cable branch device

Abstract

The invention relates to a cable branching device (10) for electrically connecting three data transmission cables (11, 21, 31), each having a cable shield (16) surrounding a conductor (12, 12'), wherein the first conductor (12) of the first data transmission cable (11) is electrically connected to the first conductor (22, 32) of the second and third data transmission cables (21, 31), with a connector unit (40) and three cable receiving units (105, 106, 107), wherein the connector unit (40) comprises a connector housing (41), a connection unit (90) with a printed circuit board (91) on which conductor connection elements (101, 101', 102, 102', 103, 103') are arranged, as well as an insulating unit (70) surrounding the printed circuit board (91) and a shielding element (60), wherein the first The conductors (12, 22, 32) and the second conductors (12', 22', 32') are connected via the circuit board (91), wherein the cable receiving unit (105, 106, 107) is detachably connectable to the connector unit (40).To realize a simple electrical connection between the cable shields with improved shielding, it is proposed that the shielding element (60) has a contact component (65) at each of its three end regions (62, 63, 64) for electrical connection with the cable shield (16) of the data transmission cable (11, 21, 31), wherein the shielding element (60) is electrically connected to the connector housing (41) of the connector unit (40).

Description

[0001] The invention relates to a cable branching device for electrically connecting three data transmission cables, which have a cable shield surrounding a conductor, wherein a first conductor of the first data transmission cable is connected to the first conductor of the second and third data transmission cables, with a connector unit and three cable receiving units according to the preamble of claim 1.

[0002] Cable branch connectors are used particularly in telecommunications and data transmission technology. They serve to electrically connect at least three data transmission cables without the need for connectors. In building cabling, there is a regular need to modify the infrastructure, for example, by adding additional devices within an existing main cable, which consequently requires splitting or rerouting existing data transmission cables. To integrate additional devices, the main cable is first cut at the desired location. Suitable connectors can then be attached to the two free end sections of the cut main cable.Similarly, the end face of a third data transmission cable for the additional device, defined as a spur or branch line, is fitted with a suitable connector. Connecting the three connectors with complementary mating connectors, such as a junction box, finally enables the electrical connection of the main cable to the spur line of the additional device. Such a cable branching device is known, for example, from WO 2021 252 938 A1. The use of generic cable branching devices that do not require connectors proves to be significantly more cost-effective.

[0003] To protect against external interference signals, cable branch devices of this type and the associated data transmission cables have suitable shielding elements known to those skilled in the art.

[0004] Each data transmission cable to be connected using the cable branching device has one or more conductors. Each conductor consists of an electrical conductor encased in insulation. The data transmission cable can, for example, have two, four, six, or eight conductors, with each pair of conductors being twisted together to form a conductor pair. To protect the conductor pairs against crosstalk from adjacent conductor pairs, each conductor pair can be surrounded by a pair shield, which can be, for example, a conductive foil strip wrapped around a conductor pair.

[0005] The conductors of the data transmission cable are surrounded by a cable jacket made of insulating material. Between the cable jacket and the conductor pairs, which are optionally surrounded by a pair shield, a cable shield in the form of a conductive braid is often placed. This cable shield protects the signal current flowing through the conductors of the data transmission cable from interfering radiation that can affect the cable from the outside. Sources of such external interference include, for example, emissions from mobile phones, cell towers, or nearby incompletely shielded or unshielded data transmission equipment such as connectors.

[0006] Additionally, power can be transmitted to connected devices via the conductors of the data transmission cable. The transmittable power depends on the number of conductors in the data transmission cable and the application's standards.

[0007] The EP 4 270 700 A1 reveals in the Fig. 4 A generic cable branching device 2 for connecting three data transmission cables 1a, 1b, each with two conductors 82, 92, comprising a housing base 20 and a removable cover 21 with a first and second main cable access opening 27-1, 27-2 for inserting the main cable 1a to be split and a third secondary cable access opening for inserting the additional secondary cable 1b. A printed circuit board 22 with a total of three pairs of conductor connection elements 24, 25 and three shield contact elements 28 is arranged in the housing base 20, wherein the conductor connection elements are configured as insulation displacement contacts of the conductor connection element pairs 24, 25 and are connected to each other via conductive traces. The three shield contact elements 28 are also electrically connected to each other via conductive traces. Additional compensation circuits 29-1, 29-2, 29-3 for impedance matching within the cable branch device are provided on the circuit board 22.The proposal enables the simple implementation of a generic cable branching device without the use of connectors. The three shield contact elements 28 are disadvantages with regard to cost and the number and size of the shield contact transition resistances.

