KUSB-3102 and KUSB-3108
Getting Started Manual
KUSB3102/8-903-01 Rev. A / January 2005
www.keithley.com
A GR
EATER MEASURE OF CONFIDENCE
WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 3 years from
date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable batteries,
diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio.
You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service facility. Repairs will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or misuse
of any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED HEREIN
ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE
POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO:
COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON,
OR DAMAGE TO PROPERTY.
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Keithley Instruments, Inc.
Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139
440-248-0400 • Fax: 440-248-6168 • 1-888-KEITHLEY (534-8453) • www.keithley.com
12/04
KUSB-3102 and KUSB-3108
Getting Started Manual
©2005, Keithley Instruments, Inc.
All rights reserved.
First Printing, January 2005
Cleveland, Ohio, U.S.A.
Document Number: KUSB3102/8-903-01A
Rev. A
Manual Print History
The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released
between Revisions, contain important change information that the user should incorporate immediately into the manual.
Addenda are numbered sequentially. When a new Revision is created, all Addenda associated with the previous Revision
of the manual are incorporated into the new Revision of the manual. Each new Revision includes a revised copy of this
print history page.
Revision A (Document Number KUSB3102/8-903-01A)................................................................... January 2005
All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered trademarks of their respective holders.
Safety Precautions
The following safety precautions should be observed before using
this product and any associated instrumentation. Although some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions
may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation,
operation, and maintenance information carefully before using the
product. Refer to the manual for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use
and maintenance of equipment, for ensuring that the equipment is
operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be
trained in electrical safety procedures and proper use of the instrument. They must be protected from electric shock and contact with
hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures
are described in the manual. The procedures explicitly state if the
operator may perform them. Otherwise, they should be performed
only by service personnel.
Service personnel are trained to work on live circuits, and perform
safe installations and repairs of products. Only properly trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that
are rated Measurement Category I and Measurement Category II, as
described in the International Electrotechnical Commission (IEC)
Standard IEC 60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages. Measurement Category II connections require protection
for high transient over-voltages often associated with local AC
mains connections. Assume all measurement, control, and data I/O
connections are for connection to Category I sources unless otherwise marked or described in the Manual.
Exercise extreme caution when a shock hazard is present. Lethal
voltage may be present on cable connector jacks or test fixtures.
The American National Standards Institute (ANSI) states that a
shock hazard exists when voltage levels greater than 30V RMS,
42.4V peak, or 60VDC are present. A good safety practice is to ex-
pect that hazardous voltage is present in any unknown circuit
before measuring.
Operators of this product must be protected from electric shock at
all times. The responsible body must ensure that operators are prevented access and/or insulated from every connection point. In
some cases, connections must be exposed to potential human contact. Product operators in these circumstances must be trained to
protect themselves from the risk of electric shock. If the circuit is
capable of operating at or above 1000 volts, no conductive part of
the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits.
They are intended to be used with impedance limited sources.
NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit
fault current and voltage to the card.
Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible wear, cracks, or breaks
before each use.
When installing equipment where access to the main power cord is
restricted, such as rack mounting, a separate main input power disconnect device must be provided, in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any
other instruments while power is applied to the circuit under test.
ALWAYS remove power from the entire test system and discharge
any capacitors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal
changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the
common side of the circuit under test or power line (earth) ground.
Always make measurements with dry hands while standing on a
dry, insulated surface capable of withstanding the voltage being
measured.
The instrument and accessories must be used in accordance with its
specifications and operating instructions or the safety of the equipment may be impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or
switching card.
When fuses are used in a product, replace with same type and rating
for continued protection against fire hazard.
5/03
Chassis connections must only be used as shield connections for
measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a
lid interlock.
If a screw is present, connect it to safety earth ground using the
wire recommended in the user documentation.
!
The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.
The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined effect of normal
and common mode voltages. Use standard safety precautions to
avoid personal contact with these voltages.
The symbol indicates a connection terminal to the equipment
frame.
The WARNING heading in a manual explains dangers that might
result in personal injury or death. Always read the associated information very carefully before performing the indicated procedure.
The CAUTION heading in a manual explains hazards that could
damage the instrument. Such damage may invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and
all test cables.
To maintain protection from electric shock and fire, replacement
components in mains circuits, including the power transformer, test
leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety approvals,
may be used if the rating and type are the same. Other components
that are not safety related may be purchased from other suppliers as
long as they are equivalent to the original component. (Note that selected parts should be purchased only through Keithley Instruments
to maintain accuracy and functionality of the product.) If you are
unsure about the applicability of a replacement component, call a
Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water based
cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on
the instrument. Products that consist of a circuit board with no case
or chassis (e.g., data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected,
the board should be returned to the factory for proper cleaning/servicing.
Table of Contents
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
How this Manual is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . x
Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Where To Get Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Chapter 1: Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Key Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Getting Started Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2: Preparing to Use a Module. . . . . . . . . . . . . . . . . . 5
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Checking the System Requirements . . . . . . . . . . . . . . . . . . . . . . . . 8
Installing the Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 3: Installing a Module and Configuring the
Device Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting Directly to the Host Computer . . . . . . . . . . . . . . . . . 14
Connecting to a Self-Powered USB Hub. . . . . . . . . . . . . . . . . . . . 16
Configuring the Device Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 4: Wiring Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wiring Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting Analog Input Signals . . . . . . . . . . . . . . . . . . . . . . . . . 26
Connecting Single-Ended Voltage Inputs . . . . . . . . . . . . . . . 27
Connecting Pseudo-Differential Voltage Inputs . . . . . . . . . . 28
vii
Contents
Connecting Differential Voltage Inputs . . . . . . . . . . . . . . . . . 29
Connecting Current Loop Inputs . . . . . . . . . . . . . . . . . . . . . . 32
Connecting Thermocouple Inputs . . . . . . . . . . . . . . . . . . . . . 33
Connecting Analog Output Signals. . . . . . . . . . . . . . . . . . . . . . . . 35
Connecting Digital I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Connecting Counter/Timer Signals . . . . . . . . . . . . . . . . . . . . . . . 38
Connecting Event Counting Signals. . . . . . . . . . . . . . . . . . . . 38
Connecting Frequency Measurement Signals. . . . . . . . . . . . 40
Connecting Pulse Output Signals. . . . . . . . . . . . . . . . . . . . . . 42
Chapter 5: Verifying the Operation of a Module . . . . . . . . . 45
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Running the Quick Data Acq Application . . . . . . . . . . . . . . . . . . 48
Performing a Single-Value Analog Input Operation . . . . . . 49
Performing a Single-Value Analog Output Operation . . . . 50
Performing a Continuous Analog Input Operation. . . . . . . 51
Performing a Single-Value Digital Input Operation . . . . . . 53
Performing a Single-Value Digital Output Operation. . . . . 54
Performing a Frequency Measurement Operation. . . . . . . . 55
Performing a Pulse Output Operation. . . . . . . . . . . . . . . . . . 56
viii
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
About this Manual
This manual describes how to install and set up your KUSB-3102 or
KUSB-3108 module and device driver, and verify that your module is
working properly.
