SW-504 - Industrial Unmanaged Ethernet Switch 4 Ports. The SW-504 is an Industrial Unmanaged Ethernet Switch with 4 galvanically isolated ports. It has a dual input redundant power supply with a wide voltage range, which means it can be powered from USB or by a 24V factory floor. 4 Port ethernet switch Galvanically isolated ports Integrated DIN rail mount Redundant dual power inputs 5-30V dc Removable power terminals by numbered pins for easy wiring Slim footprint case Ideal for factory floor, in vehicle and marine applications