EP1719688A1 - Data communication system for railway vehicles - Google Patents

Data communication system for railway vehicles Download PDF

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Publication number
EP1719688A1
EP1719688A1 EP06090035A EP06090035A EP1719688A1 EP 1719688 A1 EP1719688 A1 EP 1719688A1 EP 06090035 A EP06090035 A EP 06090035A EP 06090035 A EP06090035 A EP 06090035A EP 1719688 A1 EP1719688 A1 EP 1719688A1
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EP
European Patent Office
Prior art keywords
train
data communication
communication system
car
control
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EP06090035A
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German (de)
French (fr)
Inventor
Himar Gensert
Freddy Pilorge
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Faiveley Transport Leipzig GmbH and Co KG
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Faiveley Transport Leipzig GmbH and Co KG
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Publication of EP1719688A1 publication Critical patent/EP1719688A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D27/00—Heating, cooling, ventilating, or air-conditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
    • B61L15/0018—Communication with or on the vehicle or vehicle train
    • B61L15/0036—Conductor-based, e.g. using CAN-Bus, train-line or optical fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
    • B61L15/0081—On-board diagnosis or maintenance

Definitions

  • the invention relates to a data communication system for rail vehicles, which has one or more redundancies, in particular in the car or train, by a car or train bus and intelligent input and output modules.
  • the data communication system according to the invention relates here to climate control and regulation systems in rail traffic, whereby a redundant system is created by a modular and decentralized circuit in conjunction with intelligent modules, whereby the system components are reduced.
  • redundancy should be understood as the creation of additional, sometimes redundant, information or functions that are deliberately created for the purpose of fault tolerance. In case of failure of special components whose function is taken over by others, in the event of failure of which, in turn, possibly from others.
  • the term "zero redundancy" means lack of redundancy.
  • the climate controller (CR) - and information and diagnostic interfaces (LID) - circuit is usually "classical" constructed (see Figure 2).
  • Each HVAC is locally connected to a Train Information and Control System (TMS) via the LID connection (primarily to a CAN, MVB, LON, Ethernet ... fieldbus).
  • TMS Train Information and Control System
  • This requires at least one LID connection per car and air conditioning system (more if the system is to be redundant).
  • TMS and CID At the information, diagnostic and Maintenance systems (TMS and CID) of the train, this known circuit for redundancy and cost described in Figure 2 also proves to be disadvantageous. Any malfunction or network interruption (TMS) involves the risk of an immediate loss of information between the different cars; with a zero redundancy the comfort behavior is disturbed.
  • Each car must be equipped with an LID (MVB or LON port, for example), which greatly affects the overall cost of the system.
  • EP 1 010 601 B1 is a data communication system on the train, with a train bus for communication between vehicles of the train and each vehicle associated vehicle bus systems known, each via a gateway to the train bus are coupled, wherein at least one vehicle, a master function for control in the train is accepted. It is intended to protect the redundancy of a vehicle bus as a master vehicle bus, if at least one further vehicle bus is arranged as a master vehicle bus parallel to the master vehicle bus, which is exclusively coupled to system components with primary control value generating functions.
  • the circuit according to the invention according to FIG. 4a expands the previous concept not only on the individual wagon but also on the entire train, the aim being to ensure a redundancy of the exchange of information via TMS and to reduce the number of LIDs and possibly MC interfaces.
  • Figure 4a shows a system for reducing the LID to two units on the entire train.
  • Each car has a local climate controller (CR). If one CR fails, the control can be taken over by another CR according to FIG. 4b. If all CRs fail, the central train computer can take control (see FIG. 4c), or the situation described in the above-mentioned section occurs according to FIG. 3c. In the event of failure of the CAN network, the situation described in the above-mentioned section according to FIG. 3c occurs: -> two-fold redundancy.

Abstract

The data communication system has input and output modules which are arranged in the vehicle or traction intelligent, which are connected by a modular or decentralized circuit with a vehicle or a traction bus system whereby a single or repeated redundancy of the system is formed.

