Be aware that some RS485 to Ethernet converters do not work because they do not consider timing of the Modbus specification. Some units that have a special Modbus mode accomodate the timing issues and work very well. For a supplier listing of various Modbus Equipment, try visiting and searching the www.modbus.org website. Acromag has tested and verified the operation of the Din Rail mounted “Digi One IA RealPort” Device made by Digi International (North America p/n 70001777, International p/n 7O001777). For website support, try visiting www.digi.com . For email support, try the address firstname.lastname@example.org.