Differences between SCADA and Internet of Things
IoT comes from sensor network concept. Actually, the main goal of it is to standardize sensor network and also data gathering and aggregation frameworks.
Hence the first idea behind it was to measurement and mining of data. However, Scada is an automation and control networking framework which the main concern is to control the actuator network and of course to measure physical parameters for control.
Hence IoT doesn’t address the Scada real-time and reliable network needes for industrial control. However industrial IoT focused on QoS constraints of a real industrial network however it still doesn’t include controller builtin. IIoT cane is used as a network infrastructure for Scada.
SCADA (supervisory control and data acquisition) is a system that monitors and control industrial, infrastructure, and facility-based processes that exist in the physical world.
SCADA usually refers to centralized systems, different of the decentralized nature of the Internet of Things elements. It can, however, be applied to SCADA as data acquisition/actuator nodes, as long as it provides security and accuracy required by SCADA standards.