DE102016224963A1 - Control device for a bus system and method for data transmission in a bus system - Google Patents

Abstract

A control device (11) for a bus system (1) and a method for data transmission in a bus system (1) are provided. The control device (11) comprises a circuit board (111) which is connected to hardware (112) or has for controlling a communication of the control device (11) in the bus system (1), in which a subscriber station (10) with at least one further subscriber station (11). 20, 30) of the bus system (1) exchanges at least one message (45; 46; 47) via a bus (40) of the bus system (1) and at least four terminals (x, y, y, x) for a connection electrical lines 411, 412, 421, 422) are configured, with which the hardware (112) to a bus component (43, 430) of the bus system (1) is electrically connectable, wherein in each case two terminals of the at least four terminals (x, y, y, x) are electrically connected to one another such that at least one first line pair (411, 421) can be electrically connected to two first connections or two second connections of the at least four connections (x, y, y, x), wherein the at least four connections (x, y, y, x) such a are arranged, that the two electrically interconnected second terminals (y) between the two electrically interconnected first terminals (x) are arranged, and / or that the four terminals (x, y, y, x) in at least two juxtaposed rows are arranged such that the electrically interconnected first terminals (x) are arranged diagonally to each other and the electrically interconnected second terminals (y) are arranged diagonally to each other.

Description

Technical area

The present invention relates to a control device for a bus system and a method for data transmission in a bus system, in which a location-symmetrical signal transmission with four lines for improving the electromagnetic compatibility (EMC) is performed.

State of the art

In the vehicle, Ethernet and / or LVDS (Low Voltage Digital System) are increasingly being used for data transmission between the control devices or control devices. LVDS uses a lower voltage than usual high voltage of 5V or 3.3V used in digital systems.

Both Ethernet and LVDS transmit the data over a wire pair or pair of wires that may be twisted or coaxed. These transmission techniques either have very large problems with the standard connectors used, or have to do without them, because the usual protective measures against electromagnetic radiation to improve the electromagnetic compatibility (EMC) can not be used there (can).

In CAN networks in which the messages are transmitted by means of the CAN and / or CAN FD protocol, as described in the current ISO-CD-11898-1 as CAN protocol specification with CAN FD, the lines usually connect more as two controllers or controllers. The controllers are also often connected via stub lines to the bus. The longer the stub lines, the greater annoying reflections which degrade the signal quality and thereby reduce the maximum possible data transmission speed in the network. In order to keep the stub line as small as possible, in extreme cases the CAN_H and CAN_L lines are led into and out of the control device. However, this usually doubles the area of attack for electromagnetic radiation.

In general, there is a trend that the control devices are equipped with more but smaller and closer together plug contacts.

It would be advantageous if the connectors already installed in the control devices can also be used for higher data transmission rates in order to be able to continue to use existing infrastructure and to meet the ever increasing demands on the transmission rates.

Disclosure of the invention

It is therefore an object of the present invention to provide a control device for a bus system and a method for data transmission in a bus system, which solve the aforementioned problems. In particular, a control device for a bus system and a method for data transmission are to be provided in a bus system, in which even existing in subscriber stations of the bus system connectors are also suitable for higher data rates than previously possible with the existing connectors.

The object is achieved by a control device for a bus system with the features of claim 1. The control device comprises a board, which is connected to hardware or has to control a communication of the control device in the bus system, in which a subscriber station with at least one further subscriber station of the bus system exchanges at least one message via a bus of the bus system, and at least four terminals for a Connection to electrical lines are configured with which the hardware is electrically connected to a bus component of the bus system, wherein two terminals of the at least four terminals are electrically connected to each other, so that at least a first pair of wires to two first terminals or two second terminals of the at least four Terminals is electrically connected, wherein the at least four terminals are arranged such that the two electrically interconnected second terminals between the two electrically interconnected first terminals arranged are, and / or that the four terminals are arranged in at least two juxtaposed rows such that the electrically interconnected first terminals are arranged diagonally to each other and the electrically interconnected second terminals are arranged diagonally to each other.

With the control device, the data transmission rate can be increased due to the better signal-to-noise ratio of a signal for messages in the bus system. In this case, no separate plug should be used for the data lines, which would not only increase the component costs but also increases the complexity of wiring the vehicle.

