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A '''process automation''' or '''automation system''' ('''PAS''') is used to automatically control a process such as chemical, oil refineries, paper and [[wood pulp|pulp]] factories.
The PAS often uses a network to interconnect sensors, controllers, operator terminals and actuators.
A PAS is often based on open standards in contrast to a DCS ([[distributed control system]]), which is traditionally proprietary.
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== Process automation and energy efficiency ==
Process automation systems typically consist of several components that work together to control and monitor the process. These components may include:
#Sensors: Sensors measure various parameters such as temperature, pressure, flow rate, and chemical composition. These sensors generate signals that are transmitted to the controller.
#Controllers: Controllers are devices that receive input signals from the sensors and use that information to make decisions about adjusting the process. Controllers can be simple or complex, depending on the complexity of the process being controlled.
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