The ABB REB103 is a Bus Connection Module engineered for the RE500 protection relay family. It provides seamless integration between the RE500 device and fiber-optic communication networks. By supporting SPA, LON®, and IEC 60870-5-103 protocols, the module enables high-speed, interference-resistant communication in demanding industrial environments. Furthermore, it ensures optimal signal integrity by converting optical signals to electrical RS-485 format.

General Information

• Manufacturer: ABB
• Series: RE500
• Product Type: Bus Connection Module
• Supported Protocols: SPA, LON®, IEC 60870-5-103

Electrical Specifications

• Power Supply: Supplied through RE500’s 9-pin D-type connector
• Signal Conversion: Converts optical SPA/LON® signals to RS-485 electrical signals
• Service Pin: Supports diagnostics for LON® nodes

Communication & Connectivity

• Connector Type: 9-pin D-type subminiature connector
• Bus Topologies: Supports Loop and Star configurations
• Collision Detection: Enabled during LON® communication

Environmental Specifications

• Operating Temperature: -10°C to +55°C
• Storage Temperature: -40°C to +70°C
• Humidity: 5% to 95%, non-condensing
• Electromagnetic Resistance: High, due to fiber-optic communication
• Mounting Method: DIN rail mounting