Ethernet Bypass Switch

Abstract: An ASIC solution is studied and designed to solve a possible communication interruption due to power failures of automation servers connected in serial topologies. This installation method is widely employed in industrial Ethernet networks. However, it presents a disadvantage, a failure in a network’s node isolates the following nodes until maintenance repairs it. The solution studied during this thesis bypasses the damaged node allowing the communication between the rest of the chain. The circuit proposed consists on CMOS switches powered up by harvesting energy from the Ethernet communication lines. An analysis of the transmission data signals was conducted in order to model the application environment and determine the requirements for the project. Simulations were performed with schematics and layout in order to verify the concept. A solution based on an ASIC was proven to be feasible. This research was conducted in collaboration with Schneider Electric.