EP2541695A1 - Front connection and input/output assembly - Google Patents

Abstract

The invention relates to a front connector (1), wherein the shield bracket (6) with its first leg (61) and second leg (62) on the longitudinal sides (51,52) of the holding body (5) is arranged, the at least portions of the legs (61, 62) are exposed for electrical contact with screen elements (101, 102) of the input / output module (100) in the inserted state.

Description

The invention relates to a front connector for connecting signal lines to an input / output assembly of the control technology, with a plurality of arranged on a front terminal elements for the signal lines and disposed on a back contact means for contacting with the input / output assembly, wherein the connection elements and the contact means are covered by a cuboid holding body.

Furthermore, the invention relates to an appropriate for the front connector input / output module of the control technology configured with a connector receptacle for receiving the front connector.

The aforementioned front connector and the aforementioned input / output module are, for example, from the European publication EP 0 592 712 A1 known. A plug-in connection system for an electronic module is disclosed here, the main focus of the disclosure being to provide a plug-in connection system which allows a space-saving arrangement of contact blades and thus a compact plug.

A similar to the present invention configured assembly with a process plug is in the DE 195 14 842 B4 disclosed. In this disclosure, it is essential to arrange a coding element between the assembly and the process plug, which cooperates with a Gegencodierelement, so that plug for input / output assemblies can not be reversed.

Some assemblies of automation systems are also designed with shielding measures. Screen measure in the sense of the invention means that possible interference couplings or Noise emissions of the module or signal lines should be suppressed. For this reason, these screen measures serve on the one hand to reduce the susceptibility of the module to influences from a process field and, on the other hand, to avoid an interference emission of the module. In addition, it should be prevented that can be performed on possible supplied cables and cables interference in the module. For this purpose, it is known in the modules and / or in incoming lines to implement measures for disturbance elimination on screens. In particular, for cables that are routed to analog input / output modules, it is important that possible interference couplings are suppressed as far as possible in order to avoid a change in the analog values or the current or voltage and thus a falsification of the process value.

In Scripture DE 296 05 311 U1 a proposal for electromagnetic shielding, especially against high frequency noise is disclosed. This teaches the DE 296 05 311 U1 to connect a device for contacting a cable shield of a cable with a shield support plate and a clamp in such a way that the Schirmauflageblech has a tab-shaped tongue and the clamp is clamped enclosing the tab-shaped tongue together with the cable shield of the cable.

It is also possible with an input / output module installed in a control cabinet to pick up and remove the cable shields from analog signal lines right at the entrance to the control cabinet. Another known variant used is the tapping of the cable shield by means of shielding pads below the assembly, these shields can in turn be anchored to a metallic mounting rail of the overall system and noise can be dissipated.

Since known in the prior art front connector and input / output modules either not at all before EMC interference or insufficiently protected, it is an object of the present invention to provide a front connector or the matching module to improve shielding measures or EMC measures, so that less interference in a front connector or an input / output module are coupled or radiated can.

In a front connector for connecting signal lines with an input / output assembly of the control technology, with a plurality of arranged on a front side connecting elements for the signal lines and arranged on a back contact means for contacting with the input / output assembly, wherein the connection elements and the contact means of a cuboid holding body are included, as he is known in the cited prior art, the object is achieved in that a U-shaped shielding shield comprising a first leg, a second leg and a central part, is arranged around the holding body, that the first leg extending laterally to a first longitudinal side and the second leg extending laterally to a second longitudinal side of the holding body, wherein the central part is arranged upstream of a lower end face of the holding body. Such a configured Schirmbügel shields the holding body with its connecting elements, in which the signal lines are guided, from both sides against interference. In addition, a central part of the U-shaped shielding bracket is arranged upstream of the holding body in such a way that it can be connected to a shielding braid in a further embodiment shown later with a supplied cable. This offers the advantage, as shown later, that a Abschirmgeflecht the cable can be connected directly to the front connector, which in turn has the advantage that when unplugging the plug from the input / output module, the cable with its braided shield is already mounted on the plug and not as disadvantageous in the prior art on a separate support means.

