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National Instruments NI USB-621x manual

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Download 178 pages, 3.87 Mb

DAQ M Series

NI USB-621xUser Manual

Bus-Powered M Series USB Devices

August 2006 371931A-01

Contents

NI USB-621x User Manual Page Important Information Page Contents Page Page Page Page Page Page Page About This Manual Related Documentation Page Page Getting Started Installing NI-DAQmx Installing Other Software Installing the Hardware Device Pinouts Device Specifications Device Accessories DAQ System Overview DAQ Hardware Page Signal Conditioning Programming Devices in Software Connector Information I/O Connector Signal Descriptions +5 V Power Page Analog Input Analog Input Circuitry Analog Input Range Analog Input Ground-ReferenceSettings Page Page Multichannel Scanning Considerations Page Page Analog Input Data Acquisition Methods Analog Input Digital Triggering Field Wiring Considerations Analog Input Timing Signals Page Page Page Page Page Page Page Page Page Page Page Page Getting Started with AI Applications in Software USB-6210/6211Devices Page Connecting Floating Signal Sources Page Page Page Page Page Connecting Ground-ReferencedSignal Sources Page Page Page Page USB-6215/6218Devices Differential Measurements Differential Pairs Page Referenced Single-Ended(RSE) Measurements Non-Referenced Single-Ended(NRSE) Measurements Analog Output Analog Output Circuitry AO Range Minimizing Glitches on the Output Signal Analog Output Data Generation Methods Page Analog Output Digital Triggering Connecting Analog Output Signals Analog Output Timing Signals Page Page Page Getting Started with AO Applications in Software Digital I/O Static DIO Increasing Current Drive Connecting Digital I/O Signals Getting Started with DIO Applications in Software Counters Counter Input Applications Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Counter Output Applications Page Page Page Page Counter Timing Signals Page Page Page Default Counter/Timer Pinouts Page Counter Triggering Other Counter Features Page Page Page Page Page Page PFI Using PFI Terminals as Timing Input Signals Using PFI Terminals as Static Digital I/Os Connecting PFI Input Signals PFI Filters Page Programmable Power-UpStates Isolation and Digital Isolators Digital Isolation Benefits of an Isolated DAQ Device Reducing Common-ModeNoise Page Page Digital Routing and Clock Generation 80 MHz Timebase 20 MHz Timebase 100 kHz Timebase Bus Interface USB Signal Streams Data Transfer Methods Page Triggering Triggering with a Digital Source Page Device-SpecificInformation USB-6210 Page Page USB-6211/6215 Page Page USB Page Page Page Troubleshooting Analog Input Page Analog Output Technical Support and Professional Services Page Glossary Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Index