National Instruments SCXI-1162HV User manual

© Copyright 1994 National Instruments Corporation.
All Rights Reserved.
SCXI-1162HV
User Manual
32-Channel Isolated AC/DC Digital Input Module
August 1994 Edition
Part Number 320790A-01

National Instruments Corporate Headquarters
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[phone]
Technical support fax: [phone]
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Spain (91) 640 0085, Sweden 08-730 49 70, Switzerland 056/20 51 51, U.K. 0635 523545

Limited Warranty
The SCXI-1162HV 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
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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-1162HV User Manual
Contents
About This Manual............................................................................................................vii
Organization of This Manual........................................................................................vii
Conventions Used in This Manual................................................................................vii
The National Instruments Documentation Set..............................................................ix
Related Documentation.................................................................................................ix
Customer Communication ............................................................................................x
Chapter 1
Introduction.........................................................................................................................1-1
About the SCXI-1162HV..............................................................................................1-1
What You Need to Get Started .....................................................................................1-1
Software Programming Choices ...................................................................................1-1
LabVIEW and LabWindows Application Software .........................................1-2
NI-DAQ Driver Software..................................................................................1-2
Register-Level Programming............................................................................1-4
Optional Equipment......................................................................................................1-4
Custom Cables ..................................................................................................1-5
Unpacking.....................................................................................................................1-6
Chapter 2
Configuration and Installation......................................................................................2-1
Module Configuration...................................................................................................2-1
Configuration Options.......................................................................................2-1
Configuring the Rear Connector for Parallel Mode..............................2-2
Configuring the Rear Connector for Serial Mode.................................2-2
Jumper Use........................................................................................................2-3
Supplementary Jumper W3 Configuration Installation ........................2-6
Hardware Installation....................................................................................................2-6
Software Installation.....................................................................................................2-7
Chapter 3
Signal Connections ............................................................................................................3-1
Front Connector ................................................................................................3-3
Front Connector Signal Descriptions................................................................3-4
Input Channels ......................................................................................3-4
Sensing DC Voltages............................................................................3-4
Sensing AC Voltages............................................................................3-5
Signal Isolation .....................................................................................3-5
Signal Connection Example..................................................................3-5
Terminal Block .................................................................................................3-6
Rear Signal Connector......................................................................................3-6
Rear Signal Connector Signal Descriptions, Serial Configuration...................3-8
Rear Signal Connector Signal Descriptions, Parallel Configuration................3-9

Contents
SCXI-1162HV User Manual vi © National Instruments Corporation
Appendix A
Specifications.......................................................................................................................A-1
Appendix B
Customer Communication..............................................................................................B-1
Glossary........................................................................................................................Glossary-1
Index..................................................................................................................................Index-1
Figures
Figure 1-1. The Relationship between the Programming Environment,
NI-DAQ, and Your Hardware...........................................................................1-3
Figure 2-1. Removing the SCXI Module Cover..................................................................2-3
Figure 2-2. SCXI-1162HV Parts Locator Diagram.............................................................2-4
Figure 3-1. SCXI-1162HV Front Connector Pin Assignment.............................................3-3
Figure 3-2. Signal Connection Example..............................................................................3-6
Figure 3-3. SCXI-1162HV Rear Signal Connector Pin Assignments.................................3-7
Tables
Table 2-1. Digital Signal Connections, Jumper Settings....................................................2-5

© National Instruments Corporation vii SCXI-1162HV User Manual
About This Manual
This manual describes the electrical and mechanical aspects of the SCXI-1162HV and contains
information concerning its operation. The SCXI-1162HV is a member of the National Instruments
Signal Conditioning eXtensions for Instrumentation (SCXI) Series modules for the National
Instruments plug-in DAQ boards. This module switches and controls low-level and power signals.
The SCXI-1162HV operates as 32 digital input channels, arranged as eight banks of four channels.
Each bank is optically isolated.
Organization of This Manual
The SCXI-1162HV User Manual is organized as follows:
• Chapter 1, Introduction, describes the SCXI-1162HV; lists what you need to get started with
your SCXI-1162HV; describes the software programming choices and optional equipment;
and explains how to unpack the SCXI-1162HV kit.
• Chapter 2, Configuration and Installation, describes the SCXI-1162HV jumper
configurations and installation of the SCXI-1162HV into the SCXI chassis.
• Chapter 3, Signal Connections, describes the SCXI-1162HV signal connections via the front
and rear connectors, and has specifications and connection instructions for the SCXI-
1162HV connector signals.
• Appendix A, Specifications, lists the specifications for the SCXI-1162HV.
• Appendix B, Customer Communication, contains forms you can use to request help from
National Instruments or to comment on our products.
• The Glossary contains an alphabetical list and description of terms used in this manual,
including 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:
bold italic Bold italic text denotes a note, caution, or warning.
DIO board DIO board refers to the National Instruments AT-DIO-32F, MC-DIO-24,
MC-DIO-32F, NB-DIO-24, NB-DIO-96, NB-DIO-32F, PC-DIO-24, and
PC-DIO-96 digital I/O DAQ boards unless otherwise noted.

