DUAL CONTROL SYSTEM FOR OPENING AND CLOSING VALVE

摘要

The present invention relates to a dual system for controlling the opening and closing of a valve. The system includes: a first valve adjusting unit which receives a first signal controlling the valve to be opened, outputs a first current corresponding to the size of the first signal, and supplies the first current to the valve or blocks the supply of the first current from the valve; a second valve adjusting unit which receives a second signal controlling the valve to be opened, outputs a second current corresponding to the size of the second signal, and supplies the second current to the valve or blocks the supply of the second current from the valve; and a valve opening/closing signal transmission unit which transmits the first and second signals. The valve is opened only when the size of at least one of the first and second signals available to the valve as a supply is equal to or larger than a predetermined value.