EP1468504A1

EP1468504A1 - Coupling device

Info

Publication number: EP1468504A1
Application number: EP02806558A
Authority: EP
Inventors: Markus Bittner; Erhard LÜTHI
Original assignee: Ascom Powerline Communications AG
Current assignee: Ascom Intermediate AG
Priority date: 2002-01-24
Filing date: 2002-01-24
Publication date: 2004-10-20
Also published as: WO2003063381A1

Abstract

A data signal in a powerline system is inductively coupled between a service line (1) and a signal line (11) connected to a transmitter/receiver (10.1). Coupling ferrites (12.1, 12.2) are arranged around two phase conductors (2.2, 2.3) of the service line (1). The signal conductors (11.1, 11.2) of the signal line (11) are fed through the holes of said coupling ferrites (12.1, 12.2) in the form of a loop and are then connected to each other. A data signal transmitted from the transmitter/receiver (10.1) to the signal line (11) can be coupled to the two phase conductors (2.2, 2.3) of the service line (1) by means of the inventive coupling device. The whole process is of course reversible.

Description

coupling device

Technical field

The invention relates to a coupling device for coupling or decoupling a data signal with a carrier frequency of more than 1 MHz into or from a power supply network. The invention further relates to a corresponding method for transmitting data via a power supply network and corresponding arrangements. State of the art

High-bit-rate data communication has become increasingly important in recent years. Large amounts of data such as high quality music, video sequences or other large amounts of data are also being sent electronically. Existing communication networks such as the fixed telephone network or cellular networks offer insufficient bandwidth for this and are often very busy. Furthermore, such networks have a major disadvantage with already existing broadband networks such as ADSL (Asymmetrical Digital Subscriber Line) or data transmission via cable television systems: they are expensive and have to be created beforehand with enormous effort.

Power supply networks are a suitable alternative for broadband data transmission, because firstly practically every household has a connection to a power supply network and secondly large data transmission rates can also be realized. In order to transmit data via a power supply network, however, it must first be brought into a suitable form and then fed into the power supply network.

Such devices are known. The data is first encoded, compressed if necessary and then modulated onto a high-frequency carrier signal. The resulting high-frequency data signal is coupled into the power supply network at the transmitter and is again coupled out of the power network at the receiver in an analog manner, demodulated, decompressed if necessary and finally decoded.

In WO / 01 3305 coupling devices are described in which the input or. The data is extracted capacitively. This means that the power lines must be tapped physically and the data fed into the power lines using a crossover or filtered out of them. However, these couplers have various disadvantages: To install a coupler, the current in the corresponding lines must be switched off, since there is otherwise a great risk of injury. In addition, the typical coupling points, such as the busbars in a house connection box with a plurality of outlets, have low impedances, which results in large impedance differences and thus a poorer transmission quality. Finally, such coupling devices are extremely expensive to manufacture due to the required electrical protective insulation.

Presentation of the invention

The object of the invention is to provide a coupling device of the type mentioned at the outset which avoids the disadvantages of the known couplers and in particular enables inexpensive and good coupling of the data signal.

The solution to the problem is defined by the features of claim 1. According to the

The coupling device is designed to couple a data signal into and out of a power supply network for inductively coupling the data signal between a signal line and a pair of current conductors of the power supply network.

It should be noted that it is high bit rate data that one

Carrier signal are modulated, which has a carrier frequency of over one MHz.

Furthermore, all conductors of a power supply network, ie. H. the phase conductors, the neutral conductor and any protective conductor, such as an earth conductor, are understood.

By inductively coupling the data signal, the coupling device can be made from cheaper materials, which means, for example, a great price advantage compared to the capacitive couplers. The coupling itself is also improved. Compared to capacitive coupling, coupling losses are reduced by about 20 to 30 dB. The invention already has a significantly improved coupling. However, in order to further improve this, an HF short circuit is advantageously provided at the coupling site. This includes, for example, a capacitance which is either connected between the two current conductors of the pair of current conductors or between each of the current conductors and a protective conductor, for example the earth conductor, of the power supply network. In addition to the capacity, an overcurrent fuse can optionally be connected in series with it.

The transverse capacitances of the HF short-circuits not only result in an improvement in the coupling factor, but also serve at the same time to ensure that the data signal only propagates in one direction on the power lines. RF interferences, which originate on the other side of the RF short-circuits, are blocked accordingly.

