Data Translation DT9816 Instruction Manual
UM-21336-C
DT9816
User’s Manual
Third Edition
March, 2006
Copyright © 2006 by Data Translation, Inc.
All rights reserved.
Information furnished by Data Translation, Inc.
is believed to be accurate and reliable; however,
no responsibility is assumed by Data
Translation, Inc. for its use; nor for any
infringements of patents or other rights of third
parties which may result from its use. No license
is granted by implication or otherwise under any
patent rights of Data Translation, Inc.
Use, duplication, or disclosure by the United
States Government is subject to restrictions as set
forth in subparagraph (c)(1)(ii) of the Rights in
Technical Data and Computer software clause at
48 C.F.R, 252.227-7013, or in subparagraph (c)(2)
of the Commercial computer Software Registered Rights clause at 48 C.F.R., 52-227-19 as
applicable. Data Translation, Inc., 100 Locke
Drive, Marlboro, MA 01752
Data Translation® is a registered trademark of
Data Translation, Inc. DT-Open Layers
DataAcq SDK
TM
Link
, and DTx-EZTM are trademarks of Data
TM
, DataAcq OMNI CDTM, DT-LV
TM
,
Translation, Inc.
Data Translation, Inc.
100 Locke Drive
Marlboro, MA 01752-1192
(508) 481-3700
www.datatranslation.com
Fax: (508) 481-8620
E-mail: info@datx.com
All other brand and product names are
trademarks or registered trademarks of their
respective companies.
Radio and Television Interference
This equipment has been tested and found to comply with CISPR
EN55022 Class A, and EN50082-1 (CE) requirements and also with
the limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference, in which case
the user will be required to correct the interference at his own
expense.
Changes or modifications to this equipment not expressly approved
by Data Translation could void your authority to operate the
equipment under Part 15 of the FCC Rules.
Note: This product was verified to meet FCC requirements under
test conditions that included use of shielded cables and connectors
between system components. It is important that you use shielded
cables and connectors to reduce the possibility of causing
interference to radio, television, and other electronic devices.
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class A limits for radio
noise emissions from digital apparatus set out in the Radio
Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant les limites applicables aux appareils numériques de la class
A prescrites dans le Règlement sur le brouillage radioélectrique
édicté par le Ministère des Communications du Canada.
Table of Contents
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
How this Manual is Organized . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . 11
Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Where To Get Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 1: Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Key Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Simultaneous Analog Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . 14
Counter/Timer Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Clocks and Triggers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Supported Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Getting Started Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Part 1: Getting Started . . . . . . . . . . . . . . . . . . . . 19
Chapter 2: Preparing to Use a Module. . . . . . . . . . . . . . . . . 21
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Checking the System Requirements . . . . . . . . . . . . . . . . . . . . . . . 23
Installing the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chapter 3: Setting Up and Installing
the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Attaching Modules to the Computer . . . . . . . . . . . . . . . . . . . . . . 27
Connecting Directly to the USB Ports . . . . . . . . . . . . . . . . . . 28
Connecting to an Expansion Hub. . . . . . . . . . . . . . . . . . . . . . 29
Changing the Name of a Module (Optional) . . . . . . . . . . . . . . . . 31
5
Contents
Chapter 4: Wiring Signals to the Module. . . . . . . . . . . . . . . 33
Preparing to Wire Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Wiring Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Wiring Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Connecting Single-Ended Analog Input Signals . . . . . . . . . . . . . 37
Connecting Digital I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Connecting Counter/Timer Signals . . . . . . . . . . . . . . . . . . . . . . . 39
Connecting Signals for Event Counting . . . . . . . . . . . . . . . . 39
Connecting Signals for Frequency Measurement . . . . . . . . 41
Connecting Signals for Rate Generation . . . . . . . . . . . . . . . . 42
Chapter 5: Verifying the Operation
of a Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Using the Oscilloscope Function . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Using the Chart Recorder Function . . . . . . . . . . . . . . . . . . . . . . . 48
Using the Voltmeter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Using the File Viewer Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Using the Digital Input Function . . . . . . . . . . . . . . . . . . . . . . . . . 51
Using the Digital Output Function . . . . . . . . . . . . . . . . . . . . . . . . 52
Using the Counter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Using the Rate Generator Function . . . . . . . . . . . . . . . . . . . . . . . 54
Part 2: Using Your Module . . . . . . . . . . . . . . . . . 55
