DE19513880C2 - Connectors - Google Patents

Abstract

The plug connector has a number of contact elements accessible from a connector side and a number of conducting rails which connect groups of the contact elements on the other side. The contact elements are socket elements (13-15) arranged in several rows, of which some (13,14) are arranged in a first group of holders (33,34) and some in a second holder (35). The first group of holders are designed for direct connection to a number of multiple pole plugs (61). The second holder is designed to hold a single adapter element (71). The sockets are arranged in three parallel rows in the first group of holders, with each three adjacent sockets connected by a conducting rail.

Description

The invention relates to a multi-pin connector for Potential distribution, with a plurality of contact elements, which are accessible from a connection side, and with an to Number of conductor rails, one on each opposite side Connect a subset of the contact elements to each other.

From DE 93 02 091 U1 a multi-pin plug insert is knows, in which a plurality of socket contact elements each via branching conductor rails with a multiple number of Terminals is connected so that the potential of everyone providing plug connection of a multiple number of consumptions can be fed. The production of the clamp connection gene is cumbersome. The branching of the potential in each case a connector to a multiple number of Klemman conclusions do not meet all practical requirements.

It is already provided for this connector, bridge cone insert clock elements between two conductor rails, to increase the number of assignments of a plug contact. The number of usable plug contact connections with difference Lich potential is reduced accordingly, if the poss use of the bridge connection is made.

US 3,349,363 shows an adapter on a first side a plug connection option for a three-pin socket and two connectors on a second connection side has options for each two-pin connector. Here are  two of the first three poles each with one of the first Contacts on the two-pin connectors and the third of the first Poles mentioned with the second contacts on the two poles connected connections. The purpose is to implement it a power supply from a network with two phases and a neutral and a first higher voltage between the with two phases on two connection options for consumers a second lower voltage.

US 3 263 203 relates to a connector, in each case a socket on a first connection side with two sockets a second connection side conductively connected, in particular are integrally formed. All contact elements are here of the sockets mentioned mutually identical educated.

Proceeding from this, the present invention has the object to create a multi-pin connector in which the desired connections for potential distribution using Plug contacts can be made. Here also the Possibility of plug connection with mating connectors different Chen type - pin contacts or socket contacts - who covered the. Connections of the plug contacts should be made in groups be adjustable.

The solution to this is that the contact elements in are arranged in several rows of socket contact elements which part in first recesses and part in one second recess are arranged, and that the first recess direct connection to a plurality of each because multipole plugs are formed and that the second Recess, however, larger and to accommodate an individual Adapter element is formed.  

This provides a connector, in particular in the field of rail vehicle cabling but also in ma engineering and plant engineering cabling the entire cabling can significantly simplify by using this only Plug connections is shown. Instead of diverse types locking systems with crimp, screw, clamp and other connections technology within a cabling system that covers the entire Control technology as well as lighting can now be included uses the connector technology. This will be preferred wise uniform pin and socket contacts in the form of rotation parts used in the connector frame or connector housing just snap into place.

Due to the different design of the first and second Recesses stand for the exit side in the first cutout mungen, d. H. for connecting several consumers on one pot tial, immediate socket contact elements available while for the input side due to the applicability of adapters elements in the second recess the choice between socket cones Clock elements and pin contact elements as connection options consists. This applies both to the simple design Fastened to the wall with a closing cover element on the back where only the connection of the socket contact elements of the first recesses, each with a series of Socket contact elements of the second recess for potential ver division is possible, as well as in the preferred embodiment a supplementary element with further socket contact elements the back, where it can be inserted into a housing wall have to be. Here, the other contacts on the Back can be used as an input and on multiple output contacts, in particular on three output contacts each, ver be shared, being for a group of output contacts again the choice between using socket contact elements or pin contact elements.  

Depending on the type of consumer, one may need to Plug connection of a combination of plus, minus and signal cable easy to manufacture or for a plurality of the same like consumers, for example in the area of lighting, Establish connection at the same potential. For this are in preferred version connector proposed, the connector frame have three three-pin single plugs can, by providing two different plugs frames that are unmistakably coded by the shape and which can be distinguished by different colors NEN, the individual poles of the three-pin single plug each with socket contact elements on conductor rails from differ Lich potential or with socket contact elements on a common conductor rail are connected.

The connection of the socket contact elements with the conductor rails can be done by soldering or riveting.