About This Manual
SCXI-1162HV User Manual viii © National Instruments Corporation
DIO-24 board DIO-24 board refers to the National Instruments MC-DIO-24,
NB-DIO-24, and PC-DIO-24 digital I/O DAQ boards.
DIO-type board DIO-type board refers to National Instruments DAQ boards that have only
digital inputs and outputs. These boards include the DIO-24, DIO-32F,
and DIO-96 boards unless otherwise noted.
italic Italic text denotes emphasis, a cross reference, or an introduction to a key
concept.
Lab board Lab board refers to the National Instruments 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 National Instruments 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 DAQ boards unless
otherwise noted.
MIO-type board MIO-type board refers to National Instruments DAQ boards that have at
least analog and digital inputs and outputs. These boards include the MIO
boards, the Lab boards, and the PC-LPM-16 board 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.
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 ix SCXI-1162HV User Manual
The National Instruments Documentation Set
The SCXI-1162HV User Manual is one piece of the documentation set for your DAQ or SCXI
system. You could have any of several types of manuals, depending on the hardware and
software in your system. Use these different types of manuals as follows:
•Getting Started with SCXI–If you are using SCXI, this is the first manual you should read. It
gives an overview of the SCXI system and contains the most commonly needed information
for the modules, chassis, and software.
• Your SCXI hardware user manuals–If you are using SCXI, read these manuals next for
detailed information about signal connections and module configuration. They also explain
in greater detail how the module works and contain application hints.
• Your DAQ hardware user manuals–These manuals have detailed information about the DAQ
hardware that plugs into or is connected to your computer. Use these manuals for hardware
installation and configuration instructions, specification information about your DAQ
hardware, and application hints.
• Software manuals–Examples of software manuals you may have are the LabVIEW and
LabWindows®manual sets and the NI-DAQ manuals. After you have set up your hardware
system, use either the application software (LabVIEW or LabWindows) manuals or the
NI-DAQ manuals to help you write your application. If you have a large and complicated
system, it is worthwhile to look through the software manuals before you configure your
hardware.
• Accessory installation guides or manuals–If you are using accessory products, read the
terminal block and cable assembly installation guides or accessory board user manuals. They
explain how to physically connect the relevant pieces of the system. Consult these guides
when you are making your connections.
• SCXI chassis manuals–If you are using SCXI, read these manuals for maintenance
information on the chassis and installation instructions.
Related Documentation
In addition, the following National Instruments manual contains detailed information for the
register-level programmer.
•SCXI-1162HV Register-Level Programmer Manual
This manual is available from National Instruments by request. If you are using NI-DAQ,
LabVIEW, or LabWindows, you should not need the register-level programmer manual. Using
NI-DAQ, LabVIEW, or LabWindows is quicker and easier than and as flexible as using the low-
level programming described in the register-level programmer manual. Refer to Software
Programming Choices in Chapter 1, Introduction, of this manual to learn about your
programming options.

About This Manual
SCXI-1162HV User Manual x © National Instruments Corporation
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 B, Customer
Communication, at the end of this manual.

© National Instruments Corporation 1-1 SCXI-1162HV User Manual
Chapter 1
Introduction
This chapter describes the SCXI-1162HV; lists what you need to get started with your
SCXI-1162HV; describes the software programming choices and optional equipment; and
explains how to unpack the SCXI-1162HV kit.
About the SCXI-1162HV
The SCXI-1162HV module consists of 32 optically isolated, wide range, AC or DC digital
inputs. The SCXI-1162HV is a module for sensing the presence of AC or DC voltages where
high common-mode voltages may be present.
The SCXI-1162HV works with National Instruments MIO Series boards; the SCXI-1200
module; Lab series boards; and with the DIO-24, DIO-32F, and DIO-96 boards. You can read
24 inputs in parallel mode with a DIO-24 board, or all 32 inputs with a DIO-32F or a DIO-96
board. You can also use the SCXI-1162HV in parallel mode with other digital logic inputs that
comply with the specifications in Chapter 3, Signal Connections. You can control several
SCXI-1162HVs in series mode in a single chassis with one DAQ board.
An additional shielded terminal block, the SCXI-1326, has screw terminals for easy signal
attachment to the SCXI-1162HV.
With the SCXI-1162HV, the SCXI chassis can serve as a digital signal monitor in laboratory
testing, production testing, and industrial process monitoring.
What You Need to Get Started
To set up and use your SCXI-1162HV, you will need the following:
SCXI-1162HV module
SCXI-1162HV User Manual
SCXI chassis
Software Programming Choices
There are four options to choose from when programming your National Instruments DAQ and
SCXI hardware. You can use LabVIEW, LabWindows, NI-DAQ, or register-level programming
software.
The SCXI-1162HV works with LabVIEW for Windows, LabVIEW for Macintosh, LabWindows
for DOS, LabWindows/CVI for Windows, NI-DAQ software for PC compatibles.

