The FENA-01 module supports three protocols Modbus-TCP, Ethernet/IP and the PROFINET IO RT network. The Modbus-TCP protocol is simply the Modbus protocol used on top of Ethernet-TCP/IP. Modbus-TCP is an open Industrial Ethernet network which has been specified by the Modbus-IDA user organization. Ethernet/IP is based on the common industrial protocol (CIP), which is also the framework for both the ControlNet™ and DeviceNet™ network protocols. PROFINET IO RT is an open network based on the PI organization standard. The FENA-01 supports 10/100 Mbps transfer rate with network connections made with Cat 5 wiring and RJ45 connectors. Both star and bus topology options are supported.