The data signal can be transmitted both in push-pull and in common mode. In the case of common mode operation, the data signal is only transmitted on a conductor, a defined potential, for example the potential of a protective conductor, being used as a reference.

In the case of push-pull operation, which is preferably used, the data signal is transmitted between two conductors of a transmission system and can be read, for example, at the end of the two conductors as a voltage difference as a function of time. The signal line therefore preferably has two signal lines for transmitting the data signal. To couple the data signal between the signal line and the two current conductors of a pair of current conductors, the coupling device has two coupling bodies made of a magnetic material. This material is, for example, ferrites, which are ceramic or single-crystalline substances.

Each coupling body is advantageously cylindrical in shape with an arbitrary base area, wherein it has a hole between the base area and the cover area. Other shapes of coupling bodies can also be used, but the selected cylindrical shape, especially if it is, for example, a straight cylinder a circular or square base area, facilitates the handling and assembly of the coupling body.

A coupling body is used to couple the data signal between one of the signal conductors and one of the current conductors of a pair of current conductors, both of which are looped through the hole in the coupling body for this purpose. The coupling body, the signal conductor and the current conductor together form a transformer, each with at least one turn on the primary and on the secondary side.

The size of the coupling body as well as that of its hole is matched to the corresponding conductor.

The coupling device can also be designed such that it can be used for coupling the data signal between the signal line and a plurality of pairs of current conductors. The coupling between one of the signal conductors and one of the current conductors of each pair of current conductors takes place as just described. Both are looped through the hole of a coupling body. If several pairs of current conductors are now present, each current conductor of each pair is looped through the hole of its own coupling body and one of the signal conductors is looped through the hole in each case one of the coupling bodies of a pair of current conductors and the other signal conductor through the hole of the other coupling body of the pair of current conductors.

So that the signal currents generated by the inductive coupling can flow within the signal line, the ends of the signal conductors, which have each been looped through the hole of one or more coupling bodies, are connected to one another. This can be a low-resistance connection, for example via ohmic resistors, but the signal conductors can also be connected by means of capacitors in such a way that they are low-resistance only for high-frequency signals. However, the signal conductors are advantageously connected directly to one another, ie galvanically short-circuited. This allows maximum signal currents in the signal line. So that the ends can be connected to each other, the data signal must be transmitted in push-pull mode. If this were not the case, no data signal could be transmitted in this case, since the currents in one direction do not match those in the other.

In a preferred variant of the coupling device, each coupling body consists of at least two partial bodies that can be assembled. For assembly, the partial bodies can be taken apart, placed around the desired conductors and put together again. The partial bodies are typically held together or even pressed together by a holding device. One-piece coupling bodies could also be installed, but for this the power lines would have to be disconnected, passed through the hole and then reattached to the correct location. However, this would make a power cut necessary. Thanks to the multi-part coupling body, this complex assembly work is no longer necessary. In particular with the so-called folding coupling bodies, which are installed in a housing and can be folded around a fixedly mounted power cable, the coupling bodies can be assembled simply and quickly.

The coupling body can for example be made without any air gap. So that they do not reach saturation so quickly even with high currents through the current conductors, they advantageously have an air gap which is larger the larger the saturation currents are supposed to be.

However, the inductance of the coupling body typically decreases with the enlargement of the air gap. This can result in the inductance of the coupling body becoming too small. Another material could be used for the coupling bodies to increase the inductance. In the invention, however, the inductance is increased again by simply connecting a plurality of coupling bodies in series. That is, the current conductor and the signal conductor are looped not only through one coupling body, but through two or even more coupling bodies. In a further preferred embodiment of the coupling device, each coupling body has a series resonance circuit. The coupling works without this resonance circuit, but it can be improved with it. The resonance circuit typically comprises only one winding through the hole in the coupling body, the winding being closed again via a capacitance. Of course, several turns can also be present. With this winding, the attenuation when coupling from one conductor to the other can be reduced, the resonance frequency with the capacitor being able to be matched to the desired transmission frequency of the data signal.

The transmission of data via a power supply network with the aid of such coupling devices now takes place as follows. With a first transceiver, a data signal with a carrier frequency above one MHz is generated from the data. The data can of course also be encoded, compressed or otherwise processed. A first signal line, on which the data signal is transmitted, is connected to the first transceiver. With a first coupling device according to the invention, the data signal is now coupled from the signal line to any pair of current conductors in a power supply network. In order to make the maximum signal currents flow, the two ends of the signal conductors, which are not connected to the transceiver, are connected to one another, as mentioned above. The data signal can propagate on the power supply network, the direction of propagation being determined by the HF short-circuits mentioned above. At the destination, the data signal is coupled from the current conductors to a second signal line with a second coupling device according to the invention, the ends of which are in turn connected to one another on one side and to a second transceiver on the other side. With the second transceiver, the original data can be recovered from the data signal.

