Is a special protocol converter required to connect Modbus RTU serial interface devices to an Ethernet network? Is the serial device server sufficient?
Modbus-RTU added to the Cet Open Toolbox – Highfield Tales
switch - Ethernet Protocols (Modbus TCP/IP & Ethernet/IP) can be in the same network and in a ring topology without problems? - Network Engineering Stack Exchange
MODBUS TCP on optic fiber with M340 - Schneider Electric Community
BASEstartm Classic DAS for Modicon® Programmable Controllers
Comparison of Modbus Over TCP/IP and Profinet - Technical Articles