Which of the following is NOT a key component of a SCADA system?

A SCADA (Supervisory Control and Data Acquisition) system is designed for managing and monitoring industrial processes, and its key components are essential for its functionality. Each component plays a significant role in the collection, processing, and visualization of data from various industrial devices.

The Human-Machine Interface (HMI) is an essential component that allows operators to interact with the SCADA system. It provides visualizations and control mechanisms, enabling users to monitor processes in real-time and make necessary adjustments.

Programmable Logic Controllers (PLCs) are critical in a SCADA system as they are the devices that control machinery and processes based on the data received and programmed logic. They act as the primary control units that execute control commands.

Remote Telemetry Units (RTUs) are devices that gather data from field instruments and transmit it back to the central SCADA system. They are crucial for providing real-time data from remote locations, thus enabling monitoring and control over vast and often inaccessible areas.

On the other hand, a Data Warehouse Management System (DWMS) is not a core component of a SCADA system. While it focuses on data storage and analysis, providing historical data for better decision-making, it is not integral to the immediate functionalities of monitoring and controlling industrial