Another advantage is that with the described control device when using four instead of two lines for a signal line pair additionally the robustness of the system can be increased compared to cable breaks and loose contacts. The reason for this is that important messages can still be sent at a reduced data rate, even if there is a cable break. In the case of a cable break, the signal-to-noise ratio deteriorates.

The method implemented with the control device for arranging the connections for lines can preferably be used in data transmission via control units and solves one of the major problems of automotive Ethernet and further developments of CAN, but can also bring benefits within the control unit.

Advantageous further embodiments of the subscriber station are specified in the dependent claims.

Possibly, the at least four connections are designed as plug-in contact or plug connector. It is also possible that the at least four terminals are arranged in at least one row next to each other. Preferably, the distances of the at least four ports are equal to each other. It is possible that the circuit board is designed such that at least one electrical connection of the four connections can be made by minimizing the insertion of the board during production and / or by actuation of at least one switch after production.

According to one embodiment variant, the connections on the circuit board are electrically connected to one another. According to a further embodiment variant, the at least one line pair in the semiconductor material of the hardware are electrically connected to one another. According to yet another embodiment variant, at least one line pair is electrically connected in a harness-side connector. According to yet another embodiment variant, a line pair is electrically connected to the two first terminals or the two second terminals and electrically connected to the respective other two terminals, at least one reflection reduction unit.

In the bus system, at least a first and a second line pair may be electrically connected to the at least four terminals. According to yet another embodiment variant, at least two line pairs are guided out of the control device and in each case one line pair is electrically connected to one connection of a transmitting / receiving device, which is designed to transmit or receive a message via the bus of the bus system.

It is conceivable that a first line of the first line pair is twisted with the adjacent line of the second line pair. Alternatively, it is conceivable that the first line pair is twisted with the second line pair.

According to yet another alternative is also conceivable that the first line pair is designed as a coaxial line and the second line pair is designed as a coaxial line. Further alternatively, it is conceivable that the first line pair and the second line pair are designed untwisted as a ribbon cable. In yet another alternative, the first pair of wires and the second pair of wires are sheathed and / or shielded in pairs.

The bus component may be a subscriber station of the bus system or a connector for the two bus lines or a branch of the two bus lines. Additionally or alternatively, the bus system may be a CAN bus system or a CAN FD bus system in which CAN-H to the two first ports and CAN-L to the two second ports or CAN-H to the two second ports and CAN-L is connected to the two first connections.

It is also possible that a third line pair is performed by the controller by connecting a first line of the third line pair to both first lines of the first and second line pairs and connecting a second line of the third line pair to both second lines of the second line pair ,

The control device described above may be part of a subscriber station for a bus system, which additionally has a transmitting / receiving device for transmitting a message generated by the control device via the bus to at least one further subscriber station of the bus system or for receiving a message from another subscriber station of the bus system and for forwarding the received message to the controller.

The control device described above and at least one subscriber station described above can be part of a bus system, which also comprises a bus, via which at least two subscriber stations can be connected to one another such that they can communicate with one another.

The aforementioned object is also achieved by a method for data transmission according to claim 10 in a previously described bus system. In the method, a message transmitted by a further subscriber station via the bus of the bus system is received by a transmitting / receiving device of a subscriber station or a message is sent to the transmitting / receiving device of the subscriber station on the bus to at least one further subscriber station.

The method offers the same advantages as previously mentioned with respect to the controller.

Further possible implementations of the invention also include not explicitly mentioned combinations of features or embodiments described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

list of figures

• 1 ein vereinfachtes Blockschaltbild eines Bussystems gemäß einem ersten Ausführungsbeispiel;
• 2 eine vereinfachte Darstellung einer Platine einer Steuereinrichtung gemäß dem ersten Ausführungsbeispiel;
• 3 eine vereinfachte Darstellung eines kabelseitigen Steckers für eine Steuereinrichtung gemäß dem ersten Ausführungsbeispiel;
• 4 eine vereinfachte Darstellung einer Platine einer Steuereinrichtung gemäß einem zweiten Ausführungsbeispiel;
• 5 eine vereinfachte Darstellung einer Platine einer Steuereinrichtung gemäß einem dritten Ausführungsbeispiel;
• 6 eine vereinfachte Darstellung einer Platine einer Steuereinrichtung gemäß einem vierten Ausführungsbeispiel; und
• 7 eine vereinfachte Darstellung von Steuereinrichtungen gemäß einem fünften Ausführungsbeispiel.

