Utilizing an external serial device server, RUG3, RUG5 and RUG9 RTUs can achieve Ethernet connectivity. Even with an external serial device server RUGID RTUs remain very cost competitive. And rest assured, there's no need to figure out how to use another piece of equipement, we've already done the work for you. Check out the links below.

Sena HelloDevice Ethernet to Serial

Ethernet How-Tos:

All Rugid RTUs can now communicate using Modbus TCP/IP!