PROCESS CONTROLLER

• Main Author: KAKEHI ATSUYUKI
• Format: Patent
• Language: English
• Published: 22.12.1987
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

PURPOSE:To considerably improve reliability by providing current transformers which have the same resistance as a feedback resistance and input the outputs of multiplexed controllers. CONSTITUTION:A process controller converts the outputs S1A and S1B of the controllers 1A and 1B into current outputs S3A and S3B with the aid of the current transformers 7A and 7B, synthesizes them with the current output S4 of the current transformer 8, and supplies the synthesized one to one terminal of a load 9. The titled controller is so constituted that the other terminal of the load 9 is connected to the feedback resistance 10 common to the current transformers 7A and 7B, and the terminal voltage S6 of the load 9 is fed back to the current transformers 7A and 7B and simultaneously inputted to the current transformer 8 becoming a positive feedback part. In case the controllers 1A and 1B or the current transformers 7A and 7B become abnormal, a current flowing in the load 9 is kept normal. As a result a common part has only the feedback resistance 10, whereby the constitution is simplified.