Chapter 6: Principles of Operation . . . . . . . . . . . . . . . . . . . 57
Analog Input Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Input Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Analog Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Specifying a Single Analog Input Channel . . . . . . . . . 60
Specifying One or More Analog Input Channels . . . . 60
6
Input Ranges and Gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Input Sample Clock Sources . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Analog Input Conversion Modes . . . . . . . . . . . . . . . . . . . . . 61
Single-Value Operations . . . . . . . . . . . . . . . . . . . . . . . . . 61
Continuous Scan Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Input Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Data Format and Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Digital I/O Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Digital I/O Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Counter/Timer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
C/T Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
C/T Clock Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Gate Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Pulse Duty Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Counter/Timer Operation Modes . . . . . . . . . . . . . . . . . . . . . 69
Event Counting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Frequency Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 70
Rate Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Contents
Chapter 7: Supported Device Driver Capabilities. . . . . . . . 73
Data Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Buffering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
DMA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Triggered Scan Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Synchronous Digital I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
7
Contents
Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Clocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Counter/Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Chapter 8: Programming Flowcharts. . . . . . . . . . . . . . . . . . 87
Single-Value Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Continuous A/D Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Event Counting Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Frequency Measurement Operations . . . . . . . . . . . . . . . . . . . . . . 95
Pulse Output Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Chapter 9: Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 107
General Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
If Your Module Needs Factory Service . . . . . . . . . . . . . . . . . . . . 112
Appendix A: Specifications . . . . . . . . . . . . . . . . . . . . . . . . 113
Appendix B: Screw Terminal Assignments . . . . . . . . . . . 119
Appendix C: Reading from or Writing to the Digital Registers
121
8
The first part of this manual describes how to install and set up your
DT9816 module and software, and verify that your module is
working properly.
The second part of this manual describes the features of the DT9816
module and device driver, and how to program these modules using
the DT-Open Layers™ software. It also provides troubleshooting
information. Unless otherwise specified, all references to the DT9816
module refer to both the DT9816 and DT9816-A model numbers.
Intended Audience
This document is intended for engineers, scientists, technicians, or
others responsible for using and/or programming the DT9816
module for analog input, digital I/O, or counter/timer operations in
the Microsoft® Windows® 2000 or Windows XP operating system. It
is assumed that you have some familiarity with data acquisition
principles and that you understand your application.
About this Manual
How this Manual is Organized
This manual is organized as follows:
• Chapter 1, “Overview,” describes the major features of the
DT9816 module, as well as the supported software and
accessories for the module.
• Chapter 2, “Preparing to Use a Module,” describes how to
unpack the module, check the system requirements, and install
the software.
• Chapter 3, “Setting Up and Installing the Module,” describes
how to install the module and how to configure the device driver.
9
About this Manual
• Chapter 4, “Wiring Signals to the Module,” 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 GO!
application.
• Chapter 6, “Principles of Operation,” describes all of the features
of the DT9816 module and how to use them in your application.
• Chapter 7, “Supported Device Driver Capabilities,” lists the
supported subsystems and the associated capabilities accessible
using the device driver for the DT9816 module.
• Chapter 8, “Programming Flowcharts,” describes the processes
you must follow to program the subsystems of a DT9816 module
using DT-Open Layers-compliant software.
• Chapter 9, “Troubleshooting,” provides information that you can
use to resolve problems with a DT9816 module, should they
occur.
• Appendix A, “Specifications,” lists the specifications of the
DT9816 module.
10
• Appendix B, “Screw Terminal Assignments,” shows the screw
terminal assignments of the DT9816 module.
• Appendix C, “Reading from or Writing to the Digital Registers,”
describes how to access the module’s registers directly.
• An index completes this manual.
Conventions Used in this Manual
The following conventions are used in this manual:
• Notes provide useful information or 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.
