industrial//industrial Ethernet//industrial switch

An office switch prioritizes throughput, cost and general connectivity. An industrial switch adds what a control network needs: fast and deterministic recovery after a link failure (ring redundancy protocols), time synchronization, quality of service for control traffic, support and diagnostics for industrial protocols, redundant power, extended temperature range and mechanical ruggedness for a DIN rail in a cabinet.

An office switch prioritizes throughput, cost and general connectivity. An industrial switch adds what a control network needs: fast and deterministic recovery after a link failure (ring redundancy protocols), time synchronization, quality of service for control traffic, support and diagnostics for industrial protocols, redundant power, extended temperature range and mechanical ruggedness for a DIN rail in a cabinet.

The philosophy shifts from "how much traffic can it move" to "will this frame arrive on time": in automation what matters is not only bandwidth but when the packet gets there (determinism).

It is the hardware side of industrial Ethernet: PROFINET and EtherNet/IP behave as designed only when the switches between the PLC and its devices honor their timing.