Measurement USB-4302 User Manual

USB-3101FS

Analog Voltage Output

User's Guide

Document Revision 1, November, 2008

© Copyright 2008, Measurement Computing Corporation

HM USB-3101FS.docx

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Simple installations minimize the time between setting up your system and actually making measurements. We offer quick and
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3

Trademark and Copyright Information

TracerDAQ, Universal Library, 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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Information furnished by Measurement Computing Corporation is believed to be accurate and reliable. However, no

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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 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.

4

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

Safety guidelines ................................................................................................................................................ 7

Chapter 1

Introducing the USB-3101FS................................................................................................................ 8

Overview: USB-3101FS features ....................................................................................................................... 8

USB-3101FS block diagram .............................................................................................................................. 8

Software features ................................................................................................................................................ 8

Chapter 2

Installing the USB-3101FS .................................................................................................................... 9

What comes with your USB-3101FS shipment? ................................................................................................ 9

Hardware .......................................................................................................................................................................... 9

Additional documentation ................................................................................................................................................. 9

Optional accessories ......................................................................................................................................................... 9

Unpacking the USB-3101FS .............................................................................................................................. 9

Installing the software ...................................................................................................................................... 10

Installing the hardware ..................................................................................................................................... 10

Calibrating the USB-3101FS ............................................................................................................................ 10

Chapter 3

Functional Details ............................................................................................................................... 11

Components ...................................................................................................................................................... 11

Screw terminals................................................................................................................................................................11

Analog outputs (AO 0 to AO 3) .......................................................................................................................................12

USB connector ................................................................................................................................ .................................12

LED .................................................................................................................................................................................12

Strain relief slot for USB cable ........................................................................................................................................12

High-voltage applications ................................................................................................................................. 12

Connecting a load ............................................................................................................................................. 12

Analog output circuitry ..................................................................................................................................... 13

Chapter 4

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

Analog output ................................................................................................................................................... 14

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

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

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

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

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

Mechanical ....................................................................................................................................................... 16

Screw terminal connector ................................................................................................................................. 16

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

Declaration of Conformity .................................................................................................................. 17

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-3101FS 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.

< : > 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-3101FS.
 MCC's Specifications: USB-3101FS (the PDF version of the Specifications chapter in this guide) is

available on our web site at www.mccdaq.com/pdfs/USB-3101FS.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-3101FS User's Guide (this document) is also available on our web site at

www.mccdaq.com/PDFmanuals/USB-3101FS.pdf.

6

USB-3101FS User's Guide

Safety guidelines

You can connect hazardous voltages to the USB-3101FS 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-3101FS:

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-3101FS 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-3101FS are properly insulated from human contact. Use the
ACC-107 backshell with 10-position connector block to ensure that the terminals are not
accessible.

7

USB

Microcontroller

USB

Hi-Speed

USB 2.0

Compliant

Interface

USB

AO 0
COM

D/A0

Amplifier

Overvoltage

Short-circuit

Protection

Isolation barrier

Isolated

DAC

AO 1
COM

D/A1

Amplifier

Overvoltage

Short-circuit

Protection

Isolated

DAC

AO 2
COM

D/A2

Amplifier

Overvoltage

Short-circuit

Protection

Isolated

DAC

AO 3
COM

D/A3

Amplifier

Overvoltage

Short-circuit

Protection

Isolated

DAC

Chapter 1

Introducing the USB-3101FS

Overview: USB-3101FS features

This user's guide contains all of the information you need to connect the USB-3101FS to your computer and to
the signals you want to control.

The USB-3101FS is a USB 2.0 full-speed device that is supported under popular Microsoft® Windows®
operating systems. The USB-3101FS is fully compatible with both USB 1.1 and USB 2.0 ports.

The USB-3101FS is a 16-bit, 4-channel, 100 kS/s analog output device. The output range is ±10 V.
All signal connections are made to detachable screw terminals. The USB-3101FS is powered by the +5 volt

USB supply from your computer. No external power is required.

USB-3101FS block diagram

USB-3101FS 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-3101FS, 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 1. USB-3101FS functional block diagram

8

Installing the USB-3101FS

What comes with your USB-3101FS shipment?

The following items are shipped with the USB-3101FS.

Hardware

 USB-3101FS

 USB cable (2 meter length)

Chapter 2

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-3101FS and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.

Optional accessories

 ACC-107 — backshell with 10-position connector block (quantity 1). Additional details are available on

our web site at www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=586&pf_id=1871.

 ACC-121 — 10-position detachable screw terminal connector block (quantity 10). Additional details are

available on our web site at www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=586&pf_id=1872.

Unpacking the USB-3101FS

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-3101FS 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-3101FS is damaged, notify Measurement Computing Corporation immediately by phone, fax, or e­mail.

