Why are DC signal systems commonly used in industrial automation instruments?
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The input/output signals of industrial automation instruments are often DC signals, as they offer the following advantages: 1. During the signal transmission process in the instrument, DC signals are not affected by alternating current induction, which makes it easier to address the issue of interference resistance in such instruments. 2. DC signals are not affected by the inductance and capacitance of the transmission lines, and there is no issue with phase shift, thus simplifying the wiring. 3. DC signals are convenient for analog-to-digital and digital-to-analog conversion, thereby enabling instruments to be easily connected to data processing devices, computers, etc. 4. It is easy to obtain a reference voltage for DC signals, such as the setpoint of a regulator.
Ask and answer yourself! But it was said well!
Ask and answer yourself! But it was said well!
The resistance to interference in DC transmission is particularly evident, and it provides support