Measurement Computing USB-1208LS Manual de usuario

USB-1208LS

USB-based

Analog and Digital I/O Module

User's Guide

Document Revision 2, May, 2006

Your new Measurement Computing product comes with a fantastic extra —

Management committed to your satisfaction!

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Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now enjoy

the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our two

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!To offer the highest-quality, computer-based data acquisition, control, and GPIB hardware and software available—at

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support on our latest product offerings, or continuing that same first-rate support on older products and operating

systems, we’re committed to you!

Lifetime warranty: Every hardware product manufactured by Measurement Computing Corporation is warranted against

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Lifetime Harsh Environment Warranty®: We will replace any product manufactured by Measurement Computing

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with an order for its replacement at only 50% of the current list price. We don’t need to profit from your misfortune. By the way,

we honor this warranty for any manufacturer’s board that we have a replacement for.

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Measurement Computing Corporation, nor its employees shall be liable for any direct or indirect, special, incidental or

consequential damage arising from the use of its products, even if Measurement Computing Corporation has been notified in

advance of the possibility of such damages.

HM USB-1208LS.doc

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TracerDAQ, Universal Library, InstaCal, Harsh Environment Warranty, Measurement Computing Corporation, and the

Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation.

Windows, Microsoft, and Visual Studio are either trademarks or registered trademarks of Microsoft Corporation

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means, electronic, mechanical, by photocopying, recording, or otherwise without the prior written permission of Measurement

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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 which, 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.

iii

Table of Contents

Preface

About this User's Guide ......................................................................................................................vi

What you will learn from this user's guide ........................................................................................................vi

Conventions in this user's guide ........................................................................................................................vi

Where to find more information ........................................................................................................................vi

Chapter 1

Introducing the USB-1208LS............................................................................................................ 1-1

USB-1208LS block diagram........................................................................................................................... 1-2

Software features ............................................................................................................................................ 1-2

Connecting a USB-1208LS to your computer is easy .................................................................................... 1-3

Chapter 2

Installing the USB-1208LS................................................................................................................ 2-1

What comes with your USB-1208LS shipment? ............................................................................................ 2-1

Hardware ....................................................................................................................................................................... 2-1

Additional documentation.............................................................................................................................................. 2-1

Unpacking the USB-1208LS .......................................................................................................................... 2-1

Installing the software .................................................................................................................................... 2-2

Installing the hardware ................................................................................................................................... 2-2

Chapter 3

Functional Details ............................................................................................................................. 3-1

Theory of operation - analog input acquisition modes ................................................................................... 3-1

Software paced mode..................................................................................................................................................... 3-1

Continuous scan mode ................................................................................................................................................... 3-1

Burst scan mode............................................................................................................................................................. 3-1

External components ...................................................................................................................................... 3-2

USB connector............................................................................................................................................................... 3-2

LED ............................................................................................................................................................................... 3-2

Screw terminal wiring.................................................................................................................................................... 3-3

Main connector and pin out ........................................................................................................................................... 3-3

Analog input terminals (CH0 IN - CH7 IN)................................................................................................................... 3-4

Digital I/O terminals (Port A0 to A7, and Port B0 to B7).............................................................................................. 3-7

Power terminals ............................................................................................................................................................. 3-8

Ground terminals ........................................................................................................................................................... 3-8

Calibration terminal ....................................................................................................................................................... 3-9

Trigger terminal ............................................................................................................................................................. 3-9

Counter terminal ............................................................................................................................................................ 3-9

Accuracy......................................................................................................................................................... 3-9

USB-1208LS channel gain queue feature..................................................................................................... 3-12

Chapter 4

Specifications.................................................................................................................................... 4-1

Analog output ................................................................................................................................................. 4-2

Digital input/output......................................................................................................................................... 4-3

External trigger............................................................................................................................................... 4-3

Counter ........................................................................................................................................................... 4-3

Non-volatile memory...................................................................................................................................... 4-3

Power.............................................................................................................................................................. 4-4

General ........................................................................................................................................................... 4-4

Environmental ................................................................................................................................................ 4-4

USB-1208LS User's Guide

Mechanical ..................................................................................................................................................... 4-4

Main connector and pin out ............................................................................................................................ 4-4

4-channel differential mode ........................................................................................................................................... 4-5

8-channel single-ended mode......................................................................................................................................... 4-5

Preface

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-1208LS so that you get the most out of its

USB data acquisition features.