Description

Die Erfindung betrifft ein Datenkommunikationssystem für Schienenfahrzeuge, welches eine oder mehrere Redundanzen aufweist, insbesondere im Wagen oder Zug, durch einen Wagen oder Zugbus sowie intelligente Ein- und Ausgabebaugruppen. Das erfindungsgemäße Datenkommunikationssystem bezieht sich dabei auf Klimasteuerungs- und Regelungssysteme im Schienenverkehr, wobei durch eine modulare und dezentrale Schaltung in Verbindung mit intelligenten Baugruppen Redundanz des Systems entsteht, wodurch die Systemkomponenten reduziert werden. Unter Redundanz soll in diesem Zusammenhang das Anlegen zusätzlicher mitunter überflüssiger Informationen oder Funktionen verstanden werden, die zum Zweck der Fehlertoleranz bewusst angelegt werden. Bei Ausfall von besonderen Komponenten wird deren Funktion von anderen übernommen, beim Ausfall derer wiederum eventuell von weiteren. Der Begriff "Null - Redundanz" bedeutet fehlende Redundanz.The invention relates to a data communication system for rail vehicles, which has one or more redundancies, in particular in the car or train, by a car or train bus and intelligent input and output modules. The data communication system according to the invention relates here to climate control and regulation systems in rail traffic, whereby a redundant system is created by a modular and decentralized circuit in conjunction with intelligent modules, whereby the system components are reduced. In this context, redundancy should be understood as the creation of additional, sometimes redundant, information or functions that are deliberately created for the purpose of fault tolerance. In case of failure of special components whose function is taken over by others, in the event of failure of which, in turn, possibly from others. The term "zero redundancy" means lack of redundancy.

Die aktuellen Steuerungskonzepte im Schienenverkehr mit einer Systemsteuerung am Wagen stützten sich auf eine "zentralisierte" Schaltung. Alle funktionsentscheidenden Regler des Heizungs- und Klimasystems wie Relais, Schütze, Sensoren (TS) usw. sind mit einem Hauptklimaregler verbunden, um die Datenerfassung und Systemregelung zu gewährleisten (siehe Figur 1).
Die Schaltung hat ein relativ einfaches und leicht umsetzbares Konzept. Sie weißt jedoch zwei gravierende Schwachstellen in der Redundanz und der Verkabelung auf:

  • Wenn der Klimaregler defekt ist, fällt das gesamte Heizungs- und Klimasystem (HVAC) aus.
  • Die Verkabelung einer solchen "sternförmigen" Schaltung zwingt zur Verlegung von Anschlüssen (DI, DO, AI ...) zwischen jeder Systemkomponente und dem Klimaregler CR. Bekanntermaßen hat ein Wagen im Allgemeinen eine durchschnittliche Länge von 15 bis 25 Metern. Daraus folgt, dass einige Kilometer Kabel verlegt werden
  • müssen. Diese Verkabelung ist sehr anfällig auf elektromagnetische Störungen (PEM), die in einem Schienenfahrzeug häufig vorgefunden werden, wobei die Empfindlichkeit mit der Länge zunimmt. Die digitalen und analogen Informationen können somit leicht verfälscht werden, wenn keine Maßnahmen (CEM) gegen diese Störungen getroffen werden. Es ist selbstredend, dass diese Vorsichtsmaßnahmen entscheidende Mehrkosten in der Konzeption des elektrischen Systems und den Kabelbündeln mit sich bringen. Die Kosten für die Sternverkabelung (Material und Einbau) sind ebenso erheblich.
The current control concepts in rail transport with a system control on the car were based on a "centralized" circuit. All function-critical controllers of the heating and air conditioning system such as relays, contactors, sensors (TS), etc. are connected to a main climate controller to ensure data acquisition and system control (see Figure 1).
The circuit has a relatively simple and easy to implement concept. However, it has two serious weaknesses in redundancy and cabling:
  • If the climate controller is faulty, the entire heating and air conditioning system (HVAC) fails.
  • The wiring of such a "star-shaped" circuit forces the laying of terminals (DI, DO, AI ...) between each system component and the climate controller CR. As is known, a car generally has an average length of 15 to 25 meters. It follows that a few kilometers of cables are laid
  • have to. This cabling is very susceptible to electromagnetic interference (PEM), which is common in rail vehicles, with sensitivity increasing with length. The digital and analog information can thus easily be falsified if no measures (CEM) are taken against these disturbances. It goes without saying that these precautionary measures entail significant additional costs in the design of the electrical system and the cable bundles. The costs for star wiring (material and installation) are also considerable.