Related Information
Refer to the following documents for more information on using the
DT9816 module:
• Benefits of the Universal Serial Bus for Data Acquisition. This white
paper describes why USB is an attractive alternative for data
acquisition. It is available on the Data Translation web site
(www.datatranslation.com).
About this Manual
• DT Measure Foundry Getting Started Manual (UM-19298) and
online help. These documents describe how to use DT Measure
Foundry™ to build drag-and-drop test and measurement
applications for Data Translation® data acquisition devices
without programming.
• DataAcq SDK User’s Manual (UM-18326). For programmers who
are developing their own application programs using the
Microsoft C compiler, this manual describes how to use the
DT-Open Layers DataAcq SDK™ to access the capabilities of
Data Translation data acquisition devices.
• DTx-EZ Getting Started Manual (UM-15428). This manual
describes how to use the ActiveX controls provided in DTx-EZ™
to access the capabilities of Data Translation data acquisition
devices in Microsoft Visual Basic® or Visual C++®.
11
About this Manual
Where To Get Help
• DT-LV Link Getting Started Manual (UM-15790). This manual
describes how to use DT-LV Link™ with the LabVIEW™
graphical programming language to access the capabilities of
Data Translation data acquisition devices.
• DAQ Adaptor for MATLAB (UM-22024). This document describes
how to use Data Translation’s DAQ Adaptor to provide an
interface between the MATLAB Data Acquisition subsystem
from The MathWorks and Data Translation’s DT-Open Layers
architecture.
• Microsoft Windows 2000 or Windows XP documentation.
• USB web site (http://www.usb.org).
Should you run into problems installing or using a DT9816 module,
the Data Translation Technical Support Department is available to
provide technical assistance. Refer to Chapter 9 for more information.
If you are outside the United States or Canada, call your local
distributor, whose number is listed on Data Translation’s web site
(www.datatranslation.com).
12
1
Overview
Key Hardware Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Supported Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Getting Started Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
13
Chapter 1
Key Hardware Features
The DT9816 module is part of the ECONseries of economy,
multifunction mini-instruments. Tab le 1 lists the key features of the
module.
Table 1: Key Features of the DT9816 Module
Analog
Analog
Module
DT9816 6 SE 16-bit ±10 V
DT9816-A 6 SE 16-bit ±10 V
a. Actual maximum is 153.846 kHz. If you use the olDaSetClockFrequency function to set
150 kHz, the olDaGetClockFrequency function will not return the true value (153.846
kHz) until after you invoke the olDaConfig function.
Inputs
Input
Resolution
I/O
Range
or ± 5 V
or ± 5 V
Analog Input
Sample Rate
50 kS/s per
channel
150 kS/s per
channel
a
Digital
I/O
8 in/
8 out
8 in/
8 out
The DT9816 is a low-power device (less than 100 mA draw).
Simultaneous Analog Inputs
The DT9816 module features six independent, 16-bit,
successive-approximation A/D converters with track-and-hold
circuitry. Each converter uses a common clock and trigger for
simultaneous sampling of all six analog input signals at up to 50 kHz
per channel (DT9816) or up to 150 kHz per channel (DT9816-A). All
channels in the channel-gain list are read simultaneously on a single
pulse of the internal clock.
C/T
1
1
14
The DT9816 module provides gains of 1 and 2, for effective full-scale
input signal ranges of
±10 V and ±5 V.
Counter/Timer Channel
Overview
The DT9816 module supports one 16-bit counter/timer channel. This
counter/timer allows you to perform event counting, frequency
measurement, and continuous pulse output (rate generation)
operations.
Clocks and Triggers
The DT9816 modules supports an internal trigger and clock or an
external trigger and clock.
Use the internal trigger to start an analog input operation based on a
software command, or use the external trigger to start an analog
input operation based on an external event.
Use the external clock signal to pace an analog input operation at a
rate not available with the internal clock or when you want to pace at
uneven intervals.
