Without knowing what type of processor you have be warned. FX3u's will NOT communicate across TCP/IP using routers. They do NOT allow encapsulated packets. I know because we have tried for 4 months to get ours to work even trying to use the Red Lion G3 series data aquisition modules. Finally discovered this information buried deep in Mitsubishis' FX3u manuals. They will over a regular unmanaged switch but NOT across a router. $14,000 USD sandbag by Mitsubishi engineers and the local supplier.