The invention is described in more detail below with reference to the accompanying drawings and to exemplary embodiments. Show it:

• 1 a simplified block diagram of a bus system according to a first embodiment;
• 2 a simplified representation of a board of a control device according to the first embodiment;
• 3 a simplified representation of a cable-side connector for a control device according to the first embodiment;
• 4 a simplified representation of a circuit board of a control device according to a second embodiment;
• 5 a simplified representation of a board of a control device according to a third embodiment;
• 6 a simplified representation of a board of a control device according to a fourth embodiment; and
• 7 a simplified representation of control devices according to a fifth embodiment.

In the figures, identical or functionally identical elements are provided with the same reference numerals, unless stated otherwise.

Description of the embodiments

1 shows a bus system 1 , which may be, for example, a CAN bus system, a CAN FD bus system, etc. The bus system 1 can be used in a vehicle, in particular a motor vehicle, an aircraft, etc., or in the hospital, etc. The bus system 1 however, is not limited to a CAN bus system. The bus system 1 may alternatively be in particular an Ethernet bus system. Alternatively or additionally, the bus system 1 to transmit or receive data in the form of lower level signals or signals than 5V or 3.3V, which is the usual voltage level in digital systems.

In 1 has the bus system 1 a variety of subscriber stations 10 . 20 . 30 , each to a bus 40 with a first bus line 41 and a second bus line 42 are connected. This is for the subscriber station 20 a branch 43 on the bus 40 for its bus lines 41 . 42 intended. The branch 43 can also be designed as a connector or can at a neutral point of the bus system 1 be provided. The subscriber stations 10, 20, 30, the branch 43 or the connectors form bus components of the bus system 1 , There are any many and other combinations of subscriber stations 10 . 20 . 30 , Branches 43 or connectors conceivable and possible.

The bus lines 41 . 42 can also be called CAN_H and CAN_L and are used to couple the dominant levels in the send state. About the bus 40 can messages 45 . 46 . 47 in the form of signals between the individual subscriber stations 10 . 20 . 30 be transmitted. In the CAN bus system or CAN FD bus system is determined in an arbitration phase, which of the currently transmitting subscriber station (s) 10 . 20 . 30 of the bus system 1 at least temporarily an exclusive, collision-free access to the bus 40 of the bus system 1 gets.

As in 1 shown has the subscriber station 10 a communication control device 11 and a transceiver 12 , The communication control device 11 has a board 111 , The transmitting / receiving device 12 has a connection unit 121 , The subscriber station 20 has a communication control device 21 and a transceiver 22 , The communication control device 21 has a board 211 , The transmitting / receiving device 22 has a connection unit 221 , The subscriber station 30 has a communication control device 31 and a transceiver 32 , The communication control device 31 has a board 311 , The transmitting / receiving device 22 has a connection unit 321. The transmitting / receiving devices 12 . 22 . 32 the subscriber stations 10 , 20, 30 are each directly to the bus 40 connected, even if this is in 1 not shown.

The communication control devices 11 . 21 . 31 serve to control a communication of the respective subscriber station 10 . 20 . 30 over the bus 40 with another subscriber station to the bus 40 connected subscriber stations 10 . 20 . 30 , The communication control devices 11 . 21 31 can be implemented like a conventional CAN controller. The transmitting / receiving devices 12 . 22 . 32 serve to send the messages 45 . 46 , 47 and may be implemented like a conventional CAN transceiver.

The subscriber stations 10 . 20 . 30 may be, for example, control devices or control devices or display devices or sensors of a motor vehicle.

2 shows the board 111 the communication control device 11 from 1 more accurate. On the board 111 is hardware 112 present, with which a control of communication of the subscriber stations 10 . 20 . 30 in the bus system 1 from 1 is possible. The hardware can, in cooperation with control commands of a software, communicate between at least two subscriber stations of the subscriber stations 10 . 20 . 30 realize as previously described.