This user's guide also refers you to related documents available on our web site, and to technical support

resources that can also help you get the most out of the USB-1208LS.

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.

<#:#> 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-1208LS

!MCC's Specifications: USB-1208LS (the PDF version of the Electrical Specification Chapter in this guide)

is available on our web site at www.mccdaq.com/pdfs/USB-1208LS.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-1208LS User's Guide (this document) is also available on our web site at

www.mccdaq.com/PDFmanuals/USB-1208LS.pdf.

Chapter 1

Introducing the USB-1208LS

This user's guide contains all of the information you need to connect the USB-1208LS to your computer and to

the signals you want to measure.

The USB-1208LS is a USB 1.1 low-speed device supported under popular Microsoft®Windows®operating

systems. It is designed for USB 1.1 ports, and was tested for full compatibility with both USB 1.1 and USB 2.0

ports.

The USB-1208LS features eight analog inputs, two 10-bit analog outputs, 16 digital I/O connections, and one

32-bit external event counter. The USB-1208LS is powered by the +5 volt USB supply from your computer. No

external power is required.

The USB-1208LS analog inputs are software configurable for either eight 11-bit single-ended inputs, or four

12-bit differential inputs. An on-board industry standard 82C55 programmable peripheral interface chip

provides the 16 digital I/O lines in two 8-bit ports. You can configure each digital port independently for either

input or output.

The USB-1208LS is shown in Figure 1-1. I/O connections are made to the screw terminals located along each

side of the USB-1208LS.

Figure 1-1. USB-1208LS

1-1

USB-1208LS User's Guide Introducing the USB-1208LS

USB-1208LS block diagram

USB-1208LS functions are illustrated in the block diagram shown here.

Screw terminal I/O connector

USB

Microcontroller

USB1.1

Compliant

Interface

Analog Input

8 SE (

4 Diff. (

11-bit ) channels

12-bit ) channels

32-bit

Event Counter

1 channel

8 8

Port

82C55 DIO

Analog Output

10-bit

2 channels

Figure 1-2. USB-1208LS Functional block diagram

Software features

For information on the features of InstaCal and the other software included with your USB-1208LS, 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 or versions of the software supported

under less commonly used operating systems.

1-2

USB-1208LS User's Guide Introducing the USB-1208LS

Connecting a USB-1208LS to your computer is easy

Installing a data acquisition device has never been easier.

!The USB-1208LS relies upon the Microsoft Human Interface Device (HID) class drivers. The HID class

drivers ship with every copy of Windows that is designed to work with USB ports. We use the Microsoft

HID because it is a standard, and its performance delivers full control and maximizes data transfer rates for

your USB-1208LS. No third-party device driver is required.

!The USB-1208LS is plug-and-play. There are no jumpers to position, DIP switches to set, or interrupts to

configure.

!You can connect the USB-1208LS before or after you install the software, and without powering down

your computer first. When you connect an HID to your system, your computer automatically detects it and

configures the necessary software. You can connect and power multiple HID peripherals to your system

using a USB hub.

!You can connect your system to various devices using a standard four-wire cable. The USB connector

replaces the serial and parallel port connectors with one standardized plug and port combination.

!You do not need a separate power supply module. The USB automatically delivers the electrical power

required by each peripheral connected to your system.

!Data can flow two ways between a computer and peripheral over USB connections.

1-3

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Measurement Computing PCI-DAS64/M1/16 Manual de usuario

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Measurement Computing USB-1608FS-Plus-OEM Manual de usuario

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Measurement Computing USB-2404-60 Manual de usuario

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Measurement Computing USB-3102 Manual de usuario

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Measurement Computing USB-1608FS Manual de usuario

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Measurement Computing USB-1208HS-4AO Manual de usuario

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