As the exemplary embodiments show, the variation of Conductor rails also connect four or five sockets contact elements at the same potential possible without the Possibility of using bridge connections. This Possibility arises, whereby - as from the prior art known - but the number of available differences potential is reduced.

For certain previously known, repetitive applications The contact inserts can be used for cabling situations also over the length of the recesses with conductor rails below of different types, where necessary to save. individual through openings not with socket contact elements must be equipped.

Preferred embodiments of the invention are in the sub specified claims to which reference is made here; she  are described and explained below with reference to the drawings tert.

Fig. 1 shows a preferred embodiment of the inven tion in a first embodiment, used in an attachment housing

• a) in cross section
• b) in a longitudinal half-section
• c) in top view
• d) in section according to A and B according to Fig. 1a
• e) in bottom view;

Fig. 2 shows a preferred embodiment of the inven tion in a second embodiment

• a) in cross section
• b) in a longitudinal half-section
• c) in top view
• d) in section according to A according to Fig. 2a
• e) in bottom view;

Fig. 3 shows a preferred embodiment of the inven tion in a third embodiment

• a) in cross section
• b) in a longitudinal half-section
• c) in top view
• d) in section according to A according to Fig. 3a
• e) in bottom view;

Fig. 4 shows a preferred embodiment of the inven tion in a fourth embodiment

• a) in cross section
• b) in a longitudinal half-section
• c) in top view
• d) in section according to A according to Fig. 4a
• e) in bottom view;

Fig. 5 shows a three-pin connector according to Fig. 1a, 1b

• a) in side view
• b) in front view
• c) in bottom view
• d) in longitudinal section with an inserted pin con clock element
• e) in cross-section with an inserted pin con clock element;

Fig. 6 shows a connector receptacle for three three-pin single connector according to FIG. 5 in a first embodiment

• a) in vertical section
• b) in top view;

Fig. 7 shows a connector receptacle for three three-pin single connector according to FIG. 5 in a second embodiment

• a) in vertical section
• b) in top view;

Fig. 8 shows a housing of a nine-pin single plug

• a) in vertical section
• b) in top view;

Fig. 9 shows a single-pole single plug for ground contact

• a) in vertical section
• b) in top view;

Fig. 10 shows a contact pin

• a) in vertical section
• b) in a vertical view.

Figs. 1 to 4 are described together below, as far as the display and the items correspond. The differences in the versions are then dealt with.

A rectangular connector 11 consists essentially of a first plate-shaped element 21 and a second plat-shaped element 22 , which lie parallel to one another with substantially flat surfaces, and a supplementary element 23 , 24 , 25 , which has different shapes in the various embodiments.

The first plate-shaped element 21 has a greater thickness and has the following details. A plurality of parallel stepped bores 37 , 38 , 39 , in which socket contact elements 13 , 14 , 15 are inserted; two first recesses 33 , 34 , which are designed symmetrically to one another and run parallel along two edges, a larger second recess 35 , which extends between the recesses 33 and 34 in the middle and parallel to these; two rows of insertion openings 36 for Brückenkon clock elements, which are designed as through openings. The bores 37 , 38 , 39 and thus the socket contact elements are each arranged in three groups starting from the recesses 33 , 34 , 35 and arranged according to a square grid of 3 × 12 units. Within the recesses Formausneh 40 , 41 , 42 are each assigned to a field of 3 × 3 holes in groups of three. The corresponding edge of the first recesses 33 , 34 has an undercut 43 between each of the shape recesses 41 , 42 .

The second plate-shaped element 22 has recesses 51 , 53 on the upper side with conductor rails 52 , 54 inserted therein.

Furthermore, it has a central opening 55 approximately in registration with the recess 35 in the first plate-shaped element 21 . Two rows of counterbores 56 for bridging contact elements are aligned with the corresponding openings 36 in the first plate-shaped element 21 . In the opening 55 of the second plate-shaped element 22 , the supplementary element 23 , 24 , 25 is inserted. The plate-shaped elements 21 , 22 can preferably be screwed or glued together. The details described so far form the connector 11 according to the invention.

In Fig. 1a, the following special features can be seen: The conductor rails 52 , 54 are cranked and th with the Buchsenkontaktelemen 13 , 14 of the first two groups of holes 37 , 38 connected. A conductor rail 57 is directly connected to the socket contact elements 15 of the third group of holes 39 .

