Data Translation DT351 User manual

R
DT351 User’s
UM-19140-A
Manual

First Edition
August, 2001
Data Translation, Inc.
100 Locke Drive
Marlboro, MA 01752-1192
[phone]
www.datatranslation.com
Fax: [phone]
E-mail: [e-mail]
Copyright © 2001 by Data Translation, Inc.
All rights reserved. No part of this publication
may be reproduced, stored in a retrieval system,
or transmitted, in any form by any means,
electronic, mechanical, by photocopying,
recording, or otherwise, without the prior
written permission of Data Translation, Inc.
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 LayersTM,
Data Acq SDKTM, Data Acquisition OMNI CDTM,
DT-LV LinkTM, DTx-EZTM, and DT VPITM are
trademarks of Data Translation, Inc.
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
édictépar le Ministère des Communications du Canada.

v
Table of Contents
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Intended Audience. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
What You Should Learn from this Manual. . . . . . . . . . . . . . . . . . vii
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . viii
Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Where To Get Help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Chapter 1: Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Supported Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2: Principles of Operation . . . . . . . . . . . . . . . . . . . . 7
Digital I/O Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 3: Supported Device Driver Capabilities. . . . . . . . 13
Chapter 4: Programming Flowcharts. . . . . . . . . . . . . . . . . . 23
Single-Value Digital I/O Operations. . . . . . . . . . . . . . . . . . . . . . . 25
Continuous Digital Input Operations . . . . . . . . . . . . . . . . . . . . . . 27

Contents
vi
Chapter 5: Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 31
General Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Service and Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Telephone Technical Support. . . . . . . . . . . . . . . . . . . . . . . . . . 35
E-Mail and Fax Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
World-Wide Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
If Your Board Needs Factory Service. . . . . . . . . . . . . . . . . . . . . . . 39
Appendix A: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 41
Appendix B: Connector Pin Assignments . . . . . . . . . . . . . 45
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

vii
About this Manual
This manual describes the features of the DT351 board, the
capabilities of the DT351 Device Driver, and how to program the
DT351 board using DT-Open Layerssoftware. Troubleshooting and
calibration information is also provided.
Intended Audience
This document is intended for engineers, scientists, technicians, or
others responsible for using and/or programming the DT351 board
for data acquisition operations in Microsoft®Windows®98,
Windows 2000, or Windows Me (Millennium Edition). It is assumed
that you have some familiarity with data acquisition principles and
that you understand your application.
What You Should Learn from this Manual
This manual provides detailed information about the features of the
DT351 board and the capabilities of the DT351 Device Driver. The
manual is organized as follows:
•Chapter 1, “Overview,”describes the major features of the board,
as well as the supported software and accessories for the board.
•Chapter 2, “Principles of Operation,”describes all of the board’s
features and how to use them in your application.
•Chapter 3, “Supported Device Driver Capabilities,”lists the data
acquisition subsystems and the associated features accessible
using the DT351 Device Driver.
•Chapter 4, “Programming Flowcharts,”describes the processes
you must follow to program the subsystems on the DT351 board
using DT-Open Layers-compliant software.

About this Manual
viii
•Chapter 5, “Troubleshooting,”provides information that you can
use to resolve problems with the board and the device driver,
should they occur.
•Appendix A, “Specifications,”lists the specifications of the
board.
•Appendix B, “Connector Pin Assignments,”shows the pin
assignments for the connectorsonthe boardandfor the STP37
screw termination panel.
•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 inbold.
Related Information
Refer to the following documents for more information on using the
DT351 board:
•DT351 Getting Started Manual (UM-19138). This manual, provided
on the Data Acquisition OMNI CDTM, describes the how to install
the DT351 board and related software.

About this Manual
ix
•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 LayersTM Data Acq SDK to access the capabilities of
Data Translation®data acquisition boards. This manual is
provided on the Data Acquisition OMNI CD.
•DTx-EZ Getting Started Manual (UM-15428). This manual
describes how to use the ActiveX controls provided in DTx-EZTM
to access the capabilities of Data Translation’s data acquisition
boards in Microsoft®Visual Basic®or Visual C++®.
•DT VPI User Manual (UM-16150). This manual describes how to
use DT VPITM and the Agilent®VEE™visual programming
language to access the capabilities of Data Translation’s data
acquisition boards.
•DT-LV Link Getting Started Manual (UM-15790). This manual
describes how to use DT-LV LinkTM with the LabVIEW®
graphical programming language to access the capabilities of
Data Translation’s data acquisition boards.
•PCI Specification: PCI Local Bus Specification, PCI Special Interest
Group, Portland, OR. (Revision 2.1s).
•PLX PCI9030 Data Book: PLX Technology, Inc.
(www.plxtech.com).
•Microsoft Windows 98, Windows 2000, or Windows Me
documentation.
Where To Get Help
Should you run into problems installing or using a DT351 board, the
Technical Support Department is available to provide technical
assistance. Refer toChapter 5 for more information. If you are outside
the U.S. or Canada, call your local distributor, whose number is listed
in your Data Translation product handbook.

About this Manual
x

1
1
Overview
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Supported Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 1
2
Features
Ideal for the control of electrical devices and for monitoring digital
signals, the DT351 is an isolated digital I/O board that you can use to
control electrical devices and monitor digital signals. It provides the
following major features:
•Half-size board for the PCI bus.
•8 channel-to-channel opto-isolated digital input lines.
•8 channel-to-channel opto-isolated digital output lines.
•DC input signal sensing from 3.5 V to 32 V.
•Output loads of up to 100 mA.
•37-pin shielded I/O connector.
•250 VDC isolation between inputs and the outputs and between
the digital I/O lines and the system’s PCI bus.
•Over-current fuse protection.
•PCI interrupt-request generated on change of any of the eight
inputs.
For a discussion of these features in detail, refer to page 7.