In a further embodiment, the holding body on the first longitudinal side, a first guide means, in which the first leg is inserted and on the second longitudinal side, a second guide means, in which the second leg is inserted on. By means of the guide means, the U-shaped shielding bracket can be pushed onto the retaining bracket, which simplifies mounting of the retaining body with shielding bracket.

To further improve a strength between the holding body and the shield bracket, the guide means on Verrastnasen, which engage in the legs arranged recesses.

In order to improve the EMC properties of the front connector, a feed block structurally separate from the holding body is arranged to the lower end face of the holding body. Via such a feed-in block, a supply voltage, such as e.g. 24 V, the module supplied without the supply voltage lines are guided in the connection elements of the holding body.

In order to further optimize the EMC properties of the front connector, an umbrella hood is arranged at least partially around the feed block. In particular, the shield cap is arranged such that, for example, a shield plate between the feed block and the holding body is arranged on the end face of the holding body.

Furthermore, the EMC properties are improved in that the upstream central part at least partially comprises the feed block and is arranged such that the umbrella hood is in electrical contact with the central part.

In a further embodiment, a cable screen clamping element is arranged on the central part, which is in electrical contact with the central part. In this cable screen clamp Cables can be clamped with a shield braid and so the contact to the shielding braid and the shield bracket are made.

In order to further optimize the interaction of the thus shielded front connector with an input / output module, the shield bracket is arranged with its first leg and second leg on the longitudinal sides of the holding body such that at least partial areas of the legs are exposed for electrical contact with shield elements of the holder. / Output module to reach in the inserted state of the front connector.

In conjunction with the front connector described above, the above-mentioned object is achieved by an input / output module of the control technology with a connector receptacle for receiving the front connector solved in that along the connector receptacle, a shield member is arranged such that it is connected to the first leg of the U- shaped shielding tab is in electrical contact. Such shield plates or so-called inserted shield contact elements make in the input / output assembly a conductive connection between the shield bracket and the printed circuit boards contained in the assembly.

To perform this conductive connection niederimpedant possible, the shield element, which is designed as a shield plate, parallel to a plug-in direction of the front connector spring elements for contacting with the first leg, wherein the spring elements protrude as embossing part of the shield plate.

Preferably, the shield element has a contact spring, which is arranged such that the contact spring is in electrical contact with a shield band, wherein the shield band is arranged on a circuit board of the assembly.

In particular, the screen band is arranged quadratfömig on the circuit board in an edge region of the circuit board or surrounds them.

Furthermore, the input / output assembly is configured for rear mounting on a carrier profile, wherein a backplane is present, which carries the circuit board and has backplane contact springs to contact in the attached state with the carrier profile.

This type of embodiment results in the following EMC concept or shielding concept. In the input / output module, a first shielding ring is formed with the shielding element via the contact springs with the shielding strip and the shielding strip with the backplane contact springs, and a second shielding ring is formed over the shielding clip and the carrier profile when the assembly is fastened and the front connector is inserted.

A further preferred embodiment of the input / output module provides that a first screen element on the left side and a second screen element on the right side of the connector receptacle are arranged in a front hood and thereby a cable storage space is shielded.

FIG 1

eine Prinzipskizze für ein EMV-Konzept für Frontstecker und Ein-/Ausgabebaugruppe,

FIG 2

einen Schirmbügel,

FIG 3

den Schirmbügel mit einem Haltekörper,

FIG 4

ein Schirmelement,

FIG 5

eine Ein-/Ausgabebaugruppe in perspektivischer dreidimensionaler Ansicht,

FIG 6

die Ein-/Ausgabebaugruppe mit abgenommener Fronthaube,

FIG 7

die Ein-/Ausgabebaugruppe mit weiteren fehlenden Gehäuseteilen zum Aufzeigen eines zweites Abschirmringes,

FIG 8

eine Detaildarstellung des Haltekörpers mit vorgelagertem Einspeiseblock und

FIG 9

eine weitere Detaildarstellung von Haltekörper, Schirmbügel, Einspeiseblock und zugeordneter Schirmhaube des Einspeiseblocks.

