Process control loop current verification

G - Physics – 08 – C

Patent

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G08C 19/02 (2006.01)

Patent

CA 2599369

A process device (12) is configured for coupling to a two wire process control loop (18) . Loop current output circuitry (60) is configured to apply an output current to the two wire process control loop (18) . Loop current verification circuitry (64) is coupled to the two wire process control loop (18) and configured to detect errors in the applied output current. At least a portion of the loop current verification circuitry (64) is independent from the loop current output circuitry (60) .

Dispositif de commande de processus (12) configuré pour être couplé à une boucle de commande de processus à deux fils (18). Des circuits de sortie de courant en boucle (16) sont configurés pour appliquer un courant de sortie à la boucle de commande de processus à deux fils (18). Les circuits de vérification du courant en boucle (64) sont couplés à la boucle de commande du processus à deux fils (18) et configurés pour détecter des erreurs dans le courant de sortie appliqué. Au moins une partie des circuits de vérification du courant en boucle (64) est indépendante des circuits de sortie du courant en boucle (60).

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