Intended Audience
This document is intended for engineers, scientists, technicians, or
others responsible for installing and setting up a KUSB-3102 or
KUSB-3108 module to perform data acquisition operations. It is
assumed that you are familiar with the requirements of your
application. It is also assumed that you are familiar with the
Microsoft
How this Manual is Organized
This manual is organized as follows:
• Chapter 1, “Overview,” describes the key features of the
®
Windows® 2000 or Windows XP.
KUSB-3102 and KUSB-3108 hardware and software, and
provides an overview of the getting started procedure.
• Chapter 2, “Preparing to Use a Module,” describes how to
unpack the module, check the system requirements, and install
the software using Windows 2000 or Windows XP.
• Chapter 3, “Installing a Module and Configuring the Device
Driver,” describes how to install the KUSB-3102 or KUSB-3108
module and configure the device driver.
• Chapter 4, “Wiring Signals,” describes how to wire signals to the
module.
• Chapter 5, “Verifying the Operation of a Module,” describes how
to verify the operation of the module with the Quick Data Acq
application.
vii
About this Manual
Conventions Used in this Manual
Related Information
An index completes this manual.
The following conventions are used in this manual:
• Notes provide useful information that requires special emphasis,
cautions provide information to help you avoid losing data or
damaging your equipment, and warnings provide information to
help you avoid catastrophic damage to yourself or your
equipment.
• Items that you select or type are shown in bold.
• Courier font is used to represent source code.
Refer to the following documents for more information on using the
KUSB-3102 or KUSB-3108 module:
viii
• KUSB-3102 and KUSB-3108 User’s Manual provided with the
module. This manual describes the features of the KUSB-3102
and KUSB-3108 modules and device driver.
• DataAcq SDK User’s Manual. For programmers who are
developing their own application programs using the Microsoft
C compiler, this manual describes how to use the DT-Open
TM
Layers
DataAcq SDKTM in Windows 2000 or Windows XP to
access the capabilities of your module.
• DTx-EZ Getting Started Manual. This manual describes how to use
the ActiveX controls provided in DTx-EZ
TM
to access the
capabilities of your module in Microsoft Visual Basic® or Visual
C++®.
• DT-LV Link Getting Started Manual. This manual describes how to
use DT-LV Link
TM
with the LabVIEW® graphical programming
language to access the capabilities of your module.
• Microsoft Windows 2000 or Windows XP documentation.
• USB web site (http://www.usb.org).
Where To Get Help
Should you run into problems installing or using your KUSB-3102 or
KUSB-3108 module, please call the Keithley Technical Support
Department.
About this Manual
ix
About this Manual
x
1
Overview
Key Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Getting Started Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1
Chapter 1
Key Hardware Features
Table 1 lists the key features of the KUSB-3102 and KUSB-3108
modules.
Table 1: Key Features
Module
# of
Analog Inputs
Sample
Rate
# of Analog
Outputs
# of DIO
Lines
# of
Counter/
Timers
KUSB3102
KUSB3108
16 single-ended/ or
8 differential
16 single-ended/
8 differential/ or
7 thermocouples
and 1 CJC
100 kS/s 2 8 in,
8 out
50 kS/s 2 8 in,
8 out
2
2
2
Software
The software for the KUSB-3102 and KUSB-3108 modules, which is
shipped on the Keithley CD that is provided with the modules,
includes the following software components:
Overview
1
• Device Driver − This software must be installed and loaded
before you can use a KUSB-3102 and KUSB-3108 module with
any of the supported software packages or utilities.
• The Quick Data Acq application − This application provides a
quick way to get your module up and running. Using the Quick
Data Acq application, you can verify the features of the module,
display data on the screen, and save data to disk.
• Calibration Utility − This software allows you to calibrate the
analog I/O circuitry of the module. Refer to the KUSB-3102 and
KUSB-3108 User’s Manual for information on using this utility.
• DataAcq SDK − This DT-Open Layers Software Develop Kit
(SDK) allows programmers to develop application programs for
the KUSB-3102 and KUSB-3108 using the Microsoft C compiler in
Windows 2000 or Windows XP.
• DTx-EZ − This software package contains ActiveX controls that
allow Microsoft Visual Basic® or Visual C++® programmers to
access the capabilities of the KUSB-3102 and KUSB-3108
modules.
• DT-LV Link − This software package allows LabVIEW®
programmers to access the capabilities of the KUSB-3102 and
KUSB-3108 modules.
1
1
1
1
1
1
1
1
3
Chapter 1
Getting Started Procedure
The flow diagram shown in Figure 1 illustrates the steps needed to
get started using the KUSB-3102 or KUSB-3108 module. This diagram
is repeated in each chapter; the shaded area in the diagram shows
you where you are in the getting started procedure.
Preparing to Use a Module
(see Chapter 2 starting on page 5)
Install the Module and Configure the
(see Chapter 3 starting on page 11)
(see Chapter 4 starting on page 21)
Verify the Operation of the Module
(see Chapter 5 starting on page 45)
Device Driver
Wire Signals
Figure 1: Getting Started Flow Diagram
4
2
Preparing to Use a
Module
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Checking the System Requirements . . . . . . . . . . . . . . . . . . . . . . . . 8
Installing the Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Chapter 2
Prepare to Use a Module
(this chapter)
Install the Module and Configure
the Device Driver
(see Chapter 3 starting on page 11)
Wire Signals
(see Chapter 4 starting on page 21)
Verify the Operation of the Module
(see Chapter 5 starting on page 45)
6
Unpacking
Open the shipping box and verify that the following items are
present:
• KUSB-3102 or KUSB-3108 module,
•USB cable, and
• Keithley CD.
Preparing to Use a Module
2
2
If an item is missing or damaged, contact Keithley Technical Support.
