Measurement USB-500 User Manual
USB-3102
USB-based Analog Output
User's Guide
Document Revision 4, March, 2009
© Copyright 2009, Measurement Computing Corporation
HM USB-3102.doc
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Table of Contents
Preface
About this User's Guide ....................................................................................................................... 7
What you will learn from this user's guide ......................................................................................................... 7
Conventions in this user's guide ........................................................................................................................................ 7
Where to find more information ......................................................................................................................... 7
Chapter 1
Introducing the USB-3102 .................................................................................................................... 8
Overview: USB-3102 features ............................................................................................................................ 8
USB-3102 block diagram ................................................................................................................................... 9
Software features ................................................................................................................................................ 9
Chapter 2
Installing the USB-3102 ...................................................................................................................... 10
What comes with your USB-3102 shipment? ................................................................................................... 10
Hardware .........................................................................................................................................................................10
Additional documentation ................................................................................................................................................10
Unpacking the USB-3102 ................................................................................................................................. 10
Installing the software ...................................................................................................................................... 11
Installing the hardware ..................................................................................................................................... 11
Connecting the USB-3102 to your system .......................................................................................................................11
Calibrating the USB-3102 ................................................................................................................................ 12
Chapter 3
Functional Details ............................................................................................................................... 13
External components ........................................................................................................................................ 13
USB connector .................................................................................................................................................................13
Status LED .......................................................................................................................................................................13
Power LED ......................................................................................................................................................................13
Screw terminal banks .......................................................................................................................................................14
Analog voltage output terminals (VOUT0 to VOUT3) ....................................................................................................15
Analog current output terminals (IOUT0 to IOUT3) .......................................................................................................15
Current Test terminal (ITEST) .........................................................................................................................................16
Digital I/O terminals (DIO0 to DIO7)..............................................................................................................................17
Digital I/O control terminal (DIO CTL) for pull-up/down configuration ........................................................................17
Ground terminals (AGND, DGND) .................................................................................................................................17
Synchronous DAC load terminal (SYNCLD) ..................................................................................................................18
Counter terminal (CTR) ...................................................................................................................................................18
Power terminal (+5V) ......................................................................................................................................................18
Synchronizing multiple units ............................................................................................................................ 18
Chapter 4
Specifications ...................................................................................................................................... 20
Analog voltage output ...................................................................................................................................... 20
Analog current output ....................................................................................................................................... 21
Analog output calibration ................................................................................................................................. 22
Digital input/output........................................................................................................................................... 22
Synchronous DAC Load ................................................................................................................................... 23
Counter ............................................................................................................................................................. 23
Memory ............................................................................................................................................................ 23
Microcontroller ................................................................................................................................................. 24
Power ................................................................................................................................................................ 24
USB specifications ........................................................................................................................................... 24
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USB-3102 User's Guide
Environmental .................................................................................................................................................. 25
Mechanical ....................................................................................................................................................... 25
Main connector and pin out .............................................................................................................................. 25
Declaration of Conformity .................................................................................................................. 26
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About this User's Guide
What you will learn from this user's guide
This user's guide explains how to install, configure, and use the USB-3102 so that you get the most out of its
analog output features.
This user's guide also refers you to related documents available on our web site, and to technical support
resources.
Conventions in this user's guide
For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
Preface
< : > Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned
to registers, bit settings, etc.
bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For
example:
1. Insert the disk or CD and click the OK button.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For
example:
The InstaCal® installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board
Where to find more information
The following electronic documents provide helpful information relevant to the operation of the USB-3102.
MCC's Specifications: USB-3102 (the PDF version of the Specifications chapter in this guide) is available
on our web site at www.mccdaq.com/pdfs/Specs/USB-3102-spec.pdf.
MCC's Quick Start Guide is available on our web site at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
MCC's Guide to Signal Connections is available on our web site at
www.mccdaq.com/signals/signals.pdf.
MCC's Universal Library User's Guide is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf.
MCC's Universal Library Function Reference is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-functions.pdf.
MCC's Universal Library for LabVIEW™ User’s Guide is available on our web site at
www.mccdaq.com/PDFmanuals/SM-UL-LabVIEW.pdf.
USB-3102 User's Guide (this document) is also available on our web site at
www.mccdaq.com/PDFmanuals/USB-3102.pdf.
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Chapter 1
Introducing the USB-3102
Overview: USB-3102 features
This user's guide contains all of the information you need to connect the USB-3102 to your computer and to the
signals you want to control. The USB-3102 is part of the Measurement Computing brand of USB-based data
acquisition products.
The USB-3102 is a USB 2.0 full-speed device that is supported under popular Microsoft® Windows® operating
systems. The USB-3102 is fully compatible with both USB 1.1 and USB 2.0 ports.
The USB-3102 provides four channels of analog voltage output, four channels of analog current output, eight
digital I/O connections, and one 32-bit event counter.
The USB-3102 has a quad (4-channel) 16-bit digital-to-analog converter (DAC). Each D/A converter output
controls a voltage and current channel pair simultaneously.
You set the voltage output range of each DAC channel independently with software for either bipolar, unipolar
or current. The bipolar range is ±10 V, the unipolar range is 0 to 10 V, and the analog current range is 0 to
20 mA. Each voltage/current channel pair can be updated individually or simultaneously. A bidirectional
synchronization connection allows you to simultaneously update the DAC outputs on multiple devices.
The USB-3102 features eight bidirectional digital I/O connections. You can configure the DIO lines as input or
output in one 8-bit port. All digital pins are floating by default. A screw terminal connection is provided for
pull-up (+5 V) or pull-down (0 volts) configuration.
The 32-bit counter can count TTL pulses.
The USB-3102 is powered by the +5 volt USB supply from your computer. No external power is required. All
I/O connections are made to the screw terminals located along each side of the USB-3102.
Figure 1. USB-3102
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USB-3102 User's Guide Introducing the USB-3102
USB
Screw terminal I/O connector
SPI
USB
Microcontroller
Screw terminal I/O connector
8
SYNCLD
4
4
Event Counter
1 channel
(32-bit)
1
D/A
Analog Voltage
Output
4 channels (16-bit)
DIO
8 channels
Analog Current
Output
4 channels (16-bit)
4-channel
Quad
4
Full-speed
USB 2.0
Compliant
Interface
USB-3102 block diagram
USB-3102 functions are illustrated in the block diagram shown here.
Software features
For information on the features of InstaCal and the other software included with your USB-3102, refer to the
Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
Check www.mccdaq.com/download.htm for the latest software version.
Figure 2. USB-3102 block diagram
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