Measurement Computing USB-2404-60 Manuel utilisateur

USB-2404-60

USB-based Analog Input Device

User's Guide

Document Revision 2A, November, 2009

HM USB-2404-60.docx

Trademark and Copyright Information

Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are

either trademarks or registered trademarks of MeasurementComputing Corporation. Refer to the Copyrights &

Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.

Other product and company namesmentioned herein are trademarks or trade names of their respective

companies.

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.

Table of Contents

Preface

About this User's Guide ....................................................................................................................... 5

What you will learn from this user's guide .........................................................................................................5

Conventions in this user's guide .........................................................................................................................5

Where to find more information .........................................................................................................................5

Safety guidelines ................................................................................................................................................5

Chapter 1

Introducing the USB-2404-60 ............................................................................................................... 6

Overview: USB-2404-60 features ......................................................................................................................6

USB-2404-60 block diagram ..............................................................................................................................6

Software features ................................................................................................................................................7

Chapter 2

Installing the USB-2404-60 ................................................................................................................... 8

What comes with your USB-2404-60 shipment? ...............................................................................................8

Hardware .......................................................................................................................................................................... 8

Additional documentation ................................................................................................................................................. 8

Optional accessories ......................................................................................................................................................... 8

Unpacking the USB-2404-60 .............................................................................................................................8

Installing the software ......................................................................................................................................9

Installing the hardware .....................................................................................................................................9

Calibrating the USB-2404-60 ...........................................................................................................................9

Chapter 3

Functional Details ............................................................................................................................... 10

Components ......................................................................................................................................................10

Screw terminals (CH0 to CH3) ........................................................................................................................................10

USB connector .................................................................................................................................................................11

LED .................................................................................................................................................................................11

Strain relief slot for USB cable ........................................................................................................................................11

High-voltage applications .................................................................................................................................11

Signal source connections.................................................................................................................................11

Analog input circuitry .......................................................................................................................................12

Filtering ............................................................................................................................................................12

Passband bandwidth .........................................................................................................................................................12

Stopband bandwidth ........................................................................................................................................................13

Alias-free bandwidth ........................................................................................................................................................13

Sample rates ......................................................................................................................................................13

Chapter 4

Specifications ...................................................................................................................................... 14

Analog input .....................................................................................................................................................14

Accuracy ..........................................................................................................................................................................15

Power ................................................................................................................................................................15

Bus interface .....................................................................................................................................................15

Environmental ..................................................................................................................................................15

Mechanical .......................................................................................................................................................15

Safety voltages ..................................................................................................................................................16

Screw terminal connectors ................................................................................................................................16

Accessory products ...........................................................................................................................................16

Declaration of Conformity .................................................................................................................. 18

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-2404-60, and 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.

< : > 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

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.

Safety guidelines

You can connect hazardous voltages to the USB-2404-60 device's screw terminals. A hazardous voltage is a

voltage greater than 42.4 Vpk or 60 VDC to earth ground. Take the following precautions if you connect

hazardous voltages to the USB-2404-60:

Caution! Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local

electrical standards.

Caution! Do not mix hazardous voltage circuits and human-accessible circuits on the same device.

Caution! Make sure that devices and circuits connected to the USB-2404-60 are properly insulated from

human contact.

Caution! When device terminals are hazardous voltage LIVE (>42.4Vpk/60 VDC), ensure that devices and

circuits connected to the USB-2404-60 are properly insulated from human contact. Use the

ACC-160 connector backshell kit to ensure that the terminals are not accessible.

Chapter 1

Introducing the USB-2404-60

Overview: USB-2404-60 features

This user's guide contains all of the information you need to connect the USB-2404-60 to your computer and to

the signals you want to measure.

The USB-2404-60 is a USB 2.0 high-speed device that is supported under popular Microsoft® Windows®

operating systems. The USB-2404-60 is fully compatible with both USB 1.1 and USB 2.0 ports.

The USB-2404-60 provides four channels of 24-bit simultaneous analog inputs.

The maximum sampling rate is 50 kS/s per channel, and the input voltage range is ±60 V, nominal.

An anti-alias filter removes noise that may be present in the signals prior to conversion. A 250 Vrms channel-

to-channel and channel-to-ground isolation protects the device and computer from ground spikes, and ensures a

reliable data stream. An on-board LED indicates the status of the device.

Field connections are made to four 2-position detachable screw terminals. Ten additional two-position

connectors are available with the optional ACC-102 connector kit.

The USB 2.0 high-speed driver transfers data at rates up to 480 Mbps. The USB-2404-60 is powered by the

+5 volt USB supply from your computer. No external power is required.

