http://tinyurl.com/nblg4ml
TCP/IP Ethernet to Serial RS232 RS485 RS422 Converter
RS-232/422/485 3-in-1 serial interface 300-230.4KBPS baud rate
Support 2, 4 wire RS-485
All serial ports have built in 600W lightning protection
10/100M Ethernet, auto detect straight/cross cable
Support protocols like TCP/IP, UDP, DHCP