Measurement Computing USB-1408FS-Plus-OEM Manuel utilisateur

USB-1408FS-Plus-OEM

Analog and Digital I/O

Document Revision 2A

January 2015

User's Guide

HM USB-1408FS-Plus-OEM

Trademark and Copyright Information

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

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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

Chapter 1

Introducing the USB-1408FS-Plus-OEM ............................................................................................. 6

Functional block diagram...................................................................................................................................6

Chapter 2

Installing the USB-1408FS-Plus-OEM ................................................................................................. 7

Unpacking...........................................................................................................................................................7

Downloading the software..................................................................................................................................7

Installing the hardware .......................................................................................................................................7

Installing on a Windows platform..................................................................................................................................... 7

Calibrating the hardware.....................................................................................................................................7

Chapter 3

Functional Details ................................................................................................................................. 8

Analog input acquisition modes .........................................................................................................................8

Software paced.................................................................................................................................................................. 8

Hardware paced ................................................................................................................................................................ 8

Board components..............................................................................................................................................9

USB connector.................................................................................................................................................................. 9

LED .................................................................................................................................................................................. 9

Header connectors............................................................................................................................................................. 9

Differential mode pinout..................................................................................................................................................10

Single-ended mode pinout ...............................................................................................................................................10

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

Analog input....................................................................................................................................................................11

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

Digital I/O........................................................................................................................................................................14

Counter input...................................................................................................................................................................15

External trigger input.......................................................................................................................................................15

SYNC I/O ........................................................................................................................................................................15

Power output....................................................................................................................................................................15

Ground.............................................................................................................................................................................15

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

Synchronized operations...................................................................................................................................17

Power................................................................................................................................................................18

Mechanical drawings........................................................................................................................................18

Chapter 4

Specifications ...................................................................................................................................... 19

Analog input .....................................................................................................................................................19

Accuracy..........................................................................................................................................................................20

Noise performance...........................................................................................................................................................20

Analog output ...................................................................................................................................................20

Digital input/output...........................................................................................................................................21

External trigger.................................................................................................................................................22

External clock input/output...............................................................................................................................22

Counter.............................................................................................................................................................23

USB-1408FS-Plus-OEM User's Guide

Memory ............................................................................................................................................................23

Microcontroller.................................................................................................................................................23

Power................................................................................................................................................................23

General .............................................................................................................................................................24

Environmental ..................................................................................................................................................24

Mechanical .......................................................................................................................................................24

Header connector..............................................................................................................................................24

Differential mode.............................................................................................................................................................25

Single-ended mode ..........................................................................................................................................................25

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide describes the Measurement Computing USB-1408FS-Plus-OEM data acquisition device and

lists device specifications.

Conventions in this user's guide

For more information

Text presented in a box signifies additional information and helpful hints related to the subject matter.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Where to find more information

Additional information about USB-1408FS-Plus-OEM hardware is available on our website at

www.mccdaq.com. You can also contact Measurement Computing Corporation with specific questions.

Knowledgebase: kb.mccdaq.com

Tech support form: www.mccdaq.com/support/support_form.aspx

Email: techsupport@mccdaq.com

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

For international customers, contact your local distributor. Refer to the International Distributors section on our

website at www.mccdaq.com/International.

Chapter 1

Introducing the USB-1408FS-Plus-OEM

The USB-1408FS-Plus-OEM is a USB 2.0 full-speed analog input and digital I/O data acquisition device that

provides the following features:

Eight analog input channels that are software-selectable for either eight 13-bit single-ended inputs or four

14-bit differential inputs

Two 12-bit analog output channels

16 digital I/O channels that are independently-selectable as input or output in two 8-bit ports

32-bit event counter input for counting TTL pulses

External digital trigger input

Bidirectional external clock for synchronous operation with more than one device.

Two header connectors for field wiring connections

The USB-1408FS-Plus-OEM device is compatible with both USB 1.1 and USB 2.0 ports. The speed of the

device may be limited when using a USB 1.1 port due to the difference in transfer rates on the USB 1.1 versions

of the protocol (low-speed and full-speed).

The device is powered by the +5 V USB supply from the computer. No external power is required.

Caution! There are no product safety, electromagnetic compatibility (EMC), or CE marking compliance

claims made for the USB-1408FS-Plus-OEM. The USB-1408FS-Plus-OEM is intended for use as

a component of a larger system. MCC can help developers meet their compliance requirements.

The end product supplier, however, is responsible for conforming to any and all compliance

requirements.

Functional block diagram

Device functions are illustrated in the block diagram shown here.

Figure 1. USB-1408FS-Plus-OEM functional block diagram

Chapter 2

Installing the USB-1408FS-Plus-OEM

Unpacking

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

electricity. Before removing the board 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.

Downloading the software

Refer to the USB-1408FS-Plus-OEM product page on the Measurement Computing website for information

about the supported software you can download.

Install the software before you install the hardware

The driver needed to run the device is installed when you install the software. Therefore, you need to install the

software package you plan to use before you install the hardware.

Installing the hardware

Installing on a Windows platform

Connect the USB-1408FS-Plus-OEM to a to an available USB port on the computer running Windows, connect

the USB cable to an available USB port on the computer or to an external USB hub connected to the computer.

Connect the other end of the cable to the USB connector on the device. No external power is required.

When connected for the first time, a Found New Hardware dialog opens when the operating system detects the

device. When the dialog closes, the installation is complete. The device LED turns on after the device is

successfully installed.

If the LED turns off

If communication is lost between the device and the computer, the LED turns off. To restore communication,

disconnect the USB cable from the computer and then reconnect it. This should restore communication, and the

LED should turn on.

