Industrial control circuit using a single-chip microprocessor

摘要

An industrial control circuit includes: a first isolation circuit ( 22 ) for converting an analog signal to a low level voltage; a single-chip microprocessor SCM ( 23 ) for receiving the low level voltage from the first isolation circuit, and generating a control signal according to the low level voltage; and a second isolation circuit ( 24 ) for converting the control signal to a high level voltage. The SCM has at least thirty-two input/output (I/O) channels. Because the SCM used in the industrial control circuit has at least thirty-two I/O channels, the industrial control circuit can synchronously deal with sixteen-bit bidirectional communication.