 2, Configuration and Installation, describes the SCXI-1100 jumper configurations,
installation of the SCXI-1100 into the SCXI chassis, signal connections to the SCXI-1100,
and cable wiring.
• Chapter 3, Theory of Operation, contains a functional overview of the SCXI-1100 module
and explains the operation of each functional unit making up the SCXI-1100.
• Chapter 4, Register Descriptions, describes in detail the SCXI-1100 Module ID Register, the
Configuration Register, the Slot 0 registers, and multiplexer addressing.
• Chapter 5, Programming, contains a functional programming description of the SCXI-1100
and Slot 0.
• Appendix A, Specifications, lists the specifications for the SCXI-1100.
• Appendix B, Rear Signal Connector, describes the pinout and signal names for the
SCXI-1100 50-pin rear signal connector, including a description of each connection.
• Appendix C, SCXIbus Connector, describes the pinout and signal names for the SCXI-1100
96-pin SCXIbus connector, including a description of each connection.
• Appendix D, SCXI-1100 Front Connector, describes the pinout and signal names for the
SCXI-1100 front connector, including a description of each connection.
• Appendix E, SCXI-1100 Cabling, describes how to use and install the hardware accessories
for the SCXI-1100.

About This Manual
SCXI-1100 User Manual xii © National Instruments Corporation
• Appendix F, Revision A and B Photo and Parts Locator Diagram, contains a photograph of
the Revision A and B SCXI-1100 and the parts locator diagram.
• Appendix G, Customer Communication, contains forms you can use to request help from
National Instruments or to comment on our products and manuals.
• The Glossary contains an alphabetical list and description of terms used in this manual,
including abbreviations, acronyms, metric prefixes, mnemonics, and symbols.
• 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-LC, Lab-NB, Lab-PC, and Lab-PC+ boards
unless otherwise noted.
MC MC refers to the Micro Channel series computers.
MIO board MIO board refers to the AT-MIO-16, AT-MIO-16D, AT-MIO-16F-5,
AT-MIO-16X, AT-MIO-64F-5, MC-MIO-16, NB-MIO-16, and
NB-MIO-16X multichannel I/O data acquisition boards unless otherwise
noted.
monospace Lowercase text in this font denotes text or characters that are to be literally
input from the keyboard, sections of code, programming examples, and
syntax examples. This font is also used for the proper names of disk
drives, paths, directories, programs, subprograms, subroutines, device
names, functions, variables, filenames, and extensions, and for statements
and comments taken from program code.
NB NB refers to the NuBus series computers.
PC PC refers to the IBM PC/XT, the IBM PC AT, and compatible computers.
SCXIbus SCXIbus refers to the backplane in the chassis. A signal on the backplane
is referred to as the SCXIbus <signal name> line (or signal). The
SCXIbus descriptor may be omitted when the meaning is clear.
Descriptions of all SCXIbus signals are given in Appendix C, SCXIbus
Connector.
Slot 0 Slot 0 refers to the power supply and control circuitry in the SCXI chassis.
Abbreviations, acronyms, metric prefixes, mnemonics, symbols, and terms are listed in the
Glossary.

About This Manual
© National Instruments Corporation xiii SCXI-1100 User Manual
Related Documentation
The following documents contain information that you may find helpful as you read this manual:
•AT-MIO-16 User Manual (part number 320476-01)
•AT-MIO-16D User Manual (part number 320489-01)
•AT-MIO-16F-5 User Manual (part number 320266-01)
•AT-MIO-16X User Manual (part number 320488-01)
•AT-MIO-64F-5 User Manual (part number 320487-01)
•Lab-LC User Manual (part number 320380-01)
•Lab-NB User Manual (part number 320174-01)
• Lab-PC User Manual (part number 320205-01)
•Lab-PC+ User Manual (part number 320502-01)
•MC-MIO-16 User Manual, Revisions A to C (part number 320130-01)
•MC-MIO-16 User Manual, Revision D (part number 320560-01)
•NB-MIO-16 User Manual (part number 320295-01)
•NB-MIO-16X User Manual (part number 320157-01)
•PC-LPM-16 User Manual (part number 320287-01)
•SCXI-1000/1001 User Manual (part number 320423-01)
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 Appendix G, Customer
Communication, at the end of this manual.