[0008] From US patent 2022 0 013 932 A1, another cable branching device of this type for connecting three data transmission cables 10, 20, each with two conductors, is known. The cable branching device 100 has a connector housing constructed from two housing halves 110, 120 rotatably mounted relative to each other, wherein the two housing halves 110, 120 are positioned between a position that releases the data transmission cables 10, 20. Fig. 3B and a position defining the data transmission cables 10, 20 after Fig. 3A are rotatably mounted relative to each other. A circuit board 130 is arranged in the housing half-shell 120, on which three pairs of wire connection elements, each consisting of two wire connection elements 111, 112, 113, 114, 121, 122, are provided as insulation displacement connectors for connecting to the two conductors of each data transmission cable 10, 20. A shielding element 131, designed as a conductive metal plate, and two wire holders 115, 116 are arranged in the housing half-shell 110. When the two housing half-shells 110, 120 are closed, the wire holders 115, 116 secure the position of the conductors of the data transmission cable in the wire connection elements accordingly. Fig. 6. The end faces of the split main cable 10 and the branch cable 20 are provided with shielding sleeves 117, 118, 119, which, when the housing halves 110, 120 are closed, establish an electrical connection to the conductive metal plate 131 and thus electrically connect the cable shields of the three data transmission cables 10, 20 to be connected. This proposal enables a simple and robust connection between three data transmission cables without the use of connectors. However, the three shielding sleeves 117, 118, 119 provided at the free ends of the data transmission cables 10, 20 to be connected negatively impact costs and assembly time.

[0009] The object of the present invention is therefore to further develop a generic cable branching device according to the preamble of claim 1 in such a way that it enables a cost-effective and robust electrical connection between the cable shields of three data transmission cables while maintaining the data transmission quality through improved shielding.

[0010] This problem is solved according to the invention in a generic cable branching device with the features from the characterizing element of claim 1.

[0011] In an advantageous embodiment of the invention, the shielding element is made in one piece from a common conductive material. In this way, minimal shield contact resistances are achieved between the cable shields of the data transmission cables to be connected.

[0012] In one embodiment according to the invention, the shielding element consists of a metallically conductive sheet metal material and is manufactured using a stamping and bending tool. This enables cost-effective production of the shielding part.

[0013] It is particularly advantageous if, in an embodiment according to the invention, the shielding element has elastic spring contact elements at its three end regions for electrical connection with the cable shield of the data transmission cable. This eliminates the need for additional connecting elements, such as shield sleeves.

[0014] In an embodiment according to the invention, the conductor connection elements on the circuit board are designed as insulation displacement connectors, which enable a simple and safe electrical connection of the conductors of the data transmission cable to the circuit board.

[0015] In another embodiment according to the invention, the insulating unit consists of an insulating housing and an insulating plate, which enable easy assembly.

[0016] In an embodiment according to the invention, the connector housing and the cable receiving housing consist of a metallic conductive material and, via the connection to the shielding element, form a circumferentially closed shield around the three data transmission cables to be connected for protection against external interference signals.

[0017] In an embodiment according to the invention, a strain relief element is arranged on the cable receiving unit, which allows the data transmission cable to be attached to the cable receiving unit and, in the connected state with the connector unit, protects the contact points of the wire connection elements from unwanted mechanical stresses caused by the connected data transmission cable.

[0018] For example, the strain relief element is arranged on the cable housing of the cable assembly unit such that it is pivotably positioned between an open position (releasing the data transmission cable) and a closed position (locking the data transmission cable). In the open position, allowing the data transmission cable to be inserted into the cable housing without obstruction, the strain relief element can then be pivoted from the position releasing the data transmission cable to the position locking the data transmission cable to the cable housing. Subsequent external forces and moments acting on the data transmission cable thus have no effect on subsequent assembly steps, particularly on the connection of the conductor termination elements to the conductors of the data transmission cable.

[0019] For high-quality data transmission, it is necessary to ensure the most constant possible impedance of the individual components along the entire data transmission path. Within the data transmission cable, this is achieved by twisting two conductors together to form a conductor pair, a technique known to those skilled in the art. The resulting phase shifts between the conductors compensate for interference. Several conductor pairs within a cable exhibit different twisting patterns. The connection point between two data transmission cables interrupts the constant impedance and regularly leads to a deterioration in data transmission quality. This disruption can be compensated for, for example, by appropriately dimensioning the cable branching device.Alternatively, in an embodiment according to the invention, compensation is achieved via a suitable design of the conductor tracks on the circuit board in the form of a compensation circuit.

