Acromag has a feature specifically engineered for Ethernet networks called i2o. This feature allows input remote I/O modules to talk directly to output modules. In the typical network, there is a Master and many Slaves where the Slaves cannot talk to each other, only to a Master. With i2o, no Master, no special software, and no dirvers are required, the i2o feature can also act like an extended signal conditioner or a wire saver. For this application, the Acromag 961EN-4006 with six current inputs can accept the 4-20mA signals. Connect this input module to the Ethernet cable near the level transmitters, then connnect an output module, 973EN-4006 with six current outputs each, to the existing Ethernet cable at the control room. The input module is configured via the built-in web pages to send a message to one or two IP Addresses per signal. Messages are sent periodically based upon a time you choose. The i2o feature allows you to transmit six signals over one cable.