Of course, the data signal transmitted on the power network can also be coupled out with other coupling devices and fed to a user. So For example, the capacitive couplers mentioned at the beginning could be used in the home for the end customer, since they can be connected to any socket. However, the coupling device according to the invention can of course also be integrated into a housing which can be plugged into a socket at the customer and which has the corresponding coupling body and in which the signal line is led to the outside. The transceiver could also be integrated into this housing.

A further application of the coupling device according to the invention is the possibility of bypassing a specific network area of the power supply network, for example an area with high attenuation. So that the data signal does not pass through this area and is attenuated accordingly, a coupling device is used to couple the data signal from the power supply network to a signal line. The signal line is then routed around this network area and on the other side of the network area a second coupling device is used to couple the data signal again from the signal line to the power supply network. In this case, the ends of the signal line are connected on both sides. The cross impedances of the RF short-circuits also present here on both sides of the network area have several advantages. First, they block high-frequency interference, which can originate from other power conductors as well as from the bypassed network area, then they result in improved coupling and finally they prevent the data signal from spreading on the power supply network into the network area to be bypassed.

From the following detailed description and the entirety of the claims, further advantageous embodiments and combinations of features of the invention result. Brief description of the drawings

The drawings used to explain the exemplary embodiment show:

Fig. 1 shows a schematically illustrated application of the inventive

Coupling device in a house connection box;

2 shows a further application of the coupling device according to the invention in a sub-distribution to a plurality of risers;

3 shows an application of the coupling device according to the invention for bypassing a floor distribution;

Fig. 4 shows an application of the coupling device according to the invention in the outdoor area for adapting the impedance between an overhead line and a

Service line;

Fig. 5 shows a plurality of coupling ferrites connected in series as well

6 shows a coupling ferrite with a series resonance circuit.

In principle, the same parts are provided with the same reference symbols in the figures.

Ways of Carrying Out the Invention

Figure 1 shows an application of the coupling device according to the invention. A house connection line 1 is shown in a house connection box, the phase conductors 2.1, 2.2 and 2.3 and the neutral / protective conductor 3 of which are each laid on a busbar 4.1, 4.2, 4.3 or 5. Two risers 6.1, 6.2, each with three phase conductors 7.1, 7.2, 7.3 or 7.4, 7.5, 7.6 and likewise one each, branch from the busbars 4.1, 4.2, 4.3, 5 Neutral / protective conductor 8 from. The phase conductors 7.1, 7.2, 7.3, 7.4, 7.5, 7.6 are each protected by an overcurrent fuse 9.

Furthermore, a first transmitter / receiver 10.1, for example a modem, is shown, to which a signal line 11 with two signal lines 11.1, 1.2 is connected. In order to couple a data signal between the house connection line 1 and the signal line 11, a coupling ferrite 12.1, 12.2 is further placed around the phase conductors 2.2 and 2.3, respectively, through which one of the two signal conductors 1 1.1 and 1 1.2 are also guided. For this purpose, the coupling ferrites 12.1, 12.2 each have a hole through which the phase conductors or the signal conductors can be looped. The signal conductors 1 1.1 and 1 1.2 are connected to each other after they are passed through the hole of each coupling ferrite 12.1, 12.2 so that the maximum signal current can flow.

In this example, coupling rings with a width in the range of approximately 10 to 30 mm, an outer diameter in the range of 20 to 40 mm and an inner diameter in the range of 10 to 30 mm are used as coupling ferrites 12.1, 12.2, with an air gap of the order of magnitude from 0.1 mm to about 2 mm. The size of the air gap depends on the ferrite material used and on the desired maximum saturation currents, with saturation currents of up to about 300 amperes being easily achieved. However, the inductance of the coupling ferrites decreases with the size of the air gap. With the size of the air gap and the number of coupling ferrites, both the inductance and the maximum saturation currents of the couplers can be set practically as desired.