A possible embodiment example and the necessary parts for the previously described EMC concept or for the shielding measures are explained in more detail in the drawing. Show it:

FIG. 1

a schematic diagram for an EMC concept for front connector and input / output module,

FIG. 2

a shield bracket,

FIG. 3

the shield bracket with a holding body,

FIG. 4

a screen element,

FIG. 5

an input / output module in a perspective three-dimensional view,

FIG. 6

the input / output module with removed front hood,

FIG. 7

the input / output module with further missing housing parts for showing a second shielding ring,

FIG. 8

a detailed representation of the holding body with upstream feed block and

FIG. 9

a further detailed representation of the holding body, shield bracket, feed block and associated screen hood of the feed block.

According to FIG. 1 is a schematic diagram of a front connector 1 and an input / output assembly 100 for an EMC concept (electromagnetic compatibility) shown. The points marked with a large X each represent a contact point.

A cable 80 with a braided screen 81 contacted with a shield bracket 6, wherein the shield bracket 6 is made of a metallically conductive material U-shaped and the front connector 1 includes on both sides. The cable 80 has signal lines 2, which are guided for contacting with the input / output module 100 in the front connector 1.

The assembly 100 further includes a circuit board 111 which is secured to a backplane 131. The backplane 131 is in turn attached to a carrier profile 130. The carrier profile 130 is connected via a first rear wall contact spring 131a and a second rear wall contact spring 131b with a third contact spring 101e and with a fourth contact spring 101f of the backplane 131 in a ground connection.

Starting from the contacting point X of the braided shield 81, the braided shield 81 receives an electrically conductive contact with the carrier profile 130 via the shield bracket 6, via a first contact spring 101c, via a shielding band 110, the third contact spring 101e and the rear wall contact spring 131a.

The shielding strip 110 surrounds the printed circuit board 111 in a rectangular manner in an edge region of the printed circuit board 111. The shielding strip 110 can be embodied, for example, as a layer of a multilayer of the printed circuit board 111. The shield band 110 having the first contact spring 101c, the third contact spring 101e, the fourth contact spring 101f, and the second contact spring 101d constitutes a first shielding ring 141, the first shielding ring 141 being an open shielding ring without viewing the carrier profile 130.

The carrier profile 130, which is usually also made of a conductive material, closes via the first rear wall contact spring 131a and the second rear wall contact spring 131b, the aforementioned first shielding ring 141 to a closed second shielding ring 142nd

With the FIG. 2 will the in FIG. 1 only schematically illustrated Schirmbügel 6 described in more detail. The shielding bracket 6 is a shielding bracket 6 which is configured in a U-shaped manner from a metallically conductive material and comprises a first leg 61, a second leg 62 and a middle part 63. The shielding bracket 6 can be regarded as an angled metallic embossing part.

The U-shaped configuration of the Schirmbügels is used in particular to be on the long sides of a holding body 5 (see FIG. 3 ). The middle part 63 is configured with respect to the first leg 61 and the second leg 62 as a box-like, reinforced angle sheet. This embodiment allows a later recording of a cable screen clamping element 8 and a feed block 7 (see FIG. 9 ).

According to FIG. 3 is the off FIG. 2 known Schirmbügel 6 shown with a holding body 5, wherein the holding body connection elements 3 and contact means 4 (see FIG. 8 ). The shield bracket 6 is arranged around the holding body 5 such that the first leg 61 extends laterally to a first longitudinal side 51 and the second leg 62 extends laterally to a second longitudinal side 52 of the holding body 5, wherein the middle portion 63 upstream of an end face 53 of Holding body 5 is arranged.

The longitudinal sides 51 and 52 each have a first guide means 51a and a second guide means 52a, in which the first leg 61 and the second leg 62 can be inserted. At the lower end face 53 opposite end of the holding body 5 are in the guide means 51a, 52a corresponding Verrastnasen, namely a first Verrastnase 51b and a second Verrastnase 52b for receiving a first recess 61a in the first leg 61 and for receiving a second recess 62a in the second Leg 62 arranged.

The shielding bracket 6 with a first leg 61 and second leg 62 is arranged on the longitudinal sides 51,52 of the holding body such that at least partial areas of the legs 61, 62 are exposed for electrical contact with shielding elements 101, 102 of the input / output assembly 100 in the inserted state to reach.

