Impact 67 I/O Module, Profinet From Murr Elektronik, this Ethernet IMPACT67 I/O Module has A-Coded M12 I/O inputs and an M12 D-coded Fieldbus input. The splitter box has 2 hole screw mounting and is compatible with I/O modules of MVK model range. With a 24 V DC input (EN 61131-2) input, the splitter box is short-circuit and overload protected.