Measurement USB-4301 User Manual

USB-3101

USB-based Analog Output

User Guide

Document Revision 3, March, 2009

© Copyright 2009, Measurement Computing Corporation

HM USB-3101.doc

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3

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4

Table of Contents

Preface

About this User's Guide ....................................................................................................................... 7

What you will learn from this user's guide ......................................................................................................... 7

Conventions in this user's guide ........................................................................................................................................ 7

Where to find more information ......................................................................................................................... 7

Chapter 1

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

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

USB-3101 block diagram ................................................................................................................................... 9

Software features ................................................................................................................................................ 9

Chapter 2

Installing the USB-3101 ...................................................................................................................... 10

What comes with your USB-3101 shipment? .................................................................................................. 10

Hardware .........................................................................................................................................................................10

Additional documentation ................................................................................................ ................................................10

Unpacking the USB-3101................................................................................................................................. 10

Installing the software ...................................................................................................................................... 11

Installing the hardware ..................................................................................................................................... 11

Connecting the USB-3101 to your system .......................................................................................................................11

Calibrating the USB-3101 ................................................................................................................................ 12

Chapter 3

Functional Details ............................................................................................................................... 13

External components ........................................................................................................................................ 13

USB connector .................................................................................................................................................................13

Status LED .......................................................................................................................................................................13

Power LED ......................................................................................................................................................................13

Screw terminal banks .......................................................................................................................................................14

Analog voltage output terminals (VOUT0 to VOUT3) ...................................................................................................15

Digital I/O terminals (DIO0 to DIO7) .............................................................................................................................15

Digital I/O control terminal (DIO CTL) for pull-up/down configuration ........................................................................16

Ground terminals (AGND, DGND) .................................................................................................................................16

Synchronous DAC load terminal (SYNCLD) ..................................................................................................................16

Counter terminal (CTR) ...................................................................................................................................................16

Power terminal (+5V) ......................................................................................................................................................16

Synchronizing multiple units ............................................................................................................................ 17

Chapter 4

Specifications ...................................................................................................................................... 18

Analog voltage output ...................................................................................................................................... 18

Analog output calibration ................................................................................................................................. 19

Digital input/output .......................................................................................................................................... 19

Synchronous DAC Load................................................................................................................................... 20

Counter ............................................................................................................................................................. 20

Memory ............................................................................................................................................................ 21

Microcontroller ................................................................................................................................................. 21

Power ................................................................................................................................ ................................ 21

USB specifications ........................................................................................................................................... 21

Environmental .................................................................................................................................................. 21

5

USB-3101 User's Guide

Mechanical ....................................................................................................................................................... 22

Main connector and pin out .............................................................................................................................. 22

Declaration of Conformity .................................................................................................................. 23

6

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-3101 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.

Preface

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

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

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

7

Chapter 1

Introducing the USB-3101

Overview: USB-3101 features

This user's guide contains all of the information you need to connect the USB-3101 to your computer and to the
signals you want to control. The USB-3101 is part of the Measurement Computing brand of USB-based data
acquisition products.

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

The USB-3101 provides four channels of analog voltage output, eight digital I/O connections, and one 32-bit
event counter.

The USB-3101 has a quad (4-channel) 16-bit digital-to-analog converter (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 analog outputs may be updated individually or simultaneously.
A bidirectional synchronization connection allows you to simultaneously update the DAC outputs on multiple
devices.

The USB-3101 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.

The USB-3101 is powered by the +5 volt USB supply from your computer. No external power is required. All
I/O connections are made to the screw terminals located along each side of the USB-3101.

Figure 1. USB-3101

8

USB-3101 User's Guide Introducing the USB-3101

Screw terminal I/O connector

USB

Microcontroller

Screw terminal I/O connector

8

Event Counter

1 channel

(32-bit)

DIO

8 channels

SPI

4

USB

Full-speed

USB 2.0

Compliant

Interface

Screw terminal I/O connector

SYNCLD

1

D/A

4

Analog Voltage

Output

4 channels (16-bit)

4

4-channel

Quad

1

USB-3101 block diagram

USB-3101 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-3101, 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 2. USB-3101 block diagram

9

Installing the USB-3101

What comes with your USB-3101 shipment?