To improve the signal coupling between the house connection line 1 and the signal line 1 1, an HF short circuit 13.1, 13.2, 13.3, ie a connection, is in each case between the phase conductors 7.1, 7.2, 7.3 of the riser 6.1 and the busbar 5 for the neutral / protective conductors. For example, a capacitance, which acts as a short circuit for high-frequency signals, is provided. In the example shown, this comprises a series connection of a capacitance and an overcurrent fuse, the capacitance being a high-frequency short circuit between a respective phase and the neutral / protective conductor serves. The overcurrent fuse is only inserted to protect the circuit. The HF short circuits 13.1, 13.2, 13.3 thus prevent the propagation of a data signal received on the house connection cable both on the riser 6.1 and on any other riser 6.2 which branch off from the busbars 4.1, 4.2, 4.3, 5.

The data signal decoupled from the house connection line 1 is processed by the transmitter / receiver 10.1, which is connected to a second transmitter / receiver 10.2, for example via Ethernet. A signal line 14 with two signal conductors 14.1, 14.2 is in turn connected to the transmitter / receiver 10.2. A corresponding data signal is coupled from the signal line 14 to the risers 6.1, 6.2. For this, further coupling ferrites 12.3, 12.4, 12.5, 12.6 are present, which are each laid around two phase conductors 7.2, 7.3, 7.5, 7.6 of the two risers 6.1, 6.2. By looping the signal conductors 14.1 or 14.2 through a coupling ferrite 12.3, and 12.6 or 12.4 and 12.5 of a riser 6.1 or 6.2 and then connecting them together.

The HF short circuits 13.1, 13.2, 13.3 thus also serve to improve the coupling between the signal line 14 and the risers 6.1, 6.2. In addition, they simultaneously prevent the spread of a data signal coupled into a riser 6.1, 6.2 in the direction of the house connection or block RF interferences which come from the other current conductors.

The interface between the two transmitters / receivers 10.1 and 10.2 effectively forms the interface between two PLC (powerline communication) lines, the first PLC line comprising the transmission of a data signal on the house connection line 1 and the second PLC line the transmission of the data signal on the Electricity grid within the house includes.

The coupling of the data signal naturally also works in the opposite direction, ie if a customer couples a data signal into the power supply network at a socket in the house, this will be on the second PLC line, ie the corresponding riser 6.1, 6.2, transmitted in the direction of the house connection, coupled to the signal line 14, transmitted from the transmitter / receiver 10.2 to the transmitter / receiver 10.1 and coupled from the signal line 11 to the first PLC route, namely the house connection line 1. The data signal is transmitted on the house connection line, for example, to the next transformer station, where it is decoupled from the house connection line and fed into an external communication system.

The situation in FIG. 2 is similar to that in FIG. 1. However, FIG. 2 shows only the indoor system with a transmitter / receiver 10.3, to which two signal lines 15, 16 with two signal conductors 15.1, 15.2 and 16.1, 16.2 are connected at the same time ,

In contrast to FIG. 1, four risers 6.3, 6.4, 6.5, 6.6 are connected to the busbars 4.1, 4.2, 4.3, 5, with one signal line 15 and 16 coupling the data signal onto two risers 6.3 and 6.4 or 6.5 and 6.6, respectively. For this, two coupling ferrites 12.7, 12.8, 12.9, 12.10, 12.1 1, 12.12, 12.13, 12.14 are available per riser, through which the corresponding phase conductors 7.7, 7.8, 7.1 1, 7.12, 7.13, 7.15, 7.17 and 7.18 are looped.

In this case too, HF short circuits 13.4, 13.5, 13.6, 13.7 are present. In contrast to FIG. 1, however, they are not provided here between the phase conductors and the neutral / protective conductor, but rather between the two phase conductors 7.7 and 7.8 or 7.1 1 and 7.12 or 7.13 and 7.15 or 7.17 and 7.18 each of a riser 6.3, 6.4, 6.5, 6.6 on which the data signal is coupled.

FIG. 3 shows a further application of the coupling device according to the invention. In this example, two coupling devices are used to bypass an area of the power supply network which has, for example, increased attenuation for high-frequency signals. Such an area is, for example, an electricity meter 17 in a floor distribution together with the busbars 4.1, 4.2, 4.3 and 5 and the overcurrent protection devices 9 in the output area of the electricity meter 17. The phase conductors 7.1, 7.2, 7.3 and the neutral / protective conductor 8 of the riser are routed to the input of the electricity meter 17. The corresponding outputs for the phase conductors lead to busbars 4.1, 4.2, 4.3, from which, each protected by an overcurrent fuse 9, the individual phase conductors branch off for the individual rooms in an apartment! The Neutra I / protective conductor 8 for the individual rooms are routed around the electricity meter 17 and can be tapped off from their own busbar 5.