 Phone: [phone] and follow the instructions for reaching Tech Support.
 Fax: [phone] to the attention of Tech Support
 Email: [e-mail]

For international customers, contact your local distributor where you purchased the USB-3101FS. Click on this
link www.measurementcomputing.com/sales.asp to locate your distributor.

9

USB-3101FS User's Guide Installing the USB-3101FS

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-3101FS, run Windows Update to update your operating system with the latest
USB drivers.

To connect the USB-3101FS 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-3101FS.

When you connect the USB-3101FS for the first time, a series of Found New Hardware popup balloons
(Windows XP) or dialogs (other Windows versions) open as the USB-3101FS is detected by your computer.
When the last balloon or dialog closes, the installation is complete. The LED on the USB-3101FS 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-3101FS, or you may lose data and/or your ability to communicate with the USB-3101FS.

Allow the USB-3101FS 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-3101FS

The USB-3101FS 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.

10

Terminal

Signal

0

AO 0

1

Common (COM)

2

AO 1

3

Common (COM)

4

AO 2

5

Common (COM)

6

AO 3

7

Common (COM)

8

NC (No connection)

9

Common (COM)

Functional Details

Components

The USB-3101FS has the following external components:

 Screw terminal connectors
 USB port
 LED
 Strain relief slot for USB cable

Figure 2. Front panel (Screw terminal connections)

Chapter 3

Figure 3. Rear panel (USB connection and LED)

Screw terminals

The USB-3101FS has a ten-position detachable screw terminal block that provide connections for four analog
output channels. Signal assignments are listed in the following table.

Screw terminal pin assignments

Connect the positive lead of a voltage signal to the A0 terminals. Use 12 AWG to 24 AWG wires to connect the
signals. Common terminals (COM) are internally connected to the isolated ground reference of the device.

11

USB-3101FS User's Guide Functional Details

LED State

Device status

Not lit

The device is not connected to a USB port or hub.

Continuous single-blink

The device is operating normally.

Continuous double-blink

The device is connected to a USB 1.1 Full-Speed port or hub, which may affect
performance.

Optimum performance requires connections to a USB 2.0 Hi-Speed host controller
(480 Mbps) and USB 2.0 high-speed hubs.

Analog outputs (AO 0 to AO 3)

The voltage output range for each channel is set at ±10 V. The channel outputs may be updated individually or
simultaneously.

USB connector

The USB connector provides +5 V power and communication. The voltage supplied through the USB connector
is system-dependent, and may be less than 5 V. No external power supply is required.

LED

The LED indicates the device status. It uses up to 5 mA of current and cannot be disabled. Refer to the
following table for the possible LED states.

LED States

Strain relief slot for USB cable

Use the strain relief slot to keep the USB cable from disconnecting from the device inadvertently. Feed a tie
wrap through the slot and secure to the USB cable when it is connected to the device.

High-voltage applications

For high voltage applications, we recommend using the ACC-107 backshell with ten-position connector block
to ensure that the terminals are not accessible. The backshell also provides strain relief to protect the screw
terminals.

Figure 4. ACC-107 backshell with ten-position connector block

Additional details on this product are available on our web site at

www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=586&pf_id=1871.

Connecting a load

Connect the positive lead of the load to the AO terminal, and the ground of the load to the COM terminal.

Figure 5. Connecting a load to the device

12

USB-3101FS User's Guide Functional Details

Analog output circuitry

The USB-3101FS channels share a common ground that is isolated from the system. Each channel has a digital­to-analog converter (DAC) that produces a voltage signal.

Each channel also has ±30 V overvoltage and indefinite short-circuit protection.

Figure 6. Analog output circuitry for one channel

13

Parameter

Conditions

Specification

Number of channels

4

D/A converter resolution

16-bit

D/A converter type

String

Output range

±10 V

Operating voltage

±10.7 V, nominal
±10.3 V, minimum
±11 V, maximum

Current drive

±1 mA per channel, maximum

Output impedance

0.1 Ω

Stability
Offset drift

±80 µV/ºC

Gain drift

6 ppm/ ºC

Protection
Overvoltage

±30 V

Short-circuit

Indefinitely

Update time

One channel

3 µs

Two channels

5 µs

Three channels

7.5 µs

Four channels

9.5 µs

Update rate

100 kS/s per channel, maximum

Noise

260 µV

rms

Slew rate

4 V/µs

Crosstalk

76 dB

Settling time

100 pF load, to 1 LSB

FS step:

20 µs

3 V step:

10 µs

0.1 V step:

8 µs

Glitch energy

256 steps, worst case

2 mV for 2 µs

Capacitive drive

1,500 pF, minimum

Monotonicity

16-bits

Differential non-linearity

–1 to 2 LSBs, maximum

Integral non-linearity (endpoint)

16 LSBs, maximum

Specifications

All specifications are subject to change without notice.
Typical for the range –40 to 70 °C unless otherwise noted.
All voltages are relative to COM unless otherwise noted.