According to 2 are on the board 111 also two first terminals x and two second terminals y present. The terminals x, y are arranged side by side in a row. Here, the two second terminals y are arranged between the two first terminals x. In addition, the first two connections x are a first line 411 a first line pair and a first line 412 electrically connected to a second line pair. At the two second terminals y are a second line 421 of a first line pair and a second line 422 electrically connected to a second line pair. The two first connections x are connected to each other via a connection 413 connected. The two second terminals y are connected to each other via a connection 423 connected. The distances of the adjacent terminals x, y, y, x to each other are preferably the same size. In other words, the distances between the adjacent terminals x, y, y, x are preferably the same size. In this way, the inductive and capacitive radiation to the terminals x, y, y, x are equal and cancel each other. The same applies to the lines 411 . 412 , 421, 422 when they are parallel and not twisted. Again, the distances between the adjacent lines 411 . 412 . 421 . 422 preferably the same size, so that the inductive and capacitive radiations are the same size and cancel each other out.

Therefore, flows in the first and second line 411 . 412 of the first line pair, the same current I in the same direction, namely in the representation of 2 up. In addition, flows in the first and second line 421 . 422 of the second line pair, the same current I in the same direction, namely in the representation of 2 downward. As a result, a magnetic field sets in, which is a magnetic field Flow density B has the consequence between the lines 411 . 421 into the drawing plane of 2 is directed in and between the lines 422 . 412 from the drawing level of 2 is directed out.

The composite of the four lines behaves very clearly 411 . 421 . 422 . 412 like a 2D cut of a coaxial cable, where the outer conductor and the inner conductor each consist of two wires. The outer conductors are in 2 the wires 411 and 412 of the first line pair. The inner conductors are in 2 the lines 421 and 422 of the second line pair. An electromagnetic radiation from the far field causes capacitive and inductive couplings between the two lines 411 . 421 , in the 2 are arranged on the left, are just as large as in the two lines 422 . 412 , in the 2 are arranged on the right.

The internal control unit connection of the two outer and inner lines 411 . 421 . 422 . 412 causes the capacitive and inductive couplings to cancel each other out. With the two combined pairs of lines from the lines 411 . 421 . 422 . 412 can be transmitted as usual a differential voltage signal that is less sensitive to electromagnetic radiation than in a voltage-balanced signal transmission with two closely spaced or twisted lines.

In general, the two pairs of lines from the lines 411 . 421 . 422 . 412 on the control unit board 111 connected with each other. In order to minimize ECU-internal electromagnetic interference, the four lines can 411 . 421 . 422 . 412 but also up to / in 1 shown transceiver or transceiver 12 and only at its / its connection unit 121 or in extreme cases only in the semiconductor material for the connection unit 121 be connected to each other. It is also possible that the four wires 411 . 421 . 422 . 412 at the board 111 are interconnected in the semiconductor material.

Inside the control unit, the procedure for connecting the lines 411 . 421 , 422, 412 at the terminals and transmitting data therewith are also used, for example, two microcontrollers of the controller 11 or a microcontroller of the subscriber station 10 and the communication control device 11 on the same board 111 or connect to each other on two different boards. The distances of the four lines 411 . 421 . 422 . 412 can be chosen much larger than the distance in the transmission with only two lines. This will reduce the parasitic capacitance caused by the closely spaced lines 411 . 421 . 422 . 412 arises, much smaller and the characteristic impedance greater. As a result, the necessary Umladeströme and thus the performance of driver chips can be reduced, which the signals or the current I for the lines 411 , 421, 422, 412.

Alternatively, the four wires 411 . 421 . 422 . 412 untwisted be performed as a ribbon cable. As a result, the EMC may be a bit worse, but can be achieved by the ribbon cable very small bending radii. If small bending radii are not necessary, but for a very good EMC can be achieved, then the four pairs of lines according to 4 be arranged and twisted together and jacketed, as described below.

The execution of the four lines 411 . 421 . 422 . 412 according to 2 As a ribbon cable is useful and useful for connections between multiple boards within a housing.

The terminal block of 2 can be expanded with any number of connection blocks for every four connections x, y. This results in, for example, a combination of xyyxxyyx terminals in a row.

3 shows the case of 2 applied to a CAN bus system. Here is for the communication control device 21 on their board 211 with hardware 212 a connector 430 provided with which the signal of the bus line 41 , namely CAN_H, on the two outer lines 411 . 412 is switched. Also, with the connector 430 the signal of the bus line 42 , namely CAN_L, on the two inner wires 421 . 422 connected. Alternative to the illustration in 3 could the four wires 411 . 421 . 422 . 412 are guided to a further control device and interconnected there in the same way internally. The communication control devices 11 . 31 are in the example of 3 By contrast, already at the connection unit whose transmitting / receiving device 12 . 32 connected, even if this is in 3 not shown in detail.