[0020] In an advantageous embodiment according to the invention, the compensation circuit has capacitive and inductive elements which are generated by suitable designs of the conductor tracks between the wire connection elements.

[0021] It is advantageous to provide suitable mounting points on the housing of the connector unit for securing the cable branch device to a DIN rail. Such DIN rails are commonly found in control cabinets. The cable branch device can be secured using additional fastening elements. Alternatively, the fastening elements can be integrally integrated with the connector housing of the connector unit. Exemplary embodiments are known to those skilled in the art from DE 10 2023 122 398 A1.

[0022] In an alternative design, the cable branch device has mounting components for fixing the cable connection device to a housing wall. These can, for example, be designed as mounting tabs and have through-holes for fixing the cable branch device with screws.

[0023] The following description of advantageous embodiments of the invention serves, in conjunction with the drawing, for further explanation.

[0024] They show: Fig. 1: A perspective view of the cable branching device with connected data transmission cables; Fig. 2: Another perspective view of the cable branching device from Fig. 1. in the style of an exploded view; Fig. 3: a perspective view of the connector unit from Fig. 1. in the style of an exploded view; Fig. 4: A top view of the connector unit Fig. 3; Fig. 5: a sectional view along section line A of the connector unit Fig. 4; Fig. 6: An enlarged view of detail X from Fig. 5; Fig. 7: a sectional view along section line B of the connector unit Fig. 4; Fig. 8: An enlarged view of detail Y from Fig. 7; Fig. 9: A perspective view of the connector housing of the connector unit made of Fig. 3; Fig. 10: Another perspective view of the connector housing of the connector unit from Fig. 9; Fig. 11: a perspective view of the screen element of the connector unit Fig. 3; Fig. 12: another perspective view of the screen element from Fig. 11; Fig. 13: a perspective view of the connection unit from Fig. 3; Fig. 14: another perspective view of the connection unit from Fig. 13; Fig. 15: A perspective view of the insulating housing of the insulating unit of the connector unit made of Fig. 3; Fig. 16: another perspective view of the insulating housing made of Fig. 15; Fig. 17: a perspective view of a cable intake unit made of Fig. 2 in the style of an exploded view; Fig. 18: another perspective view of the cable intake unit from Fig. 17; Fig. 19: another perspective view of the cable intake unit from Fig. 18; Fig. 20: another perspective view of the cable intake unit from Fig. 19; Fig. 21: A perspective view of a cable receptacle with a data transmission cable inserted. Fig. 1;

[0025] In the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17, Fig. 18, Fig. 19, Fig. 20 to Fig. Figure 21 is a first advantageous embodiment of a cable branching device according to the invention for electrically connecting the conductors 12, 12', 22, 22', 32, 32' of three data transmission cables 11, 21, 31, shown schematically and designated overall by reference numeral 10.

[0026] The Fig. 1 and Fig. 2 disclose the cable branching device 10 consisting of a connector unit 40 which can be detachably connected to three cable receiving units 105, 106, 107, wherein a data transmission cable 11, 21, 31 is connected to each cable receiving unit 105, 106, 107.

[0027] According to the Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 the connector unit 40 comprises a connector housing 41, a shielding element 60, an insulating plate 71, a connection unit 90 and an insulating housing 80, wherein the insulating plate 71 and the insulating housing 80 form the insulating unit 70 and surround the connection unit 90.

[0028] The Fig. Figure 3 shows the insulating plate 71 with a T-shaped base element 72, from which the side walls 73 rise to provide a form-fitting connection for the printed circuit board 91. The arc-shaped recesses 74, 75, 76 are penetrated by the complementary domes 84, 85, 86 and the connecting elements 50, 51, 52 during assembly of the connector unit 40. A total of six recesses 77 extend from the T-shaped base element 72 into the material of the base element 72 in the form of blind holes to accommodate the wire connection elements 101, 101', 102, 102', 103, 103', which project beyond the printed circuit board 91. The insulating plate 71 can be designed as an injection-molded part and, for example, made of a polyamide.

