Passive interfaces for signal transmission on a SubD connector equipped with a clamping-yoke connection in accordance with IEC 807-2 / DIN 41652. The main features include: • Group with 9-, 15-, 37- and 50-pole male and female connectors. • One-to-one electrical connection between controller and field connections. • Extremely compact modules in RS 45 section for installation on standard TS35 mounting rail. • Pin for the earth connection.