The following items are shipped with the USB-3101.

Hardware

 USB-3101 device

Chapter 2

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

Unpacking the USB-3101

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-3101 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.

10

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

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: [e-mail]

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

Be sure you are using the latest system software

Before you connect the USB-3101, make sure that you are using the latest versions of the USB drivers.
Before installing the USB-3101, 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 1.1 and 2.0 update." This article is available at

support.microsoft.com/?kbid=822603.

Connecting the USB-3101 to your system

To connect the USB-3101 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-3101.

When you connect the USB-3101 for the first time, a Found New Hardware popup balloon (Windows XP) or
dialog (other Windows versions) appears as the USB-3101 is detected by your computer.

After the USB-3101 is installed, the popup balloon or dialog states "Your new hardware is installed and ready
to use," and the power LED should flash and then remain lit. This indicates that communication is established
between the USB-3101 and your computer.

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

USB-3101, or you may lose data and/or your ability to communicate with the USB-3101.

11

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

If the power LED turns off

If the power LED is illuminated but then turns off, the computer has lost communication with the USB-3101.
To restore communication, disconnect the USB cable from the computer, and then reconnect it. This should
restore communication, and the power LED should turn back on.

Calibrating the USB-3101

The USB-3101 is shipped fully calibrated. Calibration coefficients are stored in the device FLASH memory.
Return the device to Measurement Computing Corporation when calibration is required. The normal calibration
interval is once per year.

12

USB
connector

Power LED

Status LED

Screw terminal

pins 1 to 28

Screw terminal

pins 29 to 56

Functional Details

External components

The USB-3101 has the following external components, as shown in Figure 3.

 USB connector
 Status LED
 Power LED
 Screw terminal banks (2)

Chapter 3

Figure 3. USB-3101 external components

USB connector

The USB connector provides power and communication to the USB-3101. The voltage supplied through the
USB connector is system-dependent, and may be less than 5 V. No external power supply is required.

Status LED

The Status LED indicates the communication status of the USB-3101. It flashes when data is being transferred,
and is off when the USB-3101 is not communicating. This LED uses up to 10 mA of current and cannot be
disabled.

Power LED

The power LED lights up when the USB-3101 is connected to a USB port on your computer or to an external
USB hub that is connected to your computer.

13

USB-3101 User's Guide Functional Details

Pin 56Pin 29

Pin 28Pin 1

Screw terminal banks

The USB-3101 has two rows of screw terminals—one row on the top edge of the housing, and one row on the
bottom edge. Each row has 28 connections. Use 16 AWG to 30 AWG wire gauge when making screw terminal
connections. Pin numbers are identified in Figure 4.

Figure 4. USB-3101 screw terminal pin numbering

Screw terminal – pins 1-28

The screw terminals on the bottom edge of the USB-3101 (pins 1 to 28) provide the following connections:

 Two analog voltage output connections (VOUT0, VOUT2)
 Four analog ground connections (AGND)
 Eight digital I/O connections (DIO0 to DIO7)

Screw terminal – pins 29-56

The screw terminals on the top edge of the USB-3101 (pins 29 to 56) provide the following connections:

 Two analog voltage output connections (VOUT1, VOUT3)
 Four analog ground connections (AGND)
 One SYNC terminal for external clocking and multi-unit synchronization (SYNCLD)
 Three digital ground connections (DGND)
 One external event counter connection (CTR)
 One digital I/O pull-down resistor connection (DIO CTL)
 One voltage output power connection (+5 V)