As a result, the four lines 411 . 421 . 422 . 412 already in the cable-side connector or the cable-side connector 430 be joined together so that only two lines 41 . 42 must be performed to the other controller. For bus systems 1 with spur lines, as described above, one pair of cables to the cable-side connector and another pair of cables from the cable-side connector can be continued in each case. The spur line over the plug into the control unit, which in 3 the controller 21 is, can then with four spatially symmetrically arranged lines 411 . 421 . 422 . 412 be executed as described above.

4 shows a second embodiment for the connection of the four lines 411, 421, 422, 412 at the terminals x, y of 2 , Here are in contrast to the first embodiment, the two right lines 411 . 421 and the two left lines 422 . 412 twisted together as a pair of wires. In addition, the twisted cable pairs can be sheathed in pairs. In this case, a course of the magnetic flux density B, as in FIG 3 shown.

If necessary, those from the four lines 411 . 421 . 422 . 412 shielded in addition to the assembled cable and connectors are connected in the immediate vicinity of the shield to ground.

Besides, the board is 111 in the present embodiment optionally configured such that two switches 414 and 424 in the electrical connections 413 and 423 are provided. Alternatively, pluggable electrical connections are provided as electrical connection of the terminals x and y. In this way, the detachable electrical connection by Minderbestückung the board 111 not be present during production.

Will the switches 414 and 424 operated, can also after production of the control device 11 the electrical connections 413 and 423 the terminals x and y are still separated and thus also not be present.

As a result, either two of the four terminals x, y, y, x can optionally be used to transmit other signals or, in the presence of the electrical connections 413 . 423 , the best possible data transmission characteristics are produced.

5 shows a third embodiment of the arrangement of the terminals x, y. In this case, two of the four terminals x, y are arranged in a row. The resulting two rows for the terminals x, y are arranged side by side. The terminals x, y are arranged such that of two superimposed pairs of terminals x, y, the diagonally opposite terminals x, x via the connection 413 and the ports y, y over the link 423 are connected to each other inside the control unit. This results in a point-symmetrical cable routing.

$$\text{y x x y}$$

oder in zwei vertikalen Reihen, bei welchen die beiden Blöcke von vier Anschlüssen x, y einer Reihe untereinander angeordnet sind: $$\text{x y}$$

$$\text{y x}$$

$$\text{y x}$$

$$\text{x y}$$

If more than two cable pairs are to be connected, the connections x, y provided for this purpose can be arranged side by side in two blocks. For this purpose, the following two variants result, namely in two horizontal rows, in which the two blocks of four terminals x, y of a row are arranged side by side: $$\text{x y y x}$$

$$\text{y x x y}$$

or in two vertical rows, in which the two blocks of four terminals x, y of a row are arranged one below the other: $$\text{x y}$$

$$\text{y x}$$

$$\text{y x}$$

$$\text{x y}$$

$$\text{y x x y}$$

$$\text{y x x y}$$

$$\text{x y y x}$$

The terminal blocks can be expanded as required, resulting, for example, in the following combination of four connections per horizontal and vertical row: $$\text{x y y x}$$

$$\text{y x x y}$$

$$\text{y x x y}$$

$$\text{x y y x}$$

6 shows a fourth embodiment for a connection of lines 411, 421, 422, 412 to terminals x, y. Here, the outer and inner lines are routed to a coaxial cable for the best possible EMC compatibility. The arrangement of the cables in the coaxial cable is on the right in 6 shown. Also in this case, the resulting cable can be additionally shielded.

7 shows a fifth embodiment for a connection of the line pairs to control devices 11 . 21 . 31 together with their internal and external wiring. The connections x, y described above are not explicitly shown here, since their arrangement has previously been described with reference to FIG 2 and 4 to 6 has been described in detail.

