Abstract
A hardware interface and expansion system for PC-based data acquisition and control systems was developed for use within the Kansas State University Agricultural Engineering Department. The system, consisting of an interface box and analog input satellite boards, was designed to allow easy connection of sensors and to expand the original analog input capacity. The interface boxs star topology analog bus and the satellite boards optional thermocouple temperature compensation circuitry and instrumentation amplifier support are discussed. A variety of applications using the technology are presented.
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