CLOUD-IO: A Modular Digital Controller for High-Voltage Substation Automation

At the same time, many utilities face the challenge of integrating modern digital technologies into existing infrastructures, where legacy equipment must continue to operate alongside new systems.

To address these evolving needs, Omexom has developed CLOUD-IO, a compact and modular automation controller designed specifically for high-voltage substations. Combining gateway, RTU (Remote Terminal Unit), PLC (Programmable Logic Controller) and remote I/O capabilities in a single solution, CLOUD-IO helps operators connect, monitor, control and optimize critical grid assets. Its modular architecture allows the platform to be adapted to different applications by combining processing, communication and I/O capabilities according to project requirements.

Whether deployed in a fully digital substation or integrated into an existing installation, CLOUD-IO acts as a flexible automation and communication layer for substation monitoring, control and data acquisition.

The solution collects information from multiple sources, processes and consolidates data, executes automation functions and securely transmits operational information to supervisory systems. It also enables remote control capabilities, allowing operators to manage assets directly from control centers when required.

By transforming raw operational data into operational value, CLOUD-IO helps utilities improve asset management, optimize maintenance strategies and enhance network reliability.

One of CLOUD-IO’s major advantages is its ability to support the digital transformation of existing substations without requiring extensive infrastructure replacement.

The solution supports a wide range of industry-standard communication protocols, including IEC 61850, IEC 60870-5-104, Modbus and MQTT, enabling seamless integration with both legacy and modern systems. Its compact DIN-rail design also makes installation possible in space-constrained control cabinets and electrical enclosures.

Typical CLOUD-IO Applications :

• Remote-control gateways for substations
• Monitoring data gateway
• Digitalizing I/O in electrical cabinets
• Monitoring and control of low-voltage breakers
• Integration of legacy assets into modern digital architectures

This flexibility makes CLOUD-IO a practical solution for utilities seeking to modernize infrastructure while protecting existing investments.

As substations become increasingly connected, cybersecurity for electrical infrastructure is critical.

CLOUD-IO was designed with security at its core, incorporating secure web access, encrypted communications, role-based authentication and advanced monitoring capabilities. These features help utilities implement secure remote connectivity while supporting the cybersecurity requirements of modern substation architectures.In addition to supporting secure remote maintenance, the platform enables operators to access operational data safely while reducing the need for on-site interventions.

In addition to supporting secure remote maintenance, the platform enables operators to access operational data safely while reducing the need for on-site interventions.

Built and developed in Nantes, France, CLOUD-IO reflects Omexom’s commitment to delivering practical solutions for substation digitalization, grid modernization and intelligent asset management.

By combining multiple automation functions into a single scalable controller, the solution helps utilities simplify architecture, improve operational visibility and unlock greater value from substation data.

As electrical networks continue to evolve, technologies such as CLOUD-IO help operators make smarter decisions, increase operational efficiency and build more resilient, secure and sustainable power systems.