Once you have unpacked your module, check the system
requirements, as described in the next section.
2
2
2
2
2
2
2
7
Chapter 2
Checking the System Requirements
For reliable operation, your KUSB-3102 or KUSB-3108 module
requires the items listed in Tab le 2.
Table 2: Minimum System Requirements
Feature Minimum Requirements
Operating
System
Processor 80486, Pentium, or compatible
USB Ports One or more
RAM 16 MB or more
CD-ROM Drives One or more
Monitor VGA, or compatible, display (640 x 480 or
Windows 2000 or Windows XP
higher, 256 colors recommended)
Once you have verified that your system meets the system
requirements, install the software as described in the next section.
8
Installing the Software
To install the driver software, Data Acq SDK, DTx-EZ, and the Quick
Data Acq software, perform the following steps:
Preparing to Use a Module
2
1. Insert the Keithley CD into your CD-ROM drive.
2. Click Start from the Task Bar, then click Run.
The Run dialog box appears.
3. In the Command Line edit box, enter D:\Setup.Exe.
If your CD-ROM is not in drive D:, enter the letter of the drive where
your CD-ROM is located. The welcome screen appears.
4. Click Install Drivers and SDK.
5. Click Install now!
The installation wizard appears.
6. Click Next.
You are prompted for the destination location.
7. Either change the directory path and/or name using Browse or
accept the default directory, then click Next.
8. Click Next to copy the files.
9. Click Finish.
10. Click Quit Installer.
2
2
2
2
2
2
2
2
9
Chapter 2
10
3
Installing a Module and
Configuring the Device Driver
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connecting Directly to the Host Computer . . . . . . . . . . . . . . . . . 14
Connecting to a Self-Powered USB Hub. . . . . . . . . . . . . . . . . . . . 16
Configuring the Device Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
11
Chapter 3
Prepare to Use a Module
(see Chapter 2 starting on page 5)
Install the Module and
Configure the Device Driver
(this chapter)
Wire Signals to the Module
(see Chapter 4 starting on page 21)
Verify the Operation of the Module
(see Chapter 5 starting on page 45)
Note: The KUSB-3102 and KUSB-3108 modules are
factory-calibrated and require no further adjustment prior to
installation. If you decide later to recalibrate them, refer to the
KUSB-3102 and KUSB-3108 User’s Manual for instructions.
12
Overview
You can attach a KUSB-3102 and KUSB-3108 module to the host
computer in one of two ways:
• Connect directly to a USB port of the host computer, described on
• Connect to one or more self-powered USB hubs, described on
Installing a Module and Configuring the Device Driver
page 13. Use this method if one or two modules are sufficient for
your application.
page 16. Use this method if your application requires more than
two modules connected to the host computer.
3
3
3
Note: KUSB-3102 and KUSB-3108 modules are low-power devices
(using less than 500 mA); therefore, they do not require external
power supplies.
3
3
3
3
3
3
13
Chapter 3
Connecting Directly to the Host Computer
Generally, host computers have two USB ports. These ports are
completely independent. To connect a KUSB-3102 or KUSB-3108
module directly to a USB port of the computer, perform the following
steps:
1. Attach one end of the USB cable, which is shipped with the
module, to the USB port on the module.
2. Attach the other end of the cable to one of the USB ports on the
host computer, as shown in Figure 2.
The operating system automatically detects the USB device.
USB Ports
KUSB-3102 or
KUSB-3108
Host Computer
USB Cables
module
14
Figure 2: Attaching a KUSB-3102 or KUSB-3108 Module
Directly to the Host Computer
3. If you previously installed the device driver, ignore the
remaining steps, and repeat steps 1 and 2 to attach another
module to the host computer, if desired.
If you have not yet installed the device driver, the New
Hardware Found wizard appears. Click Next to have the wizard
search for the device driver, then proceed to step 4.
4. Click the option to search for the driver, then click Next.
5. Click the option to specify the location, browse to the location on
the CD that contains the driver files, then click Next.
6. Click Next.
Installing a Module and Configuring the Device Driver
7. Click Finish.
A New Hardware Found dialog box appears indicating that Windows is
installing the driver for the USB device.
8. Repeat the steps 1 and 2 to attach another KUSB-3102 or
KUSB-3108 module to the host computer, if desired.
Note: You can unplug a module, then plug it in again, if you wish,
without causing damage. This process is called hot-swapping.
Your application may take a few seconds to recognize a module once
it is plugged back in.
3
3
3
3
3
3
3
3
3
15
Chapter 3
Connecting to a Self-Powered USB Hub
Self-powered USB hubs are USB hubs that are powered by their own
external power supply. Theoretically, you can connect up to five
self-powered USB hubs to a USB port on the host computer.
However, the practical number of KUSB-3102 and KUSB-3108
modules that you can connect to a single USB port depends on the
throughput you want to achieve. Each of the hubs supports up to
four KUSB-3102 and KUSB-3108 modules.
Note: The bandwidth of the USB 1.1 bus is 12 Mbits/second. Each
KUSB-3102 or KUSB-3108 module running at full speed (100 kHz)
requires 200 kB of this bandwidth. Therefore, if you want to achieve
full throughput on each module, you should connect no more than
four KUSB-3102 or KUSB-3108 modules to a single USB port.
To connect a KUSB-3102 or KUSB-3108 module to a self-powered
USB hub, perform the following steps:
16
1. Attach one end of the USB cable to the KUSB-3102 or KUSB-3108
module and the other end of the USB cable to a self-powered USB
hub.
2. Connect the power supply for the self-powered USB hub to an
external power supply.
3. Connect the hub to the USB port on the host computer using
another USB cable.
The operating system automatically detects the USB device.
4. If you previously installed the device driver, ignore the
remaining steps, and repeat steps 1 to 3 until you have attached
the number of hubs (up to five) and modules (up to four per hub)
that you desire.
Installing a Module and Configuring the Device Driver
If you have not installed the device driver, the New Hardware
Found wizard appears. Click Next to have the wizard search for
the device driver. Proceed to step 5.
5. Click the option to search for the driver, then click Next.
3
6. Click the option to specify the location, browse to the location on
the CD that contains the driver files, then click Next.
7. Click Next.
8. Click Finish.
A New Hardware Found dialog box appears indicating that Windows is
installing the driver for the USB device.
9. Repeat steps 1 to 3 until you have attached the number of hubs
(up to five) and modules (up to four per hub) that you desire.
Refer to Figure 3.
The operating system automatically detects the USB devices as they are
installed.
