Measurement Computing USB-2404-60 User manual

USB-2404-60
USB-based Analog Input Device
User's Guide
Document Revision 2A, November, 2009
© Copyright 2009, Measurement Computing Corporation

3
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.
©2009 MeasurementComputingCorporation. All rights reserved. No part of this publicationmay 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 ....................................................................................................................... 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

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-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.

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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
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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.

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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: [phone] and follow the instructions for reaching Tech Support.
Fax: [phone] 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
9
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.

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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
0
CH0+ (CH0 IN HI)
1
CH0–(CH0 IN LO)
0
CH1+ (CH1 IN HI)
1
CH1–(CH1 IN LO)
0
CH2+ (CH2 IN HI)
1
CH2–(CH2 IN LO)
0
CH3+ (CH3 IN HI)
1
CH3–(CH3 IN LO)
Use 16 AWG to 28 AWG wires to connect signals to the device.