Supported Software
The following software is available for use with the DT9816 module,
and is provided on the ECON CD:
1
1
1
1
1
1
• Device Driver – The DT9816 Device Driver allows you to use a
DT9816 module with any of the supported software packages or
utilities. Refer to Chapter 2 for more information on loading the
device driver.
• GO! application − The GO! application provides a quick way to
measure and control data from a DT9816 module right out of the
box. The following instrument views make acquiring data and
controlling signals easy: oscilloscope, chart recorder, file viewer,
digital voltmeter, digital input, digital output, frequency counter,
1
1
1
15
Chapter 1
and rate generator. Refer to Chapter 5 for more information on
this application.
• DT Measure Foundry – An evaluation version of this software is
included or provided via a link on the ECON CD. DT Measure
Foundry is drag-and-drop test and measurement application
builder designed to give you top performance with ease-of-use
development. Order the full development version of this
software package to develop your own application using real
hardware.
• DataAcq SDK – Use the Data Acq SDK if you want to develop
your own application software for the DT9816 module using the
Microsoft C compiler; the DataAcq SDK complies with the
DT-Open Layers standard.
• DTx-EZ – Use this optional software package if you want to use
ActiveX controls to access the capabilities of the DT9816 module
using Microsoft Visual Basic or Visual C++; DTx-EZ complies
with the DT-Open Layers
standard.
• DAQ Adaptor for MATLAB – Data Translation’s DAQ Adaptor
provides an interface between the MATLAB Data Acquisition
(DAQ) subsystem from The MathWorks and Data Translation’s
DT-Open Layers architecture.
16
• DT-LV Link – Use this optional software package if you want to
use the LabVIEW graphical programming language to access the
capabilities of the DT9816 module.
Getting Started Procedure
The flow diagram shown in Figure 1 illustrates the steps needed to
get started using the DT9816 module. This diagram is repeated in
each chapter; the shaded area in the diagram shows you where you
are in the getting started procedure.
Prepare to Use the Module
(see Chapter 2 starting on page 21)
Set Up and Install the Module
(see Chapter 3 starting on page 25)
Overview
1
1
1
Wire Signals to the Module
(see Chapter 4 starting on page 33)
Verify the Operation of the Module
(see Chapter 5 starting on page 43)
Figure 1: Getting Started Flow Diagram
1
1
1
1
1
1
17
Chapter 1
18
Part 1: Getting Started
2
Preparing to Use a Module
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Checking the System Requirements . . . . . . . . . . . . . . . . . . . . . . . 23
Installing the Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
21
Chapter 2
Prepare to Use the Module
(this chapter)
Set Up and Install the Module
(see Chapter 3 starting on page 25)
Wire Signals to the Module
(see Chapter 4 starting on page 33)
Verify the Operation of the Module
(see Chapter 5 starting on page 43)
Unpacking
Open the shipping box and verify that the following items are
present:
22
• DT9816 module
• ECON CD
•USB cable
If an item is missing or damaged, contact Data Translation. If you are
in the United States, call the Customer Service Department at (508)
481-3700. An application engineer will guide you through the
appropriate steps for replacing missing or damaged items. If you are
located outside the United States, call your local distributor (see Data
Translation’s web site (www.datatranslation.com) for contact
information).
Once you have unpacked your module, check the system
requirements, as described in the next section.
Preparing to Use a Module
Checking the System Requirements
For reliable operation, your DT9816 module requires the following:
• Windows 2000 or Windows XP (Professional Edition) operating
system.
For USB Ver. 2.0 support, make sure that you install Service Pack
2 (for Windows XP) or Service Pack 4 (for Windows 2000). In
addition, for some systems, you may have to disable standby
mode. If you are not sure whether you are using USB Ver. 1.1 or
Ver. 2.0, run the Open Layers Control Panel applet, described on
page 27.
• One or more USB ports (Ver. 2.0 or Ver. 1.1). USB Ver. 2.0 is
recommended for optimal performance.
•One CD-ROM drive.
Once you have verified that your system meets the system
requirements, install the software, as described in the next section.
