Measurement Computing USB-1608FS-Plus-OEM User manual

USB-1608FS-Plus-OEM
Analog and Digital I/O
Document Revision 2A
December 2014
©Copyright 2014
User's Guide

HM USB-1608FS-Plus-OEM
Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are
either trademarks or registered trademarks of MeasurementComputing Corporation. Refer to the Copyrights &
Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company namesmentioned herein are trademarks or trade names of their respective
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©2014 MeasurementComputingCorporation. All rights reserved. No part of this publicationmay be
reproduced, stored in a retrieval system, or transmitted, in any form by any means, electronic,mechanical, by
photocopying, recording, or otherwise without the prior written permission of Measurement Computing
Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, a) are intended for surgical implantation
into the body, or b) support or sustain life and whose failure to perform can be reasonably expected to result in
injury. Measurement Computing Corporation products are not designed with the components required, and are
not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of
people.

3
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
4
Memory ............................................................................................................................................................20
Microcontroller.................................................................................................................................................20
Power................................................................................................................................................................21
General .............................................................................................................................................................21
Environmental ..................................................................................................................................................21
Mechanical .......................................................................................................................................................21
Header connector and pinout............................................................................................................................21

5
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: [e-mail]
Phone: [phone] 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.

6
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
7
Functional block diagram
USB-1608FS-Plus-OEM functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram

8
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.

9
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
10
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.