© National Instruments Corporation 1-1 SCXI-1100 User Manual
Chapter 1
Introduction
This chapter describes the SCXI-1100; lists the contents of your SCXI-1100 kit; describes the
optional software, optional equipment, and custom cables; and explains how to unpack the
SCXI-1100 kit.
The SCXI-1100 module operates as a fast 32-channel differential multiplexer with an onboard
programmable gain instrumentation amplifier (PGIA). The SCXI-1100 is a module for signal
conditioning of thermocouples, volt sources, millivolt sources, 4 to 20 mA current sources, and
0 to 20 mA process-current sources. If you provide external excitation, you can also measure
thermistors, strain gauges, and RTDs.
The SCXI-1100 operates with full functionality with the National Instruments MIO boards. You
can use the Lab-LC, Lab-NB, Lab-PC, Lab-PC+, and PC-LPM-16 boards with the SCXI-1100,
but these boards can perform only single-channel reads and cannot scan the module. You can
also use the SCXI-1100 with other systems that comply with the specifications given in
Chapter 2, Configuration and Installation. Each SCXI-1100 module multiplexes its 32 input
channels into a single channel of the data acquisition board. You can multiplex several
SCXI-1100s into a single channel, thus greatly increasing the number of analog input signals that
you can digitize.
An additional shielded terminal block has screw terminals for easy signal attachment to the
SCXI-1100. In addition, a temperature sensor for cold-junction compensation of thermocouples
is included on the terminal block. This cold-junction reference (CJR) is either multiplexed with
the 32 channels or jumper connected to a different channel of the data acquisition board.
With the SCXI-1100 module, the SCXI chassis can serve as a fast-scanning signal conditioner
for laboratory testing, production testing, and industrial-process monitoring.
What Your Kit Should Contain
The contents of the SCXI-1100 kit (part number 776572-00) are listed as follows.
Kit Component Part Number
SCXI-1100 module 181690-01
SCXI-1100 User Manual 320637-01
If your kit is missing any of the components, contact National Instruments.

Introduction Chapter 1
SCXI-1100 User Manual 1-2 © National Instruments Corporation
Optional Software
This manual contains complete instructions for directly programming the SCXI-1100. You can
order separate software packages for controlling the SCXI-1100 from National Instruments.
When you use the SCXI-1100 in combination with the PC, AT, or MC data acquisition boards
with the SCXI-1100, you can use LabVIEW for Windows or LabWindows®for DOS.
LabVIEW and LabWindows are innovative program development software packages for data
acquisition and control applications. LabVIEW uses graphical programming, whereas
LabWindows enhances Microsoft C and QuickBASIC. Both packages include extensive
libraries for data acquisition, instrument control, data analysis, and graphical data presentation.
You can use the SCXI-1100, together with the NB Series data acquisition boards, with
LabVIEW for Macintosh, a software system that features interactive graphics, a state-of-the-art
user interface, and a powerful graphical programming language. The LabVIEW Data
Acquisition Virtual Instrument (VI) Library, a series of VIs for using LabVIEW with National
Instruments boards, is included with LabVIEW. The LabVIEW Data Acquisition VI Library is
functionally equivalent to the NI-DAQ software for Macintosh.
The NI-DAQ driver software is shipped free with National Instruments data acquisition boards.
NI-DAQ has a library of functions that you can call from your application programming
environment. These functions include routines for analog input (A/D conversion), buffered data
acquisition (high-speed A/D conversion), analog output (D/A conversion), waveform generation,
digital I/O, counter/timer, SCXI, Real-Time System Integration (RTSI), and self-calibration.
NI-DAQ maintains a consistent software interface among its different versions so you can switch
between platforms with minimal modifications to your code.
The National Instruments PC, AT, and MC data acquisition boards are packaged with NI-DAQ
software for DOS/Windows/LabWindows. NI-DAQ software for DOS/Windows/LabWindows
comes with language interfaces for Professional BASIC, Turbo Pascal, Turbo C, Turbo C++,
Borland C++, and Microsoft C for DOS; and Visual Basic, Turbo Pascal, Microsoft C with SDK,
and Borland C++ for Windows. NI-DAQ software for DOS/Windows/LabWindows is on high-
density 5.25 in. and 3.5 in. diskettes. You can use your SCXI-1100, together with your PC, AT,
and MC Series data acquisition boards, with NI-DAQ software for DOS/Windows/LabWindows.
The National Instruments NB Series data acquisition boards are packaged with NI-DAQ software
for Macintosh. NI-DAQ software for Macintosh comes with language interfaces for MPW C,
THINK C, Pascal, and Microsoft QuickBASIC. Any language that uses Device Manager
Toolbox calls can access NI-DAQ software for Macintosh. You can use your SCXI-1100,
together with the NB Series data acquisition boards, with NI-DAQ software for Macintosh.

