4-20mA TRANSCEIVER Russian patent published in 2015 - IPC H04L29/00 G08C19/02 

FIELD: electricity.

SUBSTANCE: invention relates to the methods of measurement of the process parameters and remote transmission of obtained data. The invention offers 4-20 mA transceiver, containing series-connected into the current loop a receiver part comprising a current sensor, connected to an analogue-to-digital converter, parallel stabiliser, connected to the current sensor output, transmitting a part comprising a current source, connected to a parallel stabiliser output, and digital-to-analogue converter controlling a current source, a microcontroller with external power supply or powered from the parallel stabiliser for determination of a configuration of the analogue-to-digital converter and digital-to-analogue converter, meanwhile the analogue-to-digital converter and digital-to-analogue converter are connected to the parallel stabiliser output, and their digital interfaces directly or through a galvanic separation are connected to the microcontroller, and the transceiver input is the input of the current sensor, and the transceiver output is the output of the current source.

EFFECT: creation of reliable simple device functioning both as the 4-20 mA receiver, and the 4-20 mA sensor, powered from the current loop of this interface.

3 cl, 1 dwg