Overview
3
1
1
1
1
1
1
1
1
1
Supported Software
The following software is available for use with the DT351 board:
•DT351 Device Driver −This software is shipped with the board.
You must install this device driver to use the DT351 board with
any of the following supported software packages or utilities.
Refer to the DT351 Getting Started Manual for more information
on installing this software.
•The Quick Data Acq application −This software is shipped on
the Data Acquisition OMNI CDTM. The Quick Data Acq
application provides a quick way to get a DT351 board up and
running. Using the Quick Data Acq application, you can verify
the features of the board and display data on the screen. Refer to
the DT351 Getting Started Manual (UM-19138) for information on
using the Quick Data Acq application.
•DataAcq SDK −This software is shipped on the Data Acquisition
OMNI CDTM. Use the Data Acq SDK if you want to use Windows
98, Windows 2000, or Windows Me to develop your own
application software for the DT351 board using the Microsoft C
compiler; the DataAcq SDK complies with the DT-Open Layers
standard.
•DTx-EZ −Order this optional software package if you want to
use the ActiveX controls provided in DTx-EZto access the
capabilities of the DT351 board using Microsoft Visual Basic or
Visual C++; DTx-EZ complies with the DT-Open Layersstandard.
•DT VPI −Order this optional software package if you want to
use the Agilent VEE visual programming language to access the
capabilities of the DT351 board.
•DT-LV Link −Order this optional software package if you want
to use the LabVIEW graphical programming language to access
the capabilities of the DT351 board.

Chapter 1
4
•Testpoint −An evaluation version and a run-time version of this
software are included on the Data Acquisition OMNI CD.
Testpoint is a drag-and-drop software environment for designing
test, measurement, and data acquisition applications. Refer to the
documentation on the CD-ROM for information on using the
Testpoint evaluation and run-time versions. Optionally, you can
order the professional development version of this software
package to develop your own application.
Refer to Data Translation’s catalog for information about selecting the
right software package for your needs.

Overview
5
1
1
1
1
1
1
1
1
1
Accessories
The following optional accessories are available for the DT351 board:
•STP37 screw terminal panel −The STP37 permits easy screw
terminal connections to the DT351 board. The STP37 screw
terminal panel contains LED indicators to monitor the digital
output lines.
•EP333 cable − The EP333 is a 2-meter shielded cable with two
37-pin connectors that connects the DT351 to the STP37.

Chapter 1
6

7
2
Principles of Operation
Digital I/O Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 2
8
This chapter describes the digital I/O features of the DT351 board. To
frame the discussions, refer to the block diagram shown in
Figure 1.
Figure 1: DT351 Block Diagram
37-Pin I/O Connector
Opto Coupler
Opto Coupler
Digital In
Register
Digital Out
Register
Latch
Mask
Register
Interrupt
Generator
PCI and Local Bus Interface
Interrupt
Address
Decode
and Control
Interrupt
Enable
PCI Bus

Principles of Operation
9
2
2
2
2
2
2
2
2
2
Digital I/O Lines
DT351 boards support eight dedicated digital input lines through the
digital input (DIN) subsystem and eight dedicated digital output
lines through the digital output (DOUT) subsystem.
Channel-to-channel isolation of 250 VDC is provided by physical
separation of the inputs and outputs and separate ground runs. In
addition, the digital I/O lines are isolated from the system’s PCI bus
by 250 VDC. Digital output line protection is provided by fast-acting
fuses on each line. Fuses open when the load exceeds 300 mA. Note
that these fuses reset themselves when needed.
You can specify the digital input line to read in a single-value digital
I/O or continuous operation. You can specify the digital output line
to write to in a single-value digital I/O operation. Refer topage 11 for
more information on digital I/O operation modes.
The resolution is fixed at 8, which means that you can read or write to
all the lines of the digital I/O port at once.
On power up or reset, no digital data is output from the board.
Notes: For digital input lines, a value of 0 indicates the input is low;
a value of 1 indicates that the input is high.
For digital outputs, the values are inverted. Therefore, a value of 0
indicates that the output is high; a value of 1 indicates that the
output is low.
If you write a digital output value, then read the value using a
digital input, you must wait approximately 1 ms to ensure accurate
data. This delay is due to the isolation circuitry.

Chapter 2
10
Interrupts
The DT351 board can generate a PCI-bus interrupt when any of the
digital input lines changes state. This feature is useful when you want
to monitor critical signals or when you want to signal the host
computer to transfer data to or from the board.You enable the
interrupts on a bit-by-bit basis during DT351 driver configuration.
Use software to determine which digital line changed state.
The DT351 board provides debouncing circuitry for the digital
inputs; this means that any state changes that result from noise
sources, slow rise or fall times, or switch bounce on the input source
are ignored for approximately 1 ms. Debouncing the inputs prevents
most situations where multiple interrupts can occur for one state
change. In some cases, though, particularly with digital signals that
are derived from mechanical switches, you may need to add more
debouncing in your application program; refer to the Knowledgebase
section of the Data Translation web site (www.datatranslation.com)
for information on adding debouncing code to your application
program.