Remote terminal units collect data from points around a power transmission and distribution network and transmit the information to a central location. They are typically used to control and monitor power networks, and are components of supervisory control and data acquisition (SCADA) systems.

A Remote Terminal Unit (or RTU) is a microprocessor-controlled electronic device that interfaces objects in the physical world to a DCS (distributed control system) or SCADA (supervisory control and data acquisition) system by transmitting telemetry data to a master system, and by using messages from the master supervisory system to control connect [..]

Signal Data Converter;

A remote terminal unit (RTU) is a multipurpose device used for remote monitoring and control of various devices and systems for automation. It is typically deployed in an industrial environment and se [..]

A remotely controlled unit which gathers accumulated and instantaneous data to be telemetered to a specified control center which displays the current status of the generation facility. Inputs can be used for economic dispatch.