2
2
2
2
2
2
2
2
2
23
Chapter 2
Installing the Software
To install the device driver, Data Acq SDK, DTx-EZ, and the GO!
application, do the following:
1. Insert the ECON CD into your CD-ROM drive.
If the software runs automatically (the default condition),
continue with step 4.
2. If the software does not run automatically, click Start from the
Task Bar, and 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 GO!
5. Click Install now!
The installation wizard appears.
6. Click Next.
The wizard prompts you for the destination location.
24
7. Either change the directory path and/or name using Browse or
accept the default directory (C:\Program Files\Data Translation),
and then click Next.
8. Click Next to copy the files.
9. Click Finish.
10. If you want to install DT-LV Link, click Install Additional
Software, click Install now! under the LabVIEW Link section,
and follow the installation prompts.
11. When you have finished the installation process, click Quit
Installer.
Continue with the instructions in Chapter 3 starting on page 25.
3
Setting Up and Installing
the Module
Attaching Modules to the Computer. . . . . . . . . . . . . . . . . . . . . . . 27
Changing the Name of a Module (Optional) . . . . . . . . . . . . . . . . 31
25
Chapter 3
Prepare to Use the Module
(see Chapter 2 starting on page 21)
Set Up and Install the Module
(this chapter)
Wire Signals to the Module
(see Chapter 4 starting on page 33)
Verify the Operation of the Module
(see Chapter 5 starting on page 43)
Note: The DT9816 module is factory-calibrated and requires no
further adjustment.
26
Setting Up and Installing the Module
Attaching Modules to the Computer
This section describes how to attach a DT9816 module to the host
computer.
Note: Most computers have several USB ports that allow direct
connection to USB devices. If your application requires more DT9816
modules than you have USB ports for, you can expand the number
of USB devices attached to a single USB port by using expansion
hubs. For more information, refer to page 29.
You can unplug a module, and 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
27
Chapter 3
Connecting Directly to the USB Ports
To connect DT9816 modules directly to the USB ports of your
computer, do the following:
1. Attach one end of the USB cable to the USB port on the module.
2. Attach the other end of the USB cable to one of the USB ports on
the host computer, as shown in Figure 2.
The operating system automatically detects the USB module and starts
the Found New Hardware wizard.
DT9816 Modules
USB Ports
Host Computer
28
USB Cable
Figure 2: Attaching the Module to the Host Computer
3. Click Next and/or Finish in the wizard. Once the firmware is
loaded, the wizard restarts to initiate the firmware to accept
commands. Click Next and/or Finish again.
If the power supply and module are attached correctly, the LED turns
green.
4. Repeat the steps to attach another DT9816 module to the host
computer, if desired.
Connecting to an Expansion Hub
Setting Up and Installing the Module
Expansion hubs are powered by their own external power supply.
Theoretically, you can connect up to five expansion hubs to a USB
port on the host computer. However, the practical number of DT9816
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 modules.
To connect multiple DT9816 modules to an expansion hub, do the
following:
1. Attach one end of the USB cable to the module and the other end
of the USB cable to an expansion hub.
2. Connect the power supply for the expansion hub to an external
power supply.
3. Connect the expansion hub to the USB port on the host computer
using another USB cable.
The operating system automatically detects the USB module and starts
the Found New Hardware wizard.
4. Click Next and/or Finish in the wizard. Once the firmware is
loaded, the wizard restarts to initiate the firmware to accept
commands. Click Next and/or Finish again.
If the power supply and module are attached correctly, the LED turns
green.
3
3
3
3
3
3
5. Repeat these steps until you have attached the number of
expansion hubs (up to five) and modules (up to four per hub)
that you require. Refer to Figure 3.
The operating system automatically detects the USB devices as they are
installed.
3
3
3
29
Chapter 3
Host Computer
DT9816 Module
USB Cables
USB Cable
Power Supply
for Hub
DT9816 Module
USB Cables
DT9816 Module
USB Cable
Expansion Hubs
DT9816 Module
Figure 3: Attaching Multiple DT9816 Modules
Using Expansion Hubs
Power Supply
for Hub
30
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