Measurement Computing USB-3114 User manual

USB-3114
USB-based Analog Output
User Guide
Document Revision 4A, January, 2011
© Copyright 2011, Measurement Computing Corporation

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HM USB-3114.doc
Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are
either trademarks or registered trademarks of Measurement Computing Corporation. Refer to the Copyrights &
Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective
companies.
© 2011 Measurement Computing Corporation. 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 Measurement Computing
Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, a) are intended for surgical implantation
into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result in
injury. Measurement Computing Corporation products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of
people.

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Table of Contents
Preface
About this User's Guide.......................................................................................................................6
What you will learn from this user's guide.........................................................................................................6
Conventions in this user's guide .........................................................................................................................6
Where to find more information.........................................................................................................................6
Chapter 1
Introducing the USB-3114....................................................................................................................7
Overview: USB-3114 features ...........................................................................................................................7
USB-3114 block diagram...................................................................................................................................8
Software features................................................................................................................................................8
Chapter 2
Installing the USB-3114........................................................................................................................9
What comes with your USB-3114 shipment? ....................................................................................................9
Hardware .......................................................................................................................................................................... 9
Additional documentation................................................................................................................................................10
Unpacking the USB-3114.................................................................................................................................10
Installing the software ......................................................................................................................................10
Installing the hardware .....................................................................................................................................10
Connecting the AC power adapter...................................................................................................................................10
Connecting the USB-3114 to your system.......................................................................................................................11
Calibrating the USB-3114................................................................................................................................11
Chapter 3
Functional Details...............................................................................................................................12
External components ........................................................................................................................................12
USB connector.................................................................................................................................................................12
USB LED.........................................................................................................................................................................12
Power connector ..............................................................................................................................................................12
Power LED ......................................................................................................................................................................13
Screw terminal banks.......................................................................................................................................................13
Analog voltage output terminals (VOUT0 to VOUT15) .................................................................................................14
Digital I/O terminals (DIO0 to DIO7) .............................................................................................................................14
Digital I/O control terminal (DIO CTL) for pull-up/down configuration........................................................................15
Ground terminals (AGND, DGND).................................................................................................................................15
Synchronous DAC load terminal (SYNCLD)..................................................................................................................15
Counter terminal (CTR)...................................................................................................................................................15
Power terminal (+5V)......................................................................................................................................................15
Synchronizing multiple units............................................................................................................................16
Mechanical drawings........................................................................................................................................17
Chapter 4
Specifications......................................................................................................................................18
Analog voltage output ......................................................................................................................................18
Analog output calibration.................................................................................................................................19
Digital input/output ..........................................................................................................................................20
Synchronous DAC Load...................................................................................................................................20
Counter.............................................................................................................................................................21
Memory ............................................................................................................................................................21
Microcontroller.................................................................................................................................................21
Power................................................................................................................................................................21

USB-3114 User's Guide
USB specifications ...........................................................................................................................................22
Environmental ..................................................................................................................................................22
Mechanical .......................................................................................................................................................22
Main connector and pin out..............................................................................................................................23
Declaration of Conformity..................................................................................................................24

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Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing USB-3114 data acquisition device and lists the
specifications.
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.
bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
Where to find more information
For additional information relevant to the operation of your hardware, refer to the Documents subdirectory
where you installed the MCC DAQ software (C:\Program Files\Measurement Computing\DAQ by default), or
search for your device on our website at www.mccdaq.com.

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Chapter 1
Introducing the USB-3114
Overview: USB-3114 features
This user's guide contains all of the information you need to connect the USB-3114 to your computer and to the
signals you want to measure. The USB-3114 is part of the Measurement Computing brand of USB-based data
acquisition products.
The USB-3114 is a USB 2.0 full-speed, high-drive device that is supported under popular Microsoft®
Windows®operating systems. The USB-3114 is fully compatible with both USB 1.1 and USB 2.0 ports.
The USB-3114 provides 16 channels of high-drive analog voltage output, high output current, eight digital I/O
connections, and one 32-bit event counter.
Each of the voltage outputs of the USB-3114 incorporates high-drive current output capability. The high drive
current outputs allow each of the voltage outputs to sink/source up to 40 mA (maximum) of load current.
Caution! The USB-3114 voltage outputs should not be kept in a short-circuit condition for longer than the
specified 100 ms. For those applications that may potentially exceed the 40 mA maximum current
limit or the 100 ms short-circuit condition, external current limiting must be used to prevent
potential damage to the USB-3114.
The USB-3114 has four quad (4-channel) 16-bit digital-to-analog converters (DAC). You set the voltage output
range of each DAC channel independently with software for either bipolar or unipolar. The bipolar range is
±10 V, and the unipolar range is 0 to 10 V. The outputs may be updated individually or simultaneously.
The USB-3114 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. A bidirectional synchronization connection allows you to
simultaneously update the DAC outputs on multiple devices.
The USB-3114 is powered by a 5 volt, 2 amp AC power adapter that is shipped with the board. All I/O
connections are made to the screw terminals located along each side of the USB-3114.
Figure 1. USB-3114

USB-3114 User's Guide Introducing the USB-3114
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USB-3114 block diagram
USB-3114 functions are illustrated in the block diagram shown here.
Figure 2. USB-3114 block diagram
Software features
For information on the features of InstaCal and the other software included with your USB-3114, refer to the
Quick Start Guide that shipped with your device.

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Chapter 2
Installing the USB-3114
What comes with your USB-3114 shipment?
The following items are shipped with the USB-3114.
Hardware
USB-3114 device
USB cable (2 meter length)
External power supply and cord –10 watt AC power adapter. MCC part number PS-5V2AEPS.

USB-3114 User's Guide Installing the USB-3114
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Additional documentation
In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at
www.mccdaq.com/PDFs/manuals/DAQ-Software-Quick-Start.pdf. This booklet supplies a brief description
of the software you received with your USB-3114 and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.
Unpacking the USB-3114
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-3114 from its packaging, ground yourself using a wrist strap or by simply
touching the computer chassis or other grounded object to eliminate any stored static charge.
If any components are missing or damaged, notify Measurement Computing Corporation immediately by
phone, fax, or e-mail:
Phone: [phone] and follow the instructions for reaching Tech Support.
Fax: [phone] to the attention of Tech Support
Email: [email protected]
Installing the software
Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing Data
Acquisition Software CD. This booklet is available in PDF at www.mccdaq.com/PDFs/manuals/DAQ-
Software-Quick-Start.pdf.
Installing the hardware
Be sure you are using the latest system software
Before you connect the USB-3114, make sure that you are using the latest versions of the USB drivers.
Before installing the USB-3114, download and install the latest Microsoft Windows updates. In particular,
when using Windows XP, make sure you have XP Hotfix KB822603 installed. This update is intended to
address a serious error in Usbport.sys when you operate a USB device. You can run Windows Update or
download the update from www.microsoft.com/downloads/details.aspx?familyid=733dd867-56a0-4956-b7fe-
e85b688b7f86&displaylang=en. For more information, refer to the Microsoft Knowledge Base article
"Availability of the Windows XP SP1 USB 1.1and 2.0update." This article is available at
support.microsoft.com/?kbid=822603.
Connecting the AC power adapter
Power to the USB-3114 is provided with the 10 watt USB adapter (PS-5V2AEPS). To connect the power
supply to your USB-3114, connect the USB adapter cord to the power connector on the USB-3114 device, and
plug the AC adapter into a power outlet.
The power LED on the device lights up when the USB-3114 is receiving power from the AC power adapter.