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Process field device with radio frequency communication

  • US 20050289276A1
  • Filed: 06/28/2004
  • Published: 12/29/2005
  • Est. Priority Date: 06/28/2004
  • Status: Active Grant
First Claim
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1. A field device for use in an industrial process control or monitoring system, comprising:

  • terminals configured to connect to a two-wire process control loop configured to carry data and to provide power;

    radio frequency (RF) communication circuitry configured for radio frequency communication; and

    power supply circuitry configured to power the RF circuitry using power received completely from the two-wire process control loop.

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