Introduction Chapter 1
SCXI-1162HV User Manual 1-2 © National Instruments Corporation
LabVIEW and LabWindows Application Software
LabVIEW and LabWindows are innovative program development software packages for data
acquisition and control applications. LabVIEW uses graphical programming, whereas
LabWindows enhances traditional programming languages. Both packages include extensive
libraries for data acquisition, instrument control, data analysis, and graphical data presentation.
LabVIEW currently runs on three different platforms—AT/MC/EISA computers running
Microsoft Windows, the Macintosh platform, and the Sun SPARCstation platform. LabVIEW
features interactive graphics, a state-of-the-art user interface, and a powerful graphical
programming language. The LabVIEW Data Acquisition VI Library, a series of VIs for using
LabVIEW with National Instruments DAQ hardware, is included with LabVIEW. The
LabVIEW Data Acquisition VI Libraries are functionally equivalent to the NI-DAQ software,
except that the SCXI functions are not included in the LabVIEW software for Sun.
LabWindows has two versions—LabWindows for DOS is for use on PCs running DOS, and
LabWindows/CVI is for use on PCs running Windows and for Sun SPARCstations.
LabWindows/CVI features interactive graphics, a state-of-the-art user interface, and uses the
ANSI standard C programming language. The LabWindows Data Acquisition Library, a series
of functions for using LabWindows with National Instruments DAQ hardware, is included with
the NI-DAQ software kit. The LabWindows Data Acquisition libraries are functionally
equivalent to the NI-DAQ software, except that the SCXI functions are not included in the
LabWindows/CVI software for Sun.
Using LabVIEW or LabWindows software will greatly reduce the development time for your
data acquisition and control application.
NI-DAQ Driver Software
The NI-DAQ driver software is included at no charge with all National Instruments DAQ
hardware. NI-DAQ is not packaged with SCXI or accessory products except for the SCXI-1200.
NI-DAQ has an extensive 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 operations, SCXI, RTSI, self-calibration,
messaging, and acquiring data to extended memory.
NI-DAQ also internally addresses many of the complex issues between the computer and the
DAQ hardware such as programming interrupts and DMA controllers. NI-DAQ maintains a
consistent software interface among its different versions so that you can change platforms with
minimal modifications to your code. Figure 1-1 illustrates the relationship between NI-DAQ and
LabVIEW and LabWindows. You can see that the data acquisition parts of LabVIEW and
LabWindows are functionally equivalent to the NI-DAQ software.

Chapter 1 Introduction
© National Instruments Corporation 1-3 SCXI-1162HV User Manual
LabWindows
(PC or
Sun SPARCstation)
LabVIEW
(PC, Macintosh, or
Sun SPARCstation)
Conventional
Programming
Environment
(PC, Macintosh, or
Sun SPARCstation)
NI-DAQ
Driver Software
DAQ or
SCXI Hardware Personal
Computer
or
Workstation
Figure 1-1. The Relationship between the Programming Environment,
NI-DAQ, and Your Hardware
The National Instruments PC, AT, MC, EISA, DAQCard, and DAQPad Series DAQ hardware
are packaged with NI-DAQ software for PC compatibles. NI-DAQ software for PC compatibles
comes with language interfaces for Professional BASIC, Turbo C++, Borland C++, and
Microsoft C for DOS; and Visual Basic, Turbo Pascal, Microsoft C with SDK, and Borland C++
for Windows. You can use your SCXI-1163R, together with other PC, AT, MC, DAQCard, and
SCXI hardware, with NI-DAQ software for PC compatibles.
The National Instruments NB Series DAQ 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 NB Series DAQ boards
and SCXI hardware with NI-DAQ software for Macintosh.
The National Instruments SB Series DAQ boards are packaged with NI-DAQ software for Sun,
which comes with a language interface for ANSI C.

