ABB | RER103 | Bus Connection Module

The ABB RER103 (including RER103-MM variants) is an advanced communication interface and bus connection module engineered specifically for ABB RE500 series protection and control relays. Designed for demanding electrical substation automation and medium-voltage power distribution environments, this module efficiently bridges optical fiber networks with electrical device architectures. It converts incoming optical signals from SPA, LON, and IEC 60870-5-103 communication protocols into electrical RS-485 signals for host RE500 devices, and vice versa. It acts as a vital networking link, empowering substation engineers and system operators with high electromagnetic interference immunity, secure data exchange, and seamless integration across complex power management grids.

The following parameters outline the technical blueprint and physical characteristics of the module, adhering to rigorous industrial power distribution standards:

• 🔹 Brand: ABB
• 🔹 Model: RER103 (RER103-MM)
• 🔹 Series: RE500 Legacy Protection and Substation Automation Platform
• 🔹 Product Name: Bus Connection Module / Communication Interface
  PLC DCS Pro Ltd.
• 🔹 Signal Conversion: Optical (Fiber) to Electrical (RS-485) and Vice Versa
  colletplc.com
• 🔹 Supported Protocols: SPA, LON, and IEC 60870-5-103
  colletplc.com
• 🔹 Host Connection: 9-Pin D-Type Subminiature Connector (Plug-in Design)
  PLC DCS Pro Ltd.
• 🔹 Country of Origin: Sweden / European Union
  PLC DCS Pro Ltd.
• 🔹 Condition Status: Brand New / Factory Sealed / Refurbished Options Available
  PLC DCS Pro Ltd.
• 🔹 Power Supply: Powered Directly from Host Device D-Type Interface (~0.4W Max)
  PLC Masters Ltd.

To support scalable substation automation expansion, legacy relay communication upgrades, and power grid modernization, the following ten related protection modules and control hardware within the ABB series are highly recommended:

• 🔸 ABB RED500 – Protection and Control Relay Series for Advanced Power Systems
• 🔸 ABB REF542plus – Multifunctional Feeder Terminal and Protection Relay Unit
• 🔸 ABB REF601 – Compact Feeder Protection and Control Relay
• 🔸 ABB REM601 – Dedicated Motor Protection and Control Relay
• 🔸 ABB REJ601 – Overcurrent and Earth-Fault Protection Relay Module
• 🔸 ABB COM600 – Station Automation and Gateway Platform for Substation Integration
• 🔸 ABB RTU560 – Advanced Remote Terminal Unit for Power Grid Telecontrol
• 🔸 ABB Relion REF615 – Feeder Protection and Control Intelligent Electronic Device (IED)
• 🔸 ABB MicroSCADA Pro – Substation Control and Supervisory System Software Platform
• 🔸 ABB SPA-ZC 302 – Bus Connection Master / Protocol Converter Unit for Substation Networks