ABB RER 103 Reliable MM Bus Connection Module for REF Series

Description

TheABB RER 103is a robust bus communication module designed for medium-voltage protection and control systems. It enables data exchange between Intelligent Electronic Devices (IEDs) and higher-level automation systems throughfiber-optic communication, ensuring high immunity to electromagnetic interference and excellent electrical isolation. Designed for seamless integration with ABB’sREF, REM, and RETprotection relay families, the RER 103 supports bothstar and ring topologies, providing flexibility for various substation network architectures. Its compact footprint and convenientDIN-rail mountingsimplify installation within switchgear panels. In addition,hot-swappingandautomatic node addressingreduce commissioning time and support easy maintenance. For instance, in a substation equipped withREF 543 feeder terminals, the RER 103 ensures fast and secure communication between relays and the station automation system for real-time fault coordination.