Analog output

Table 1. Analog output specifications

Chapter 4

14

USB-3101FS User's Guide Specifications

Measurement conditions

Percent of reading

Percent of range (Note 1)

Calibrated, maximum (–40 to 70 ºC)

0.35%

0.75%

Calibrated, typical (25 ºC, ±5 ºC)

0.01%

0.1%

Uncalibrated, maximum (–40 to 70 ºC)

2.2%

1.7%

Uncalibrated, typical (25 ºC, ±5 ºC)

0.3%

0.25%

Parameter

Specification

Power on voltage

0 V

Power consumption

625 mW, maximum

Thermal dissipation at 70 ºC

625 mW, maximum

Parameter

Specification

USB specification

USB 2.0 Hi-Speed mode (480 Mbps) is recommended.
Otherwise, USB 1.1 Full-Speed mode (12 Mbps).

Parameter

Specification

Operating temperature range

–40 to 70 °C

Storage temperature range

–40 to 85 °C

Ingress protection

IP 40

Operating humidity

10 to 90% relative humidity, non-condensing

Storage humidity

5 to 95% relative humidity, non-condensing

Maximum altitude

2000 meters (6561.679 feet)

Pollution degree (IEC60664)

2

Accuracy

Table 2. Analog input accuracy

Note 1: The range is equal to ±10.7 V.

Power

Table 3. Power specifications

Bus interface

Environmental

Table 4. General specifications

Table 5. Environmental specifications

15

USB-3101FS User's Guide Specifications

Parameter

Conditions

Specification

Channel-to-COM

±11 V maximum

Isolation

Channel-to-channel

No isolation between channels

Channel-to-earth ground
Continuous

250 V

rms

, Measurement Category II (Note 2)

Withstand

2,300 V

rms

, verified by a 5 second dielectric withstand test

Parameter

Specification

Dimensions

4.5" L x 5.5" W x 1.5" H

Weight

1.2 lbs. (544 grams)

Connector type

Screw terminal

Screw terminal wiring

12 to 24 AWG copper conductor wire with 10 mm (0.39 in.) of insulation stripped
from the end.

Torque for screw terminals

0.5 to 0.6 N · m (4.4 to 5.3 lb. · in.)

Terminal

Signal

0

AO 0

1

Common (COM)

2

AO 1

3

Common (COM)

4

AO 2

5

Common (COM)

6

AO 3

7

Common (COM)

8

NC (No connection)

9

Common (COM)

ACC-121

10-position detachable screw terminal connector blocks (quantity 10)

ACC-107

Backshell with 10-position connector block (quantity 1)

Safety voltages

Table 6. Safety voltage specifications

Note 2: Measurement Category II is for measurements performed on circuits directly connected to the

electrical distribution system. This category refers to local-level electrical distribution, such as
that provided by a standard wall outlet, for example 115 V for U.S. or 230 V for Europe.

Caution! Do not connect the device to signals or use for measurements within Measurement Categories

III or IV.

Mechanical

Table 7. Mechanical specifications

Screw terminal connector

Table 8. Screw terminal connector specifications

Accessory products

Table 9. Screw terminal connector specifications

Connector pin out

16

Declaration of Conformity

Manufacturer: Measurement Computing Corporation
Address: 10 Commerce Way
Suite 1008
Norton, MA 02766
USA
Measurement Computing Corporation declares under sole responsibility that the product

USB-3101FS

to which this declaration relates is in conformity with the relevant provisions of the following standards or other
documents:

Category: Electrical equipment for measurement, control and laboratory use.
EC EMC Directive 2004/108/EC: General Requirements, EN 61326-1:2006 (IEC 61326-1:2005).
Emissions: IEC 61326-2-1:2005.

 EN 55011 (1990)/CISPR 11 Radiated emissions: Group 1, Class A
 EN 55011 (1990)/CISPR 11 Conducted emissions: Group 1, Class A

Immunity: EN 61326-1:2006, Table 3.

 IEC 61000-4-2 (1995): Electrostatic Discharge immunity, Criteria B.
 IEC 61000-4-3 (1995): Radiated Electromagnetic Field immunity, Criteria A.

To maintain compliance to the standards of this declaration, the following conditions must be met.

 The host computer, peripheral equipment, power sources, and expansion hardware must be CE

compliant.

 All I/O cables must be shielded, with the shields connected to ground.
 I/O cables must be less than 3 meters (9.75 feet) in length.
 The host computer must be properly grounded.
 Equipment must be operated in a controlled electromagnetic environment as defined by Standards EN

61326:2006, or IEC 61326:2005.

Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
September, 2008. Test records are outlined in Chomerics Test Report #EMI5135.08.

We hereby declare that the equipment specified conforms to the above Directives and Standards.

Carl Haapaoja, Director of Quality Assurance

Measurement Computing Corporation

10 Commerce Way

Suite 1008

Norton, Massachusetts 02766

[phone]

Fax: [phone]

E-mail: [e-mail]

www.mccdaq.com