In order to be able to bypass the area of the electricity meter 17, including the busbars 4.1, 4.2, 4.3 and the overcurrent protection devices 9, which have a high level of attenuation for HF signals, the data signal is now extracted from the device using two coupling ferrites 19.1, 19.2

Riser line 6.1 coupled to a signal line 18 with the signal conductors 18.1, 18.2.

^• Between the two phase conductors 7.2, 7.3, from which the data signal is coupled out, an HF short circuit 13.8 is again provided, which not only improves the coupling but also prevents the data signal from spreading in the direction of the electricity meter 17.

As coupling ferrites 19.1, 19.2, 19.3, 19.4, cube-shaped coupling bodies with an edge length of approximately 10 to 35 mm and a hole diameter in the range of 3 to 20 mm are used in this example, with an air gap of the order of magnitude of 0.1 mm to approximately 2 mm exhibit. The inductance of the couplers and the maximum saturation currents can also be set here with the number of coupling ferrites, the choice of ferrite material and the size of the air gap.

The signal line 18 is routed around the unwanted network area and behind this area of increased attenuation, the data signal can be specifically coupled back onto those phase conductors 7.19, 7.21 where it is needed by the customer. At this point it should be mentioned that the data signal is transmitted on phase conductors 7.19 and 7.21 in common mode, since it is only coupled onto one conductor at a time. The neutral / protective conductor 8, for example, serves as a reference when tapping the data signal in the respective target areas. In FIG. 3, the phase conductor 7.19 covers, for example the living room / corridor area and the phase conductor 7.21 the working / bedroom area. An HF short circuit 13.9 is again provided between these two phase conductors, which not only improves the coupling and blocks HF interference from outside, for example from the electricity meter 17 or from the other phase conductors 7.20, 7.22, 7.23, 7.24, but also the propagation of the data signal back towards the electricity meter 17 and thus also on the remaining phase conductors 7.20, 7.22, 7.23, 7.24 prevented.

A further application of the invention is shown in FIG. 4 shows schematically an impedance matching in an overhead line 20. This comprises a plurality of masts 21, on each of which two overhead lines 20.1, 20.2 are suspended. An impedance of the order of magnitude of approximately 600 ohms is present between the overhead conductors 20.1, 20.2. If the overhead line 20 is now to be routed into a house, the overhead lines 20.1, 20.2 are brought together to form a house connection line 22, the impedance between the two lines being reduced to approximately 100 ohms. This is such a large difference in impedance that it can lead to problems. For example, reflections can occur at the transitions, which means that only a small amount of signal energy can be transmitted.

In order to compensate for this difference in impedance somewhat, a data signal transmitted on the overhead line 20 is coupled to the signal lines 23.1, 23.2 before the leads 20.1, 20.2 are brought together, the signal line having a defined impedance of, for example, 100 ohms. For this purpose, coupling ferrites 12.15 and 12.16 are used, which are placed around the free conductors 20.1, 20.2, the signal conductors 23.1, 23.2 being looped through the hole in the coupling ferrites 12.15, 12.16 not only once, but at least twice each, in contrast to the previous examples , Here, too, an RF short circuit 13.10 is provided between the two overhead lines 20.1, 20.2, which improves the coupling on the one hand and blocks interference on the other hand and prevents the further propagation of the data signal in the direction of the house connection line 22 on the overhead line 20. Before the free conductors 20.1, 20.2 are then brought together to form the house connection line 22, the data signal is again coupled from the signal line 23 to the free conductors 20.1, 20.2. For this purpose, two coupling ferrites 12.17, 12.18 are used, which are placed around the two free conductors 20.1, 20.2 shortly before they are brought together, and a signal line 23.1, 23.2 is passed through each of the holes.

Since the signal conductors 23.1, 23.2 are looped only once through the hole of the coupling ferrites 12.17, 12.18, there is an impedance matching of 1 to 4.

With the help of the invention, the impedance difference could thus be reduced from 6 to 1 to approximately 6 to 4.

FIG. 5 shows an example of a coupling device in which a plurality of coupling ferrites 24.1, 24.2, 24.3, 24.4 are connected in series. A current conductor 25 and a signal conductor 26 are looped through the coupling ferrites 24.1, 24.2, 24.3, 24.4, between which a data signal is to be coupled. The coupling ferrites 24.1, 24.2, 24.3, 24.4 each have an air gap 27 which increases the saturation current of each coupling ferrite, but at the same time reduces its impedance. To increase the overall impedance, four coupling ferrites 24.1, 24.2, 24.3, 24.4 are simply connected in series.