Introduction Chapter 1
SCXI-1162HV User Manual 1-4 © National Instruments Corporation
Register-Level Programming
The final option for programming any National Instruments DAQ hardware is to write register-
level software. Writing register-level programming software can be very time-consuming and
inefficient, and is not recommended for most users. The only users who should consider writing
register-level software should meet at least one of the following criteria:
• National Instruments does not support your operating system or programming language.
• You are an experienced register-level programmer who is more comfortable writing your
own register-level software.
Even if you are an experienced register-level programmer, always consider using NI-DAQ,
LabVIEW, or LabWindows to program your National Instruments DAQ hardware. Using the
NI-DAQ, LabVIEW, or LabWindows software is easier than, and as flexible as, register-level
programming, and can save you weeks of development time.
The SCXI-1162HV User Manual and your software manuals contain complete instructions for
programming your SCXI-1162HV with NI-DAQ, LabVIEW, or LabWindows. If you are using
NI-DAQ, LabVIEW, or LabWindows to control your board, you should not need the register-
level programmer manual.
The SCXI-1162HV Register-Level Programmer Manual contains low-level programming details,
such as register maps, bit descriptions, and register programming hints, that you will need only
for register-level programming. If you want to obtain the register-level programmer manual,
please fill out the Register-Level Programmer Manual Request Form in Appendix B, Customer
Communication, at the end of this manual and send it to National Instruments.
Optional Equipment
Contact National Instruments to order any of the following optional equipment:
SCXI-1326 front terminal block
SCXI-1340 cable assembly
SCXI-1341 Lab-NB/Lab-PC/Lab-PC+ cable assembly
SCXI-1342 PC-LPM-16 cable assembly
SCXI-1343 rear screw terminal adapter
SCXI-1344 Lab-LC cable assembly
SCXI-1350 multichassis adapter
SCXI-1351 one slot extender cable

Chapter 1 Introduction
© National Instruments Corporation 1-5 SCXI-1162HV User Manual
SCXI-1348 DIO-32F cable assembly
Standard ribbon cable in lengths of 0.5 or 1.0 m
NB5 cable in lengths of 0.5 or 1.0 m
Refer to Chapter 3, Signal Connections, and to your cable or accessory installation guide for
additional information on cabling, connectors, and adapters.
Custom Cables
The SCXI-1162HV rear signal connector is a 50-pin male ribbon-cable header. The
manufacturer part number for the header National Instruments uses is as follows:
• AMP Inc. (part number 1-103310-0)
The mating connector for the SCXI-1162HV 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-1162HV. 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)
Standard 50-conductor 28 AWG stranded ribbon cables that work with these connectors are as
follows:
• Electronic Products Division/3M (part number 3365/50)
• T&B/Ansley Corporation (part number 171-50)
The SCXI-1162HV front connector is a special 48-pin DIN C male connector. The manufacturer
part number of the connector National Instruments uses is as follows:
• ERNI Components, Inc. (part number 033-273)
The mating connector for the SCXI-1162HV front connector is a special 48-pin reversed DIN C
female connector. National Instruments uses a polarized and keyed connector to prevent
inadvertent upside-down connection to the SCXI-1162HV. The manufacturer part number of the
mating connector National Instruments uses is as follows:
• ERNI Components, Inc. (part number 913-271)
These connectors were selected to meet UL 1244 for 450 Vrms working isolation.

Introduction Chapter 1
SCXI-1162HV User Manual 1-6 © National Instruments Corporation
Unpacking
Your SCXI-1162HV module is shipped in an antistatic package to prevent electrostatic damage
to the module. Electrostatic discharge can damage several components on the module. To avoid
such damage in handling the module, take the following precautions:
• Ground yourself via a grounding strap or by holding a grounded chassis such as an
SCXI chassis.
• 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.
•Never touch the exposed pins of connectors.

