D-SUB connector - 9-pos. female connector - two cable entries < 35° - bus system: Modbus - Modbus Plus - BITBUS - ARCNET - MULT/MININET (B&R) - SYSTEM 2003 (B&R) - P-NET - pin assignment: 1 - 2 - 3 - 5 - 6 - 8; screw connection terminal blocks