WO2009124560A1 - Appareil de communication et réseau - Google Patents

Appareil de communication et réseau Download PDF

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Publication number
WO2009124560A1
WO2009124560A1 PCT/EP2008/002775 EP2008002775W WO2009124560A1 WO 2009124560 A1 WO2009124560 A1 WO 2009124560A1 EP 2008002775 W EP2008002775 W EP 2008002775W WO 2009124560 A1 WO2009124560 A1 WO 2009124560A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication device
interface module
transformer
network
network connection
Prior art date
Application number
PCT/EP2008/002775
Other languages
German (de)
English (en)
Inventor
Stefan Klehr
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/EP2008/002775 priority Critical patent/WO2009124560A1/fr
Publication of WO2009124560A1 publication Critical patent/WO2009124560A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
    • H01F19/06—Broad-band transformers, e.g. suitable for handling frequencies well down into the audio range
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/16—Toroidal transformers

Definitions

  • the invention relates to a communication device with a network connection, wherein for transmitting data output signals of an interface module to the network connection of the interface module having a multi-turn primary winding of a transformer and the network connection with a multi-turn secondary winding of the transformer is connected to the. Furthermore, the invention relates to a network with a plurality of communication devices.
  • Communication devices can be combined to form a network, for example via Twisted Pair Ethernet lines, which are connected via an Ethernet connection.
  • a network for example via Twisted Pair Ethernet lines, which are connected via an Ethernet connection.
  • it is necessary to consider all possible circuits which may arise in the entire network, for example by superposing possible voltages and / or currents. Due to the multitude of combinations, this approach presents the network's observer responsible for the explosion protection with a computationally intensive and non-economic error consideration of such a network.
  • This holistic view of all electrical circuits and thus all interconnected devices with a coordinated limitation of the overall performance has proven to be very complex.
  • Another prior art solution such as e.g. An optical fiber-based Ethernet, ie a network with fiber optic galvanic isolation, has the disadvantage that the communication devices and the necessary optical waveguides are very cost-intensive.
  • the object is achieved in that for a network which is to be operated in a hazardous environment, a communication device having the features of claim 1 is used.
  • the interface module In the communication device with a network connection, wherein for transmitting data output signals of an interface module to the network port, the interface module is connected to a primary winding of a transformer and a secondary winding of the transformer is connected to the network connection, wherein the primary and secondary windings have a common core
  • the turns of the primary winding to the turns of the secondary winding are arranged in a minimum distance.
  • This minimum distance may preferably be 160 ⁇ m, preferably more than 167 ⁇ m, in particular more than 180 ⁇ m, in particular more than 200 ⁇ m, in particular more than 500 ⁇ m. So there should be a defined minimum distance between the times, this is to be accomplished for example by insulation material.
  • the turns of the primary winding should preferably have an insulating material with a thickness of 180 microns. If several communication devices are connected to each other via so-called intrinsically safe network connections in a potentially explosive environment, a safety-related consideration must be carried out. This means that all possible circuits, which can arise via connecting lines between the communication devices, are evaluated for their ignitability.
  • a transformer module is a module with several transformers, eg a combination of individual transformers for a transmission path and a combination of several individual transformers for a reception path.
  • the transformer module can be regarded as an exchangeable, complex part, which forms a closed functional unit.
  • the transmission module can also combine several transmitters for several network connections.
  • the data output signals of the interface module are electrically isolated from the network connection by the transformer module.
  • each communication device which is present in the network has a transformer module for galvanic isolation.
  • the transformer or the transformer module can be regarded as a component with a countable error for error consideration.
  • link segment under "worst-case" conditions, for example, with a maximum segment length of 100 m, a maximum inductance of the cable of, for example, 0.2 microns / 100 m, so you can perform an exemplary safety assessment and transfer the result to additional link segments.
  • a network constructed with such link segments can then be considered secure.
  • a longitudinal switch between the interface module and the transformer module is required. derstand arranged in a series circuit.
  • a four-wire Ethernet cable is arranged as the connection of two communication devices to form a link segment.
  • Each communication device has a network connection, so that the Ethernet signals carry the following transmission path: Interface module - transmitter module - network connection - Ethernet cable - network connection - transmitter module - interface module.
  • an inductance of the transformer module decreases with increasing current.
  • the effective inductance in the safety-relevant circuit is just then low when safety-related currents flow.
  • This effect allows the use of larger ignition limit curves for inductive circuits. Thanks to the higher ignition limit curves, it is preferable for series resistors having a resistance value in the range of a few ohms to be sufficient. These series resistors are advantageously connected to a TX or RX output of the interface module and connect the TX or RX line to the transmitter module.
  • a limiting means is arranged for limiting the current and voltage of data input signals for the interface module.
  • Such limitation means which are also called barriers, limit at all device-side terminals of the interface module the incoming currents in the interface module and voltages to certain maximum values, such as 240 mA and 4 V.
  • This can be an intrinsically safe communication device as defined in current and voltage limited Unit, which is also galvanically isolated from other communication devices.
  • the devices connected in the link segment are nevertheless not galvanically connected to one another, for example in the case of a short-circuit of a transformer module, since the link corresponding to the short-circuited transformer module.
