9−pin D−sub (F) to 3−pin Adapter Cable Kramer’s D9F/3PM cable converts Kramer RC controllers with an RS−232 port on a terminal block (such as the RC−2) to a standard 9−pin D−sub connector. HighQuality Construction Data cable with an assembled 9−pin D−sub female connector at one end and a molded 3−pin header at the other. Standard 0.6ft (0.18m) Length.