What is SCADA?
Supervisory Control and Data Acquisition
SCADA (Supervisory Control and Data Acquisition) is a control-system architecture that uses computers, networked controllers (PLCs/RTUs), and HMIs to monitor and control industrial processes — often across wide geographic areas.
SCADA architecture
A SCADA system has field instrumentation and actuators, PLCs or RTUs that acquire and control locally, a communications network, and a supervisory layer (servers + HMI) where operators visualise and command the process. Historians log data for analysis and compliance.
SCADA vs. DCS
SCADA suits distributed assets with intermittent links (utilities, pipelines, water); a DCS suits tightly-coupled continuous processes in one plant. Modern platforms converge the two, and the right choice depends on geography, criticality, and process type.
Frequently asked questions
Is SCADA the same as a PLC?+
No. A PLC is a controller that executes local logic; SCADA is the supervisory layer that monitors and coordinates many PLCs/RTUs and presents them to operators.
How is SCADA secured?+
Through IEC 62443 practices — network segmentation (zones and conduits), secure remote access, hardening, and monitoring — because SCADA controls physical infrastructure.
Pontis Systems Engineering
Controls & Critical Infrastructure Engineering Team
The Pontis Systems engineering team designs, integrates, and commissions BMS, SCADA, data-center, and industrial-automation systems across Africa. As a Schneider Electric EcoXpert™ certified partner and Digital Realty delivery partner, the team works to global standards on mission-critical infrastructure.
Related terms
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