关键词: uP supervisor, microprocessor supervisor, analog io, DAC, optocoupler, digital analog converter, programmable logic controller, PLC, data acquisition
Abstract: Using a DAC and a microprocessor supervisor, the system safety can be improved in industrial controllers, programmable-logic controllers (PLC), and data-acquisition systems. The analog output is set to zero-scale (or pin-programmable midscale) when a microprocessor failure, optocoupler failure, or undervoltage condition occurs. A simple application is shown on how to implement this function.
Precision DAC and Watchdog Improve Analog Output Safety.pdf
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