3
3
3
3
3
3
3
3
17
Chapter 3
Host Computer
KUSB-3102 or
KUSB-3108
module
USB Cable
USB Cables
KUSB-3102 or
KUSB-3108
module
USB Cable
Power Supply
for Hub
KUSB-3102 or
KUSB-3108
module
USB Cables
Self-Powered
USB Hubs
KUSB-3102 or
KUSB-3108
module
Figure 3: Attaching a KUSB-3102 or KUSB-3108 Module to the
Host Computer Using Self-Powered USB Hubs
Note: You can unplug a module, then plug it in again, if you wish,
without causing damage. This process is called hot-swapping.
Your application may take a few seconds to recognize a module once
it is plugged back in.
You are now ready to wire signal to your module, as described in
Chapter 4 starting on page 21.
18
Installing a Module and Configuring the Device Driver
Configuring the Device Driver
To configure the device driver for the KUSB-3102 and KUSB-3108
modules, perform the following steps:
1. If you have not already done so, power up the host computer and
all peripherals.
2. From the Control Panel, double-click the Open Layers Data
Acquisition Control Panel icon.
The Open Layers dialog box appears.
3. Click the module that you want to configure, then click
Advanced.
The Configuration dialog box appears.
4. If you are using differential analog input channels, it is
recommended that you select the 10k Ohm Resistor
Terminations checkbox for each analog input channel on the
module. This ensures that 10 kΩ of bias return termination
resistance is used for the analog input channels. (This is the
default configuration.) Bias return termination resistance is
particularly useful when your differential source is floating.
3
3
3
3
3
If you are using single-ended analog input channels, clear the
checkbox for each analog input channel so that bias return
resistance is not used.
5. To continuously power the analog and/or digital outputs, select
the Power Always On checkbox. When this setting is checked,
the module will remain on even when you exit from the
applications that use the module.
If you want to shut down power to the module, you must
uncheck this checkbox and close the control panel. Once all
applications that use this module are exited, the module will
power down. The module will remain off until you either run an
application that uses the module or click the Advanced button
from the Open Layers Data Acquisition Control Panel.
3
3
3
3
19
Chapter 3
6. Click OK.
7. If you want to rename the module, click Edit Name; otherwise,
go to step 9.
8. Enter a new name for the module, then click OK.
Note: This name is used to identify the module in all subsequent
applications.
9. When you are finished configuring the module, click Close.
10. Repeat steps 3 to 9 for the other modules that you want to
configure.
11. Close the Control Panel.
20
4
Wiring Signals
Wiring Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting Analog Input Signals . . . . . . . . . . . . . . . . . . . . . . . . . 26
Connecting Analog Output Signals. . . . . . . . . . . . . . . . . . . . . . . . 35
Connecting Digital I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Connecting Counter/Timer Signals . . . . . . . . . . . . . . . . . . . . . . . 38
21
Chapter 4
Prepare to Use a Module
(see Chapter 2 starting on page 5)
Install the Module and Configure
the Device Driver
(see Chapter 3 starting on page 11)
Wire Signals
(this chapter)
Verify the Operation of the Module
(see Chapter 5 starting on page 45)
22
Wiring Overview
Before wiring signals to a KUSB-3102 or KUSB-3108 module, peel off
the color labels provided in the shipping box and attach one to the
outside of each screw terminal block. Ensure that you match the color
of the peel-off label to the color on the label on top of the unit. This
way, if you later remove the screw terminal blocks, you will know
where to reattach them.
Wiring Signals
4
4
CAUTION:
To avoid electrostatic sensitivity, it is recommended that you unplug
your module from the computer before wiring signals.
In addition, to ensure that your module performs as expected, insert
each screw terminal block into the location on the module with the
matching color.
Keep the following recommendations in mind when wiring signals to
the KUSB-3102 or KUSB-3108 module:
• Use individually shielded twisted-pair wire (size 14 to 26 AWG)
when using the modules in highly noisy electrical environments.
• Separate power and signal lines by using physically different
wiring paths or conduits.
• To avoid noise, do not locate the modules and cabling next to
sources that produce high electromagnetic fields, such as large
electric motors, power lines, solenoids, and electric arcs, unless
the signals are enclosed in a mumetal shield.
• Prevent electrostatic discharge to the I/O while the modules are
operational.
4
4
4
4
4
4
• Connect all unused analog input channels to analog ground.
4
23
Chapter 4
• When first installing the module, try wiring the signals as
follows:
− Wire a function generator or a known voltage source to
analog input channel 0 using the differential configuration.
− Wire an oscilloscope or voltage meter to analog output
channel 0.
− Wire a digital input to digital input line 0 of port A.
− Wire a digital output to digital output line 0 of port B.
− Wire an external clock or scope to counter/timer channel 0.
− Then, run the Quick Data Acq application (described in
Chapter 5 starting on page 45) to verify that the module is
operating properly.
Once you have determined that the module is operating
properly, wire the signals according to your application’s
requirements.
Figure 4 shows the assignments of the screw terminals on the
KUSB-3102 and KUSB-3108 modules. The screw terminal blocks are
removable for your convenience.
24
t
t
t
t
User Clk Input 0
User Cntr Out 0
External Gate 0
Isolated Dig Gnd
User Clk Input 1
User Cntr Out 1
External Gate 1
Isolated Dig Gnd
Dynamic Dig Out
Digital Output 0
Digital Output 1
Digital Output 2
Digital Output 3
Digital Output 4
Digital Output 5
Digital Output 6
Digital Output 7
Isolated Dig Gnd
45
44
43
42
41
40
39
38
37
54
53
52
51
50
49
48
47
46
36
Isolated Dig Gnd
KUSB-3102 and KUSB-3108 Modules
27
29
30
31
32
33
34
35
Digital Input 7
Digital Input 6
Digital Input 5
Digital Input 4
Digital Input 3
Digital Input 2
Digital Input 1
28
Digital Input 0
Isolated +5 V Out
Isolated Dig Gnd
26
24
25
Ext A/D Sample Clk
Ext A/D Trigger
23
Isolated Dig Gnd
22
Analog Out 1 Ret
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
20
21
Analog Out 1+
Analog Out 0 Ret
Wiring Signals
Channel 00
Channel 08/00 Ret
Channel 01
Channel 09/01 Ret
Channel 02
Channel 10/02 Ret
Channel 03
Channel 11/03 Ret
Channel 04
Channel 12/04 Re
Channel 05
Channel 13/05 Re
Channel 06
Channel 14/06 Re
Channel 07
Channel 15/07 Re
Isolated An Gnd
Amp Low
19
Analog Out 0+
4
4
4
4
4
Figure 4: Screw Terminal Assignments
4
4
4
4
25
Chapter 4
Connecting Analog Input Signals
The KUSB-3102 and KUSB-3108 modules support both voltage and
current loop inputs.
