what is type of protocol used in instrument field to marshalling cabinet cabel

what is type of protocol used in instrument field to
marshalling cabinet cabel. what is the differenance between
bus cabel and instrument cabel?

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what is type of protocol used in instrument field to marshalling cabinet cabel. what is the differ..

Answer / anas

Typically in the industry, below signal type is used as communication protocol between field devices and marshalling/system cabinet.
Analog signal = 4-20mA, HART protocol for advance application
Digital signal = 0-24V
Alternatively, there is also PROFIBUS and FIELDBUS.

In terms of cabling, instrument cable is a typical 1-2mm copper multicore cable while bus cable refers to application involving PROFIBUS and FIELDBUS.

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