In the openings 36 and 56 contact bridge elements 91 are inserted, the details of which will be described later with reference to FIG. 10.

In the recess 55 , a supplementary element 23 is inserted, which has a group of bores 45 with socket contacts 16 in the same arrangement as the group of bores 39 in the second plate-shaped element 22 . The respective outer ones of the socket contact elements 16 are conductively connected to the conductor rails 52 , 54 . The middle of the socket contact elements 16 are conductively connected to the conductor rails 57 .

The socket contact elements 16 of the supplementary part 23 are connected in a plug connection to an adapter contact insert 111 , which has continuous pin contact elements 112 .

As can be seen in Fig. 1b, the middle of these Stiftkon contact elements 112 are cranked to create a transition from the contact image according to FIG. 1c to a contact image according to FIG. 1e. The latter contact picture of a 35-pin connector corresponds to an operating standard of the applicant HTS-Elektrotechnik GmbH. The adapter contact insert 111 is inserted into an attachment housing 113 , which is attached to a control cabinet wall 121 . About spacers 122 , the connector 11 is fixed at a corresponding distance from the housing wall 121 , so that a secure plug connection is achieved with the additional part 23 directly in contact with the adapter insert 111 .

As can be seen in Fig. 1b, the plate-shaped elements 21, 22 are connected by screws 26 to each other, while the complementary element 23 is fixed by screws 27 on the second element 22 plattenförmi gen. The plug connector 11 as a whole is fastened to the control cabinet wall 121 by means of screws 28 . The cranked, by half a hole spaced pin contact elements 112 of the middle row are visible in detail. A bore 39 in the second plate-shaped element 22 can remain unoccupied.

The two rows of recesses 36 for the bridge contact elements can be seen in FIG. 1c; In Fig. 1d their continuation through the countersinks 56 is visible. The offset cutting planes A, B are indicated here. It can be seen that the conductor rails 52 , 53 each connect four socket contact elements to one another and the conductor rails 57 each connect three socket contact elements. The respective last conductor rails 52 , 54 can be cranked due to the absence of a conductor rail 57 there. The conductor rails each show lateral outbreaks 58 , into which the contact bridge elements 91 are inserted and which in cross section make the conductor rails appear to be uninterrupted, but which - as can be seen here - does not apply.

In Fig. 1e, the adapter contact insert 111 is in its special ren shape and the add-on housing 113 with the known A details. The underside of the connector 11 can be seen, since the control cabinet wall is not shown in FIGS. 1c to 1e.

The following individual units are visible only in FIGS . 1a and 1b: plug frames 61 of a first type, which are oriented in mirror image, are inserted into the recesses 33 , 34 and are described in more detail below with reference to FIGS . 6 and 7. The connector frame 61 have locking lugs which engage in the undercut extension 43 of the recesses 33 , 34 . A holding frame insert 71 is inserted into the recess 35 and in turn has a recess 72 which corresponds to the recesses 33 , 34 . This also has an undercut 73 in the manner of the undercut 43 . A plug frame 61 of a second type is also inserted into the recess 72 . These Stec kerrahmen 61 have locking lugs which engage in the undercut 73 . The connector frame 61 are designed to accommodate three pole single connectors, which will be discussed later in connection with FIG. 5 again.

A first three-pole single plug 81 is shown in the middle in FIG. 1a in a longitudinal section through its three pin contact elements 82 . Three such three-pin single connector 81 are shown in Fig. 1a right parallel to each other in cross section through a pin contact element 82 shown. On the pin contact elements 82 cables 83 are crimped. The pin contact elements 82 are each positively locked in Durchgangsöff openings 84 in the three-pin single plugs 81 .

In FIGS. 2a-e, the same parts as in FIGS . 1a-e are provided with the same reference numbers. To this extent, reference is made to the description. Deviating from the supplementary element 23 , a differently designed supplementary element 24 is provided, which has a recess 46 on the outside with an undercut 47 for receiving further plug frames 61 . Further socket contact elements 16 are located in the complementary element 24 in stepped parallel through bores 48 . The conductor rails 52 , 54 in the element 27 are extended so that they are additionally conductively connected to the respective outer socket contact elements in the middle group of socket contact elements 15 . The respective middle socket contact element of this middle group of socket contact elements 15 extends in one piece with the respective middle socket contact element 16 continuously from the second plate-shaped element 22 to the supplementary element 24 . There is no central conductor rail. It goes without saying that the different design of the supplementary elements 24 on the outside, on the one hand, and the different design and conductive connection of the conductor rails and the socket contact elements, on the other, each represent two mutually independent modifications of two with different details, in comparison with FIG. 1, so that a cross-over combination with the designs according to FIG. 1 is possible.

