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The Control Concepts Prox Switch is a micro-controlled, field adjustable, multi-setpoint speed / rate monitor that provides 4 character alpha numeric visual indication and relay ouput. The unit offers many versatile features that provide flexibility in application and confidence in sensing. Full diagnostic functions including alarm condition (over-speed or under-speed), auto scaling (eliminates out of range parameters) and error detection. Features include Overspeed and Underspeed simultaneous monitoring, programmable relay action and non-contacting sensing. This unit is packaged in a NEMA 4/5 enclosure with a transparent Lexan cover for dust and moisture protection.

Operating Theory:
The speed monitor unit utilizes a microcontroller and pro-prietary internal software routine to precisely monitor the speed or rate of the process. The pulses from a ferrous target are converted to an electrical signal. The micro-controller calculates the integral time between the pulses, then compares that value mathematically to the pre-programmed settings selected by the user. The micro-controller has the ability to execute 4 million instructions per second. The fast execution allows it to accurately monitor very fast or very slow speed / rate conditions. The microcontroller also provides flexibility while offering many options found in high-priced computer controlled systems.