NI Unveils Six Low-Cost Digital I/O Devices for Real-Time Applications

5/26/2004 - National Instruments announced six new low-cost, optically isolated digital I/O devices that deliver a high-reliability industrial feature set for applications in discrete, batch and process automation. Each device offers industrial features such as watchdog timers, optical isolation, 24 V logic levels, programmable power-up states, programmable input filters, change detection and industrial certifications.

Starting at $345 or $5 per I/O channel, the NI 651x family of DIO devices includes:

The 24 V logic levels included in these devices offers direct connection to industrial sensors and actuators, and are completely software programmable without jumpers. Engineers can use programmable power-up states to configure the initial digital state in software and ensure safe operation when controlling industrial actuators such as pumps, valves, motors and relays. Programmable input filters eliminate input noise, remove glitches and spikes and provide debouncing for digital switches and relays. Digital I/O watchdogs protect against a variety of fault conditions including computer and application crashes.

The NI 651x family also delivers innovative NI-DAQmx driver software technology on both Windows and LabVIEW Real-Time operating systems, offering superior ease of use and deterministic performance. NI-DAQmx, the newest version of National Instruments measurement services software, includes automatic code generation for creating applications in NI LabVIEW, C, Microsoft Visual Basic .NET and C#. NI DAQ Assistant, a key feature of NI-DAQmx, guides engineers to fast, accurate input/output without requiring any programming. NI-DAQmx also offers multithreading streaming technology that delivers up to 100 times faster I/O throughput for concurrent operations and high-channel-count systems, as well as other advanced features including automatic timing, triggering and synchronization.

National Instruments Data Acquisition
By integrating commercial PC-based technologies and investing in innovative research and development, NI continues to lower the cost of measurement and control while improving system performance, accuracy and reliability. NI recently increased value for its data acquisition (DAQ) customers by reducing prices up to 25 percent worldwide for 13 of its most popular DAQ modules. Readers can learn more about the price reduction and view new prices on the Web at

About National Instruments
National Instruments ( is a technology pioneer and leader in virtual instrumentation – a revolutionary concept that has changed the way engineers and scientists approach measurement and automation. Leveraging the PC and its related technologies, virtual instrumentation increases productivity and lowers costs through easy-to-integrate software, such as the NI LabVIEW graphical development environment, and modular hardware, such as PXI modules for data acquisition, instrument control and machine vision. Headquartered in Austin, Texas, NI has more than 3,100 employees and direct operations in 40 countries. In 2003, the company sold products to more than 25,000 companies in 90 countries. For the past five years, FORTUNE magazine named NI one of the 100 best companies to work for in America. Readers may obtain investment information from the company’s investor relations department by calling (512) 683-5090, by sending e-mail to or by visiting

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