http://www.ebay.com/i/Tripp-Lite-DB9-RJ45-Modular-Serial-Adapter-F-F-RS-232-RS-422-RS-485-/292409234182

Tripp Lite DB9 to RJ45 Modular Serial Adapter F/F RS-232 RS-422 RS-485

Regular price $12.10 $12.00 Sale


This saves you time and money by eliminating the need to upgrade your existing hardware.The adapter features a female DB9 serial connector with color-coded twisted-pair wires on one side and an RJ45 female connector on the other, allowing you to create customized RS-232, RS-422 and RS-485 connections.