Remote Terminal Unit (RTU)

A Remote Terminal Unit (RTU) is a device used in substations to monitor equipment and operate it remotely. It collects data from sensors, breakers, relays, and meters and sends it to the SCADA system. It also executes control commands from the control center, ensuring smooth and reliable substation automation.

The RTU acquires data such as voltage, current, breaker status, alarms, and energy values. It supports major protocols like IEC 101/104, DNP3, Modbus, and IEC 61850. Designed for tough environments, it includes redundant power, accurate event logging, and GPS/NTP time sync. It also functions as a SCADA gateway for automation, fault monitoring, and improving grid reliability.

Features

• Real-time data acquisition from all connected devices

• Includes data logging features for long-term storage and analysis

• Built-in cybersecurity protections for secure data communication

• Designed for harsh environments with strong EMC/EMI immunity

• Electrical isolation and protection for safe field operation

• Local HMI support for viewing parameters and system status

• Supports GPS/NTP time synchronization for timestamp accuracy

• Ability to control digital outputs for remote switching operations

• Supports redundant communication and power options for improved reliability

• Event logging with accurate time stamping for SOE (Sequence of Events)

• Continuous monitoring of digital input status with precise event capture

• Scalable I/O capability to expand according to system requirements

• High-speed CPU ensures fast processing, logging, and communication

• Works as a data gateway between field devices and SCADA systems

• Supports analog inputs (0–20mA / 4–20mA) for various sensors and transducers

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