Nport-5100 - 1-port RS-232/422/485 serial device servers.
Moxa
1-port RS-232/422/485 serial device servers.
As the vast majority of legacy machinery, equipment, and field devices still use a variety of standard and proprietary serial communication protocols, you may need a serial device server or protocol gateway in order for an Ethernet-based system to communicate with these legacy serial devices.
1-port RS-232/422/485 serial device servers.
2-port RS-232/422/485 serial device servers.
2-port RS-232/422/485 serial device servers.
4-port RS-232/422/485 serial device servers.
1-port RS-232/422/485 PoE serial device servers.