Chapter 1 Introduction
© National Instruments Corporation 1-3 SCXI-1100 User Manual
Optional Equipment
Equipment Part Number
SCXI-1300 front terminal block 776573-00
SCXI-1310 96-pin connector and shell 776573-10
SCXI-1340 cable assembly 776574-40
SCXI-1341 Lab-NB/Lab-PC/Lab-PC+ cable assembly 776574-41
SCXI-1342 PC-LPM-16 cable assembly 776574-42
SCXI-1343 screw terminal adapter 776574-43
SCXI-1344 Lab-LC cable assembly 776574-44
SCXI-1345 shielded cable 1 m
2 m
5 m
10 m
776574-451
776574-452
776574-455
776574-450
SCXI-1346 shielded multichassis cable adapter 776574-46
SCXI-1347 SCXI shielded cable assembly
with 1 m cable
with 2 m cable
with 5 m cable
with 10 m cable
776574-471
776574-472
776574-475
776574-470
SCXI-1349 SCXI shielded cable assembly
with 1 m cable
with 2 m cable
with 5 m cable
with 10 m cable
776574-491
776574-492
776574-495
776574-490
SCXI-1350 multichassis adapter 776575-50
SCXI-1351 one-slot cable extender 776575-51
SCXI process-current resistor kit 776582-01
Standard ribbon cable 0.5 m
1.0 m 180524-05 180524-10
NB5 cable 0.5 m
1.0 m 181304-05 181304-10
NB6 cable
0.5 m
1.0 m 181305-01 181305-10
Refer to the Signal Connections section in Chapter 2, Configuration and Installation, and to
Appendix E, SCXI-1100 Cabling, for additional information on cabling, connectors, and
adapters.

