A Large-Scale Ethernet Network Has Been Implemented at Mini Maritsa Iztok

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Rotec

On April 14, 2025

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As part of its ongoing digital transformation, Mini Maritsa Iztok EAD has implemented a large-scale, high-reliability Ethernet network to support its field infrastructure. Spanning dozens of kilometers, the network connects over 20 facilities, each with its own local copper-based subnetwork, while the backbone is built with fiber optic connections using a DLR (Device Level Ring) topology.

DLR Topology with High Redundancy

The core of the system is a ring-based optical network, managed by two redundant core switches to ensure continuous operation in case of failure. Each local facility connects via copper Ethernet, allowing flexible integration of operator stations, sensors, and control devices.

Allen-Bradley Stratix – The Gold Standard in Industrial Networking

At the heart of the network are industrial Layer 3 managed switches from the Allen-Bradley Stratix 5400 series, including:

1783-HMS8SG4CGR – 8 SFP (fiber) and 4 RJ45 ports;
1783-HMS4EG8CGR – 8 fiber and 4 copper ports;
1783-SFP1GLX – SFP modules for long-range fiber communication;
1784-SD1 – industrial SD cards for configuration storage.

These devices offer:

✅ High tolerance to vibrations, dust, and temperature fluctuations;
✅ Full support for DLR, VLAN, QoS, IGMP snooping, and Layer 3 routing;
✅ Cisco-compatible CLI and integration with FactoryTalk Network Manager;
✅ Seamless connection to SCADA and PLC systems via the CIP protocol.

Rotek Ltd. – Trusted Supplier with Proven Experience

Rotek Ltd., an official supplier of Allen-Bradley products, delivered all necessary equipment for the network’s construction. With extensive experience in industrial automation, Rotek guarantees:

Premium-grade components from trusted manufacturers;
Professional technical consulting and system design support;
On-time delivery and complete product documentation.

This project exemplifies how a modern industrial communication network can be built on reliable technology like Allen-Bradley Stratix switches, combined with the expertise and dependability of Rotek Ltd.. The new Ethernet infrastructure at Mini Maritsa Iztok EAD not only enhances operational communication and monitoring but lays a solid foundation for intelligent control and real-time data management in the future.