According to 8th are the three control devices 11 . 21 . 31 together on the same bus 40 connected. The control device 11 has a reflection reduction unit 115 , which can be configured as a terminating resistor and / or as a Zener diode, for the reduction of reflections. The control device 31 has a reflection reduction unit 315 , which can also be configured as a terminating resistor and / or as a zener diode, for the reduction of reflections. In the control device 11 is the reflection reduction unit 115 mounted internally and in each case two of the four connections for the lines 411 . 412 . 421 . 422 are both in the control device 11 as well as in the wiring harness side connector 430 electrically connected to each other. In the control device 31 each two of the four terminals are exclusively in the control device 31 connected with each other. At two of the non-electrically connected terminals is another reflection reduction unit 44 attached, since these two connectors are the end of the bus 40 represent.

From the controller 31 leads a pair of wires to the controller 21 and another line pair is from the controller 21 to the control device 11 guided. The control devices 11 . 21 show alternative versions, which can be selected as required. The control device 21 is optional, instead a line pair can be directly from the controller 11 to the controller 31 be guided. Likewise, further control devices in the execution as the control device 21 in the network for the bus 40 be inserted by the line pair between the controllers 11 . 31 separated and connected to the four free ends of the cable.

With the reflection reduction units 115 . 315 . 44 Reflections can be suppressed by open bus wire ends, connectors or branches in the bus 40 arise. Is the reflection reduction unit 115 , 315, 44 designed as a Zener diode, the differential voltage U _D on the bus 40 be limited to at least 0 V and a maximum of 2V. Preferably also in or in the control device 21 a reflection reduction unit provided, even if this in 8th not shown.

In this way, on the one hand the EMC radiation and on the other hand, the reflections through the open cable ends on the connector 430 and at the controls 11 . 21 . 31 be reduced without branching in the wiring harness are necessary.

For all embodiments, it is also possible to use further plug contacts for signal transmission in order to reduce the difference of the characteristic impedance between the plug or connector and line. The smaller the difference of the characteristic impedance, the lower are the reflections through the plug.

All previously described embodiments of the bus system 1 , the subscriber stations 10 . 20 . 30 and the method can be used individually or in all possible combinations. In particular, all the features of the previously described embodiments and / or their modifications can be arbitrarily combined or omitted. In addition, the following modifications are conceivable, in particular.

The bus system described above 1 according to the first to third embodiments will be described with reference to a based on the CAN protocol bus system. The bus system 1 however, according to the various embodiments may also be another type of communication network. It is advantageous, but not necessarily a requirement, that in the bus system 1 at least for certain periods of time an exclusive, collision-free access of a subscriber station 10 . 20 30 on the bus 40 or a common channel of the bus 40 is guaranteed.

The bus system 1 According to the first and / or second embodiment, in particular a CAN network or a CAN FD network or a FlexRay network or an SPI network, an Ethernet or other bus system with branched or unbranched bus lines or bus wires or data lines. LVDS can be used at least partially in the bus systems.

However, it is also conceivable that one of the two bus lines 41 . 42 connected to ground and thus is a ground line and the other of the two bus lines 41 . 42 a signal line is on which the bus signal for the messages 45 . 46 . 47 is transmitted.

The number and arrangement of subscriber stations 10 . 20 . 30 in the bus system 1 according to the embodiments is arbitrary. In particular, only subscriber stations can 10 or subscriber stations 30 in the bus systems 1 the embodiments may be present.

The functionality of the above-described embodiments is not limited to a communication control device 11 . 21 . 31 for communication in a bus system, but also in any controller, such as a windshield wiper controller, an audio controller, etc. Additionally or alternatively, it may be integrated into existing products. In particular, it is possible that the considered functionality is either in a communication control device 11 . 21 . 31 implemented as a separate electronic component (chip) or embedded in an integrated overall solution in which only one electronic component (chip) is present.

