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Summary of Contents for Measurement Computing USB-1608FS
- Page 2 USB-1608FS USB-based Analog and Digital I/O Module User's Guide Document Revision 2, May, 2006 © Copyright 2006, Measurement Computing Corporation™...
- Page 3 Measurement Computing. Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our two missions: To offer the highest-quality, computer-based data acquisition, control, and GPIB hardware and software available—at...
- Page 4 Information furnished by Measurement Computing Corporation is believed to be accurate and reliable. However, no responsibility is assumed by Measurement Computing Corporation neither for its use; nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corporation.
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Page 5: Table Of Contents
Chapter 1 Introducing the USB-1608FS......................1-1 USB-1608FS block diagram........................... 1-2 Software features ............................1-2 Connecting a USB-1608FS to your computer is easy..................1-3 Chapter 2 Installing the USB-1608FS........................ 2-1 What comes with your USB-1608FS shipment? .................... 2-1 Hardware ..................................2-1 Additional documentation.............................. - Page 6 USB-1608FS User's Guide Power................................4-4 General ................................4-4 Environmental ..............................4-4 Mechanical ..............................4-4 Main connector and pin out ..........................4-5...
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Page 7: Preface
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-1608FS so that you get the most out of its USB data acquisition features. This user's guide also refers you to related documents available on our web site, and to technical support resources. -
Page 8: Introducing The Usb-1608Fs
Chapter 1 Introducing the USB-1608FS This user's guide contains all of the information you need to connect the USB-1608FS to your computer and to the signals you want to measure. The USB-1608FS is part of the Measurement Computing brand of USB-based data acquisition products. -
Page 9: Usb-1608Fs Block Diagram
Figure 1-2. USB-1608FS Functional Block Diagram Software features For information on the features of InstaCal and the other software included with your USB-1608FS, 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. -
Page 10: Connecting A Usb-1608Fs To Your Computer Is Easy
HID because it is a standard, and its performance delivers full control and maximizes data transfer rates for your USB-1608FS. No third-party device driver is required. The USB-1608FS is plug-and-play. There are no jumpers to position, DIP switches to set, or interrupts to configure. -
Page 11: Installing The Usb-1608Fs
As with any electronic device, you should take care while handling to avoid damage from static electricity. Before removing the USB-1608FS 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. -
Page 12: Installing The Software
To connect the USB-1608FS 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-1608FS. -
Page 13: Functional Details
Burst scan mode In burst scan mode, you can acquire data with the USB-1608FS using the full capacity of its 32 K sample FIFO. The acquired data is then read from the FIFO and transferred to a user buffer in your computer. You can initiate a single acquisition sequence of one, two, four, or eight channels by either a software command or an external hardware trigger. -
Page 14: External Components
The voltage supplied through the USB connector is system-dependent, and may be less than 5 V. No external power supply is required. The LED on the front of the USB-1608FS indicates the communication status. It uses up to 5 mA of current and cannot be disabled. -
Page 15: Screw Terminal Wiring
Functional Details Screw terminal wiring The USB-1608FS 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 20 connections. Pin numbers are identified in Fi gure 3-2 Figure 3-2. -
Page 16: Analog Input Terminals (Ch0 In - Ch7 In)
USB-1608FS User's Guide Functional Details Analog input terminals (CH0 IN - CH7 IN) You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 ( CH0 IN through .) Refer to the pinout diagram on page 3-3 for the location of these pins. We recommend that CH7 IN you connect unused analog input terminals to ground terminals during operation. -
Page 17: Digital I/O Terminals (Dio0 To Dio7)
When you configure the digital bits for input, you can use the USB-1608FS digital I/O terminals to detect the state of any TTL-level input. Refer to the switch circuit shown in... -
Page 18: Power Terminals
The USB-1608FS alone draws 150 mA of current from the USB +5 V supply. Once you start running applications with the USB-1608FS, each DIO bit can draw up to 2.5 mA. The maximum amount of +5 V current available for experimental use, over and above that required by the USB-1608FS, is the difference between the total current requirement of the USB-1608FS (based on the application), and the allowed current draw of the computer platform (500 mA for desktop computers and self-powered hubs). -
Page 19: Calibration Terminal
Functional Details Calibration terminal connection (pin 17) is an output you should use only to calibrate the USB-1608FS. Refer to the pinout diagram on page 3-3 for the location of this pin. Calibration of the USB-1608FS is software-controlled by Insta Cal. - Page 20 USB-1608FS transfer function with an offset error. The typical offset error specification for the USB-1608FS 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.
- Page 21 Figure 3-9. ADC Transfer function with gain error For example, the USB-1608FS 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.
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Page 22: Gain Queue
16 channels. When the SYNC pin is configured as an output, the internal A/D pacer clock signal is sent to the screw terminal. You can output the clock to the SYNC pin of a second USB-1608FS configured for A/D pacer input. - Page 23 An example of a master/slave configuration is shown below. Figure 3-11. Configuring for synchronous data acquisition When you are operating one USB-1608FS, do not set the option unless you are using an external EXTCLOCK clock for A/D pacing.
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Page 24: Specifications
Chapter 4 Specifications Typical for 25 °C unless otherwise specified. Specifications in italic text are guaranteed by design. Analog input section Table 1. Analog input specifications Parameter Conditions Specification A/D converter type 16-bit successive Approximation type Number of channels 8 single-ended Input configuration Individual A/D per channel Sampling method... -
Page 25: Digital Input/Output
0.28 Table 4 summarizes the noise performance for the USB-1608FS. 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 50 kS/s. -
Page 26: External Clock Input/Output
USB-1608FS User's Guide Specifications External clock input/output Table 7. External clock I/O specifications Parameter Conditions Specification Pin name SYNC Pin type Bidirectional Software selectable direction Output Outputs internal A/D pacer clock. Input Receives A/D pacer clock from external source. Input clock rate... -
Page 27: Microcontroller
(Note 7) Output current (Note 8) 350 mA max This is the total current requirement for the USB-1608FS which includes up to 10 mA for the Note 6: status LED. "Self-powered hub" refers to a USB hub with an external power supply. Self-powered hubs allow Note 7: a connected USB device to draw up to 500 mA. -
Page 28: Main Connector And Pin Out
USB-1608FS User's Guide Specifications Main connector and pin out Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Signal Name Signal Name CH0 IN DIO0 AGND CH1 IN DIO1 AGND CH2 IN DIO2 AGND CH3 IN DIO3... - Page 29 Norton, MA 02766 Category: Electrical equipment for measurement, control and laboratory use. Measurement Computing Corporation declares under sole responsibility that the product USB-1608FS to which this declaration relates is in conformity with the relevant provisions of the following standards or other...
- Page 30 Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton, Massachusetts 02766 (508) 946-5100 Fax: (508) 946-9500 E-mail: info@mccdaq.com www.mccdaq.com...
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