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What is a Distributed Control System
Distributed Control System is a specially designed control system used to control complex, large, and geographically distributed applications in industrial processes. In this, controllers are distributed throughout the entire plant area.
Discrete field devices such as sensors and actuators are directly connected to input and output controller modules through a communication bus. These field devices or smart instruments are capable of communicating with PLC’s or other controllers while interacting with real-world parameters like temperature, pressure, etc.
Controllers are distributed geographically in various sections of the control area and are connected to operating and engineering stations which are used for data monitoring, data logging, alarming, and controlling purpose via another high-speed communication bus.
These communication protocols are of different types such as foundation filed bus, HART, Profibus, Modbus, etc. DCS provides information to multiple displays for the user interface.