14

USB-3101 User's Guide Functional Details

29 VOUT1

30 NC

31 VOUT3

32 NC

33 AGND

34 NC

35 NC

36 NC

37 NC

38 AGND

39 NC

40 NC

41 NC

42 NC

43 AGND

44 NC

45 NC

46 NC

47 NC

50 DGND

51 NC

52 CTR

53 DGND

54 DIO CTL

55 DGND

56 +5V

48 AGND

49 SYNCLD

VOUT0 1

NC 2

VOUT2 3

NC 4

AGND 5

NC 6

NC 7

NC 8

NC 9

AGND 10

NC 11

NC 12

NC 13

NC 14

AGND 15

NC 16

NC 17

NC 18

NC 19

AGND 20

DIO0 21

DIO1 22

DIO2 23

DIO3 24

DIO4 25

DIO5 26

DIO6 27

DIO7 28

Pin 53
DGND

Pin 56
+5V

Pin 28
DIO7

Figure 6. DIO7 detecting the state of a switch

+5V

DGND

DIO7

Figure 7. Schematic showing DIO7 detecting the state of

a switch

Figure 5. USB-3101 signal pin out

Analog voltage output terminals (VOUT0 to VOUT3)

The screw terminal pins labeled VOUT0 to VOUT3 are voltage output terminals (see Figure 5). The voltage
output range for each channel is software-programmable for either bipolar or unipolar. The bipolar range is
±10 V, and the unipolar range is 0 to 10 V. The channel outputs may be updated individually or simultaneously.

Digital I/O terminals (DIO0 to DIO7)

You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7 (pins 21 through 28).
You can configure each digital bit for either input or output.

When you configure the digital bits for input, you can use the digital I/O terminals to detect the state of any
TTL-level input. Refer to the switch shown in Figure 6 and the schematic shown in Figure 8. When the switch
is set to the +5 V USER input, DIO7 reads TRUE (1). If you move the switch to DGND, DIO7 reads FALSE
(0).

15

USB-3101 User's Guide Functional Details

For more information on digital signal connections

For more information on digital signal connections and digital I/O techniques, refer to the Guide to Signal
Connections (available on our web site at www.mccdaq.com/signals/signals.pdf).

Digital I/O control terminal (DIO CTL) for pull-up/down configuration

All digital pins are floating by default. When inputs are floating, the state of unwired inputs are undefined (they
may read high or low). You can configure the inputs to read a high or low value when they aren’t wired. Use
the DIO CTL connection (pin 54) to configure the digital pins for pull-up (inputs read high when unwired) or
pull-down (inputs read low when unwired).

 To pull up the digital pins to +5V, wire the DIO CTL terminal pin to the +5V terminal pin (pin 56).
 To pull down the digital pins to ground (0 volts), wire the DIO CTL terminal pin to a DGND terminal pin

(pin 50, 53, or 55).

Ground terminals (AGND, DGND)

Eight analog ground (AGND) connections provide a common ground for all analog voltage output channels.
Three digital ground (DGND) connections provide a common ground for the DIO, CTR, SYNCLD and +5V
connections.

Synchronous DAC load terminal (SYNCLD)

The synchronous DAC load connection (pin 49) is a bidirectional I/O signal that allows you to simultaneously
update the DAC outputs on multiple devices. You can use this pin for two purposes:

 Configure as an input (slave mode) to receive the D/A LOAD signal from an external source.

When the SYNCLD pin receives the trigger signal, the analog outputs are updated simultaneously.

SYNCLD pin must be logic low in slave mode for immediate update of DAC outputs

When the SYNCLD pin is in slave mode, the analog outputs can be updated immediately or when a positive
edge is seen on the SYNCLD pin (this is under software control.)

The SYNCLD pin must be at a low logic level for DAC outputs to update immediately. If the external source
supplying the D/A LOAD signal is pulling the SYNCLD pin high, no update will occur.

Refer to the "USB-3100 Series" section in the Universal Library User's Guide for information on how to
update DAC outputs immediately.

 Configure as an output (master mode) to send the internal D/A LOAD signal to the SYNCLD pin.

You can use the SYNCLD pin to synchronize with a second USB-3101 and simultaneously update the
DAC outputs on each device. Refer to Synchronizing multiple units section on page 17.

Use InstaCal to configure the SYNCLD mode as master or slave. On power up and reset the SYNCLD pin is
set to slave mode (input).

Refer to the "USB-3100 Series" section in the Universal Library User's Guide for information on how to
configure the USB-3101 with the Universal Library.

