RTU is a standalone data acquisition and control unit, generally microprocessor based, which monitors and controls equipment at some remote location from the central station. Its task is to control and collect data from process equipment at field and transfer this data to a central station (MTU) Control Room. It generally also has the facility for having its configuration and control programs dynamically downloaded from some central station.PLCs is an example for RTU.
Typical RTU hardware modules include:
Control processor and associated memory - Analog inputs - Analog outputs - Counter inputs - Digital inputs - Digital outputs - Communication interface(s) - Power supply.
Reference : Practical SCADA for Industry (David Bailey, Edwin Wright)
SCADA CONTROL
