Profibus D Sub Internal Cable Clamp These I-Net Profibus bus connectors with internal cable clamp are suitable for cables 8-9 mm diameter. There are three types of body configuration of the internal cable clamp I-Net Profibus bus connectors: Standard, Compact and Special with Body Orientations of 90°, 90° and 55° respectively. The I-Net Profibus bus connectors are available in two versions, namely, Standard with one male 'D' port connector and PG with two, male and female, 'D' port connectors for monitoring, see table.