X Series DAQ devices launched by NI
A
National Instruments product story
Edited by the Engineeringtalk editorial team
Aug 7, 2009
National Instruments (NI) has launched X Series multifunction data acquisition (DAQ) devices for PCI Express and PXI Express.
The 16 X-series DAQ devices provide enhancements to analogue I/O, digital I/O, onboard counters and multi-device synchronisation.
X Series devices integrate native PCI Express support for high-throughput data transfer, advanced timing and synchronisation technology for precise measurement and control and the ability to perform advanced processing and analysis on multi-core systems.
X Series DAQ devices, which include up to 32 analogue inputs (AI), four analogue outputs (AO), 48 digital I/O lines and four counters, range from low-cost 250kS/s multiplexed AI to 2MS/s simultaneous sampling AI.
Simultaneous X Series devices integrate up to 16 ADCs on a single device at 2MS/s per channel, so engineers can sample all AI channels at a high rate and with minimal phase offset.
With high sampling on all channels, simultaneous X Series devices pass large quantities of data back to the host PC, delivering a total AI throughput of up to 64MB/s.
With the added throughput of AO, digital I/O and counter operations, total throughput can surpass 100MB/s for a single device - the practical maximum of the PCI bus.
For this reason, X Series devices use the high-throughput PCI Express bus.
PCI Express offers several benefits to data-acquisition applications, including dedicated bandwidth to each device of up to 250MB/s in each direction.
With this additional bandwidth, users can acquire larger quantities of analogue, digital and counter data and, with the dedicated nature of the bus, engineers can easily expand their systems to include multiple data acquisition devices.
The X Series devices integrate a native PCI Express interface, which is designed to provide the full 250MB/s of PCI Express bandwidth, as opposed to a PCI-to-PCI Express bridge interface, which limits the device bandwidth to that of the PCI bus.
These devices also are optimised for low-latency I/O, which improves performance in control and single-point applications.
Advanced timing and triggering functionality on multifunction DAQ devices traditionally required onboard counters, complex code or manual signal routing to achieve specialised hardware-timed performance.
NI-STC3 technology provides X Series devices with independent timing engines for the onboard analogue and digital I/O subsystems, so engineers can execute analogue and digital I/O 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 and a new 100MHz timebase that can generate analogue and digital sampling rates with five times better resolution than previous devices.
By using the multi-threaded NI-DAQmx driver software and NI Labview graphical programming, engineers can create applications that execute on multi-core processors for higher performance and more advanced analysis and data visualisation.
Labview automatically generates threads for parallel sections of code that correspond to different streams of data, so engineers with little or no programming background can spend more time problem-solving and less time programming the low-level implementation of their applications.
They can easily synchronise two or more X Series devices with new multi-device tasks and can rapidly log the acquired data to disk by adding a single new Configure Logging function to their NI-DAQmx code.
In addition, engineers can easily incorporate X Series devices into an existing data acquisition system because X Series devices use the same NI-DAQmx driver software and I/O connector as previous-generation devices.
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