Process control loop current verification

Details Process control loop current verification Process control loop current verification

2007-10-09

2007-10-09

Wu, Daniel (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S635000, C700S079000, C700S080000

Reexamination Certificate

active

11095386

ABSTRACT:
A process device is configured for coupling to a two wire process control loop. Loop current output circuitry is configured to apply an output current to the two wire process control loop. Loop current verification circuitry is coupled to the two wire process control loop and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry is independent from the loop current output circuitry.

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