You can connect analog input signals to the module in the following
configurations:
• Single-ended − Choose this configuration when you want to
measure high-level signals, noise is not significant, the source of
the input is close to the module, and all the input signals are
referred to the same common ground. When you choose the
single-ended configuration, all 16 analog input channels are
available.
• Pseudo-Differential − Choose this configuration when noise or
common-mode voltage (the difference between the ground
potentials of the signal source and the ground of the module or
between the grounds of other signals) exists and the differential
configuration is not suitable for your application. This option
provides less noise rejection than the differential configuration;
however, all 16 analog input channels are available.
26
• Differential − Choose this configuration when you want to
measure thermocouple or low-level signals (less than 1 V), you
are using an A/D converter with high resolution (greater than
12 bits), noise is a significant part of the signal, or common-mode
voltage exists. When you choose the differential configuration,
eight analog input channels are available.
This section describes how to connect single-ended,
pseudo-differential, and differential voltage inputs, as well as current
loop and thermocouple inputs to the module.
Connecting Single-Ended Voltage Inputs
Wiring Signals
Figure 5 shows how to connect single-ended voltage inputs (channels
0, 1, and 8, in this case) to a KUSB-3102 or KUSB-3108 module.
Note: If you are using single-ended inputs, set up the software so
that bias return resistance is not used.
Signal
Source
V
-
Vsource 8
-
Vsource 1
source 0
+
+
+
Analog In 0
Analog In 8
Analog In 1
KUSB-3102 or
KUSB-3108 Module
TB1
TB2
TB3
4
4
4
4
4
4
Isolated Analog Ground*
TB18*
Figure 5: Connecting Single-Ended Voltage Inputs
(Shown for Channels 0, 1, and 8)
TB17
4
*Ensure that you
connect Isolated Analog
Ground to Amp Low.
4
4
27
Chapter 4
Connecting Pseudo-Differential Voltage Inputs
Figure 6 shows how to connect pseudo-differential voltage inputs
(channels 0, 1, and 8, in this case) to a KUSB-3102 or KUSB-3108
module.
Signal
Source
-
source 0
V
-
Vsource 8
-
*
V
CM
Vsource 1
*Make this connection as close to V
possible to reduce ground loop errors. V
common mode voltage for all 16 analog inputs.
+
+
+
Isolated Analog Ground
Amp Low
Analog In 0
Analog In 8
Analog In 1
KUSB-3102 or
KUSB-3108 Module
TB1
TB2
TB3
TB17
TB18
sources as
IN
is the
cm
28
Figure 6: Connecting Pseudo-Differential Voltage Inputs
(Shown for Channels 0, 1, and 8)
Wiring Signals
Note: If you are using pseudo-differential inputs, set up the
software so that bias return resistance is not used.
Connecting Differential Voltage Inputs
Figure 7A illustrates how to connect a floating signal source to a
KUSB-3102 or KUSB-3108 module using differential inputs. (A
floating signal source is a voltage source that has no connection with
earth ground.)
Note: For floating signal sources, it is recommended that you
provide a bias return path for the differential channels by adding
10 kΩ of termination resistance from the low side of the channel to
isolated analog ground.
Figure 7B illustrates how to connect a nonfloating signal source to a
KUSB-3102 or KUSB-3108 module using differential inputs. In this
case, the signal source itself provides the bias return path; therefore,
you do not need to provide bias return resistance through software.
4
4
4
4
4
4
Rs is the signal source resistance while Rv is the resistance required to
balance the bridge. Note that the negative side of the bridge supply
must be returned to analog ground.
4
4
4
29
Chapter 4
A)
Floating
Signal
Source
B)
R
v
R
s
R
s
Bridge
+
-
Analog In 0
Analog In 0
Return
Isolated Analog
Ground
KUSB-3102 or
KUSB-3108 Module
Analog In 0
Analog In 0
Return
.
.
.
TB1
TB2
TB17
TB1
TB2
It is recommended that
you software-select
10 k
Ω of resistance to
connect the low side of
channel 0 to analog
ground (a physical
resistor is not required).
Refer to page 19 for
more information.
30
+
DC Supply
-
.
Isolated
Analog Ground
.
.
TB17
Figure 7: Connecting Differential Voltage Inputs (Shown for Channel 0)
Wiring Signals
Note that since they measure the difference between the signals at the
high (+) and low (−) inputs, differential connections usually cancel
any common-mode voltages, leaving only the signal. However, if you
are using a grounded signal source and ground loop problems arise,
connect the differential signals to the KUSB-3102 or KUSB-3108
module as shown in Figure 8. In this case, make sure that the low side
of the signal (−) is connected to ground at the signal source, not at the
module, and do not tie the two grounds together.
4
4
KUSB-3102 or
KUSB-3108 Module
.
.
.
TB1
TB2
TB17
It is recommended that
you software-select
10 k
Ω of resistance to
connect the low side of
channel 0 to analog
ground (a physical
resistor is not required).
Refer to page 19 for
more information.
+
Analog In 0
Grounded
Signal
Source
Signal Source
Ground V
Figure 8: Connecting Differential Voltage Inputs from a Grounded Signal
E
s
-
g1
Analog In 0
Return
Isolated Analog
Ground
Source (Shown for Channel 0)
4
4
4
4
4
4
4
31
Chapter 4
Connecting Current Loop Inputs
Figure 9 shows how to connect a current loop input (channel 0, in this
case) to a KUSB-3102 or KUSB-3108 module.
+V
CC
4 to 20 mA
Analog Input 0
Analog Input 0
Return
Isolated Analog
Ground
KUSB-3102 or
KUSB-3108 Module
TB1
TB2
.
.
.
TB17
It is recommended that you software-select 10 k
of termination resistance to connect the low side
of channel 0 to analog ground (a physical resistor
is not required). Refer to page 19 for more
information.
User-installed resistor
The user-installed
resistor connects the high
side of the channel to the
low side of the
corresponding channel,
thereby acting as a shunt.
