A control system, in the context of ISA/IEC 62443, refers to the hardware and software components of an Industrial Automation and Control System (IACS). This includes PLCs, SCADA, DCS, HMIs, sensors, actuators, and supporting networks and applications used to monitor and control physical processes.
[Reference: ISA/IEC 62443-1-1:2007, Section 3.2.1 (Definition of control system and IACS)., , ]
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