Industrial Ethernet refers to the use of standard Ethernet protocols with rugged connectors such as SPE (single-pair Ethernet) T1 or Cat 8, used in heavy duty applications. Connectors can be pre-assembled or field-attachable for copper and fiber optic cables. Industrial Ethernet incorporates industrial Ethernet protocols such as PROFINET®, EtherNet/IP®, EtherCAT®, SERCOS III, and POWERLINK®.