Calibrating the hardware

The Measurement Computing Manufacturing Test department performs the initial factory calibration. Return

the device to Measurement Computing Corporation when calibration is required. The recommended calibration

interval is one year.

The USB-1408FS-Plus-OEM does not support field calibration.

Chapter 3

Functional Details

Analog input acquisition modes

The USB-1408FS-Plus-OEM can acquire analog input data in either software paced or hardware paced mode.

Software paced

The USB-1408FS-Plus-OEM acquires data one analog sample at a time using software paced mode. You

initiate the A/D conversion by calling a software command. The analog value is converted to digital and

returned to the computer. You can repeat this procedure until you have the total number of samples that you

want.

The maximum sample rate in software-paced mode is system-dependent.

Hardware paced

The USB-1408FS-Plus-OEM can acquire data from up to eight channels using hardware-paced mode. The

analog data is acquired and converted to digital values until you stop the scan. Data is transferred in blocks of

32 samples from the device to the memory buffer on your computer.

The A/D converter is paced by either an internal or external clock source.

The maximum sample rate is an aggregate rate. The total sample rate for all channels cannot exceed 50 kS/s.

The following table lists the sample rate when scanning from one to eight channels.

Maximum per channel sample rate

# channels

scanned

Sample rate

(kS/s)

1 48

2 24

3 16

4 12

5 9.60

6 8

7 6.85

8 6

You can start a hardware-paced scan with a software command. Optionally, hardware-paced scans can be

delayed by an external hardware trigger event.

USB-1408FS-Plus-OEM User's Guide Functional Details

Board components

The board components – header connectors, LED, and USB connector – are shown in Figure 2.

1 Header connector pins 21 to 40 3 USB connector

2 LED 4 Header connector pins 1 to 20

Figure 2. Board components

USB connector

Receives the supplied USB cable. When connected to a computer or USB hub, the cable provides power and

communication. No external power supply is required.

LED

The following table lists the behavior of the device LED.

LED state Indication

Steady green The device is connected to a computer or external USB hub.

Blinks continuously Data is being transferred.

Header connectors

The header connectors provide the following connections:

Eight analog input connections (CH0 IN to CH7 IN, CH0 IN HI/LO through CH3 IN HI/LO)

Two analog output connections (D/A OUT 0 to D/A OUT 1)

16 digital I/O connections (PortA0 to Port A7, and Port B0 to Port B7)

External trigger input (TRIG_IN)

External counter input (CTR)

Bidirectional terminal for external clocking or multi-unit synchronization (SYNC)

Power output (+VO)

Analog ground (AGND) and ground (GND)

The differential and single-ended mode pinouts are shown in the following tables.

USB-1408FS-Plus-OEM User's Guide Functional Details

Differential mode pinout

Four-channel differential mode pinout

Pin Signal name Pin description Pin Signal name Pin description

1 CH0 IN HI Analog input 0+ 21 Port A0 Port A bit 0

2 CH0 IN LO Analog input 0– 22 Port A1 Port A bit 1

3 AGND Analog ground 23 Port A2 Port A bit 2

4 CH1 IN HI Analog input 1+ 24 Port A3 Port A bit 3

5 CH1 IN LO Analog input 1– 25 Port A4 Port A bit 4

6 AGND Analog ground 26 Port A5 Port A bit 5

7 CH2 IN HI Analog input 2+ 27 Port A6 Port A bit 6

8 CH2 IN LO Analog input 2– 28 Port A7 Port A bit 7

9 AGND Analog ground 29 GND Ground

10 CH3 IN HI Analog input 3+ 30 +VO Power output

11 CH3 IN LO Analog input 3– 31 GND Ground

12 AGND Analog ground 32 Port B0 Port B bit 0

13 D/A OUT 0 Analog output 0 33 Port B1 Port B bit 1

14 D/A OUT 1 Analog output 1 34 Port B2 Port B bit 2

15 AGND Analog ground 35 Port B3 Port B bit 3

16 Reserved Reserved for future use 36 Port B4 Port B bit 4

17 GND Ground 37 Port B5 Port B bit 5

18 TRIG_IN Trigger input 38 Port B6 Port B bit 6

19 SYNC Synchronization I/O 39 Port B7 Port B bit 7

20 CTR Counter input 40 GND Ground

USB connector

Single-ended mode pinout

Eight-channel single-ended mode pinout

Pin Signal name Pin description Pin Signal name Pin description

1 CH0 IN Analog input 0 21 Port A0 Port A bit 0

2 CH1 IN Analog input 1 22 Port A1 Port A bit 1

3 AGND Analog ground 23 Port A2 Port A bit 2

4 CH2 IN Analog input 2 24 Port A3 Port A bit 3

5 CH3 IN Analog input 3 25 Port A4 Port A bit 4

6 AGND Analog ground 26 Port A5 Port A bit 5

7 CH4 IN Analog input 4 27 Port A6 Port A bit 6

8 CH5 IN Analog input 5 28 Port A7 Port A bit 7

9 AGND Analog ground 29 GND Ground

10 CH6 IN Analog input 6 30 +VO Power output

11 CH7 IN Analog input 7 31 GND Ground

12 AGND Analog ground 32 Port B0 Port B bit 0

13 D/A OUT 0 Analog output 0 33 Port B1 Port B bit 1

14 D/A OUT 1 Analog output 1 34 Port B2 Port B bit 2

15 AGND Analog ground 35 Port B3 Port B bit 3

16 Reserved Reserved for future use 36 Port B4 Port B bit 4

17 GND Ground 37 Port B5 Port B bit 5

18 TRIG_IN Trigger input 38 Port B6 Port B bit 6

19 SYNC Synchronization I/O 39 Port B7 Port B bit 7

20 CTR Counter input 40 GND Ground

USB connector

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