  • transmitter module maintains galvanic isolation. Circuit overlays due to a faulty interconnection of two communication devices via an Ethernet cable can therefore not occur because at least one of the two transformer modules is safely galvanically isolated.
  • a communication device is equipped with a limitation of a supply voltage for the interface module.
  • a current limiter is connected in a supply line of the supply voltage for the interface module.
  • an electronic current and voltage limitation with a rectangular characteristic or a trapezoidal characteristic.
  • the communication device has a transformer module with a transmission bandwidth of 0.1 to 100 MHz. Especially for networks with large amounts of data, a large transmission bandwidth is an advantage.
  • the electrical conductor of the primary winding or that of the secondary winding has a solid insulating material.
  • a material made of Teflon favors the high-frequency properties of a transformer module and keeps the losses low.
  • a "solid" insulation material is required for transformers, preferably a "solid” insulation material with Teflon can be realized.
  • a powerful communication network which permits high transmission data, is used to advantage in a potentially explosive environment.
  • This network has communication devices with the aforementioned advantages.
  • at least two communication devices are interconnected via Ethernet lines and form an independent intrinsically safe segment.
  • FIG. 1 shows a transformer module
  • FIG. 2 shows minimum distances of different windings to the transformer module
  • FIG. 3 shows a transmission path
  • FIG. 4 shows a network with communication devices.
  • a transformer 10 for the galvanic isolation of output signals of an interface module 320 explained in greater detail in FIG. 3 is represented by a wired network.
  • a primary winding 14 and a secondary winding 16 are applied on a designed as a ring core 12.
  • the primary winding 14 is shown as a somewhat thicker conductor than the conductor of the secondary winding 16.
  • the primary winding 14 and the secondary winding 16 are wound as a bundle around the annular core 12 of the transformer 10.
  • the conductors of the primary winding 14 and the secondary winding 16 on crossing points. At these crossing points, a minimum distance of about 0.2 mm to the conductor of the primary winding is maintained by an insulating layer applied to the conductor of the primary winding. This minimum distance is maintained by the insulating layer also to the core 12, so that meets the
  • Transformer 10 the condition that for a safety-related consideration according to the standard EN 60079-11, the transformer may be considered as a component with a "countable" error.
  • the core 12 has a highly permeable core material.
  • FIG. 2 is a schematic representation of the arrangement of a first embodiment of the primary winding 14 and the secondary winding 16 of FIG. 1 to illustrate the minimum distance between the two conductors.
  • th winding wire 22 to a second winding wire 24 corresponds to the conductor of the primary winding 14 and the second winding wire 24 corresponds to the conductor of the secondary winding 16, wherein in this embodiment, an insulation 26 of the same thickness for both winding wires 22 and 24 has been selected.
  • the distances x, y and z in this case represent the layer thicknesses of the insulating material.
  • the layer thicknesses x, y and z can be configured in various variations and combinations.
  • a transmission path 300 is shown.
  • the transmission path 300 shows the path of a connection, starting from an interface module 320 of a communication device 400, as shown in detail in FIG. 4, to another communication device 401, wherein only the transmitter module 360 of the further communication device 401 is shown in this illustration.
  • the interface module 320 provides data output signals via its TX + and TX- ports.
  • Data output signals are fed to the transmitter module 360 via series resistors 330.
  • the series resistors 330 have a value of 2.5 ohms.
  • the transformer module 360 is configured in this embodiment of several transformers according to FIG. A transmitter for a transmission direction TX and a transmitter for a reception direction RX.
  • a cable route 370 is connected to the respective network connection sides of the transmission module 360 or 360'. This cable route 370 is designed as a twisted pair Ethernet cable in a four-wire version.
  • the interface module 320 receives data input signals via a seven-wire RMII bus 380. These data input signals are limited by a limiting means 310 in current and voltage. Via the interface module 320, the limiting means 310 prevents critical currents and voltages from entering the signal path between two communication devices. A possible ignition by possibly skipping discharge sparks in a hazardous area is thus avoided.
  • a voltage limiter 305 limits the supply voltage VCC necessary for the communication device.
  • the communication devices are galvanically isolated from each other.
  • the transmission path for fail-safe viewing can be considered as a link segment.
  • FIG. 4 shows a network 410 with Ethernet cables 430 for operation in a potentially explosive environment.
  • a first communication device 401, a second communication device 402, a third communication device 403 and a fourth communication device 404 are connected in a star shape via the Ethernet cable 430.
  • the fourth communication device 404 has in this example two network ports 420, which are designed as Ethernet ports. This dual version of the Ethernet ports allows networking as a line structure. For networking as a line structure, it is crucial that the fourth communication device 404 has a transmitter module 360 for each signal path. By means of these transformer modules 360, the galvanic separations of the individual link segments 440 are ensured.
  • the internal structure of the communication devices 401 to 404 will be explained using the example of the first communication device 401.
  • the first communication device 401 has the interface module 320 already described with FIG Barrier for the power supply 310a, the supply voltage applied to the interface module 320 is limited to current and voltage.
  • Another barrier to the data supply 310b limits the currents and voltages associated with the data input signals to the interface device 320 with respect to their maximum currents and voltages.
  • the data output signals of the interface module 320 can thus be fed to the network connection 420 via the transmitter module 360 with intrinsically safe current and voltage values.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

