{"id":800,"count":32,"description":"
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NI USB Devices<\/h2>\r\n\r\n
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NI USB devices connect measurement, control, communication and test hardware directly to a computer. They provide practical PC-based solutions for analog acquisition, digital I\/O, sensor measurement, counter and timer functions, industrial communication, high-speed digitizing, FPGA development, RF testing and precision electrical measurement.<\/p>\r\n\r\n

Select a USB device according to the application requirement\u2014not only the connection type. Confirm the actual signal, required performance, software support, host-computer capability, timing architecture, accessories and installation environment before choosing hardware.<\/p>\r\n <\/div>\r\n\r\n

NI USB Device Categories<\/h3>\r\n\r\n
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USB Device Category<\/th>\r\n Primary Function<\/th>\r\n \u0422\u0438\u043f\u0438\u0447\u043d\u044b\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
USB Data Acquisition<\/td>\r\n Analog input, analog output, digital I\/O and counter functions<\/td>\r\n Sensor logging, electrical measurement, control and general automated test<\/td>\r\n <\/tr>\r\n
USB Sensor Measurement<\/td>\r\n Conditioned or sensor-specific measurement interfaces<\/td>\r\n Temperature, strain, force, pressure, vibration and sound measurement<\/td>\r\n <\/tr>\r\n
USB Digital I\/O<\/td>\r\n Digital monitoring, control and hardware-timed signals<\/td>\r\n Machine status, test fixtures, relays, alarms and industrial automation<\/td>\r\n <\/tr>\r\n
USB Counter and Timer<\/td>\r\n Pulse counting, encoder measurement, frequency and timing functions<\/td>\r\n Position, RPM, event counting, PWM and motion-related testing<\/td>\r\n <\/tr>\r\n
USB Industrial Communication<\/td>\r\n PC access to supported industrial and vehicle communication protocols<\/td>\r\n CAN, CAN FD, LIN, serial, network logging and equipment integration<\/td>\r\n <\/tr>\r\n
USB FPGA and RIO<\/td>\r\n Reconfigurable I\/O with custom FPGA timing and processing<\/td>\r\n Custom digital logic, deterministic test fixtures and prototype systems<\/td>\r\n <\/tr>\r\n
USB RF and Wireless Test<\/td>\r\n RF receive, transmit, I\/Q streaming and software-defined radio functions<\/td>\r\n Wireless research, spectrum monitoring and communications development<\/td>\r\n <\/tr>\r\n
USB High-Speed Digitizers<\/td>\r\n Triggered waveform capture and fast analog acquisition<\/td>\r\n Transient analysis, electrical validation and waveform recording<\/td>\r\n <\/tr>\r\n
USB Digital Multimeters<\/td>\r\n Precision voltage, current and resistance measurement<\/td>\r\n Calibration, production test, device characterization and electrical validation<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n <\/div>\r\n\r\n

How to Select an NI USB Device<\/h3>\r\n\r\n

1. Define the Application Function<\/h4>\r\n\r\n

Start with the result the system must provide: sensor data logging, digital machine control, communication monitoring, waveform capture, RF signal processing, precision electrical measurement or custom FPGA logic.<\/p>\r\n\r\n

One physical signal can support different engineering goals. A motor encoder may be used for position, speed, event timing or closed-loop control; the required result determines whether a digital input, counter, motion interface or FPGA device is appropriate.<\/p>\r\n\r\n

2. Identify the Electrical Interface<\/h4>\r\n\r\n

Document the signal type, voltage or current range, source impedance, connector, grounding arrangement, cable length and expected fault conditions. For sensors, also record excitation, sensitivity, calibration information and required bandwidth.<\/p>\r\n\r\n

Do not select from a device name alone. A pressure transmitter may provide voltage, current, bridge mV\/V or digital output, and each interface requires a different USB measurement architecture.<\/p>\r\n\r\n