USB-2404-60 block diagram

USB-2404-60 functions are illustrated in the block diagram shown here.

Figure 1. USB-2404-60 functional block diagram

USB

Microcontroller

USB

Hi-Speed

USB 2.0

Compliant

Interface

USB

CH0+

0-CH

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolation barrier

CH1+

1-CH

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolation barrier

CH2+

2-CH

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolation barrier

CH3+

3-CH

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

Isolated

ADC

Amplifier

Overvoltage

Protection

Prefilter

USB-2404-60 User's Guide Introducing the USB-2404-60

Software features

For information on the features of InstaCal and the other software included with your USB-2404-60, 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.

Chapter 2

Installing the USB-2404-60

What comes with your USB-2404-60 shipment?

As you unpack your USB-2404-60, verify that the following components are included.

Hardware

USB-2404-60

USB cable (2 meter length)

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/PDFmanuals/DAQ-Software-Quick-Start.pdf). This booklet supplies a brief description of

the software you received with your USB-2404-60 and information regarding installation of that software.

Please read this booklet completely before installing any software or hardware.

Optional accessories

ACC-102 — Two-position screw terminal connector blocks (quantity ten). Additional details are available

on our web site at www.mccdaq.com/daq-accessory/acc-102.aspx.

ACC-160 — Backshell for use with the ACC-102 two-position screw terminal connector blocks. Provides

strain relief and operator protection from high-voltage signals (quantity six). Additional details are

available on our web site at www.mccdaq.com/daq-accessory/acc-160.aspx.

Unpacking the USB-2404-60

As with any electronic device, you should take care while handling to avoid damage from static

electricity. Before removing the USB-2404-60 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 your USB-2404-60 is damaged, notify Measurement Computing Corporation immediately by phone, fax, or

e-mail.

Phone: 508-946-5100 and follow the instructions for reaching Tech Support.

Fax: 508-946-9500 to the attention of Tech Support

Email: [email protected]

For international customers, contact your local distributor where you purchased the USB-2404-60. Click on this

link www.measurementcomputing.com/sales.asp to locate your distributor.

USB-2404-60 User's Guide Installing the USB-2404-60

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/PDFmanuals/DAQ-Software-

Quick-Start.pdf.

Installing the hardware

Install the MCC DAQ software before you install your board

The driver needed to run your board is installed with the MCC DAQ software. Therefore, you need to install the

MCC DAQ software before you install your board. Refer to the Quick Start Guide for instructions on installing

the software.

Be sure you are using the latest system software

Before you install your USB-2404-60, run Windows Update to update your operating system with the latest

USB drivers.

To connect the USB-2404-60 to your system, turn your computer on, and connect the USB cable to a USB port

on your computer or to an external USB hub that is connected to your computer. The USB cable provides power

and communication to the USB-2404-60.

When you connect the USB-2404-60 for the first time, a series of Found New Hardware popup balloons

(Windows XP) or dialogs (other Windows versions) open as the USB-2404-60 is detected by your computer.

When the last balloon or dialog closes, the installation is complete. The LED on the USB-2404-60 blinks

steadily to indicate that the device is initialized and receiving power.

Caution! Do not disconnect any device from the USB bus while the computer is communicating with the

USB-2404-60, or you may lose data and/or your ability to communicate with the device.

Allow the USB-2404-60 to operate for at least 30 minutes before using the device. This warm up time is

required to achieve the specified rated accuracy of measurements.

Calibrating the USB-2404-60

The USB-2404-60 is shipped fully calibrated. Calibration coefficients are stored in EEPROM. Return the device

to Measurement Computing Corporation when calibration is required. The normal calibration interval is once

per year.

Chapter 3

Functional Details

Components

The USB-2404-60 has the following external components:

Screw terminal connectors

USB port

LED

Strain relief slot for USB cable

Figure 2. Front panel (Screw terminal connections)

Figure 3. Rear panel (USB connection and LED)

Screw terminals (CH0 to CH3)

The USB-2404-60 has four 2-terminal detachable screw terminals for connection to four isolated analog inputs.

The maximum sampling rate is 50 kS/s per channel, and the input voltage range is ±60 V, nominal. The

channels may be sampled individually or simultaneously. Signal assignments are listed in the following table.

Screw terminal pin assignments

Screw terminal

Signal

CH0+ (CH0 IN HI)

CH0–(CH0 IN LO)

CH1+ (CH1 IN HI)

CH1–(CH1 IN LO)

CH2+ (CH2 IN HI)

CH2–(CH2 IN LO)

CH3+ (CH3 IN HI)

CH3–(CH3 IN LO)

Use 16 AWG to 28 AWG wires to connect signals to the device.

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