Counter terminal (CTR)

The CTR connection (pin 52) is the input to the 32-bit event counter. The internal counter increments when the
TTL levels transition from low to high. The counter can count frequencies of up to 1 MHz.

Power terminal (+5V)

The +5 V connection (pin 56) draws power from the USB connector. This terminal is a +5V output.

16

USB-3101 User's Guide Functional Details

S

Slave

PMD-1608F

Master

device

Slave

device

SYNCLD pin

(terminal pin 49)

D/A LOAD signal

Configure the SYNCLD

pin for output

Configure the SYNCLD

pin for input

Caution! The +5V terminal is an output. Do not connect to an external power supply or you may damage

the USB-3101 and possibly the computer.

Synchronizing multiple units

You can connect the SYNCLD terminal pin (pin 49) of two USB-3101 units together in a master/slave
configuration and simultaneously update the DAC outputs of both devices. Do the following.

1. Connect the SYNCLD pin of the master USB-3101 to the SYNCLD pin of the slave USB-3101.

2. Configure the SYNCLD pin on the slave device for input to receive the D/A LOAD signal from the master

device. Use InstaCal to set the direction of the SYNCLD pin.

3. Configure the SYNCLD pin on the master device for output to generate an output pulse on the SYNCLD

pin.

Set the Universal Library SIMULTANEOUS option for each device. Refer to the Universal Library User's Guide
for information on how to configure the USB-3101 with the Universal Library.

When the SYNCLD pin on the slave device receives the signal, the analog output channels on each device are
updated simultaneously.

An example of a master/slave configuration is shown here.

Figure 8. Synchronizing the update of multiple devices

17

Parameter

Conditions

Specifications

Digital to Analog converter

DAC8554

Number of channels

4 Resolution

16 bits

Output ranges

Calibrated

±10 V, 0 to 10 V
Software configurable

Un-calibrated

±10.2 V, -0.04 to 10.08 V
Software configurable

Output transient

±10 V to (0 to 10 V) or
(0 to 10 V) to ±10 V range

selection.
(Note 1)

Duration: 5 µS typ.
Amplitude: 5V p-p typ.

Host PC is reset, powered on,
suspended or a reset command is
issued to device.

(Note 2)

Duration: 2 S typ.
Amplitude: 2V p-p typ.

Initial power on

Duration: 50 mS typ.
Amplitude: 5V peak typ.

Differential non-linearity
(Note 3)
Calibrated

±1.25 LSB typ.

-2 LSB to +1 LSB max.

Un-calibrated

±0.25 LSB typ.
±1 LSB max.

Output current

VOUTx pins

±3.5 mA typ.

Output short-circuit protection

VOUTx connected to AGND

Indefinite

Output coupling

DC

Power on and reset state
DACs cleared to zero-scale: 0 V, ±50 mV typ.

Output range: 0-10V

Output noise
0 to 10 V range

14.95 µVrms typ.

±10 V range

31.67 µVrms typ.

Settling time

to 1 LSB accuracy

25 µS typ.

Slew rate
0 to 10 V range

1.20 V/µS typ.

±10 V range

1.20 V/µS typ.

Throughput
Single-channel

100 Hz max., system dependent

Multi-channel

100 Hz/#ch max., system dependent

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Analog voltage output

Table 1. Analog voltage output specifications

Chapter 4

Note 1: The USB-3101 output voltage level defaults to 0V whenever the output voltage range is

reconfigured.
The USB-3101 output voltage level will also default to 0V:

1) Whenever the host PC is reset, shut down or suspended.

2) If a reset command is issued to the device.

18

USB-3101 User's Guide Specifications

Range

Accuracy (±LSB)

±10 V

14.0

0 to 10 V

22.0

Range

% of reading

Offset (±mV)

Temp drift (%/°C)

Absolute accuracy at FS (±mV)

±10 V

±0.0183

1.831

0.00055

3.661

0 to 10 V

±0.0183

0.915

0.00055

2.746

Range

Relative accuracy (±LSB)

±10 V , 0 to 10 V

4.0 typ.

12.0 max.

Parameter

Conditions

Specifications

Recommended warm-up time

15 minutes min.

