Digital I/O and counter card

April 2003 Maintenance, Test & Measurement, Calibration

An add-on PC compatible, digital I/O and counter card with 32 digital input channels, 32 digital output channels and three programmable counter/timer channels is available from ProMicro.

The digital I/O channels on the PCL-720 are TTL-compatible and use 74LS244 driver/buffer circuits to provide a high output driving capacity. These buffered circuits also require a lower input loading current than regular TTL circuits.

Its 8254 programmable counter/timer provides three flexible 16-bit counter/timer channels. Waves and pulses can be generated by programming the 8254 and a breadboard area is available for customised circuits. Typical applications for the PCL-720 include, for example, contact closure monitoring, use as a switch-panel status sensor and as a digital signal interface.

For more information contact Elton Prytz, ProMicro, 011 706 7913, [email protected], www.promicro.co.za

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