If, for example, you add a
250
Ω resistor, then
connect a 4 to 20 mA
current loop input to
channel 0, the input range
is converted to 1 to 5 V.
Figure 9: Connecting Current Inputs (Shown for Channel 0)
Ω
32
Wiring Signals
.
Note: If you are using current loop inputs, set up the software so
that bias return resistance is used.
Connecting Thermocouple Inputs
The KUSB-3108 module provides cold junction compensation (CJC)
on channel 0 at 10 mV/
to the KUSB-3108 module using channel 0 as a CJC. The accuracy of
the CJC is ±1
Figure 10 shows how to connect a thermocouple input to channel 1 of
a KUSB-3108 module.
No Connection
to Channel 0
+
-
Thermocouple
Input on
Channel 1
Isolated Analog
Ground
° from 5° to 45° C.
KUSB-3108 Module
High
Low
TB2
High
Low
° C. You can attach up to seven thermocouples
TB1
TB3
TB4
.
.
.
TB17
10 kΩ
10 kΩ∗
10 kΩ∗
The 10 kΩ resistor to the CJC, the CJC,
the 10 M
reference are supplied on the
KUSB-3108 module.
Due to the 10 M
reference, the output of the channel
goes to full scale if an open circuit is
detected at the input.
CJC
10 mV/
° C
10 MΩ
+2.5 V Ref
Ω resistor, and the +2.5 V
Ω resistor to the +2.5 V
4
4
4
4
MUX
4
Chan 0
Chan 1
4
4
4
*It is recommended that you software-select 10 kΩ of
termination resistance to connect the low side of
channels 0 and 1 to analog ground (a physical resistor
is not required). Refer to page 19 for more information
Figure 10: Connecting Thermocouple Inputs (Shown for Channel 1)
4
33
Chapter 4
Note: You can connect voltages instead of thermocouples to the
KUSB-3108 module. In this case, ensure that the signal you attach to
channel 0 is capable of driving 10 kΩ, and that the signals you attach
to channels 1, 2, 3, 4, 5, 6, and 7 are capable of driving 10 MΩ.
34
Connecting Analog Output Signals
Figure 11 shows how to connect an analog output voltage signal
(channel 0, in this case) to a KUSB-3102 or KUSB-3108 module.
KUSB-3102 or
KUSB-3108 Module
TB19
TB20
Load
Analog Output 0
Analog Output 0 Return
Wiring Signals
4
4
4
4
Figure 11: Connecting Analog Output Voltages (Shown for Channel 0)
4
4
4
4
4
35
Chapter 4
Connecting Digital I/O Signals
Figure 12 shows how to connect digital input signals (lines 0 and 1,
Port A, in this case) to a KUSB-3102 or KUSB-3108 module.
KUSB-3102 or
KUSB-3108 Module
Digital Input Line 0 (Port A)
TTL Inputs
Digital Input Line 1 (Port A)
Isolated Digital Ground
Figure 12: Connecting Digital Inputs (Shown for Lines 0 and 1, Port A)
Figure 13 shows how to connect a digital output (line 0, Port B, in this
case) to a KUSB-3102 or KUSB-3108 module.
TB28
TB29
TB36
36
Wiring Signals
KUSB-3102 or
0 Out = LED On
500 Ω
+
5 V
-
Figure 13: Connecting Digital Outputs (Shown for Line 0, Port B)
Digital Output Line 0 (Port B)
Isolated Digital Ground
KUSB-3108 Module
TB45
TB37
4
4
4
4
4
4
4
4
4
37
Chapter 4
Connecting Counter/Timer Signals
KUSB-3102 and KUSB-3108 modules provide two user counter/timer
channels that you can use to perform the following operations:
• Event counting,
• Frequency measurement, and
• Pulse output (rate generation, one-shot, and repetitive one-shot).
This section describes how to connect counter/timer signals to
perform these operations. Refer to the KUSB-3102 and KUSB-3108
User’s Manual for more information on using the counter/timers.
Connecting Event Counting Signals
Figure 14 shows one example of connecting event counting signals to
a KUSB-3102 or KUSB-3108 module using user counter 0. In this
example, rising clock edges are counted while the gate is active.
38
Signal Source
KUSB-3102 or
KUSB-3108 Module
User Clock Input 0
External
Gating
Switch
Isolated Digital Ground
Gate 0
Isolated Digital
Ground
Figure 14: Connecting Event Counting Signals
(Shown for Clock Input 0 and External Gate 0)
TB54
TB52
TB51
TB47
Wiring Signals
Figure 15 shows another example of connecting event counting
signals to a KUSB-3102 or KUSB-3108 module using user counter 0. In
this example, a software gate is used to start the event counting
operation; however, this connection is not required.
4
KUSB-3102 or
KUSB-3108 Module
User Clock Input 0
Signal Source
Figure 15: Connecting Event Counting Signals without an External Gate
Input (Shown for Clock Input 0)
Figure 16 shows an example of how to cascade two counters
externally to perform an event counting operation using user
counters 0 and 1. Note that you can also internally cascade counters
using software; if you internally cascade the counters, you do not
need to make the external cascading connections.
Isolated Digital
Ground
TB54
TB51
4
4
4
4
4
4
4
4
39
Chapter 4
User Clock Input 0
Signal
Source
External
Gating
Switch
Gate 0
Isolated Digital
Ground
Gate 1
Isolated Digital Ground
TB53
TB50
KUSB-3102 or
KUSB-3108 Module
Figure 16: Cascading Counters (Shown for Event Counting Using
Counters 0 and 1 and External Gate 0)
Connecting Frequency Measurement Signals
This section describes two examples of how to connect frequency
measurement signals to a KUSB-3102 or KUSB-3108 module.
The first configuration uses the same wiring as an event counting
application that does not use an external gate signal (see Figure 15 on
page 39); a system timer specifies the duration of the frequency
measurement. In this configuration, the frequency of the clock input
is the number of counts divided by the duration of the Windows
timer.
TB54
TB52
TB51
TB48
TB47
User
Counter
Output 0
User Clock
Input 1
40
Signal Source
Wiring Signals
If you need more accuracy than the system timer provides, you can
connect a pulse of a known duration (such as a one-shot output of
another user counter) to the external gate input, as shown in Figure
17. In this configuration, the frequency of the clock input is the
number of counts divided by the period of the external gate input.