According to FIG. 4 a single first screen element 101 is shown. The FIGS. 6 and 7 show the first screen element 101 in an installed state in the input / output module 100, respectively.

The first shielding element 101 is designed as a shielding plate and can also be manufactured as a stamping part, a first spring element 101a and a second spring element 101b projecting out of the shield plate parallel to a plug-in direction of the front plug 1 as a result of the stamping. Furthermore, the shield plate has a first Contact spring 101c and a second contact spring 101d. The first contact spring 101c and the second contact spring 101d are used for contacting the shield plate with corresponding metallic counter zones on a printed circuit board in the installed state. The shield plate is preferably in a front hood 104 (see FIG. 5 ) integrated. This integration can take place optionally, which offers the advantage that these shielding plates can be omitted in the case of production of assemblies which do not have to fulfill special EMC regulations. On the other hand, they can also be retrofitted to the EMC hood in the bonnet 104.

According to FIG. 5 For example, the input / output assembly 100 is shown in a perspective, three-dimensional design view. Under a hinged front flap can in a plug-in direction 120, the holding body 5, which is part of the front connector plugged into a connector receptacle 103 of the input / output module 100. The aforementioned individual components and a first shield plate 101 made FIG. 4 are now invisibly installed in the bonnet 104.

The shield bracket according to FIG. 2 now includes the holding body 5 according to FIG. 3 and is in FIG. 5 only to be recognized proportionally. With the construction sketch after FIG. 5 the front connector 1 has been added as additional parts, a feed block 7 and a cable shield clamping element 8. A detailed view of the feed block 7 and the cable shield clamping element 8 are the FIG. 9 again.

As an additional EMC measure has a screen hood 71, which is arranged over the feed block 7, proven. Since the central part 63 of the Schirmbügels 6 is arranged upstream of the lower end face 53 of the holding body 5, the central part 63 may additionally comprise the cable shield clamping element 8 and the feed block 7 and thus give mechanical support.

Another perspective, three-dimensional view of the input / output module 100 is according to FIG FIG. 6 shown in this illustration, the front cover 104 from FIG. 5 is hidden.

With FIG. 6 It can now be seen how the first shielding element 101 configured as a shielding plate is arranged in the front hood 104. Along the connector receptacle 103, the first screen element 101 is arranged such that it is in electrical contact with the first leg 61 of the U-shaped shielding clip 6. For an electrical contact with a low impedance to ensure the first spring element 101a and the second spring element 101b, which are embossed into the shroud and thus protrude resiliently and accomplish a low-impedance contact with a connector of the front connector. A first contact spring 101c and a second contact spring 101d thereby provide an electrical contact to the printed circuit board 111, which can only be seen in this representation.

According to FIG. 7 the first circuit board 111 is now recognizable. The first circuit board 111 is disposed on a backplane 131, and via a third contact spring 101e and a fourth contact spring 101f, an electrical shield contact is made from the first circuit board 111 to the backplane 131. A shielding strip 110 is embedded in the first printed circuit board 111, and a second shielding ring 142 for the input / output module 100 can be constructed using this shielding strip 110 and the resilient shielding plate described above taking into account a conductive carrier profile 130.

With the FIG. 8 the feed-in block 7 is shown in a detailed representation. The feed block 7 is the holding body 5 upstream and separated by an additional screen hood 71, which surrounds the feed block 7, of the holding body 5 electromagnetically. Since the feed block 7 with four terminals, for example, the supply of supply voltages for the front connector 1 or the assembly 100 is used, is with the shield cap 71 increases the EMC compatibility between the connecting elements 3 of the holding body 5 and the supply voltages, such as 24 volts, from the feed block 7. Approach can with the FIG. 8 at the edge of the first circuit board 111, the contact means 4 are detected. The advantages of the middle part 63 of the shielding bracket 6 arranged upstream of the lower end face 53 of the holding body 5 are as follows FIG. 9 in a detailed representation particularly well recognizable. Due to the approximately box-shaped configuration of the upstream middle part 63, which is mechanically trained by a bent stamped sheet metal to record the cable shielding clamping element 8 and the feed block 7, EMC shielding can be done directly on the plug and does not have to be performed on an extra rail.

