METHOD AND DEVICE FOR CONNECTION OF ELECTRIC-PNEUMATIC CONTROLLER WITH POSITION CONVERTER IN PROCESS CONTROL SYSTEM Russian patent published in 2015 - IPC G05B19/44 

FIELD: physics, control.

SUBSTANCE: set of inventions relates to control systems. Proposed process control device comprises position converter. The latter includes position pickup that varies current signal in response to actuator position connected with control device. It is provided with the first and second contacts connected with power supply. Electric-pneumatic controller is equipped with first contact connected with position converter first contact and second contact connected with grounding potential. Resistor is arranged outside the position converter and electric-pneumatic controller and connected between first and second contacts of the latter. Note here that position converter transmits current signal from first contact of the latter to that of electric-pneumatic controller.

EFFECT: communication between position converter and electric-pneumatic controller without control circuit readjustment, ruled out the use of grounding circuits between said controller and said converter.

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