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Digital I/O devices

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article image Optically isolated digital I/O devices.

NATIONAL Instruments has released six optically isolated digital I/O devices for applications in discrete, batch, and process automation.

Each device offers industrial features such as watchdog timers, optical isolation, 24V logic levels, programmable power-up states, programmable input filters, change detection, and industrial certifications.

The 24V logic levels offer direct connection to industrial sensors and actuators, and are 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 has NI-DAQmx driver software on both Windows and LabVIEW real time operating systems. 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. It also offers automatic timing, triggering, and synchronisation.

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