KUSB-3102 or
KUSB-3108 Module
User Clock Input 0
Gate 0
Isolated Digital Ground
TB54
TB52
TB49
TB47
User
Counter
Output 1
4
4
4
4
Figure 17: Connecting Frequency Measurement Signals
(Shown for Clock Input 0 and External Gate 0)
4
4
4
4
4
41
Chapter 4
Connecting Pulse Output Signals
Figure 18 shows one example of connecting pulse output signals to a
a KUSB-3102 or KUSB-3108 module using user counter 0.
KUSB-3102 or
KUSB-3108 Module
Heater
controller
External
Gating
Switch
User Clock Output 0
Gate 0
Isolated Digital
Ground
Isolated Digital Ground
TB53
TB52
TB51
TB47
Figure 18: Connecting Pulse Output Signals
(Shown for Counter Output 0 and Gate 0)
Figure 19 shows an example of how to externally cascade two
counters to perform a rate generation operation using user counters 0
and 1. Note that you can also cascade counters internally using
software; if you internally cascade the counters, you do not need to
make the external cascading connections. In this example, counter 1
gate is logic high.
42
Wiring Signals
User Clock Input 0
Signal
Source
Figure 19: Cascading Counters (Shown for Rate Generation Using
External
Gating
Switch
Counters 0 and 1 and External Gate 0)
Figure 20 shows an example of how to cascade two counters
externally to perform a one-shot operation using user counters 0 and
1. Note that you can also internally cascade counters using software;
if you internally cascade the counters, you do not need to make the
external cascading connections. In this example, counter 0 gate is
logic high.
Gate 0
Isolated Digital
Ground
Isolated Digital Ground
TB53
TB50
KUSB-3102 or
KUSB-3108 Module
TB54
TB52
TB51
TB47
User
Counter
Output 0
User Clock
Input 1
4
4
4
4
4
4
4
4
4
43
Chapter 4
KUSB-3102 or
KUSB-3108 Module
User Clock Input 0
Signal
Source
One-Shot
Tri gger
Isolated Digital
Ground
Gate 1
Isolated Digital Ground
TB53
TB50
Figure 20: Cascading Counters (Shown for One-Shot Using
Counters 0 and 1 and External Gate 1)
TB54
TB51
TB48
TB47
User
Counter
Output 0
User Clock
Input 1
44
5
Verifying the Operation of a
Module
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Running the Quick Data Acq Application . . . . . . . . . . . . . . . . . . 48
45
Chapter 5
Prepare to Use a Module
(see Chapter 2 starting on page 5)
Install the Module and Configure and
Device Driver
(see Chapter 3 starting on page 11)
Wire Signals
(see Chapter 4 starting on page 21)
Verify the Operation of the Module
(this chapter)
46
Overview
Quick Data Acq allows you to perform the following operations:
• Acquire data from a single analog input channel or digital input
• Acquire data continuously from one or more analog input
Verifying the Operation of a Module
5
port;
5
channels using an oscilloscope, strip chart, or Fast Fourier
Transform (FFT) view;
• Measure the frequency of events;
• Output data from a single analog output channel or digital
output port;
• Output pulses either continuously or as a one-shot; and
• Save the input data to disk.
Quick Data Acq is installed automatically when you install the driver
software, described on page 11.
5
5
5
5
5
5
5
47
Chapter 5
Running the Quick Data Acq Application
To run the Quick Data Acq application, perform the following steps:
1. If you have not already done so, power up your computer and
any attached peripherals.
2. Select Quick Data Acq from the Keithley Instruments\Quick
Data Acq program group.
Note: The Quick Data Acq application allows you to verify basic
operations on the module; however, it may not support all of the
module’s features.
For information on each of the features provided, use the online help
for the Quick Data Acq application by pressing F1 from any view or
selecting the Help menu.
For detailed information on the supported features of the module,
refer to the KUSB-3102 and KUSB-3108 User’s Manual.
48
Verifying the Operation of a Module
Performing a Single-Value Analog Input Operation
To verify that the module can read a single analog input value,
perform the following steps:
1. Connect a voltage source, such as a function generator, to analog
input channel 0 (differential mode) on the module. Refer to page
29 for an example of how to connect a differential analog input.
2. Click the Acquisition menu.
3. Click Single Analog Input.
4. Select the appropriate module from the Board list box.
5. Once you select the module, the LED on the module turns red.
6. In the Channel list box, select analog input channel 0.
7. In the Range list box, select the range for the channel.
The default is ±10 V.
8. Select Differential.
9. Click Get to acquire a single value from analog input channel 0.
The value is displayed on the screen in both text and graphical form.
5
5
5
5
5
5
5
5
5
49
Chapter 5
Performing a Single-Value Analog Output Operation
To verify that the module can output a single analog output value,
perform the following steps:
1. Connect an oscilloscope or voltmeter to DAC 0 on the module.
Refer to page 35 for an example of how to connect analog output
signals.
2. Click the Control menu.
3. Click Single Analog Output.
4. Select the appropriate module from the Board list box.
Note: Once you select the module, the LED on the module turns
red.
5. In the Channel list box, select analog output channel 0.
50
6. In the Range list box, select the output range of DAC 0.
The default is ±10 V.
7. Enter an output value, or use the slider to select a value to output
from DAC0.
8. Click Send to output a single value from DAC 0.
The value that is output is displayed on the screen in both text and
graphical form.
Verifying the Operation of a Module
Performing a Continuous Analog Input Operation
To verify that the module can perform a continuous analog input
operation, perform the following steps:
1. Connect known voltage sources, such as the outputs of a function
generator, to analog input channels 0 and 1 on the module (using
the differential configuration). Refer to page 29 for an example of
how to connect a differential analog input.
2. Click the Acquisition menu.
3. For this example, click Scope.
4. Select the appropriate module from the Board list box.
Note: Once you select the module, the LED on the module turns
red.
5. In the Sec/Div list box, select the number of seconds per division
(.1 to .00001) for the display.
6. In the Channels list box, select analog input channel 1, then click
Add to add the channel to the channel list.
Note that, by default, channel 0 is included in the channel list.
5
5
5
5
5
5
7. Click Config from the Toolbar.
8. From the Config menu, select ChannelType, then select
Differential.
9. From the Config menu, select Range, then select Bipolar or
Unipolar depending on the configuration of your module.
The default is Bipolar.
5
5
5
51
Chapter 5
10. From the Scope view, double-click the input range of the channel
to change the input range of the module (±10 V, ±5 V, ±2.5 V,
±1.25 V for bipolar ranges or 0 to 10 V, 0 to 5 V, 0 to 2.5 V or 0 to
1.25 V for unipolar ranges). The default is ±10 V.
The display changes to reflect the selected range for all the analog input
channels on the module.
