What is SCADA and its Main Components - Interview Question

SCADA (Supervisory Control and Data Acquisition) is a system used to remotely monitor and control industrial processes. It typically consists of the following main components:

• Supervisory System: The central component of the SCADA system that collects data from various remote devices and displays it to the operator.
• Remote Terminal Units (RTUs): These are the devices deployed in the field to monitor sensors, and control actuators based on commands received from the supervisory system.
• Programmable Logic Controllers (PLCs): These are used to automate processes and are often integrated with RTUs in SCADA systems.
• Communication Infrastructure: SCADA systems rely on communication networks to transmit data between the supervisory system and remote devices.
• Human-Machine Interface (HMI): This component provides a graphical representation of the process data and enables operators to interact with the system.

Understanding the role and functioning of these SCADA components is crucial for candidates preparing for SCADA-related interviews.