Allytech Serial RS232 4.3Ft 1.3M Male to Female DB9 9 Pin Extension Serial Cable for Computer PC Fully shielded to prevent unwanted EMI/RFI interference. PLC program download, monitor communication line. Fully molded connectors with thumbscrew provide you with a quick and easy connection. Support serial printer, mouse, modem, switch, video splitter, mono & multisync video applications. All 9 connector pins are wired straight through. Pin-Out: 1-1 / 2-2 / 3-3 / 4-4 / 5-5 / 6-6 / 7-7 / 8-8 / 9-9 / G-G