Field Level

It is the lowest level of the automation hierarchy and consists of field devices such as sensors and actuators.

Sensors collect data on temperature, pressure, speeds, feeds, and so on, convert it to electrical signals, and relay it up to the next level. The main task of these field devices is to transfer data on processes and machines for monitoring and analysis.

On this level, control devices read input signals from the sensors and write  commands  to actuators.

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