With regard to an EMC immunity to be improved, the holding means 8 is electrically connected to the box-shaped curved central portion 63. The middle part 63 is in turn by clamping the screen hood 71 of the feed block 7 in electrical connection. About the indicated spring elements of the cable screen clamping element cables can be clamped with their braid between the cable screen clamping element and the Mitteilteil 63.

Claims (15)

Front connector (1) for connecting signal lines (2) to an input / output module (100) of the control technology, having a multiplicity of connection elements (3) arranged on a front side for the signal lines (2) and contact means (4) arranged on a rear side for Contacting with the input / output module, wherein the connection elements (3) and the contact means (4) are surrounded by a cuboid holding body (5),
characterized in that comprising a U-shaped embossed Schirmbügel (6) a first leg (61), - A second leg (62) and a central part (63), is arranged around the holding body (5) such that the first leg (61) extends laterally to a first longitudinal side (51) and the second leg (62) extends laterally to a second longitudinal side (52) of the holding body (5) the central part (63) is arranged upstream of a lower end face (53) of the holding body (5). Front connector (1) according to claim 1, wherein the holding body (5) on the first longitudinal side (51) has a first guide means (51a), in which the first leg (61) can be inserted, and on the second longitudinal side (52), a second guide means (52a), in which the second leg (62) can be inserted, has. Front connector (1) according to claim 2, wherein the guide means (51a, 52a) Verrastnasen (51b, 52b), in which in the legs (61,62) arranged recesses (61a, 62a) engage. Front connector (1) according to one of claims 1 to 3, wherein to the lower end face (53) of the holding body (5) from the holding body (5) structurally separate feed block (7) is arranged. Front connector (1) according to claim 4, wherein at least partially around the feed block (7) an umbrella hood (71) is arranged. Front connector (1) according to claim 5, wherein the upstream central part (63) at least partially comprises the feed block (7) and is arranged such that the screen hood (71) is in electrical contact with the central part (61). Front connector (1) according to one of claims 1 to 6, wherein at the central part (63) a cable screen clamping element (8) is arranged, which is in electrical contact with the central part (63). Front connector (1) according to one of claims 1 to 7, wherein the shield bracket (6) with its first leg (61) and second leg (62) on the longitudinal sides (51,52) of the holding body (5) is arranged, the at least Parts of the legs (61,62) exposed to an electrical contact with shield elements (101,102) of the input / output assembly (100) to achieve in the inserted state. Input / output module (100) of the control technology designed with a connector receptacle (103) for receiving a front connector (1) according to one of the preceding claims, characterized in that along the connector receptacle (103) a shielding element (101,102) is arranged such that it is in electrical contact with the first leg (61) of the U-shaped shielding bracket (6). Input / output module (100) according to claim 9, wherein the shield element (101, 102) is designed as a shield plate and parallel to a plug-in direction (120) of the front plug (1) spring elements (101a, 101b) for contacting the first leg (61). protrudes as embossing parts of the shield plate. The input / output assembly (100) of claim 8 or 9, wherein the shield member (101, 102) comprises a contact spring (101c, 101d) disposed such that the contact spring is in electrical contact with a shield band (110) Screen strip (110) on a circuit board (111,112) of the assembly (100) is arranged. The input / output module (100) according to claim 10, wherein the shield band (110) surrounds the circuit board (111, 112) in a rectangular shape in an edge area of the circuit board (111, 112). An input / output assembly (100) according to claim 11, adapted to be mounted rearwardly on a support profile (130), there being a backplane (131) supporting the circuit board (111, 112) and having backplane contact springs (131a, 131b) in the mounted state to contact with the carrier profile (130). The input / output assembly (100) of claim 12, wherein - The shield element (101) via - The contact springs (101c, 101d) with - The Schirmband (110) and the Schirmband (110) with - Form the backplane contact springs (121a, 131b) a first shielding ring (141), and with attached assembly and plugged front connector (100) via - the shield bracket (6) and - The support profile (130), a second shielding ring (142) is formed. Input / output module (100) according to one of claims 9 to 13, wherein a first screen element (101) on the left side and a second screen element (102) on the right side of the connector receptacle (103) are arranged in a front hood (104) and thereby a cable storage space (105 ) shield.

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