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Develop a custom controller responsible for 12 discrete temperature zones, 1 motion controller, 8 discrete digital outputs, 4 analog inputs, and 4 analog outputs. The user interface must be sophisticated. The entire system is very cost sensitive.

The approach taken was a custom designed card cage system using s split backplane and two DC power supplies to provide true redundancy for high temperature limits. The user interface is a color CRT display with an integral "touch panel". All of the software was developed in assembly language. To minimize cost, discrete analog circuitry was used wherever possible and a data acquisition system was designed which provided approximately 0.1 degree of resolution over a 1300 degree span using only 12 bits of Analog to Digital conversion. Even with the extensive performance requirements, the design was accomplished using two 8 bit microprocessors.

A high performance, cost competitive product that exceeded all projections for product life.

6502 microprocessor
DC power supplies
Analog signal conditioning
Thermocouple signal conditioning
Color CRT interface circuitry
Assembly language development of control and CRT graphics
Touch panel interface development (hardware and software)