Measurement Computing USB-1608FS-Plus-OEM Manuel utilisateur

USB-1608FS-Plus-OEM

Analog and Digital I/O

Document Revision 2A

December 2014

User's Guide

HM USB-1608FS-Plus-OEM

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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-1608FS-Plus-OEM .............................................................................................6

Functional block diagram...................................................................................................................................7

Chapter 2

Installing a USB-1608FS-Plus-OEM.....................................................................................................8

Unpacking...........................................................................................................................................................8

Downloading the software..................................................................................................................................8

Installing the hardware .......................................................................................................................................8

Installing on a Windows platform..................................................................................................................................... 8

Installing on an Android platform..................................................................................................................................... 8

Calibrating the hardware.....................................................................................................................................8

Chapter 3

Functional Details .................................................................................................................................9

Analog input modes............................................................................................................................................9

Software paced.................................................................................................................................................................. 9

Hardware paced ................................................................................................................................................................ 9

BURSTIO......................................................................................................................................................................... 9

Board components............................................................................................................................................10

USB connector.................................................................................................................................................................10

LED .................................................................................................................................................................................10

Header connectors............................................................................................................................................................11

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

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

Channel-Gain queue ........................................................................................................................................................11

Digital I/O........................................................................................................................................................................12

Pull-up/down configuration .............................................................................................................................................12

Counter input...................................................................................................................................................................13

SYNC I/O ........................................................................................................................................................................13

Trigger input....................................................................................................................................................................13

Reserved ..........................................................................................................................................................................13

Ground.............................................................................................................................................................................13

Power output....................................................................................................................................................................13

Accuracy...........................................................................................................................................................14

Synchronized operations...................................................................................................................................16

Mechanical drawings........................................................................................................................................16

Chapter 4

Specifications......................................................................................................................................17

Analog input .....................................................................................................................................................17

Accuracy...........................................................................................................................................................17

Analog input DC voltage measurement accuracy............................................................................................................17

Noise performance...........................................................................................................................................................18

Digital input/output...........................................................................................................................................18

External trigger.................................................................................................................................................19

External clock input/output...............................................................................................................................19

Counter section.................................................................................................................................................20

USB-1608FS-Plus-OEM User's Guide

Memory ............................................................................................................................................................20

Microcontroller.................................................................................................................................................20

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

General .............................................................................................................................................................21

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

Mechanical .......................................................................................................................................................21

Header connector and pinout............................................................................................................................21

Preface

About this User's Guide

What you will learn from this user's guide

This user's guide describes the Measurement Computing USB-1608FS-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 you are

reading.

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 the USB-1608FS-Plus-OEM 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

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

website at

the instructions for reaching Tech Support

www.mccdaq.com/International.

Chapter 1

Introducing the USB-1608FS-Plus-OEM

The USB-1608FS-Plus-OEM is a USB 2.0 full-speed analog input and digital I/O data acquisition device

providing the following features:

Eight 16-bit single-ended (SE) analog input channels

Each input channel has a dedicated A/D converter for simultaneous sampling.

Software-selectable analog input ranges of ±10 V, ±5 V, ±2 V, and ±1 V

Eight individually configurable digital I/O channels

One 32-bit event counter

One external digital trigger input

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

Two header connectors for field wiring connections

The USB-1608FS-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 +5V USB supply from the computer, requiring no external power.

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

claims made for the USB-1608FS-Plus-OEM. The USB-1608FS-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.

USB-1608FS-Plus-OEM User's Guide Introducing the USB-1608FS-Plus-OEM

Functional block diagram

USB-1608FS-Plus-OEM functions are illustrated in the block diagram shown here.

Figure 1. Functional block diagram

Chapter 2

Installing a USB-1608FS-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-1608FS-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-1608FS-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.

Installing on an Android platform

Many Android devices include a standard A-type USB port to connect to the USB-1608FS-Plus-OEM. If your

device does not have a USB port, you may need a USB OTG cable in order for your Android device to host a

USB device. Refer to your Android device documentation for more information.

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.

Field calibration is not supported.

Chapter 3

Functional Details

Analog input modes

The USB-1608FS-Plus-OEM can acquire analog input data in three modes – software paced, hardware paced,

and BURSTIO.

Software paced

You can acquire one analog sample at a time in software-paced mode. You initiate the A/D conversion by

calling a software command. The analog value is converted to digital data and returned to the computer. You

can repeat this procedure until you have the total number of samples that you want.

The USB-1608FS-Plus-OEM can attain throughput rates up to 500 S/s using a software loop. This rate is

system-dependent.

Hardware paced

The USB-1608FS-Plus-OEM can acquire data from up to eight channels simultaneously in hardware-paced

mode. The analog data is acquired, converted to digital values, and written to an onboard FIFO buffer on the

device until you stop the scan. Data is transferred in blocks 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 sampling rate is an aggregate rate. The total sample rate using hardware-paced mode is 400 kS/s

divided by the number of channels, with a maximum rate of 100 kS/s for any channel. You can acquire data

from one to four channels at 100 kS/s each, six channels at 66.7 kS/s each, and so on, up to eight channels at

50 kS/s each. You can start a hardware-paced scan with a software command. Optionally, hardware-paced scans

can be delayed by an external hardware trigger event.

BURSTIO

When using BURSTIO, the USB-1608FS-Plus-OEM can acquire data at a higher rate using the full capacity of

the 32 kilosample FIFO. The acquired data is read from the FIFO and transferred to a user buffer in the

computer after the acquisition is complete. You can initiate a single acquisition sequence of one to eight

channels with a software command. Optionally, BURSTIO scans can be delayed by an external hardware

trigger event.

When BURSTIO is enabled, the number of samples acquired in a scan is limited to the depth of the onboard

memory. The maximum sample rate in BURSTIO mode is an aggregate rate of 800 kS/s. The maximum per

channel sample rate is 100 kS/s for any or all channels.

USB-1608FS-Plus-OEM User's Guide Functional Details

Board components

Board components are shown in Figure 2.

1 Header connectors 21 to 40 3 USB connector

2 LED 4 Header connectors 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 +5 V power

and communication. No external power supply is required.

LED

The LED indicates the USB communication status; it cannot be disabled.

LED behavior

LED state Indication

On – steady green The device is connected to a computer or external USB hub.

Blinks once A USB command is received.

Blinks continuously An analog input scan is in progress.

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