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DAQ M Series
NI USB-621x User Manual
Bus-Powered M Series USB Devices
NI USB-621x User Manual
August 2006
371931A-01
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Support Worldwide Technical Support and Product Information ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 1800 300 800, Austria 43 0 662 45 79 90 0, Belgium 32 0 2 757 00 20, Brazil 55 11 3262 3599, Canada 800 433 3488, China 86 21 6555 7838, Czech Republic 420 224 235 774, Denmark 45 45 76 26 00, Finland 385 0 9 725 725 11, France 33 0 1 48 14 24 24, Germany 49 0 89 741 31 30, India 91
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Important Information Warranty The USB-6210, USB-6211, USB-6215, and USB-6218 devices are warranted against defects in materials and workmanship for a period of three years from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and labor. The media on which you receive National Instruments software are warranted not t
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NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION, INCLUDING, WITHOUT LIMITATION, THE APPROPRIATE DESIGN, PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION.
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Contents About This Manual Conventions ...................................................................................................................xiii Related Documentation..................................................................................................xiv NI-DAQmx for Windows................................................................................xiv LabVIEW ........................................................................................................xi
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Contents Chapter 4 Analog Input Analog Input Circuitry .................................................................................................. 4-1 Analog Input Range....................................................................................................... 4-2 Analog Input Ground-Reference Settings ..................................................................... 4-3 Configuring AI Ground-Reference Settings in Software................................ 4-5 Multichannel S
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Contents AI Pause Trigger Signal ..................................................................................4-23 Using a Digital Source ......................................................................4-23 Getting Started with AI Applications in Software.........................................................4-24 Chapter 5 Connecting AI Signals on the USB-6210/6211 Devices Connecting Floating Signal Sources.............................................................................
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Contents Chapter 7 Analog Output Analog Output Circuitry................................................................................................ 7-1 AO Range ...................................................................................................................... 7-2 Minimizing Glitches on the Output Signal.................................................................... 7-2 Analog Output Data Generation Methods.............................................................
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Contents Pulse-Width Measurement ..............................................................................9-5 Single Pulse-Width Measurement.....................................................9-5 Buffered Pulse-Width Measurement.................................................9-5 Period Measurement........................................................................................9-6 Single Period Measurement ..............................................................9-7 Buffered Pe
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Contents Counter n A, Counter n B, and Counter n Z Signals ...................................... 9-28 Routing Signals to A, B, and Z Counter Inputs................................ 9-28 Counter n Up_Down Signal............................................................................ 9-28 Counter n HW Arm Signal.............................................................................. 9-28 Routing Signals to Counter n HW Arm Input .................................. 9-28 Counter n Internal
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Contents Chapter 11 Isolation and Digital Isolators Digital Isolation .............................................................................................................11-2 Benefits of an Isolated DAQ Device .............................................................................11-2 Reducing Common-Mode Noise ...................................................................................11-2 Creating an AC Return Path..........................................................
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Contents Appendix B Troubleshooting Appendix C Technical Support and Professional Services Glossary Index Device Pinouts Figure A-1. USB-6210 Pinout .................................................................................. A-2 Figure A-2. USB-6211/6215 Pinout......................................................................... A-5 Figure A-3. USB 6218 Pinout .................................................................................. A-8 NI USB-621x User Manual xii ni.com
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About This Manual The NI 621x User Manual contains information about using the National Instruments USB-621x data acquisition (DAQ) devices with NI-DAQmx 8.3 and later. NI 621x devices feature up to 32 analog input (AI) channels, up to two analog output (AO) channels, up to eight lines of digital input (DI), up to eight lines of digital output (DO), and two counters. Conventions The following conventions are used in this manual: <> Angle brackets that contain numbers separated by an ellipsi
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About This Manual Related Documentation Each application software package and driver includes information about writing applications for taking measurements and controlling measurement devices. The following references to documents assume you have NI-DAQ 8.3 or later, and where applicable, version 7.0 or later of the NI application software. NI-DAQmx for Windows The NI-DAQmx for USB Devices Getting Started Guide describes how to install your NI-DAQmx for Windows software, your NI-DAQmx-sup
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About This Manual tools. Refer to the following locations on the Contents tab of the LabVIEW Help for information about NI-DAQmx: � Getting Started»Getting Started with DAQ—Includes overview information and a tutorial to learn how to take an NI-DAQmx measurement in LabVIEW using the DAQ Assistant. � VI and Function Reference»Measurement I/O VIs and Functions—Describes the LabVIEW NI-DAQmx VIs and properties. � Taking Measurements—Contains the conceptual and how-to information you need to ac
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About This Manual .NET Languages without NI Application Software The NI Measurement Studio Help contains function reference and measurement concepts for using the Measurement Studio NI-DAQmx .NET and Visual C++ class libraries. This help collection is integrated into the Visual Studio .NET documentation. In Visual Studio .NET, select Help»Contents. Note You must have Visual Studio .NET installed to view the NI Measurement Studio Help. Device Documentation and Specifications The NI 621x Sp
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1 Getting Started Figure 1-1. USB-6210/6211 © National Instruments Corporation 1-1 NI USB-621x User Manual
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Chapter 1 Getting Started Figure 1-2. USB-6215/6218 NI 621x devices feature up to 32 analog input (AI) channels, up to two analog output (AO) channels, 8 lines of digital input (DI), 8 lines of digital output (DO), and two counters. If you have not already installed your device, refer to the NI-DAQmx for USB Devices Getting Started Guide. For specifications, refer to the NI 621x Specifications document on ni.com/manuals. Before installing your DAQ device, you must install the software you
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Chapter 1 Getting Started Installing the Hardware The NI-DAQmx for USB Devices Getting Started Guide contains non-software-specific information about how to install USB devices. Device Pinouts Refer to Appendix A, Device-Specific Information, for NI 621x device pinouts. Device Specifications Refer to the NI 621x Specifications, available on the NI-DAQ Device Document Browser or ni.com/manuals, for more detailed information about NI 621x devices. Device Accessories NI offers a variety of acce
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2 DAQ System Overview Figure 2-1 shows a typical DAQ system, which includes sensors, transducers, signal conditioning devices, cables that connect the various devices to the accessories, the M Series device, programming software, and PC. The following sections cover the components of a typical DAQ system. DAQ DAQ Personal Computer Hardware Software or Laptop Figure 2-1. Components of a Typical DAQ System DAQ Hardware DAQ hardware digitizes signals, performs D/A conversions to generate analo
