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Ethernet DAQ system tips distributed sensor data

Posted: 06 Aug 2010 ?? ?Print Version ?Bookmark and Share

Keywords:DAQ? modular instrumentation? chassis? Ethernet?

National Instruments debuts a new Ethernet-based modular DAQ system that combines the ease of use and low cost of a data logger with the performance and flexibility of modular instrumentation. The NI CompactDAQ cDAQ-9188 has a chassis designed to hold eight I/O modules for measuring up to 256 channels of electrical, physical, mechanical or acoustic signals in a 250mmx90mmx90mm rugged form factor. It offers more than 50 I/O modules to choose from, enabling engineers and scientists to build remote or distributed, high-speed measurement systems using standard GbE infrastructure. It also simplifies initial setup with zero configuration networking technology and a built-in, Web-based configuration and monitoring utility.

NI CompactDAQ uses patented NI Signal Streaming technology to deliver high-bandwidth data over Ethernet to a host computer. NI Signal Streaming provides the ability to maintain bidirectional analog and digital waveforms continuously over a TCP/IP connection. With NI-STC3 timing and synchronization technology, each chassis also can manage up to seven separate hardware-timed I/O tasks at different sample rates, including analog I/O, digital I/O and counter/timer operations. The chassis operates in a temperature range of -20C to 55C and can withstand up to 30g shock and 3g vibration, making NI CompactDAQ suited for demanding test applications on the benchtop, in the field or on the production line.

In addition to the Ethernet chassis, the DAQ platform includes a four- and an eight-slot USB chassis and NI C Series I/O modules. NI offers more than 50 C Series modules to use interchangeably in NI CompactDAQ systems, each of which is hot-swappable and auto-detectable for simplified setup. C Series modules offer integrated signal conditioning and multiple connectivity options to create custom, mixed-measurement systems specific to the needs of an application. A single analog input module, for example, can acquire up to four channels of simultaneous 1MSps voltage inputs for measuring high-speed signals such as ballistic pressure or ultrasonic transducers.

NI-DAQmx driver software, which is included with NI CompactDAQ, goes beyond a basic device driver to deliver increased productivity and performance. With NI-DAQmx, engineers and scientists can log data for simple experiments or develop a complete test system in NI LabVIEW, NI LabWindows/CVI, ANSI C/C++ or Microsoft Visual Studio .NET. Furthermore, a consistent API means that an application developed for an NI CompactDAQ USB chassis will work with an NI CompactDAQ Ethernet chassis without any changes to software.

Programming NI CompactDAQ with LabVIEW delivers the most performance for the least effort. LabVIEW graphical programming makes it possible for engineers and scientists to develop sophisticated measurement, test and control systems using intuitive graphical icons and wires that resemble a flowchart. The multiple timing engines featured on NI CompactDAQ chassis complement the multicore optimizations in LabVIEW to make programming multiple measurement tasks in parallel easy. LabVIEW also offers integration with thousands of other hardware devices and provides hundreds of built-in libraries for advanced analysis and data visualization.

The cDAQ-9188 CompactDAQ Chassis is priced at $1,399.

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