REC615 and RER615 IEC 60870-5-101/104 Communication Protocol Manual

This document is the communication protocol manual for the REC615 and RER615 grid automation relays within the Relion product family, covering the IEC 60870-5-101 and IEC 60870-5-104 protocols. It provides technical specifications, configuration guidance, and operational details for integrating these devices into substation automation and energy management systems.