[0029] The Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. Figure 8 reveals the sandwich-like structure of the connector unit 40, wherein the insulating plate 71, made of a plastic material, insulates the connection unit 90 with the wire connection elements 101, 101', 102, 102', 103, 103' from the metallic connector housing 41. The end regions of the wire connection elements 101, 101', 102, 102', 103, 103', which project from the circuit board 91 towards the connector housing 41, engage in the corresponding recesses 77 of the insulating plate 71. This is shown in the Fig. Figure 6 is shown particularly clearly. The sandwich-like structure of the connector unit 40 is fixed in the vertical direction by a targeted deformation of the connecting elements 50, 51, 52 into the deformed connecting elements 50', 51', 52' in the sense of riveting. This is evident from the Fig. 8 can be seen. The connection of the connector housing 41 with the insulating housing 80 by means of the deformed connecting elements 50', 51', 52' simultaneously fixes the connection unit 90 in the connector unit 40 in a vertical direction.

[0030] The in the Fig. 9 and Fig. The connector housing 41 shown in Figure 10 has a T-shaped base plate 42 from which the side walls 43 rise. The end walls 44, 46, 48 close off the connector housing 41 at its end faces. Each end wall 44, 46, 48 has a cable opening 45, 47, 49 for the insertion of the data transmission cable 11, 21, 31. Three connecting elements 50, 51, 52 rise from the T-shaped base plate 42 as hollow cylinders, which, when the connector unit 40 is assembled, extend through the designated receiving openings 87 of the insulating housing 80 and, by subsequent deformation into the deformed connecting elements 50', 51', 52', fix the connection unit 90, the shielding element 60, and the insulating unit 70 in the connector housing 41. Guide elements 53 and guide ribs 54, 55, 56, 57, 58 and 59 are provided for the defined positioning of the shield element 60 in the connector housing 41.The connector housing can be designed as a zinc die-cast part.

[0031] The Fig. 11 and Fig. Figure 12 shows the structure of the shielding element 60 with a T-shaped base element 61, at the end faces of which a contact component 65 is provided 62, 63, 64. Each contact component 65 has four contact elements 66 in the form of spring-loaded contact tabs for electrical contacting the shielding element 60 to the cable shield 16 of the data transmission cable 11, 21, 31 to be connected. The three recesses 67 arranged in the T-shaped base element 61 serve to allow the connecting elements 50, 51, 52 to pass through during assembly of the connector unit 40. The shielding element 60 can, for example, be made of brass and be designed as a stamped and bent part.

[0032] According to the Fig. 13 and Fig. The connection unit 90 consists of a printed circuit board 91 with a T-shaped profile 92, on which a total of six wire connection elements 101, 101', 102, 102', 103, 103' are arranged. The wire connection elements 101, 102, 103 serve for the electrical connection with the first wire of the data transmission cable 11, 21, 31 to be connected. The wire connection elements 101', 102', 103' are provided for the electrical connection with the second wire of the data transmission cable 11, 21, 31 to be connected. On the circuit board 91, the conductor tracks 97, 98 are arranged on opposite surfaces for the electrical connection of the wire connection elements 101, 102, 103 and 101', 102', 103', which at their end regions open into metallized receiving openings 93, which serve for receiving and electrical connection with the wire connection elements 101, 101', 102, 102', 103, 103'.The connection between the aforementioned conductor connection elements and the metallized receiving openings 93 can be made, for example, by soldering or by a force-fit connection using a press fit known to those skilled in the art. The design of the conductor connection elements 101, 101', 102, 102', 103, 103' as insulation displacement connectors is known to those skilled in the art. The recesses 94, 95, 96 are penetrated by the domes 84, 85, 86 of the insulating housing 80 during assembly of the connector unit 40.

[0033] A targeted design of the conductor tracks 97, 98 arranged on opposite sides of the printed circuit board 91, with respect to their dimensions and geometry, results in the formation of a compensation circuit through inductive and capacitive elements of the conductor tracks 97, 98 for a defined impedance matching of the cable branch device 10 according to the requirements of the application. This can be achieved, for example, by locally changing the width of the conductor tracks 97, 98 or by selectively choosing the spacing between the conductor tracks 97, 98 by the thickness of the printed circuit board 91.

[0034] The circuit board 91 can be manufactured from FR4 material as an example. The wire connection elements can be made from brass using a stamping tool.