3. Match Performance Requirements<\/h4>\r\n\r\n

Confirm required channel count, input range, resolution, accuracy, sample rate, analog bandwidth, update rate and recording duration. Dynamic waveforms, precision DMM measurements, digital events and RF I\/Q streams all use different performance criteria.<\/p>\r\n\r\n

Published resolution or maximum sample rate should not be used as the sole selection factor. Signal conditioning, input noise, host-computer resources, timing behavior and software design affect practical results.<\/p>\r\n\r\n

4. Review Timing and Synchronization<\/h4>\r\n\r\n

Determine whether the application needs software-timed monitoring, hardware-timed acquisition, external triggering, shared clocks or deterministic FPGA processing. Timing requirements are especially important for dynamic signals, digital patterns, counters, motion, RF and multidevice measurements.<\/p>\r\n\r\n

Multiple USB devices connected to the same computer are not automatically synchronized. Verify supported trigger, clock and reference-sharing methods when measurements must be time- or phase-aligned.<\/p>\r\n\r\n

5. Verify Host Computer and USB Requirements<\/h4>\r\n\r\n

USB devices rely on a host computer for configuration, acquisition, logging, analysis and user interaction. Confirm operating-system support, available USB ports, processor performance, memory, storage capacity and software compatibility.<\/p>\r\n\r\n

For continuous high-rate acquisition, evaluate the complete data path: device output, USB link, host memory, processing, file format and storage. Use direct, reliable connections and validate the final configuration at the required duration.<\/p>\r\n\r\n

6. Confirm Accessories, Protection and Installation<\/h4>\r\n\r\n

Terminal blocks, cables, adapters, probes, attenuators, external power supplies and signal-conditioning hardware can be essential parts of the final system. Confirm the complete connection path before ordering.<\/p>\r\n\r\n

Review isolation, grounding, shielding, environmental conditions and electrical protection when connecting to industrial equipment, long cables, powered circuits, motors or high-energy systems.<\/p>\r\n\r\n

USB Device Software and Drivers<\/h3>\r\n\r\n

Supported NI USB devices use the applicable driver and software environment for configuration, acquisition, control and analysis. Examples can include NI-DAQmx for data acquisition, NI-SCOPE for supported digitizers, NI-DMM for supported digital multimeters, NI-XNET for supported vehicle networks and FPGA software tools for RIO hardware.<\/p>\r\n\r\n

Before purchasing new or replacement hardware, confirm the existing application software, operating system, driver version, programming interface and required toolkits. A compatible connector does not guarantee that a newer device will work without software or wiring changes.<\/p>\r\n\r\n

When to Choose USB, CompactDAQ, CompactRIO or PXI<\/h3>\r\n\r\n
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Platform<\/th>\r\n Architecture<\/th>\r\n Best Fit<\/th>\r\n <\/tr>\r\n <\/thead>\r\n
USB Devices<\/td>\r\n Direct connection between PC and measurement or control hardware<\/td>\r\n Portable, benchtop and PC-based test applications<\/td>\r\n <\/tr>\r\n
\u041a\u043e\u043c\u043f\u0430\u043a\u0442\u043d\u044b\u0439 \u0426\u0410\u041f<\/td>\r\n Modular C Series I\/O chassis with USB, Ethernet or embedded connectivity<\/td>\r\n Mixed-signal sensor systems, expandable logging and distributed acquisition<\/td>\r\n <\/tr>\r\n
CompactRIO<\/td>\r\n Embedded real-time controller, FPGA and modular C Series I\/O<\/td>\r\n Deterministic control, custom I\/O and industrial embedded applications<\/td>\r\n <\/tr>\r\n
PXI and PXIe<\/td>\r\n High-performance modular instrumentation chassis<\/td>\r\n High-channel-count automated test, RF, switching and high-speed acquisition<\/td>\r\n <\/tr>\r\n <\/tbody>\r\n <\/table>\r\n <\/div>\r\n\r\n

Typical NI USB Device Applications<\/h3>\r\n\r\n