In Fig. 2e, the deviating image of the supplementary element 24 with the recess 46 and the bores 48 , which corresponds to the recesses 33 , 34 and 71 , can be seen.

In FIGS . 3a-e, the same parts as in FIGS . 1a-e are provided with the same reference numbers. To this extent, reference is made to the description. Instead of the holding frame insert 71 , a second adapter contact insert 141 with all features of the type 111 already mentioned in FIG. 1 is inserted into the central recess 35 . The adapter contact insert 141 , however, differs from the adapter contact insert 111 fastening flanges 142 . In the same way, the complementary element 23 , as described in FIG. 1, is supplemented by such an adapter contact insert 111 inserted into an attachment housing 113 and having cranked pin contact elements 112 .

Correspondingly, the contact diagrams of a 35-pin connector with an offset middle row can be seen in FIGS. 3c and 3e in accordance with the operating standard of the applicant HTS-Elektrotechnik GmbH.

In FIGS. 4a-e, the same parts as in FIGS . 2a-e are provided with the same reference numbers. To this extent, reference is made to the description. In the recess 55 of the second ele element 22 , a cover member 25 is inserted so that there is no possibility of plug connection from the second side. Here, conductor rails 52 , 54 are used, each of which connects the socket contact elements 13 , 14 in the first and second groups of bores 37 , 38 to the outer socket contact elements 15 in each of the middle bores 39 . In addition, there are middle conductor rails 59 of a second type, each of which connects three socket contacts 15 lying one behind the other in the direction of the recesses.

In Fig. 4b shows a single connector 151 is seen, which in its outer shape corresponds to the plug frame 61 but receives only an average, in particular reinforced pin contact insert 157 and forms a ground terminal.

As can be seen in FIG. 4d, this is connected via a contact rail 158 to 18 socket contact elements 13 , 14 of the groups of bores 37 , 38 . It can also be seen in Fig. 4d that instead of the third conductor rail 59 and extended Lei terschienen 159 , 160 can be used for connecting five sockets contact elements.

In Fig. 5, a three pin connector 81 is shown with the already with reference to FIG. 1a details described. The plug comprises an upper, wider grip and stop part 85 and an insertion section 86 of reduced cross-section. The insertion section 86 is limited at one end by an outer contour 87 in the form of an arch wall and at the other end by an outer contour 88 in the form of a straight wall. With adapted Ausgestal device of the connector frame, a connector is only possible in a certain orientation. If the assignment of the three-pin single connector always follows the same scheme, for example two signal lines to the round end, one ground line to the blunt end, incorrect connections can be excluded.

In Fig. 6, a connector frame 61 a device is shown in a first embodiment. This shows the latch 62 already mentioned, which is resilient due to the small wall thickness. There are still nine bottom holes 63 visible in the square grid, as well as molded projections 64 , 65 , 66 , which complement each other with the recesses 40 , 41 , 42 in the recesses 37 , 38 , 71 , 46 so that only one assembly in a clear manner Orientation and in given positions is possible. Par allel to the outer walls without molded projections run three recesses 67 for receiving a previously described three-pin connector, which are separated by partitions 68 .

In Fig. 7, a connector frame 61 b of a second type is Darge, on which the details already described in Fig. 6 are denoted by the same numbers and are also recognizable. In the vertical section shown above, the intermediate walls 68 are visible, which are located between the openings 67 . The openings 67 are arranged parallel to the walls with the molded projections 64 , 65 , 66 , that is, perpendicular to the aforementioned recesses according to FIG. 6.

In FIG. 8, a connector housing is shown 161 with nine arranged in square grids through holes 163 having the same outer shape as the connector frame 61, so that on opposite sides arranged in the form of projections 164, 165, 166 and a latching lug 162nd

In Fig. 9, the single plug 151 is shown in FIG. 4b in a 90 ° rotated position in vertical section and in plan view, the locking lug 152 , the outer molded projections 154 , 155 , 156 and the pin contact element 157 inserted into the through hole 153 are recognizable .

