Plug-in connector and a plug-in module system

1. A plug-in connector having a first contact casing with a first receptacle and a second contact casing with a second receptacle, the first receptacle receiving a socket contact and the second receptacle receiving a plug contact, wherein the first receptacle and the second receptacle are formed identically;

wherein the receptacles in each case have an opening, the opening having a funnel-shaped region which is oriented on the inside towards the socket contact or towards the plug contact, and

wherein a sleeve of the socket contact or of the plug contact has a conical region which is associated with the funnel-shaped region.

2. A plug-in connector according to claim 1 , wherein the first and second receptacles each have a recess which is provided to receive a latch arm of the corresponding socket contact and plug contact.

3. A plug-in connector according to claim 1 , wherein the opening has a further funnel-shaped region on the outside on the contact casing.

4. A plug-in connector according to claim 1 , wherein the first contact casing and the second contact casing are formed substantially identically.

5. A plug-in connector according to claim 1 , wherein one of the contact casings has on an outer peripheral surface at least one first groove which is designed to receive a protrusion of a casing holder.

6. A plug-in connector according to claim 5 , wherein the casing holder engages at least partially around the first or the second contact casing, and the casing holder is designed to connect the first or the second contact casing to a connector casing.

7. A plug-in connector according to claim 6 , wherein the casing holder has a latching means on a periphery designed to engage in a latch receptacle of the connector casing.

8. A plug-in connector according to claim 6 , wherein the casing holder has a coding rib which is designed to engage in a coding recess of the connector casing.

9. A plug-in module system with a plug-in connector in particular according to claim 1 and a first casing holder, the first casing holder being connected to the first contact casing of the plug-in connector, wherein the first casing holder is designed to fasten the first contact casing to a connector casing and means are provided for fastening the second contact casing to the connector casing.

10. A plug-in module system according to claim 9 , wherein the casing holder partially encompasses the contact casing, and the contact casing being connected to the casing holder by means of a connection.

11. A plug-in module system according to claim 10 , wherein the connection or the means comprise one from a group including a tongue-and-groove connection and at least one compression rib and a latching means.

12. A plug-in module system according to claim 9 , wherein the first casing holder has on a periphery a latch spring which is designed to engage in a recess of the connector casing and to connect the casing holder to the connector casing.

13. A plug-in module system according to claim 9 , wherein the casing holder has at least one coding rib which engages in a coding recess of the connector casing and specifies the orientation of the casing holder relative to the connector casing.

14. A plug-in module system according to claim 9 , wherein the first contact casing is formed identically to a second contact casing.

15. A plug-in connector having a first contact casing with a first receptacle and a second contact casing with a second receptacle, the first receptacle being designed to receive a socket contact and the second receptacle being designed to receive receiving a plug contact, wherein the first receptacle and the second receptacle are formed identically, wherein the contact casing has on an outer peripheral surface at least one first groove which is designed to receive a protrusion of a casing holder.

16. A plug-in connector according to claim 15 , wherein the casing holder engages at least partially around the first or the second contact casing, and the casing holder is designed to connect the first or the second contact casing to a connector casing.

17. A plug-in connector according to claim 16 , wherein the casing holder has a latching means on its periphery which is designed to engage in a latch receptacle of the connector casing.

18. A plug-in connector according to claim 16 , wherein the casing holder has a coding rib which is designed to engage in a coding recess of the connector casing.

19. A plug-in module system, comprising:

a plug-in connector having a first contact casing with a first receptacle and a second contact casing with a second receptacle, the first receptacle being designed to receive a socket contact and the second receptacle being designed to receive a plug contact, wherein the first receptacle and the second receptacle are formed identically, and;

a first casing holder, the first casing holder being connected to the first contact casing of the plug-in connector, wherein the first casing holder is designed to fasten the first contact casing to a connector casing and means are provided for fastening the second contact casing to the connector casing.

20. A plug-in module system according to claim 19 , wherein the casing holder partially encompasses the contact casing, and the contact casing being connected to the casing holder by means of a connection.

21. A plug-in module system according to claim 19 , wherein the connection and/or the means have a tongue-and-groove connection and/or at least one compression rib and/or a latching means.

22. A plug-in module system according to claim 19 , wherein the first casing holder has on its periphery a latch spring which is designed to engage in a recess of the connector casing and to connect the casing holder to the connector casing.

23. A plug-in module system according to claim 19 , wherein the casing holder has at least one coding rib which engages in a coding recess of the connector casing and specifies the orientation of the casing holder relative to the connector casing.

24. A plug-in module system according to claim 19 , wherein the first contact casing is formed identically to the second contact casing.