FIG. 6 shows a further possibility for improving the coupling factor. A coupling ferrite 28 with an air gap 27 is supplemented with a resonance which only consists of a turn 29 of a wire which is closed by a capacitance 30. The winding 29 with the capacitance 30 forms a series resonance circuit, the resonance frequency of which depends on the size of the capacitance 30 on the transmission frequency, i. H. the carrier frequency of the data signal, which is above 1 MHz, can be tuned.

In summary, it can be stated that the invention allows an efficient coupling of a high-frequency data signal between a signal line and (at least) one

Reach pair of power conductors of a power supply network. At the same time, the spreading of the data signal due to RF short circuits in certain directions be limited, which generally reduces the interference in such powerline systems and brings many advantages with regard to corresponding regulatory aspects. At the same time, interference from outside is blocked, which enables better transmission.

Claims

claims

1. Coupling device for coupling or decoupling a data signal with a carrier frequency of over one MHz into or from a power supply network, characterized in that it is used for inductive coupling of the data signal between a signal line and at least one pair of current conductors, each with two current conductors of the

Power supply network is formed.

2. Coupling device according to claim 1, characterized in that it has an RF short-circuit at the location of the coupling to improve the coupling, which in particular has a capacitance and optionally an overcurrent protection in series connection between the two current conductors of a pair of current conductors or between each of the current conductors and a protective conductor of the power supply network.

3. Coupling device according to claim 1 or 2, characterized in that the signal line has two signal conductors and the coupling device comprises two coupling bodies made of a magnetic material, in particular of ferrite, each coupling body being cylindrical in shape with any base or cover surface between the base and top surfaces have a hole and a coupling body is used for coupling the data signal between one of the signal conductors and one of the current conductors of a pair of current conductors, in that one of the current conductors of a pair of current conductors and one of the signal conductors are looped through the hole of each coupling body.

4. Coupling device according to claim 3, characterized in that it is designed for coupling the data signal between a signal line and a plurality of conductor pairs, each conductor being looped through the hole of each coupling body and one of the signal conductors through the hole in each case one the coupling body of each pair of current conductors and the other signal conductor is looped through the hole of the other coupling body of each pair of current conductors.

5. Coupling device according to one of claims 3 or 4, characterized in that the signal conductors are connected to one another at one end.

6. Coupling device according to one of claims 3 to 5, characterized in that each coupling body consists of at least two partial bodies which can be assembled and which are held together in particular by a holding device for easier assembly.

7. Coupling device according to one of claims 3 to 6, characterized in that each coupling body has an air gap to increase a saturation current.

8. Coupling device according to one of claims 3 to 7, characterized in that a plurality to increase an inductance. of coupling bodies are connected in series.

9. Coupling device according to one of claims 3 to 8, characterized in that each coupling body to improve the coupling has a series resonance circuit, which comprises a winding through the hole of the coupling body, the winding having a capacitance.

10. A method for transmitting data via a power supply network, characterized in that from the data with a first transceiver generates a data signal with a carrier frequency above MHz, the data signal is transmitted on a first signal line, from the first signal line with a first coupling device coupled to a pair of conductors of the power supply network according to claim 1, coupled to a second coupling device according to claim 1 from the pair of conductors to a second signal line, via the second signal line is transmitted to a second transceiver and that the data is recovered from the data signal with the second transceiver.

11. Arrangement for the transmission of data between a first and a second transceiver, characterized in that it has a first signal line connected to the first transceiver, a first coupling device according to claim 1 for coupling the data signal between the first signal line and a pair of conductors of the power supply network, a second coupling device according to claim 1 for coupling the data signal between the pair of conductors and a second signal line connected to the second transceiver, wherein the first transceiver for

Generation of a data signal from the data and the second transceiver are designed to recover the data from the data signal.

12. Arrangement for the transmission of a data signal via a power supply network, characterized in that it is designed to bypass a specific network area of the power supply network, in particular a high attenuation area, by a first coupling device according to claim 1 for coupling the data signal between a pair of current conductors leading to the network area and a signal line and a second coupling device according to claim 1 for coupling the data signal between the signal line and a pair of conductors leading away from the network area.