In an increasingly digitalised industry, traditional fieldbus systems are struggling to meet rising demands for energy efficiency, cybersecurity, and scalability. Single Pair Ethernet (SPE) offers a future-ready solution: a globally recognised Ethernet standard that transmits both data and power via a single twisted pair of copper wires. With “Power over Data Line” (PoDL) providing up to 50 watts and a reach of up to 1,000 metres, SPE is particularly suited for building and process automation.
For the RACHP sector, this opens up new possibilities. SPE eliminates the need for gateways, converters, and parallel cabling by bringing seamless IP-based communication directly to sensors and actuators. This simplifies network structures, reduces installation effort, and improves compatibility with established IT security standards such as encryption and role-based access models. Smaller connectors and reduced wiring also enable more compact, resource‑efficient device designs.
Already widely used in the automotive sector, SPE is proving its value in robotics, smart buildings, and even hazardous process environments through Ethernet‑APL. These real‑world applications underline its potential for refrigeration and air conditioning.
ASERCOM, in collaboration with the Single Pair Ethernet System Alliance (SPESA), is working to define standards and guidelines for cross‑manufacturer implementation, ensuring interoperability and a smooth transition for the industry.
The benefits are not only technical but also economic and ecological: up to 60% less cable weight, lower material use, reduced fire load, and simplified maintenance. For operators in sectors such as food retail, logistics, and large building management, SPE promises enhanced system transparency, better data access, and reduced upkeep.
In short, Single Pair Ethernet is more than a new cabling method – it is a key enabler for efficient, secure, and sustainable digitalisation in RACHP.
