Converter assembly comprising a connection part and a connected cover part mounted thereon, in particular a cover part connected with a high protection rating, wherein the cover part has a first plug-in connector part for connecting a data bus line, in particular for connecting a corresponding mating plug-in connector part assembled on an end region of a data bus line, wherein the connection part has at least one connection device for at least one supply line, in particular a three-phase line, wherein a first female connector part for connecting a data bus line, in particular for connecting a corresponding male connector part assembled on an end region of a data bus line, is arranged in the connection part, wherein the contacts of the first female connector part are electrically connected, in particular by means of conducting tracks of a printed circuit board, to contacts of a third plug-in connector part that is plug-connected to a corresponding mating plug-in connector part such that the contacts are electrically connected to a first input of a changeover switch of an electronic circuit arranged in the cover part, wherein the contacts of the first plug-in connector part are electrically connected to a second input of the changeover switch, wherein the output of the changeover switch is electrically connected to either the first input or the second input depending on the switching state of the converter, in particular wherein the output is connected to a part of the electronic circuit that is configured as a bus subscriber, wherein a T-node for the data bus line is present in the cover part, wherein a T-node for the supply line, in particular the three-phase line, is present in the connection part, as is a T-node for a data bus line, wherein, by means of the changeover switch, either the T-node of the cover part or the T-node for the data bus line of the connection part is electrically connected to the part of the electronic circuit configured as the bus subscriber. comprising a connection part and a connected cover part mounted thereon, in particular a cover part connected with a high protection rating, wherein the cover part has a first plug-in connector part for connecting a data bus line, in particular for connecting a corresponding mating plug-in connector part assembled on an end region of a data bus line, wherein the connection part has at least one connection device for at least one supply line, in particular a three-phase line, wherein a first female connector part for connecting a data bus line, in particular for connecting a corresponding male connector part assembled on an end region of a data bus line, is arranged in the connection part, wherein the contacts of the first female connector part are electrically connected, in particular by means of conducting tracks of a printed circuit board, to contacts of a third plug-in connector part that is plug-connected to a corresponding mating plug-in connector part such that the contacts are electrically connected to a first input of a changeover switch of an electronic circuit arranged in the cover part, wherein the contacts of the first plug-in connector part are electrically connected to a second input of the changeover switch, wherein the output of the changeover switch is electrically connected to either the first input or the second input depending on the switching state of the converter, in particular wherein the output is connected to a part of the electronic circuit that is configured as a bus subscriber, wherein a T-node for the data bus line is present in the cover part, wherein a T-node for the supply line, in particular the three-phase line, is present in the connection part, as is a T-node for a data bus line, wherein, by means of the changeover switch, either the T-node of the cover part or the T-node for the data bus line of the connection part is electrically connected to the part of the electronic circuit configured as the bus subscriber.