Plug connector module for an industrial plug connector

1. A plug connector module for a modular industrial plug connector having a holding frame, the plug connector module comprising:

at least two independent functional units that are coupleable together to form a combined module unit that is removably receivable in the holding frame, and

wherein a first functional unit and a second functional unit of the at least two independent functional units of the combined module unit include at least one different type of functional element from each other, the first functional unit comprising at least one functional element in the form of an electrical contact element, and the second functional unit comprising at least one functional element in the form of a sensor or an optical contact.

2. The plug connector module as claimed in claim 1 , wherein, for each functional unit, a fastening means is integrally formed on a side wall of the functional unit by which the first functional unit and the second functional unit of the at least two independent functional units of the combined module unit can be reversibly fixed to one another.

3. The plug connector module as claimed in claim 2 , wherein a first fastening means is integrally formed on a side wall of the first functional unit and a second fastening means is integrally formed on a side wall of the second functional unit, wherein the first and the second fastening means are configured in a complementary manner to one another.

4. The plug connector module as claimed in claim 1 , wherein each functional unit has a holder means on a side wall thereof for fixing the plug connector module in the holding frame.

5. The plug connector module as claimed in claim 4 , wherein:

the first functional unit has a first holder means on a side wall and the second functional unit has a second holder means on a side wall, and

the first and second holder means can each enter openings of the holding frame, for fixing the plug connector module in the holding frame.

6. The plug connector module as claimed in claim 5 , wherein the first and the second holder means have a different geometry.

7. The plug connector module as claimed in claim 1 , wherein the plug connector module has a shielding element for electromagnetic shielding, and wherein the shielding element is arranged between two adjacent functional units of the at least two independent functional units.

8. The plug connector module as claimed in claim 1 , wherein the plug connector module has a strain-relief element.

9. A method for fitting a holding frame with a plug connector module, the method comprising:

initially combining a first functional unit with at least one second functional unit to form a plug connector module; and

thereafter, inserting the plug connector module into the holding frame,

wherein the first functional unit and the second functional unit include at least one different type of functional element from each other, the first functional unit comprising at least one functional element in the form of an electrical contact element, and the second functional unit comprising at least one functional element in the form of a sensor or an optical contact.

10. The method as claimed in claim 9 , further comprising:

folding open frame halves of the holding frame before the insertion of the plug connector module into the holding frame between the frame halves;

arranging the plug connector module such that holder means of the plug connector module are aligned with openings provided in the frame halves during the insertion; and

folding the frame halves together, as a result of which the holder means enter the openings completely and interlocking holding of the plug connector module in the holding frame is thereby produced.

11. The method as claimed in claim 9 , wherein:

the combining is repeated n times and the inserting is repeated m times, wherein n and m are natural numbers and the number n is less than or equal to the number m, as a result of which the holding frame is fitted with similar and/or different plug connector modules one after the other.