RF adapter for field device
AssigneeRosemount Inc.
InventorsJohn A. Kielb, Robert J. Karschnia, Brian L. Westfield, Kelly M. Orth, David A. Broden
Life of this patent
Estimating the term…
Abstract
An adapter for coupling to a process control transmitter of the type used to monitor a process variable in an industrial process is provided. The adapter includes I/O circuitry configured to couple to a two wire process control loop and to the process control transmitter and communicate on the process control loop. Wireless communication circuitry couples to the two wire process control loop and is configured to transmit an RF signal. Power supply circuitry provides power to the wireless communication circuitry.
Claims38
An adapter for coupling to a process control transmitter of the type used to monitor a process variable in an industrial process, the adapter comprising:
- I/O circuitry configured to couple to a two wire process control loop and to the process control transmitter and to communicate on the process control loop;
- wireless communication circuitry coupled to the two wire process control loop configured to transmit an RF signal;
- power supply circuitry coupled to the two wire process control loop configured to provide power to the wireless communication circuitry;
- bypass circuitry connected in parallel with the power supply circuitry;
- and
- wherein the power supply circuitry and the bypass circuitry are configured to connect in series with the two wire process control loop.
A method of providing wireless communication capabilities to an existing process control transmitter of the type used to monitor a process variable in an industrial process, the method comprising:
- electrically coupling to the process control transmitter and to a two wire process control loop and communicating on the two wire process control loop;
- transmitting an RF signal based upon data carried on the two wire process control loop;
- providing power to the wireless communication circuitry with power received from the two wire process control loop, wherein the power supply circuitry is coupled in series with the two wire process control loop;
- and
- selectively bypassing a loop current of the two wire process control loop around the power supply circuitry.
Dependencies are inferred from the claim text.