On-board precision reference

DC level: 5.000 V ±1 mV max.

Tempco: ±10 ppm/°C max.

Long term stability: ±10 ppm/SQRT(1000 hrs)

Calibration method

Software calibration

Calibration interval

1 year

Digital logic type

CMOS

Number of I/O

8

Configuration

Independently configured for input or output

Pull-up/pull-down configuration
(Note 4)

User configurable
All pins floating (default)

Digital I/O input loading
TTL (default)

47K ohms (pull-up/pull down configurations)

Digital I/O transfer rate (system paced)

System dependent, 33 to 1000 port reads/writes or single bit reads/writes per
second.

Input high voltage

2.0 V min, 5.5 V absolute max

Input low voltage

0.8 V max, –0.5 V absolute min

Output high voltage (IOH = –2.5 mA)

3.8 V min

Output low voltage (IOL = 2.5 mA)

0.7 V max

Power on and reset state

Input

Note 2: The duration of this particular output transient is highly dependent on the enumeration process of

the host PC. Typically the output of the USB-3101 is stable after 2 seconds

Note 3: The maximum differential non-linearity specification applies to the entire 0 to 70 °C temperature

range of the USB-3101. This specification also accounts for the maximum errors due to the
software calibration algorithm (in Calibrated mode only) and the DAC8554 digital to analog
converter non-linearities.

Table 2. Absolute accuracy specifications – calibrated output

Table 3. Absolute accuracy components specifications – calibrated output

Table 4. Relative accuracy specifications

Analog output calibration

Table 5. Analog output calibration specifications

Digital input/output

Table 6. Digital I/O specifications

19

USB-3101 User's Guide Specifications

Parameter

Conditions

Specification

Pin name

SYNCLD (terminal block pin 49)

Power on and reset state

Input

Pin type

Bidirectional

Termination

Internal 100K ohms pull-down

Software selectable direction
Output

Outputs internal D/A LOAD signal.

Input

Receives D/A LOAD signal from external source.

Input clock rate

100 Hz max

Clock pulse width
Input

1 µs min

Output

5 µs min

Input leakage current

±1.0 µA typ.

Input high voltage

4.0 V min, 5.5 V absolute max

Input low voltage

1.0 V max, –0.5 V absolute min

Output high voltage (Note 5)
IOH = –2.5 mA

3.3 V min

No load

3.8 V min

Output low voltage (Note 6)
IOL = 2.5 mA

1.1 V max

No load

0.6 V max

Parameter

Conditions

Specification

Pin name

CTR

Number of channels

1 Resolution

32-bits

Counter type

Event counter

Input type

TTL, rising edge triggered

Counter read/writes rates
(software paced)

Counter read

System dependent, 33 to 1000 reads per second.

Counter write

System dependent, 33 to 1000 reads per second.

Schmidt trigger hysteresis

20 mV to 100 mV

Input leakage current

±1.0 µA typ.

Input frequency

1 MHz max.

High pulse width

500 nS min.

Low pulse width

500 ns min.

Input high voltage

4.0 V min, 5.5 V absolute max

Input low voltage

1.0 V max, –0.5 V absolute min

Note 4: Pull up and pull down configuration area available using the DIO CTL terminal block pin 54.

The pull down configuration requires the DIO CTL pin (pin 54) to be connected to a DGND pin
(pin 50, 53 or 55). For a pull up configuration, the DIO CTL pin should be connected to the +5V
terminal pin (pin 56).

Synchronous DAC Load

Table 7. SYNCLD I/O specifications

Note 5: SYNCLD is a Schmitt trigger input and is over-current protected with a 200 Ohm series resistor.
Note 6: When SYNCLD is in input mode, the analog outputs may either be updated immediately or when

Counter

a positive edge is seen on the SYNCLD pin (this is under software control.) However, the pin
must be at a low logic level in order for the DAC outputs to be updated immediately. If an
external source is pulling the pin high, no update will occur.

Table 8. CTR I/O specifications

20

USB-3101 User's Guide Specifications

EEPROM

256 bytes

EEPROM configuration
Address range

Access

Description

0x000-0x0FF

Read/write

256 bytes user data

Type

High performance 8-bit RISC microcontroller

Program memory

16,384 words

Data memory

2,048 bytes

Parameter

Conditions

Specification

Supply current

USB enumeration

< 100 mA

Supply current (Note 7)

Quiescent current

140 mA typ.

+5V user output voltage range (Note 8)

Available at terminal block pin 56

4.5 V min, 5.25 V max.

+5V user output current (Note 9)

Available at terminal block pin 56

10 mA max.

USB device type

USB 2.0 (full-speed)

USB device compatibility

USB 1.1, 2.0

USB cable length

3 meters max.

USB cable type

A-B cable, UL type AWM 2527 or equivalent (min 24 AWG VBUS/GND,
min 28 AWG D+/D-).

Operating temperature range

0 to 70 °C

Storage temperature range

-40 to 85 °C

Humidity

0 to 90% non-condensing

Memory

Table 9. Memory specifications

Microcontroller

Table 10. Microcontroller specifications

Power

Table 11. Power specifications

Note 7: This is the total quiescent current requirement for the USB-3101 which includes up to 10 mA for

the status LED. This does not include any potential loading of the digital I/O bits, +5V user
terminal, or the VOUTx outputs.

Note 8: Output voltage range assumes USB power supply is within specified limits.
Note 9: This refers to the total amount of current that can be sourced from the +5V user terminal (pin 56)

for general use. This specification also includes any additional contribution due to DIO loading.

USB specifications

Environmental

Table 12. USB specifications

Table 13. Environmental specifications

21

USB-3101 User's Guide Specifications

Dimensions

127 mm (L) x 88.9 mm (W) x 35.56 (H)

Connector type

Screw terminal

Wire gauge range

16 AWG to 30 AWG

Pin

Signal Name

Pin

Signal Name

1

VOUT0

29

VOUT1

2

NC

30

NC 3 VOUT2

31

VOUT3

4

NC

32

NC 5 AGND

33

AGND

6

NC

34

NC 7 NC

35

NC 8 NC

36

NC 9 NC

37

NC

10

AGND

38

AGND

11

NC

39

NC

12

NC

40

NC

13

NC

41

NC

14

NC

42

NC

15

AGND

43

AGND

16

NC

44

NC

17

NC

45

NC

18

NC

46

NC

19

NC

47

NC

20

AGND

48

AGND

21

DIO0

49

SYNCLD

22

DIO1

50

DGND

23

DIO2

51

NC

24

DIO3

52

CTR

25

DIO4

53

DGND

26

DIO5

54

DIO CTL

27

DIO6

55

DGND

28

DIO7

56

+5V

Mechanical

Table 14. Mechanical specifications

Main connector and pin out

Table 15. Main connector specifications

22

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-3101

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: Electromagnetic Compatibility, EN 61326-1:2006, (IEC 61326-1:2005)

Emissions:

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

Immunity: EN61326-1:2006, (IEC 61326-1:2005) Table 3 Immunity requirements for equipment used in
controlled EM environments.

 IEC 61000-4-2 (2001): Electrostatic Discharge immunity.
 IEC 61000-4-3 (2002): Radiated Electromagnetic Field immunity.

To maintain the safety, emission, and immunity standards of this declaration, the following conditions must be
met.

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

compliant.

 Equipment must be operated in a controlled electromagnetic environment as defined by Standards EN

61326-1:2006, or IEC 61326-1:2005.

 Shielded wires must be used for all I/Os and must be less than 3 meters (9.75 feet) in length.
 The host computer must be properly grounded.
 The host computer must be USB2.0 compliant.
 A protective ESD wrist strap should be used when connecting or disconnecting leads from screw

terminal blocks.

Note: Data acquisition equipment may exhibit noise or increased offsets when exposed to high RF fields
(>1V/m) or transients.

Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
January, 2007. Test records are outlined in Chomerics Test Report #EMI4712.07. Further testing was
conducted by Chomerics Test Services, Woburn, MA. 01801, USA in November, 2008. Test records are
outlined in Chomerics Test report #EMI5193.08.

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