To achieve a Digitized Refinery, the best practice is having all control or measurement devices be connected to the distributed control system (DCS) with a rugged industrial Ethernet network to execute consistent remote manage and monitor the plant’s output and performance. The entire operation process is crucial, and the Ethernet network system must have reliable redundancy to achieve high data availability and optimal productivity. In addition, a reliable and secure auxiliary system is used to detect and track unsafe events, such as leaks, to maintain safe operations.