NI Data Acquisition Devices Are USB Compatible

National Instruments (NI) has announced its X Series multifunction data acquisition (DAQ) devices for USB, which can be used in a variety of portable test, measurement and data-logging applications. USB X Series devices integrate high-performance analogue measurement and control channels, digital I/O and counter/timers onto a single plug-and-play device. The DAQ devices include up to 32 analogue inputs, four analogue outputs, 48 digital I/O lines and four counters.

The eight new devices range from 500kS/s multiplexed AI to 2MS/s/channel simultaneous sampling AI. NI Labview graphical programming allows engineers and scientists to develop completely custom test and measurement applications for USB X Series using graphical icons and wires that resemble a flowchart. Labview 2010 can simplify data logging and analysis with a technical data management streaming option within the NI DAQ Assistant, as well as the ability to export data from a waveform graph to Microsoft Excel or NI Diadem for post processing.

USB X Series devices use the same multithreaded NI-DAQMX driver software as other National Instruments DAQ devices, allowing users to port Labview or text-based code from previous applications for use with the X Series. The company said that the USB X Series devices include two key powerful technologies: NI-STC3 technology for advanced timing and triggering and NI Signal Streaming for high-speed, bi-directional data streaming. At the core of all USB, PCI Express and PXI Express X Series devices is NI-STC3 timing and synchronisation technology, which coordinates the timing and triggering of the analogue, digital and counter subsystems.

NI-STC3 technology provides X Series devices with independent timing engines for the onboard analogue and digital I/O subsystems, making it possible for analogue and digital I/O to execute independently at different rates or together with synchronisation. X Series devices include four enhanced 32-bit counters for frequency, pulse-width modulation (PWM) and encoder operations, as well as a new 100MHz time base that can generate analogue and digital sampling rates with five times better resolution than previous devices.

USB X Series devices include NI Signal Streaming, a technology that uses message-based transfers and device-side intelligence to deliver high-speed, bidirectional data transfer over USB, making it possible to perform analogue, digital and counter operations concurrently. With this technology, simultaneous sampling is now available on two new devices, which can sample at 1.25MS/s and 2MS/s on each of their eight analogue inputs.

These devices are available with 32 or 64 MS onboard memory to guarantee finite acquisitions even with heavy USB traffic. The high sampling rates on all channels make these devices suitable for portable ultrasonic test and transient recording applications. Each USB X Series device features a redesigned, extruded aluminum enclosure. The enclosure offers an easy-access lid to keep signal wiring secure and shielded. It also has device-specific pin-out labels on the lid to allow quick determination of the corresponding screw terminals for a given channel. The enclosure also includes a lockable USB port to prevent accidental removal during operation.

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