Related Manuals for Measurement Computing USB-7204
Summary of Contents for Measurement Computing USB-7204
- Page 1 USB-7204 Analog and Digital I/O User's Guide Document Revision 8 March 2013 © Copyright 2013...
- Page 2 © 2013 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
About this User's Guide ........................5 Conventions ................................ 5 Where to find more information ......................... 5 Chapter 1 Introducing the USB-7204 ........................6 USB-7204 block diagram ........................... 7 Chapter 2 Installing the USB-7204 ........................8 What comes with your shipment? ........................8 Hardware .................................. - Page 4 USB-7204 User's Guide Non-volatile memory ............................25 Microcontroller ..............................26 Indicator LEDs ..............................26 Power ................................26 General ................................27 Environmental ..............................27 Mechanical ............................... 27 Screw terminal connector and pinout ....................... 27 OEM connector and pinout (P4) ........................29 Trigger/Sync connector and pinout (P5) ......................
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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 USB-7204 hardware is available on our website at www.mccdaq.com. You can also contact Measurement Computing Corporation with specific questions. -
Page 6: Introducing The Usb-7204
Chapter 1 Introducing the USB-7204 The USB-7204 is a USB 2.0 full-speed device that is supported under the following operating systems: Microsoft Windows 7/Vista/XP (32-bit or 64-bit) Microsoft Windows CE Macintosh (32-bit or 64-bit) Linux (32-bit or 64-bit) The USB-7204 is compatible with both USB 1.1 and USB 2.0 ports. -
Page 7: Usb-7204 Block Diagram
USB-7204 User's Guide Introducing the USB-7204 USB-7204 block diagram USB-7204 functions are illustrated in the block diagram shown here. Figure 1. USB-7204 functional block diagram... -
Page 8: Installing The Usb-7204
Installing the software : Before installing the USB-7204 hardware, you must install the software you plan to use with the device. Note The USB-7204 is supported by DAQFlex software and Universal Library software. You can install both software packages on your computer. -
Page 9: Universal Library And Instacal
Installing the hardware Install the software before you install your device A driver needed to run the USB-7204 is installed when you install the software. Therefore, you need to install the software package you plan to use before you install the hardware. -
Page 10: Chapter 3 Functional Details
Functional Details Analog input acquisition modes The USB-7204 can acquire analog input data in software paced and continuous scan modes. Software paced mode You can acquire one analog sample at a time in software paced mode. You initiate the A/D conversion by calling a software command. -
Page 11: Oem Connector
USB-7204 User's Guide Functional Details OEM connector The OEM connector operates in parallel with the USB connector — do not connect to both the USB connector and the OEM connector. The OEM connector is a 0.1" box header. Pins 2, 4, 6, 8, and 10 provide a USB connection, as listed in the... -
Page 12: Usb Connector
This connector operates in parallel with the OEM connector — do not connect to both the USB connector and the OEM connector. LED indicators The USB-7204 has LEDs for power and communication status. See Figure 2 for the location of each LED. LED type Indication Power Steady green: The device's microcontroller is connected to a computer or external USB hub. -
Page 13: Signal Connections
USB-7204 User's Guide Functional Details 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 CH7 IN .) Refer to Figure 4 on page 12 for the location of the analog input pins. - Page 14 USB-7204 User's Guide Functional Details Figure 5. Differential voltage example: common mode voltage of 0 V If you increase the common mode voltage to 11 V, the differential remains at ±8 V. Although the [common- mode voltage + signal] on each input now has a range of +7 V to +15 V, both inputs still satisfy the –10 V to +20 V input requirement (see Figure 6).