L'invention concerne un appareil de communication (401) comportant une connexion réseau (420). Pour le couplage de signaux de sortie de données d'un composant interface (320) à la connexion réseau (420), le composant interface (320) est connecté à une bobine primaire (14) d'un transmetteur (10, 360), présentant plusieurs enroulements, et la connexion réseau (420) est connectée à une bobine secondaire (16) du transmetteur (10, 360), présentant plusieurs enroulements, la bobine primaire et la bobine secondaire (14, 16) comportant un noyau commun (12). Pour augmenter le niveau de sécurité dans un environnement présentant un risque d'explosion, les enroulements de la bobine primaire (14) présentent un espace minimal par rapport aux enroulements de la bobine secondaire (16).
PCT/EP2008/002775 2008-04-08 2008-04-08 Appareil de communication et réseau WO2009124560A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/002775 WO2009124560A1 (fr) 2008-04-08 2008-04-08 Appareil de communication et réseau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/002775 WO2009124560A1 (fr) 2008-04-08 2008-04-08 Appareil de communication et réseau

Publications (1)

Publication Number Publication Date
WO2009124560A1 true WO2009124560A1 (fr) 2009-10-15

Family

ID=40243562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/002775 WO2009124560A1 (fr) 2008-04-08 2008-04-08 Appareil de communication et réseau

Country Status (1)

Country Link
WO (1) WO2009124560A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214789C1 (en) * 1992-05-04 1993-07-15 Wolf 8000 Muenchen De Buchleitner Transformer for high frequency applications - has annular ferrite core wound with pair of wire coils with core and components mounted on PCB
DE10105269A1 (de) * 2001-02-02 2002-08-08 Abb Patent Gmbh Eigensichere Begrenzerkaskade
US20050243483A1 (en) * 2004-04-28 2005-11-03 Bel-Fuse Differential electrical surge protection within a LAN magnetics interface circuit
US20070040645A1 (en) * 2005-08-19 2007-02-22 Sedio Stephen M Transformer And Method Of Winding Same
WO2007025725A1 (fr) * 2005-08-30 2007-03-08 Phoenix Contact Gmbh & Co. Kg Transformateur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4214789C1 (en) * 1992-05-04 1993-07-15 Wolf 8000 Muenchen De Buchleitner Transformer for high frequency applications - has annular ferrite core wound with pair of wire coils with core and components mounted on PCB
DE10105269A1 (de) * 2001-02-02 2002-08-08 Abb Patent Gmbh Eigensichere Begrenzerkaskade
US20050243483A1 (en) * 2004-04-28 2005-11-03 Bel-Fuse Differential electrical surge protection within a LAN magnetics interface circuit
US20070040645A1 (en) * 2005-08-19 2007-02-22 Sedio Stephen M Transformer And Method Of Winding Same
WO2007025725A1 (fr) * 2005-08-30 2007-03-08 Phoenix Contact Gmbh & Co. Kg Transformateur

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