Industrial control applications require complex networks with high data-rates and time sensitive devices whilst harsh environments on the plant floor create vibration, heat and other hazards. Direct-Link® Ethernet switches meet the 3 main challenges posed by industrial Ethernet applications: determinism, robustness and integration. determinism is the assurance that control communication will occur in a set period of time. unmanaged, standard duty (SD) switches in tough, Lexan plastic enclosures provide a cost effective network solution for a multitude of low-end applications. heavy duty (HD) aluminum enclosures with wide temperature operation are the solution for tougher industrial applications.