What Is SCADA?

• SCADA is formed from the first letters of "Supervisory Control And Data Acquisition"
• SCADA is the technology that enables a user to:
  • Collect data on Process & Equipment (data acquisition (DAQ)).
  • Monitor & Supervise Process at one or more geographically scattered
    distant facilities (Remote Terminal Units (RTUs))
• • Send limited control instructions to those facilities from central location
    (Master Terminal Unit (MTU)).
  

Remote Terminal Unit (RTUs)

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. 

Master Terminal Unit (MTU)

 
Master Terminal Unit (MTU) is Operator interface and operator intervention tools are usually located in a central location (MTU). This interface is normally called “operator workstation”.

The CONTROL ROOM  composed of:

PC or PLC with monitors, Keyboards, Mouse , printers, switches, pushbuttons data storage media.