Data Acquisition & Telemetry


Digital I/O counter card with programmable clock generator

September 2000 Data Acquisition & Telemetry

The PC digital I/O counter card is a plug-in card intended to fulfil general-purpose digital input, digital output, counting and timing requirements in PC-based measurement and control applications.

The PC digital I/O counter card provides 48 digital input or output (I/O) lines and six independent 16 bit counters, called programmable interval timers. There is also an on-board, programmable clock generator (PCG) which can be used to generate very accurate frequencies or pulse trains from 0,001 953 125 Hz (ie one pulse every 512 s) to 32,768 kHz (ie one pulse every 0,3 ms). The functional configurations of the digital I/O lines and the programmable interval timers can be programmed by application software so that, under normal circumstances, no additional logic is necessary to interface external equipment.

Applications:

* Customised PC-based switching.

* Specialised test equipment.

* Digital input and output for control applications.

* Parallel interfacing a PC to other equipment.

* Accurate event timing and counting.

* Shaft encoder interfacing.

* Flow metering.

* PC independent realtime clock.

* Digital one-shots.

* Programmable rate generator.

* Square wave generator.

* Binary rate multiplier.

* Complex waveform generator.

* Complex motor controller.



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