Distributed control systems include, among other components, workstations (operation and engineering), controllers, I/O cards, I/O buses, a high-speed control network, and technology of

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Figure 8 shows a simple SCADA system consisting of a master unit (MTU) and a remote unit (RTU). The MTU and RTU must be equipped with the necessary equipment.

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A) THE MASTER STATION Receives data on the conditions of the equipment in the field, which is sent by the remote stations (RTUs). It processes the information and sends commands.

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