[0035] In the Fig. 15 and Fig. Figure 16 discloses the construction of the insulating housing 80. Two locking elements 83 are arranged at each of the three end faces 82, 82', 82'' of the T-shaped base plate 81 for mechanical connection with the complementary locking openings 117, 118 of the cable receiving housing 110. Three domes 84, 85, 86 with receiving openings 87 rise from the T-shaped base plate 81 in the direction opposite the locking elements 83. These domes extend through the complementary cutouts 94, 95, 96 of the circuit board 91 and the cutouts 74, 75, 76 of the insulating plate 71. The base plate 81 has a total of six through-openings 88 with a rectangular cross-section for the insertion of the conductor connection elements 101, 101', 102, 102', 103, 103' arranged on the circuit board 91. A frame 89 also rises from the T-shaped base plate 81, which serves to stabilize the insulating housing 80.The insulating housing 80 can be designed as an injection-molded part and made, for example, from a polyamide.

[0036] Figures 17 to 20 reveal the construction of the cable receiving units 105, 106 and 107, which are identical in the exemplary embodiment. According to the Fig. The cable receiving unit 105 consists of a cable receiving housing 110, a conductor receptacle 130, and a strain relief element 150. The conductor receptacle 130 is firmly connected to the cable receiving housing 110 by deformation in the sense of riveting the hollow cylindrical connecting components 123, 124, which extend through the mounting openings 135, 138, into the deformed connecting components 123', 124'. The strain relief element 150 is rotatably mounted on the cable receiving housing 110 by the receiving opening 156 of the strain relief element 150 at least partially enclosing the complementary hinge pin 116 in the circumferential direction. The strain relief element 150 can be rotated back and forth between a position S1 releasing the data transmission cable 11, 21, 31 to be connected and a position S2 fixing the data transmission cable 11, 21, 31 to be connected.

[0037] The cable housing 110 has a base plate 111 from which the side walls 112, 113 and the rear wall 114 rise. Extending from the rear wall 114 towards the data transmission cable 11 to be connected is a strain relief recess 115 with a hinge pin 116 for receiving the strain relief element 150. The side walls 112, 113 and the base plate 111 have the two locking openings 117, 118 as openings for mechanical connection with the complementary locking elements 83 of the insulating housing 80. Such locking connections are known to those skilled in the art. A recess 119, 120 is also provided on each side wall 112, 113 to allow the locking connection to be released using a tool, for example, a screwdriver.

[0038] The rear wall 114 and the strain relief receptacle 115 have a cutout 121 and an outlet opening 122 for receiving the data transmission cable 11, 21, 31 to be connected. The previously mentioned undeformed connecting components 123, 124 rise from the base plate 111 to firmly connect the cable receptacle housing 110 to the wire receptacle 130. A locking unit 125 is provided in the strain relief receptacle 115 for locking with the complementary locking teeth 155 of the strain relief element 150, whereby the end region of the strain relief bracket 157 engages in the designated clearance 126 of the strain relief receptacle 115 when the strain relief element 150 is pivoted from its position S1, which releases the data transmission cable 11, 21, 31 to be connected, to a position S2, which secures the data transmission cable 11, 21, 31 to be connected. The cable receptacle housing 110 can be designed as a zinc die-cast part.

[0039] The vein recording 130 extends according to Fig. 17 with a T-shaped profile 133 between the cover surfaces 131, 132. Two mounting tabs 134, 137 are provided on the end faces of the profile 133, which have mounting openings 135, 138 and are engaged by the connecting components 123, 124 in the assembly of the cable holding unit 105, 106, 107 for connection to the cable holding housing 110. A separating rib 136 is provided for stabilizing the mounting tab 134.

[0040] Between the end faces of profile 133 extend two receiving channels 140, 141 for receiving the first and second conductors 12, 12', 22, 22', 32, 32' of the data transmission cables 11, 21, 31. From the top surface 132 extend two receiving openings 142, 143 for receiving the conductor connection elements 101, 101', 102, 102', 103, 103' into the T-shaped profile 133, which open into the receiving channels 140, 141. The conductor receptacle 130 can, for example, be made of polyamide and manufactured using an injection mold.

[0041] The strain relief element 150 extends between the boundary surfaces 151, 152 in an arc-shaped contour, forming a clearance 153 for receiving the data transmission cable 11, 21, 31 to be connected in the circumferential direction. A clamping rib 154 projecting radially into the clearance 153 further supports the clamping function of the strain relief element 150 in its position S2, which secures the data transmission cable 11, 21, 31. Radially outward-facing locking teeth 155 are provided for locking the strain relief element 150 to the complementary locking unit 125. These teeth allow for multiple locking positions with respect to the cable receiving housing 110, thus enabling the use of data transmission cables with different sheath diameters. The strain relief element 150 can be designed as an injection-molded part and, for example, made of a polyamide.

