Industrial Ethernet switches connect several stations in a network with each other. Switches are available in different designs. They differ in the number of ports, the transmission speed up to 10 GBit and the possibility of administration. Industrial Ethernet switches are usually equipped with a robust housing, can be mounted on DIN rails and have extended temperature ranges for operation. PoE switches are also being used more and more frequently in a wide variety of industries, as up to 90 W can be made available via Ethernet to supply Powered Devices (PD).