Description
The ABB RER111C-A is a specialized optical star coupler designed for high-reliability communication in industrial automation and protection systems. It serves as a central distribution hub for fiber-optic signals, allowing for the connection of multiple Intelligent Electronic Devices (IEDs) into a unified communication network. By splitting and re-transmitting optical signals, the RER111C-A ensures deterministic and low-latency communication between protection relays, substations, and control centers, providing robust immunity against electromagnetic interference (EMI) typical in high-voltage environments.
📋 Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Optical Star Coupler (RER Series) |
| Model Number | RER111C-A |
| Core Function | Optical signal distribution and network bridging |
| Usage | Fiber-optic communication in power systems/substations |
| Interface | Multiple fiber-optic ports (ST connectors) |
| Network Type | Point-to-point and multi-drop communication |
| Operating Voltage | 24–250 V DC (Wide-range power input) |
| Mounting Style | DIN-rail or rack-mount (Cabinet installation) |
| Dimensions | Standardized industrial module housing |
| Weight | Approx. 0.7 kg |
🚀 Recommended Series Models
These networking and protection components are often used alongside the RER111C-A to build fault-tolerant communication architectures:
- RER103 – Optical link converter for serial data
- RER123 – Advanced optical master unit
- SPA-ZC 400 – Data communication interface
- COM 500 – Communication unit for substation monitoring
- REX 521 – Integrated protection and control relay
- REF 615 – Feeder protection and control IED
- RED 615 – Line differential protection relay
- RER111C-B – Enhanced variant with higher port density
- SPA-ZC 302 – Fiber-optic link module
- RER125 – Optical switch module for ring topologies
Technical Note: When deploying the RER111C-A, it is critical to ensure that the fiber-optic cable types (Multi-mode vs. Single-mode) and the connector polish (ST) match your IED communication modules to prevent excessive signal attenuation.