[0042] The Fig.Figure 21 discloses the cable receiving unit 105 with a data transmission cable 11 connected thereto, wherein the insulated conductors 12, 12' have a conductor insulation 13 which is coaxially penetrated by a conductor 14 and circumferentially surrounded by a pair shielding foil 15. A cable shield 16 in the form of a braided shield is provided between the cable jacket 17 and the pair shielding foil 15. The cable shield 16 is folded back over the cable jacket 17 at the exposed end region of the data transmission cable 11 in such a way that when the cable receiving unit 105 is placed on the connector unit 40, an electrical connection is made between the cable shield 16 and the contact elements 66 of the shielding element 60. To secure the data transmission cable 11 in the axial direction, the strain relief element 150 is in its position that fixes the data transmission cable 11.

[0043] The placement of the cable receiving unit 105, 106, 107 onto the connector unit 40 causes, in addition to the electrical connection of the cable shield 16 to the shielding element 60, the penetration of the conductor connection elements 101, 101' through the receiving openings 142, 143 and the conductor insulations 13 of the conductors 12, 12' into the conductors 14 and in this way an electrical connection of the conductors 12, 12' with the conductor connection elements 101, 101'. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] WO 2021 252 938 A1

[0002] EP 4 270 700 A1

[0007] US 2022 0 013 932 A1

[0008] DE 10 2023 122 398 A1

[0021]

Claims

[1] Cable branching device (10) for electrically connecting three data transmission cables (11, 21, 31), each having a cable shield (16) surrounding a conductor (12, 12', 22, 22', 32, 32'), with a connector unit (40) and three cable receiving units (105, 106, 107), wherein the connector unit (40) comprises a connector housing (41), a shielding element (60), a connection unit (90) and an insulating unit (70) surrounding the connection unit (90), wherein the connection unit (90) comprises a printed circuit board (91) on which conductor connection elements (101, 101', 102, 102', 103, 103') are arranged, wherein the conductor connection element (101) is for connecting to the first conductor (12) of the first data transmission cable (11) is electrically connected via a conductor track (97) to the wire connection elements (102, 103) for connection to the first wire (22, 32) of the second and third data transmission cable (21, 31),wherein the wire connection element (101') for connection with the second wire (12') of the first data transmission cable (11) is electrically connected via a conductor track (98) to the wire connection elements (102', 103') for connection with the second wire (22', 32') of the second and third data transmission cables (21, 31), wherein the cable receiving unit (105, 106, 107) has a cable receiving housing (110) and a wire receiving (130), and wherein the cable receiving unit (105, 106, 107) is detachably connectable to the connector unit (40), , characterized by , that the shielding element (60) has a contact component (65) at each of its three end regions (62, 63, 64) for electrical connection with the cable shield (16) of the data transmission cable (11, 21, 31), and wherein the shielding element (60) is electrically connected to the connector housing (41) of the connector unit (40). [2] Cable branch device (10) according to claim 1, characterized by, that the screen element (60) is formed in one piece. [3] Cable branch device (10) according to one of the preceding claims, characterized by , that the shielding element (60) consists of a metallic conductive sheet material and is manufactured from a stamping and bending tool. [4] Cable branch device (10) according to claim 1, characterized by , that the contact component (65) of the shielding element (60) has elastic spring contact elements (66) for electrical connection with the cable shield (16) of the data transmission cable (11, 21, 31). [5] Cable branch device (10) according to claim 1, characterized by , that the wire connection elements (101, 101', 102, 102', 103, 103') arranged on the circuit board (91) are designed as insulation displacement contacts (IDC). [6] Cable branch device (10) according to claim 1, characterized by , that the insulating unit (70) of the connector unit (40) consists of an insulating housing (80) and an insulating plate (71). [7] Cable branch device (10) according to claim 1, characterized by , that the connector housing (41) of the connector unit (40) and the cable receiving housing (110) of the cable receiving unit (105, 106, 107) are made of a metallic conductive material. [8] Cable branch device (10) according to claim 1, characterized by , that a strain relief element (150) is arranged on the cable receiving unit (105, 106, 107). [9] Cable branch device (10) according to claim 1, characterized by , that the conductor tracks (97, 98) arranged on the circuit board (9) for the electrical connection of the wire connection elements (101, 101', 102, 102', 103, 103') form a compensation circuit for impedance matching with passive elements. [10] Cable connection device (10) according to claim 9, characterized by , that the compensation circuit for impedance matching has inductances and capacitances.

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