11. In the Trigger box, select Auto to acquire data continuously from
the specified channels or Manual to acquire a burst of data from
the specified channels.
12. Click Start from the Toolbar to start the continuous analog input
operation.
The values acquired from each channel are displayed in a unique color
on the oscilloscope view.
Note: When the module is performing a continuous Scope or
FFT operation, the LED on the module turns green (the resulting
color may appear yellow).
52
13. Click Stop from the Toolbar to stop the operation.
Verifying the Operation of a Module
Performing a Single-Value Digital Input Operation
To verify that the module can read a single digital input value,
perform the following steps:
1. Connect a digital input to digital input line 0 of port A on the
module. Refer to page 36 for an example of how to connect a
digital input.
2. Click the Acquisition menu.
3. Click Digital Input.
4. Select the appropriate module from the Board list box.
Note: Once you select the module, the LED on the module turns
red.
5. Select digital input port A by clicking Port A.
6. Click Get.
The value of each digital input line in port A is displayed on the screen
in both text and graphical form.
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5
5
5
5
5
5
5
5
53
Chapter 5
Performing a Single-Value Digital Output Operation
To verify that the module can output a single digital output value,
perform the following steps:
1. Connect a digital output to digital output line 0 of port B on the
module. Refer to page 36 for an example of how to connect a
digital output.
2. Click the Control menu.
3. Click Digital Output.
4. Select the appropriate module from the Board list box.
Note: Once you select the module, the LED on the module turns
red.
5. Select digital output port B by clicking Port B.
6. Click the appropriate bits to select the type of signal to write from
the digital output lines. If the bit is selected, a high-level signal is
output from the digital output line; if the bit is not selected, a
low-level signal is output from the digital output line.
Optionally, you can enter an output value in the Hex text box.
54
7. Click Send.
The value of each digital output line of digital port B is output and
displayed on the screen in both text and graphical form.
Verifying the Operation of a Module
Performing a Frequency Measurement Operation
To verify that the module can perform a frequency measurement
operation, perform the following steps:
1. Wire an external clock source to counter/timer 0 on the module.
Refer to page 40 for an example of how to connect an external
clock.
Note: The Quick Data Acq application works only with
counter/timer 0.
2. Click the Acquisition menu.
3. Click Frequency Counter.
4. Select the appropriate module from the Board list box.
Note: Once you select the module, the LED on the module turns
red.
5. In the Count Duration text box, enter the number of seconds
during which events will be counted.
5
5
5
5
5
5
6. Click Start to start the frequency measurement operation.
The operation automatically stops after the number of seconds you
specified has elapsed, and the frequency is displayed on the screen.
If you want to stop the frequency measurement operation when it is
in progress, click Stop.
5
5
5
55
Chapter 5
Performing a Pulse Output Operation
To verify that the module can perform a pulse output operation,
perform the following steps:
1. Connect a scope to counter/timer 0 on the module. Refer to page
42 for an example of how to connect a scope (a pulse output) to
counter/timer 0.
Note: The Quick Data Acq application works only with
counter/timer 0.
2. Click the Control menu.
3. Click Pulse Generator.
4. Select the appropriate module from the Board list box.
Note: Once you select the module, the LED on the module turns
red.
56
5. Select either Continuous to output a continuous pulse stream or
One Shot to output one pulse.
6. Select either Low-to-high to output a rising-edge pulse (the high
portion of the total pulse output period is the active portion of
the signal) or High-to-low to output a falling-edge pulse (the low
portion of the total pulse output period is the active portion of
the signal).
7. Enter a percentage or use the slider to select a percentage for the
pulse width. The percentage determines the duty cycle of the
pulse.
Verifying the Operation of a Module
8. Click Start to generate the pulse(s).
The results are displayed both in text and graphical form.
9. Click Stop to stop a continuous pulse output operation. One-shot
pulse output operations stop automatically.
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5
5
5
5
5
5
5
5
57
Chapter 5
58
Index
A
analog inputs 49, 51
current loops
differential configuration
pseudo-differential configuration
28
single-ended configuration
thermocouple
analog outputs
application wiring
analog outputs
current loop analog inputs
differential analog inputs
digital inputs and outputs
event counting applications
externally cascaded counter/timers
39, 42, 43
frequency measurement applications
40
pseudo-differential analog inputs
pulse output applications
single-ended analog inputs
thermocouple analog inputs
attaching the module to the computer
13
32
26, 29
26,
26, 27
33
35, 50
35
32
29
36
38, 39
28
42
27
33
B
bias return resistance 19, 29
cascading counters, externally
43
CJC
33
configuring the device driver
connecting signals
analog outputs
current loop analog inputs
differential analog inputs
digital inputs and outputs
event counting applications
externally cascaded counter/timers
39, 42, 43
frequency measurement applications
40
pseudo-differential analog inputs
pulse output applications
single-ended analog inputs
thermocouple analog inputs
connecting to the host computer
directly
using a self-powered USB hub
conventions used
counter/timers
cascading externally
connecting event counting signals
connecting frequency measurement
connecting pulse output signals
current loop inputs
14
39
signals
35
x
40
39, 42,
19
32
29
36
38, 39
28
42
27
33
16
39, 42, 43
38,
42
32
C
calibration utility 3
59
Index
D
DataAcq SDK 3
device driver
differential inputs
digital I/O
digital inputs
digital outputs
DT-LV Link
DTx-EZ
3, 19
26
36
53
54
3
3
E
event counting 38
F
frequency measurement 40, 55
H
hot-swapping 15, 18
I
input configuration
differential analog
pseudo-differential analog
single-ended analog
26
26
26
O
output pulses 42, 56
P
pseudo-differential inputs 26
pulse outputs
42, 56
Q
Quick Data Acq 3
running
48
R
related documents x
requirements
running the Quick Data Acq
application
8
48
S
single-ended inputs 26
software supported
system requirements
3
8
T
thermocouple inputs 33
U
unpacking 7
W
wiring signals
analog outputs
current loop analog inputs
differential analog inputs
digital inputs and outputs
event counting applications
externally cascading counter/timers
39, 42, 43
frequency measurement applications
40
35
32
29
36
38, 39
60
pseudo-differential analog inputs 28
pulse output applications
single-ended analog inputs
thermocouple analog inputs
42
27
33
Index
61
Index
62
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