© National Instruments Corporation 2-1 SCXI-1162HV User Manual
Chapter 2
Configuration and Installation
This chapter describes the SCXI-1162HV jumper configurations and installation of the
SCXI-1162HV into the SCXI chassis.
Module Configuration
The SCXI-1162HV has six user-configurable jumpers and one reserved jumper that are shown in
the parts locator diagram in Figure 2-1. You use these jumpers to configure the SCXI-1162HV
rear connector.
Notes: When you are controlling the SCXI-1162HV through the SCXIbus and are not using
the rear connector (not cabled directly to a plug-in DAQ board), the positions of the
configuration jumpers are irrelevant.
If you want to use a single DAQ board to control a chassis which contains analog
modules in addition to your SCXI-1162HV, then you must cable your DAQ board to
one of the analog modules rather than to the SCXI-1162HV.
You can configure the SCXI-1162HV rear connector to send data directly from the inputs in
parallel, or to form a serial communication link with the SCXIbus. In the latter case, you can
also configure the rear connector to connect to a DIO-type or an MIO-type DAQ board.
You must configure the module in the chassis that is cabled to the DAQ board to allow reads
from module registers. (Specifically, the module must be configured to send data from the
SCXIbus MISO line to the SERDATOUT pin of the module rear connector. Refer to the user
manual for the SCXI module you are cabling to a DAQ board for information on how to
accomplish this.)
Configuration Options
The SCXI-1162HV is shipped configured for serial communication through a DIO-type board or
the SCXI chassis. Change the jumper configuration from the factory default settings only if you
plan to cable the SCXI-1162HV rear connector to an MIO-type board, or to use the
SCXI-1162HV in parallel mode, or if the SCXI-1162HV is a controller module for a
multichassis system.

Configuration and Installation Chapter 2
SCXI-1162HV User Manual 2-2 © National Instruments Corporation
Configuring the Rear Connector for Parallel Mode
When the rear connector is configured for parallel mode, the data from each input is sent directly
to a rear connector pin. You do not need serial communication with the SCXI chassis or
modules to read the data when the module is in parallel mode. This mode may be useful when
you want to send data from the SCXI-1162HV directly to equipment other than a DAQ board.
When the SCXI-1162HV is configured for parallel mode, a DAQ board cabled to the module can
only read from that module; communication with the SCXI chassis or other modules in that
chassis must be through another DAQ board. Only DIO DAQ boards can read the data from the
SCXI-1162HV in parallel mode; MIO boards can only read from the SCXI-1162HV in serial
mode.
When you configure the SCXI-1162HV for parallel mode, the module can drive either all
32 digital lines of the rear connector or only the first 24 lines. When you cable a DIO-24 or the
DIO portion of an AT-MIO-16D to an SCXI-1162HV in parallel mode, the SCXI-1162HV must
be configured to drive only 24 of the rear connector lines, because the DIO-24 and the
AT-MIO-16D only have 24 digital inputs. Do not attempt to connect the SCXI-1162HV to a
DIO-24 or an AT-MIO-16D with the module configured to drive all 32 lines in parallel, as this
may cause driver contention.
Note: When the rear connector is configured for parallel mode, the data can still be read in
serial mode through the SCXIbus connector. The jumper set configuration only
affects the rear signal connector; no other module functionality is affected by the
jumper positions.
Configuring the Rear Connector for Serial Mode
When the rear connector is configured for serial mode, there is a serial data link between the rear
connector and the SCXIbus. This lets a DAQ board cabled to the rear connector communicate
with the SCXI-1162HV and with all other modules in the chassis. This is the recommended
mode of operation because you only need one DAQ board for an entire SCXI system.
When the SCXI-1162HV is configured for serial mode, only digital data is transferred between
the SCXIbus and the rear signal connector. Thus, in a mixed system of analog modules and
digital modules, the DAQ board must be cabled to an analog module. If the DAQ board were
cabled to a digital module such as the SCXI-1162HV, the analog signals from analog modules
could not reach the DAQ board.

Chapter 2 Configuration and Installation
© National Instruments Corporation 2-3 SCXI-1162HV User Manual
Jumper Use
To configure the SCXI-1162HV module, use the six user-configurable jumpers (W2–W7) shown
in the parts locator diagram, Figure 2-2. (Jumper W1 is a reserved jumper and should remain
unconnected.) If you are controlling the SCXI-1162HV via the SCXIbus and are not using the
rear connector, then the positions of these jumpers are irrelevant. Tables 2-1 and 2-2 list the
description and configuration of the user-configurable jumpers. To change the configuration of
the module, refer to Figures 2-1 and 2-2 as you perform the following steps:
1. Remove the grounding screw of the top cover.
2. Snap out the top cover of the shield by placing a screwdriver in the groove at the bottom of
the module.
3. Remove the jumpers to be changed and replace them on the appropriate pins.
4. Record the new jumper settings on the SCXI-1162HV Hardware Configuration Form in
Appendix B, Customer Communication.
5. Snap the top cover back in place.
6. Replace the grounding screw to ensure proper shielding.
450 V MAX BANK-TO-BANK
450 V MAX BANK-TO-EARTH
SCXI
1162HV
Removable Cover
Front Connector
Top of Module
32-CHANNEL
HIGH VOLTAGE
DIGITAL INPUT
Grounding screw
(on rear panel)
Figure 2-1. Removing the SCXI Module Cover