RF adapter for field device with variable voltage drop

RF adapter for field device with variable voltage drop

  • CN 102,067,048 A
  • Filed: 06/17/2009
  • Published: 05/18/2011
  • Est. Priority Date: 06/17/2008
  • Status: Active Application
First Claim
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1. wireless adapter that in the two-wire process control loop, uses, described two-wire process control loop be configured to industrial process control system in process field device coupling, described wireless adapter is coupled to described two-wire process control loop, and provide radio communication to described process field device, described wireless adapter comprises:

  • Radio communication circuit;

    First and second loop terminals are configured to and described two-wire process control loop series coupled;

    Voltage stabilizer has the voltage stabilizer input of being coupled to described first loop terminals, and has output;

    Shunt circuit with the output coupling of voltage stabilizer, is configured to described radio communication circuit power supply;

    AndFeedback circuit is configured to control the electric current that flows to described shunt circuit from switching regulator according to the loop current of the described two-wire process control loop of flowing through.

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