Claims (10)

Control device (11) for a bus system (1), with a circuit board (111) which is connected to hardware (112) or has for controlling a communication of the control device (11) in the bus system (1), in which a subscriber station (10) with at least one further subscriber station (20, 30) of the bus system (1) exchanges at least one message (45; 46; 47) via a bus (40) of the bus system (1), and at least four terminals (x, y, y, x) configured for connection to electrical lines (411, 412, 421, 422) to which the hardware (112) is connected to a bus component (43, 430) of the bus system (1 ) is electrically connectable, wherein in each case two terminals of the at least four terminals (x, y, y, x) are electrically connected to each other, so that at least one first line pair (411, 421) to two first terminals or two second terminals of the at least four terminals (x, y, y, x) is electrically connectable, wherein the at least four terminals (x, y, y, x) are arranged such that the two electrically connected second terminals (y) are arranged between the two first terminals (x) electrically connected to each other, and / or that at least four Terminals (x, y, y, x) are arranged in at least two juxtaposed rows such that the electrically interconnected first terminals (x) are arranged diagonally to each other and the electrically interconnected second terminals (y) are arranged diagonally to each other. Control device (11) after Claim 1 wherein the at least four terminals (x, y, y, x) are designed as plug-in contact or plug connector, and / or wherein the at least four terminals (x, y, y, x) are arranged side by side in at least one row, and / or wherein the distances of the at least four terminals (x, y, y, x) are equal to each other, and / or wherein the board (111) is designed such that at least one electrical connection of the four terminals (x, y, y, x ) can be done by assembly change of the board (111) with additional hardware during production and / or by operating at least one switch after production. Control device (11) after Claim 1 or 2 wherein the terminals (x, y, y, x) on the board (111) are electrically interconnected, and / or wherein the at least one pair of wires (411, 412, 421, 422) are interconnected by two terminals in the semiconductor material of the hardware (112 ), and / or wherein at least one line pair (411, 412, 421, 422) is electrically connected in a harness-side connector, and / or at one of the first terminals (x) and one of the second terminals (y) a line pair (421, 411) is electrically connected and at the respective other two terminals at least one reflection reduction unit (16) is electrically connected. Control device (11) according to one of the preceding claims, wherein at least a first and a second line pair (411, 412, 421, 422) are electrically connected to the at least four terminals (x, y, y, x), wherein at least two pairs of lines (411, 412, 421, 422) are guided out of the control device (11) and in each case a line pair is electrically connected to a terminal of a transceiver (12) which is capable of transmitting or receiving a message (45; 46, 47) via the bus (40) of the bus system (1) is configured Control device (11) after Claim 4 wherein a first line (41) of the first line pair is twisted with the adjacent line (42) of the first line pair, or wherein the first line pair (411, 421) is twisted with the second line pair (421, 421); first line pair (411, 421) is designed as a coaxial line and the second line pair (421, 421) is designed as a coaxial line, or wherein the first line pair (411, 421) and the second line pair (421, 421) are designed untwisted as a ribbon cable, or wherein the first line pair (411, 421) and the second line pair (421, 421) are sheathed and / or shielded in pairs. Control device (11) according to one of the preceding claims, wherein the bus component is a subscriber station (20; 30) of the bus system (1) or a connector (430) for the two bus lines (41, 42) or a branch (43) of the two bus lines (41, 42), and / or wherein the bus system (1) is a CAN bus system or a CAN FD bus system, wherein the CAN-H on the two first ports (x) and CAN-L on the two second ports (y) or CAN-H on the two second terminals (y) and CAN-L on the two first terminals (x) is connected. Control device (11) according to one of the preceding claims, wherein a third line pair (41, 42) is performed by the control unit (11) by a first line (41) of the third line pair with both first lines (411, 412) of the first and second line pair is connected and a second line (42) of the third line pair is connected to both second lines (421, 422) of the first and second line pair. Subscriber station (10) for a bus system (1), with a control device (11) according to one of the preceding claims, and a transmission / reception device (12) for transmitting a message (45; 46; 47) generated by the control device (11) via the bus (40) to at least one further subscriber station (20, 30) of the bus system (1) or for receiving a message (45; 46; 47) from a further subscriber station (20, 30) of the bus system (1) and for forwarding the received message (45; 46; 47) to the control device (11). Bus system (1), with a bus (40), at least two subscriber stations (10, 20, 30) according to Claim 8 , which are connected to each other via the bus (40) such that they can communicate with each other, and at least one control device (11) according to one of Claims 1 to 7 , Method for data transmission in a bus system (1) according to Claim 9 in which a message (45; 46; 47) transmitted by a further subscriber station (20; 30) via the bus (40) of the bus system (1) is received by a transmitting / receiving device (12) of a subscriber station (10) in which a message (45; 46; 47) is sent to the bus (40) to at least one further subscriber station (20, 30) with the transceiver device (12) of the subscriber station (10).

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