Process field device with radio frequency communication
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;
power supply circuitry configured to power the RF circuitry using power received completely from the two-wire process control loop;
an energy storage capacitor configured to store an electrical charge using power received from the two-wire process control loop;
wherein the power supply circuitry is configured to use power from the electrical charge stored on the enemy storage capacitor; and
wherein the RF circuitry is configured for bi-directional communication.
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Abstract
A field device for use in an industrial process control or monitoring system includes terminals configured to connect to a two-wire process control loop. The loop carries data and provides power to the field device. RF circuitry in the field device is provided for radio frequency communication. A power supply powers the RF circuitry using power received from the two-wire process control loop.
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Citations
24 Claims
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1. A field device for use in an industrial process control or monitoring system, comprising:
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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; power supply circuitry configured to power the RF circuitry using power received completely from the two-wire process control loop; an energy storage capacitor configured to store an electrical charge using power received from the two-wire process control loop; wherein the power supply circuitry is configured to use power from the electrical charge stored on the enemy storage capacitor; and wherein the RF circuitry is configured for bi-directional communication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for communicating in a field device for use in an industrial process control or monitoring system, comprising:
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connecting to a two-wire process control loop configured to carry data and to provide power; communicating using a radio frequency (RF) signal; powering the RF communicating using power received completely from the two-wire process control loop storing an electrical charge in a capacitor using power received from the two-wire process control loop, and using power stored by the capacitor to power the RF communicating; and wherein the communicating comprises bi-directional communicating. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification