Electrical transmission or interconnection systems – Plural load circuit systems – Serially connected load circuits
Reexamination Certificate
2009-06-17
2011-11-01
Deberadinis, Robert L. (Department: 2836)
Electrical transmission or interconnection systems
Plural load circuit systems
Serially connected load circuits
Reexamination Certificate
active
08049361
ABSTRACT:
A wireless adapter for use with a two-wire process control loop is configured to couple to a process field device in an industrial process control system. The wireless adapter is coupled to the two-wire process control loop and provides wireless communication to the process field device. The adapter includes first and second loop terminals configured to couple in series with the two-wire process control loop. Wireless communication circuitry is coupled to the first and second loop terminals and is adapted to provide wireless communication to the process field device. Loop current bypass circuitry is electrically connected between the first and second loop terminals and is configured to provide a loop current path therebetween in response to an open circuit in wireless communication circuitry.
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Kielb John A.
Westfield Brian L.
Deberadinis Robert L.
Rosemount Inc.
Westman Champlin & Kelly P.A.
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