Industrial Ethernet refers to the use of standard Ethernet networking technology in industrial environments for automation and control applications. While it builds upon the same IEEE 802.3 standards as office Ethernet, it adapts the technology to meet the rigorous demands of the factory floor through specialized protocols and ruggedized hardware.
The key enhancements provided by Industrial Ethernet include determinism, real-time performance, and reliability. Determinism is the ability to guarantee that a message will be delivered within a specific, predictable time frame, which is critical for synchronized machine control. Unlike standard office networks, industrial protocols like PROFINET, EtherNet/IP, and EtherCAT employ various techniques to ensure consistent timing and low latency. Furthermore, Industrial Ethernet components are often physically hardened to withstand harsh conditions, including extreme temperatures, vibration, and electrical noise.
There are several competing Industrial Ethernet standards, each with different strengths. Examples include PROFINET (promoted by Siemens), EtherNet/IP (managed by ODVA), and EtherCAT (from Beckhoff). When a programmable power supply is equipped with an Industrial Ethernet interface, it can be seamlessly integrated as a peer device in a modern, high-performance automation system controlled by a PLC.
Common examples of Industrial Ethernet protocols include:
- EtherNet/IP
- EtherCAT
- PROFINET
- Modbus TCP