In Fig. 10, a bridge contact pin 91 can be seen in a view and a section, which consists of a substantially U-shaped conductor bracket 92 and an insulating handle 93 . The legs of the U-shaped conductor bracket 92 are longitudinally slotted and notched on the outside, so that they can snap into place laterally at the level of the conductor rail.

After the described 35/36 pin connectors can be after the same principle also plugs with a larger number of Contact elements, for example with 46 contact elements leads.

Reference list

11

Connectors

12th

13

Socket contact elements, first

14

Socket contact elements, second

15

Socket contact elements, third

16

Socket contact elements

21

first plate-shaped element

22

second plate-shaped element

23

Complementary element

24th

Complementary element

25th

Cover element

26

Screws

27

Screws

28

Screws

29

Recess

31

drilling

32

33

Recess, first

34

Recess, first

35

Recess, second

36

Through opening

37

Holes

38

Holes

39

Holes

40

Mold recess

41

Mold recess

42

Mold recess

43

Undercut

44

Undercut

45

Through hole

46

Recess

47

Undercut

51

Recess

52

Conductor rail

53

Recess

54

Conductor rail

55

Recess

56

Countersink

57

Conductor rail

58

outbreak

59

Conductor rail

61

Connector frame

62

Latch

63

Bottom hole

64

Form lead

65

Form lead

66

Form lead

67

slot

68

Partition

71

Holding frame insert

72

Recess

73

Undercut

81

Single plug (three-pin)

82

Pin contact element

83

electric wire

84

Through opening

85

Handle part

86

Insert

87

Outer contour (rounding)

88

Outer contour (straight wall)

91

Contact bridge element

92

Bridge contact

93

Handle part

111

Adapter contact insert

112

Pin contact element

113

Extension housing

121

Control cabinet wall

122

Spacer

131

Recess

141

Adapter contact insert

142

Pin contact element

143

flange

151

Single connector (single-pole)

152

Latch

153

Through opening

154

Form lead

155

Form lead

156

Form lead

157

Pin contact element

158

Conductor rail

159

Conductor rail

160

Conductor rail

161

Connector housing

162

Latch

163

Through hole

164

Form lead

165

Form lead

166

Form lead

Claims (17)

