RER 103 ABB SPA/LON/IEC 60870-5-103 Optical to RS-485 Interface

Product Overview

The ABB RER103 (including the RER103-MM variant) serves as a dual-purpose solution within the Relion® protection family. It functions primarily as a versatile bus connection interface that bridges communication between protection devices and control systems. This 100% brand new, original unit converts optical signals from SPA, LON®, or IEC 60870-5-103 buses into electrical RS-485 signals compatible with RE500 series equipment. Beyond communication, the RER103 platform provides robust voltage and frequency protection, safeguarding critical substation assets from overvoltage, undervoltage, and frequency deviations.

Technical Specifications

Engineering Advantages

• Protocol Interoperability: The RER103 eliminates communication silos by converting legacy optical signals into modern electrical RS-485. This allows older RE500 series equipment to communicate seamlessly with modern digital substation architectures via IEC 61850.

• Flexible Network Topology: Engineers can deploy the module in either star or loop topologies. This flexibility simplifies system expansion and allows for customized cable routing in complex switchgear environments.

• Configurable Idle States: The selectable line idle state (Light on/off) provides precise control over optical fiber performance. This feature prevents false signal triggers and ensures the communication link matches the specific requirements of the host device.

• Extreme Environment Resilience: With a wide operating temperature range of -40°C to +70°C, the module thrives in unconditioned industrial cabinets. The self-supervision circuitry constantly monitors internal hardware health, automatically triggering fault logs to minimize system downtime.

• Rapid Installation: The compact, plug-in D-sub connector design allows for immediate integration into host devices without complex rewiring, significantly reducing labor costs during substation upgrades.

FAQs

• Does the RER103 require specific software for configuration?

  Yes. You must use ABB PCM600 software for all parameterization, communication setup, and protection function mapping. Ensure you have the latest Connectivity Package installed for the RER103 series.

• What is the difference between the "Light" and "Dark" idle state settings?

  The selectable line idle state determines whether the optical transmitter remains active (lit) or inactive (dark) when no data transmits. You must configure this to match the requirements of the master station or the next device in the loop to maintain link integrity.

• Can this module be hot-swapped during operation?

  While the plug-in design simplifies replacement, ABB recommends powering down the host device or the specific I/O rack before insertion to ensure the D-sub pins engage without transient electrical arcing.

• Is the RER103-MM compatible with multi-mode fiber?

  The "MM" designation typically indicates compatibility with Multi-Mode optical fibers. This module optimizes signal strength for standard multi-mode glass fibers commonly used in indoor substation environments.