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Summary of Contents for Measurement Computing USB-1608FS-Plus
- Page 1 USB-1608FS-Plus Analog Input and Digital I/O User's Guide Document Revision 5A November 2014 © Copyright 2014...
- Page 2 Other product and company names mentioned herein are trademarks or trade names of their respective companies. © 2014 Measurement Computing Corporation. All rights reserved. No part of this publication may 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.
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Page 3: Table Of Contents
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 ....................... 6 Functional block diagram ........................... 6 Chapter 2 Installing the USB-1608FS-Plus ......................7 What comes with your shipment? ........................ - Page 4 USB-1608FS-Plus User's Guide External clock input/output..........................19 Counter section ..............................20 Memory ................................20 Microcontroller ..............................20 Power ................................21 General ................................21 Environmental ..............................21 Mechanical ............................... 21 Screw terminal connector and pinout ....................... 22 Declaration of Conformity ........................23...
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Page 5: Preface
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 is available on our website at www.mccdaq.com. You can also contact Measurement Computing Corporation by phone, fax, or email with specific questions. -
Page 6: Introducing The Usb-1608Fs-Plus
The device is powered by the +5V USB supply from the computer, requiring no external power. The USB-1608FS-Plus 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). -
Page 7: Installing The Usb-1608Fs-Plus
USB-1608FS-Plus. Install the software before you install your device The driver needed to run the USB-1608FS-Plus is installed with the software. Therefore, you need to install the software package you plan to use before you install the hardware. -
Page 8: Calibrating The Hardware
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-1608FS-Plus does not support field calibration. -
Page 9: Chapter 3 Functional Details
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 can attain throughput rates up to 500 S/s using a software loop. This rate is system- dependent. -
Page 10: External Components
Screw terminal pins 21 to 40 Screw terminal pins 1 to 20 USB connector Figure 2. USB-1608FS-Plus 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. -
Page 11: Signal Connections
USB-1608FS-Plus User's Guide Functional Details Figure 3. Screw terminal pinout Signal connections Analog input You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 ( CH0 IN through .) Connect unused analog input terminals to ground terminals during operation. For example, if... -
Page 12: Digital I/O
Turn the device over and rest the top of the housing on a flat, stable surface. Caution! The discharge of static electricity can damage some electronic components. Before removing the USB-1608FS-Plus from its housing, ground yourself using a wrist strap or touch the computer chassis or other grounded object to eliminate any stored static charge. -
Page 13: Counter Input
Caution! The PC +5V terminal is an output. Do not connect it to an external power supply or you may damage the device and possibly the computer. The maximum output current that can be drawn by the USB-1608FS-Plus is 500 mA. This maximum applies to most personal computers and self-powered USB hubs. Bus-powered hubs and notebook computers may limit the maximum available output current to 100 mA. - Page 14 Any deviation from this is an offset error. Figure 8 shows the transfer function with an offset error. The typical offset error specification for a USB-1608FS-Plus on the ±10 V range is ±1.66 mV. Offset error affects all codes equally by shifting the entire transfer function up or down along the input voltage axis.
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Page 15: Synchronized Operations
Figure 9. ADC Transfer function with gain error For example, a USB-1608FS-Plus exhibits a typical calibrated gain error of ±0.04% on all ranges. For the ±10 V range, this would yield 10 V × ±0.0002 = ±4 mV. This means that at full scale, neglecting the effect of offset for the moment, the measurement would be within 4 mV of the actual value. -
Page 16: Mechanical Drawings
USB-1608FS-Plus User's Guide Functional Details Mechanical drawings Figure 11. USB-1608FS-Plus circuit board (top) and enclosure dimensions... -
Page 17: Chapter 4 Specifications
Chapter 4 Specifications All specifications are subject to change without notice. Typical for 25°C unless otherwise specified. Specifications in italic text are guaranteed by design. Analog input Table 1. General analog input specifications Parameter Condition Specification A/D converter type 16-bit successive approximation type Number of channels 8 single-ended Input configuration... -
Page 18: Noise Performance
±1 V 2.12 Table 4 summarizes the noise performance for the USB-1608FS-Plus. Noise distribution is determined by gathering 50 K samples with inputs tied to ground at the user connector. Samples are gathered at the maximum specified sampling rate of 100 kS/s. -
Page 19: External Trigger
USB-1608FS-Plus User's Guide Specifications External trigger Table 6. External trigger specifications Parameter Condition Specification Trigger source External digital TRIG_IN Trigger mode Software-selectable Edge or level sensitive: user configurable for CMOS compatible rising or falling edge, high or low level. Trigger latency 2 µs + 1 pacer clock cycle max... -
Page 20: Counter Section
USB-1608FS-Plus User's Guide Specifications Counter section Table 8. Counter specifications Parameter Specification Pin name Counter type Event counter Number of channels Schmitt trigger, 47 kΩ pull-down to ground Input type Input source CTR screw terminal Resolution 32 bits Schmitt trigger hysteresis 1.01 V typ... -
Page 21: Power
USB-1608FS-Plus User's Guide Specifications Power Table 11. Power specifications Parameter Condition Specification Supply current USB enumeration < 100 mA Supply current Including DIO and SYNC output loading < 500 mA +5V power available (Note 2) Connected to externally-powered root port hub or a 4.5 V min, 5.25 V max... -
Page 22: Screw Terminal Connector And Pinout
USB-1608FS-Plus User's Guide Specifications Screw terminal connector and pinout Table 15. Connector specifications Parameter Specification Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Table 16. Connector pinout Signal Name Signal Name CH0 IN DIO0 AGND CH1 IN... -
Page 23: Declaration Of Conformity
Norton, MA 02766 Category: Electrical equipment for measurement, control and laboratory use. Measurement Computing Corporation declares under sole responsibility that the product USB-1608FS-Plus to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents: EC EMC Directive 2004/108/EC: General Requirements, EN 61326-1:2006 (IEC 61326-1:2005). - Page 24 Measurement Computing Corporation NI Hungary Kft 10 Commerce Way H-4031 Debrecen, Hátar út 1/A, Hungary Norton, Massachusetts 02766 Phone: +36 (52) 515400 (508) 946-5100 Fax: +36 (52) 515414 Fax: (508) 946-9500 http://hungary.ni.com/debrecen E-mail: info@mccdaq.com www.mccdaq.com...
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