Introduction Chapter 1
SCXI-1100 User Manual 1-4 © National Instruments Corporation
Custom Cables
The SCXI-1100 rear signal connector is a 50-pin male ribbon-cable header. The manufacturer
part number of the header National Instruments uses is as follows:
• AMP Inc. (part number 1-103310-0)
The mating connector for the SCXI-1100 rear signal connector is a 50-position polarized ribbon-
socket connector with strain relief. National Instruments uses a polarized or keyed connector to
prevent inadvertent upside-down connection to the SCXI-1100. Recommended manufacturer
part numbers for this mating connector are as follows:
• Electronic Products Division/3M (part number 3425-7650)
• T&B/Ansley Corporation (part number 609-5041CE)
Part numbers of standard 50-conductor 28 AWG stranded-ribbon cables that you can use with
these connectors are as follows:
• Electronic Products Division/3M (part number 3365/50)
• T&B/Ansley Corporation (part number 171-50)
The SCXI-1100 front connector is a 96-pin DIN C male connector. The manufacturer part
number of this connector National Instruments uses is as follows:
• Harting Electronik Inc. (part number 09-03-396-6921)
The mating connector for the SCXI-1100 front connector is a 96-pin DIN C female connector.
National Instruments uses a polarized connector to prevent inadvertent upside-down connection
to the SCXI-1100. Recommended manufacturer part numbers for this mating connector are as
follows:
• AMP Inc. (part number 535020-1; right-angle pins)
• Panduit Corporation (part number 100-096-434; straight-solder eyelet pins)
Unpacking
Your SCXI-1100 module is shipped in an antistatic package to prevent electrostatic damage to
the module. Several components on the module can be damaged by electrostatic discharge. To
avoid such damage in handling the module, take the following precautions:
• Touch the antistatic package to a metal part of your SCXI chassis before removing the
module from the package.
• Remove the module from the package and inspect the module for loose components or any
other sign of damage. Notify National Instruments if the module appears damaged in any
way. Do not install a damaged module into your SCXI chassis.

© National Instruments Corporation 2-1 SCXI-1100 User Manual
Chapter 2
Configuration and Installation
This chapter describes the SCXI-1100 jumper configurations, installation of the SCXI-1100 into
the SCXI chassis, signal connections to the SCXI-1100, and cable wiring.
Module Configuration
Revision C and later SCXI-1100 modules contain 10 jumpers that are shown in the parts locator
diagram in Figure 2-1. For the Revision A and B parts locator diagram, see Appendix F,
Revision A and B Photo and Parts Locator Diagram.

Chapter 2 Configuration and Installation
© National Instruments Corporation 2-3 SCXI-1100 User Manual
The jumpers are used as follows:
•Fixed jumpers
- Jumper W6 is reserved; do not remove this jumper.
- On Revision A and B modules, jumper W9 is unused; do not connect this jumper.
- On Revision C and later modules, jumper W11 does not exist. On Revision A and B
modules, jumper W11 carries the SLOT0SEL* signal from the rear signal connector,
after buffering, to the SCXIbus INTR* line; leave this jumper in the factory-default
position (position A).
•User-configurable jumpers
- Jumper W5 carries the SCXIbus MISO line, after buffering, to the SERDATOUT signal
on the rear signal connector.
- On Revision C and later modules, jumper W9 connects a pullup resistor to the
SERDATOUT signal on the rear signal connector.
- Jumper W10 configures the guard, the analog output ground, and enables the
Pseudodifferential Output mode.
- Jumpers W7 and W8 connect the module output to the front connector.
- Jumper W1 provides a DC path for the bias current of the PGIA when used with floating
or AC-coupled sources.
- Jumpers W2 through W4 are used to set the lowpass filter (LPF) or full
bandwidth (FBW).
Further configuration of the board is software controlled and is discussed later in this chapter.
Digital Signal Connections
The SCXI-1100 has two jumpers (three jumpers on Revision A and B modules) dedicated for
communication between the data acquisition board and the SCXIbus backplane/Slot 0. These
jumpers are W5 and W9 (and W11 on Revision A and B modules). In most cases, you do not
need to move these jumpers. See Table 2-1 later in this chapter for the description and
configuration of the jumper settings.
Jumper W5
Position 1 connects, after buffering, the SCXIbus MISO line to the SERDATOUT pin of the rear
signal connector. This is the factory-default setting. In this setting, along with the proper setting
of jumper W9, the data acquisition board can read the Module ID Register of the SCXI-1100.
See the Timing Requirements and Communication Protocol section later in this chapter, and
Chapter 4, Register Descriptions, for information on reading the Module ID Register. See
Appendix E, SCXI-1100 Cabling, for the pin equivalences of the SCXI-1100 rear signal
connector and the data acquisition board I/O connector. This position is marked on the module.