What type of control system would you use to manage large-scale devices from a central computer?

The best choice for managing large-scale devices from a central computer is the Supervisory Control and Data Acquisition (SCADA) system. SCADA is specifically designed for the centralized monitoring and control of industrial processes, infrastructure, and facility-based operations. It allows operators to oversee equipment and processes remotely, collect data in real-time, and manage control systems spread across vast geographical areas.

SCADA systems can interface with various remote terminal units (RTUs) and programmable logic controllers (PLCs) to gather data and send command signals. This makes them ideal for applications in sectors like utilities, manufacturing, and transportation, where large-scale operations need consistent oversight and quick response capabilities.

Other options, like a Programmable Logic Controller (PLC) and Fieldbus, serve more localized or specialized functions. PLCs are often used for automating specific manufacturing processes at a smaller scale, while Fieldbus is a communication network that connects various field devices but does not offer the comprehensive management capabilities SCADA does. Similarly, a Distributed Control System (DCS) is generally focused on controlling processes within a single facility rather than managing large-scale devices across wider operations, thus making SCADA the superior choice for centralized management of extensive systems.