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Page 15: Analog Output
When used as a clock input, the SYNC pin operates in one of two modes – slave or gated slave. In slave mode, the USB-7204 ignores the first clock pulse in order to ensure adequate setup time. Use this mode when the USB-7204 is being paced from a continuous clock source, such as a generator. -
Page 16: Counter Input
7204 USB +5 V as follows: (USB-7204 @ 80 mA) + (16 DIO @ 2.5 mA ea) + (2 AO @ 15 mA ea ) = 150 mA For an application running on a computer or powered hub, the maximum available excess current is 500 mA −... -
Page 17: Accuracy
nonlinearity The primary error sources in the USB-7204 are offset and gain. Nonlinearity is small in the USB-7204, and is not significant as an error source with respect to offset and gain. Figure 9 shows an ideal, error-free, USB-7204 transfer function. The typical calibrated accuracy of the USB- 7204 is range-dependent, as explained in the Specifications chapter on page 21. - Page 18 Combining these two error sources in Figure 12, we have a plot of the error band of the USB-7204 for the ±10 V range. This is a graphical version of the typical accuracy specification of the product.
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Page 19: Channel Gain Queue
The channel gain queue feature removes the restriction of using an ascending channel sequence at a fixed gain. This feature creates a channel list which is written to local memory on the USB-7204. The channel list is made up of a channel number and range setting. An example of a four-element list is shown in the table below. -
Page 20: Mechanical Drawing
USB-7204 User's Guide Functional Details Mechanical drawing Figure 13. Circuit board dimension... -
Page 21: 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. Analog input specifications Parameter Conditions Specification A/D converter type Successive approximation type Input modes Single-ended or differential (default) Input voltage range for linear... - Page 22 USB-7204 User's Guide Specifications Parameter Conditions Specification Calibration Factory Cal factors stored in firmware. Cal factors must be applied via application software. Input current is a function of applied voltage on the analog input channels. For a given input Note 1: –12) µA.
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Page 23: Analog Output
USB-7204 User's Guide Specifications Table 6. Noise performance, differential mode Range Typical counts Least significant bit (LSB root mean square rms) ±20 V 0.30 ±10 V 0.30 ±5 V 0.45 ±4 V 0.45 ±2.5 V 0.61 ±2 V 0.76 ±1.25 V 1.06... -
Page 24: Digital Input/Output
USB-7204 User's Guide Specifications Digital input/output Table 11. Digital I/O specifications Parameter Specification Digital type CMOS Number of I/O 16 (Port 0 bit 0 through bit 7, Port 1 bit 0through bit 7) Configuration 2 banks of 8 Pull up/pull-down configuration All pins configurable via jumpers (JP1 and JP2) to Vs or Ground via 47 k resistors. -
Page 25: External Clock Input/Output
USB-7204 User's Guide Specifications External clock input/output Table 13. External clock I/O specifications Parameter Conditions Specification Pin name SYNC Pin type Bidirectional Software-selectable direction Output (default) Outputs internal A/D pacer clock. Input Receives A/D pacer clock from external source. Input clock rate... -
Page 26: Microcontroller
0452.375 Slo-Blo Subminiature Surface Mount Fuse This is the total current requirement for the USB-7204 which includes up to 10 mA for the status Note 10: LED. Self-powered hub refers to a USB hub with an external power supply. Self-powered hubs allow a Note 11: connected USB device to draw up to 500 mA. -
Page 27: General
USB-7204 User's Guide Specifications General Table 19. General specifications Parameter Specification Device type USB 2.0 (full-speed) Device compatibility USB 1.1, USB 2.0 DEFAULTS for Channel Mode = Differential programmable options and Range = ±10 V "DEV:RESET/DEFAULT" AInScan Low Channel = 0... - Page 28 USB-7204 User's Guide Specifications Table 23. Differential mode pinout Signal Name Signal Name CH0 IN HI Port 0 Bit 0 CH0 IN LO Port 0 Bit 1 AGND Port 0 Bit 2 CH1 IN HI Port 0 Bit 3 CH1 IN LO...
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Page 29: Oem Connector And Pinout (P4)
USB-7204 User's Guide Specifications OEM connector and pinout (P4) Table 25. OEM connector specifications Parameter Specification Connector type 10 position 2.54 mm (0.1 in.) box header Table 26. OEM connector pinout Signal Name Signal Name (fuse protected) D– N/C (do not connect anything to this pin) -
Page 30: 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-7204 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 31 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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