Overview

The ABB RER 103 module is a versatile bus connection interface that facilitates communication between protection and control devices using various industrial protocols. It converts optical signals from SPA, LON®, or IEC 60870-5-103 buses into electrical RS-485 signals, which are compatible with RE500 series equipment. The module is designed to work in loop or star topologies, offering flexibility in both system design and expansion. With a compact form factor and plug-in design, the RER 103 ensures easy installation into host devices via D-sub connectors. Additionally, it features a selectable line idle state, allowing users to configure whether the optical signal remains lit or dark when the line is idle.

Technical Data / Specifications

Typical Applications 

The RER 103 module is widely used in substation automation systems to interface ABB’s RE500 series protection relays with fiber-optic communication networks. Its main use cases include:

• Substation Automation: Ensures reliable data exchange between devices using SPA, LON®, or IEC 60870-5-103 protocols and RS-485 electrical interfaces, often used in remote monitoring and control systems.

• Topological Flexibility: The module supports both loop and star topologies, enhancing system resilience. In a loop topology, for example, the module ensures continuous communication even if one segment fails.

• SCADA Integration: Supports integration with SCADA systems, enabling real-time monitoring, diagnostics, and improved system visibility.

• Retrofit Projects: The selectable idle state feature and flexible topology options make the RER 103 ideal for retrofit projects and customized automation setups where flexibility and adaptability are required.

In substation operations, the module can ensure continuous and reliable communication between protection relays and remote systems, especially in highly dynamic environments that demand consistent data transmission and high availability.

FAQ

Q: What does the RER 103 module do?
A: It converts optical signals from SPA, LON®, or IEC 60870-5-103 buses into RS-485 electrical signals, making it compatible with RE500 series protection relays.

Q: What topologies does it support?
A: The module supports loop and star bus configurations, providing flexibility in system design and network fault tolerance.

Q: How is it powered?
A: The RER 103 module receives 5 VDC power from the host device and consumes about 0.4 W of power.

Q: Can the idle state of the line be configured?
A: Yes, the module includes a selectable line idle state feature that allows users to choose between Light On or Light Off when the line is idle.

Q: What is the maximum data transmission rate?
A: The module supports data transmission speeds of up to 1.25 Mbps, ensuring fast and reliable communication.