Abstract:

Single Pair Ethernet (SPE) and its evolution into ethernet advanced physical layer technologies enable long-distance data transmission and intrinsic safety power delivery over a single twisted pair cable, breaking down the traditional physical barriers between OT and IT. This paper provides an in-depth analysis from four dimensions: policy drivers, technical standards, network architecture transformation, and typical unmanned application scenarios. It demonstrates how SPE, by establishing an “end-to-end” full-IP architecture, provides critical physical layer support for the process industry in achieving predictive maintenance, unmanned inspections in hazardous environments, and the foundational structure for digital twin models.

Key words: SPE, full network architecture, process industry, IEEE 802.3cg, IIoT