1. Multi-pole connector ( 11 ) for potential distribution, with a plurality of contact elements that are accessible from a connection side, and with a number of conductor rails that conductively connect a part of the contact elements to one another on the opposite side, characterized in that
that the contact elements are socket contacts ( 13 , 14 , 15 ) arranged in several rows, of which a part ( 13 , 14 ) are arranged in first recesses ( 33 , 34 ) and a part ( 15 ) in a second recess ( 35 ), and that the first recesses ( 33 , 34 ) are designed for direct connection to a plurality of multipolar plugs and
that the second recess ( 35 ) leads out larger and is designed to receive a single adapter element. 2. Connector according to claim 1, characterized in that the socket contact elements ( 13 , 14 ) in the first recesses ( 33 , 34 ) are each arranged in three parallel rows and at least each of the three adjacent socket contacts in the rows ( 13 , 14th ) are conductively connected to one another by a conductor rail ( 52 , 54 ). 3. Connector according to claim 2, characterized in that the socket contact elements ( 15 ) in the second recess ( 35 ) are arranged in three parallel rows and each of the three adjacent book contact elements in the rows ( 15 ) of a conductor rail ( 57 ) with be connected to each other in a conductive manner. 4. Connector according to claim 2, characterized in that the socket contact elements ( 15 ) in the second recess ( 35 ) are arranged in three parallel rows and the socket contact elements of the outer rows each with the conductor rail ( 52 , 54 ) to the first recesses ( 33 , 34 ) belonging socket contact elements ( 13 , 14 ) are connected and the socket contact elements of the middle row are each isolated from them. 5. Connector according to one of claims 1 to 4, characterized in that on the opposite side to the recesses ( 33 , 34 , 35 ) further socket contact elements ( 16 ) are arranged in several rows, each of which in the rows of adjacent socket contact elements with conductors ( 52 , 54 , 57 ) which are different from one another and optionally with individual socket contact elements in the second recess ( 35 ). 6. Connector according to one of claims 1 to 5, characterized in that it has a first plate-shaped element ( 21 ) with zuein other parallel bores ( 37 , 38 , 39 ) into which the socket contact elements ( 13 , 14 , 15 ) are inserted and which comprises the first recesses ( 33 , 34 ) and the second recess ( 35 ) in a mutually parallel arrangement, that it comprises a second plate-shaped element ( 22 ) which lies flat against the first and in the adjacent surface recesses ( 51 , 53 ) in which the conductor rails ( 52 , 54 ) lie, and which has a recess ( 55 ) lying in register with the second recess ( 35 ) of the first plate-shaped element ( 21 ), and that into the recess ( 55 ) of the second plate-shaped element ( 22 ), a supplementary element ( 23 , 24 ) with the further socket contacts ( 16 ) or a cover element ( 25 ) is inserted. 7. Connector according to one of claims 1 to 6, characterized in that in the second recess ( 35 ) a holding frame insert ( 71 ) is inserted, in which a gene with the first recesses ( 33 , 34 ) matching recess ( 72 ) for immediate cash connection is formed with a plurality of multipolar plugs. 8. Connector according to one of claims 1 to 7, characterized in that in the second recess ( 35 ) an adapter contact insert ( 141 ) is used, which has three rows of pin contact elements ( 142 ) on both opposite sides, the pin contact elements ( 142 ) of the middle row are offset by half a pin spacing, so that a multipole plug with staggered rows, in particular a 35-pin plug, is formed on the outside. 9. Connector according to one of claims 6 to 8, characterized in that the supplementary element ( 23 ) in the recess ( 55 ) of the second plate-shaped element ( 22 ) arranged in several rows in parallel through holes ( 45 ) lying socket contact elements ( 16 ), which are arranged in particular in accordance with the socket contact elements ( 15 ) in the second recess ( 35 ). 10. Connector according to one of claims 6 to 8, characterized in that the supplementary element ( 24 ) in the recess of the two th plate-shaped element ( 22 ) on the outside with the first recesses ( 33 , 34 ) matching recess ( 46 ) is designed for direct connection to a plurality of multipolar plugs ( 61 ) in the same way as the first recesses ( 33 , 34 ) and has socket contact elements ( 16 ) arranged in three rows therein and located in parallel bores ( 45 ). 11. Connector according to claim 10, characterized in that in the sockets ( 16 ) an adapter contact insert ( 111 ) is inserted, the clock elements arranged in three rows Stiftkon ( 112 ) on both opposite sides, the pin contact elements of the middle row by half Pin spacing are cranked, so that a multipole connector with staggered rows, in particular a 35-pin connector, is formed on its outside. 12. Multi-pin connector for insertion into the first Ausnehmun gene of a connector according to one of claims 1 to 11, characterized in that it consists of a connector frame ( 61 ) with three mutually parallel recesses ( 67 ) and three three-pin individual plugs inserted into the recesses ( 81 ) consists. 13. Plug according to claim 12, characterized in that the recesses ( 67 ) in the plug frame ( 61 ) and the outer contours ( 87 , 88 ) of the individual plug ( 81 ) have form-fitting means which are fitted to one another and seat the individual plug ( 81 ) in the plug frame ( 61 ) only in a given orientation. 14. Three-pin plug for insertion into the first recesses of a connector according to one of claims 1 to 11, characterized in that the plug ( 151 , 161 ) is integrally formed. 15. Plug combination of a connector according to one of claims 1 to 11 and a multi-pin connector according to one of claims 12 to 13, characterized in that in the first recesses ( 33 , 34 ) and on the plug frame men ( 61 ) are mutually adapted mold engagement means vorgese hen , so that the multi-pin connector can only be used in a defined orientation and in predetermined, clearly different positions from one another in the first recesses ( 33 , 34 ) of the contact insert. 16. Plug combination according to claim 15, characterized in that the longitudinal extent of the recesses ( 67 ) in the plug frame ( 61 ) perpendicular to the longitudinal extent of the first recesses ( 33 , 34 ), so that the three pin contact elements ( 82 ) of the individual plug ( 81 ) three in the three rows adjacent to each other socket contact elements ( 13 , 14 ) are assigned, ie are at the same potential. 17. Plug combination according to claim 15, characterized in that the longitudinal extent of the recesses ( 67 ) in the plug frame ( 61 ) runs parallel to the longitudinal extent of the first recesses ( 33 , 34 ), so that the three Stiftkon contact elements ( 82 ) of the individual plug ( 81 ) are connected to three socket contact elements ( 13 , 14 ) lying in a row, that is to say they are generally at different potentials.