Bei einer Systemsteuerung am Zug ist die Klimaregler (CR) - und Informations- und Diagnoseschnittstellen (LID) - Schaltung üblicherweise "klassisch" aufgebaut (siehe Figur 2).
Jede Heizungs- und Klimaanlage (HVAC) ist lokal über den LID-Anschluss an ein Zuginformations- und Kontrollsystem (TMS) angeschlossen (vorrangig an einen Feldbus des Typs CAN, MVB, LON, Ethernet ...). Dies setzt mindestens einen LID-Anschluss pro Wagen und Klimasystem voraus (mehrere, wenn das System redundant sein soll). An den Informations-, Diagnose- und
Instandhaltungssystemen (TMS und CID) des Zuges erweist sich diese in Figur 2 beschriebene bekannte Schaltung für Redundanz und Kosten ebenfalls als nachteilig. Jede Störung oder Netzunterbrechung (TMS) birgt die Gefahr eines sofortigen Informationsverlustes zwischen den verschiedenen Wagen; bei einer Null-Redundanz ist das Komfortverhalten gestört. Jeder Wagen muss mit einem LID ausgerüstet sein (MVB oder LON Anschluss beispielsweise), was die Gesamtkosten des Systems stark beeinflusst.In a system control on the train the climate controller (CR) - and information and diagnostic interfaces (LID) - circuit is usually "classical" constructed (see Figure 2).
Each HVAC is locally connected to a Train Information and Control System (TMS) via the LID connection (primarily to a CAN, MVB, LON, Ethernet ... fieldbus). This requires at least one LID connection per car and air conditioning system (more if the system is to be redundant). At the information, diagnostic and
Maintenance systems (TMS and CID) of the train, this known circuit for redundancy and cost described in Figure 2 also proves to be disadvantageous. Any malfunction or network interruption (TMS) involves the risk of an immediate loss of information between the different cars; with a zero redundancy the comfort behavior is disturbed. Each car must be equipped with an LID (MVB or LON port, for example), which greatly affects the overall cost of the system.

In der DE 4307 897 A1 wird eine Steuerungs- und Kontrolleinrichtung in zu einem Zugverband zusammengestellten Schienenfahrzeugen beschrieben, wobei durch Verschaltung von Steuerungs- und Diagnoseeinrichtungen Redundanz in der Bedienung durch zusätzliche fahrzeugeigene Steuergeräte erzeugt wird.In the DE 4307 897 A1 a control and monitoring device is described in combined to form a train rail vehicles, being created by interconnection of control and diagnostic redundancy in the operation of additional on-board control units.

Aus der EP 1 010 601 B1 ist ein Datenkommunikationssystem im Zug, mit einem Zugbus zur Kommunikation zwischen Fahrzeugen des Zuges und jedem Fahrzeug zugeordneten Fahrzeugbussystemen bekannt, die über jeweils ein Gateway an den Zugbus angekoppelt sind, wobei von wenigstens einem Fahrzeug eine Master-Funktion zur Steuerung im Zug übernehmbar ist. Es soll darin die Redundanz eines Fahrzeugbusses als Master-Fahrzeugbus geschützt werden, wenn parallel zum Master-Fahrzeugbus mindestens ein weiterer Fahrzeugbus als Master-Fahrzeugbus angeordnet ist, der ausschließlich auf Systemkomponenten mit primär Stellwert erzeugenden Funktionen gekoppelt ist.From the EP 1 010 601 B1 is a data communication system on the train, with a train bus for communication between vehicles of the train and each vehicle associated vehicle bus systems known, each via a gateway to the train bus are coupled, wherein at least one vehicle, a master function for control in the train is accepted. It is intended to protect the redundancy of a vehicle bus as a master vehicle bus, if at least one further vehicle bus is arranged as a master vehicle bus parallel to the master vehicle bus, which is exclusively coupled to system components with primary control value generating functions.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, die im vorausgehenden Absatz beschriebenen Schwachstellen der gegenwärtig bekannten Datenkommunikationssysteme für Klimasteuerungs- und Regelungssysteme, wie fehlende Redundanz (Null-Redundanz), sensible Verkabelung und hohe Kosten, zu überwinden.It is an object of the present invention to overcome the deficiencies of the currently known data communication systems for climate control systems such as lack of redundancy, sensitive cabling and high costs described in the previous paragraph.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den zugehörigen Ansprüchen enthalten.
Die Erfindung beinhaltet demnach ein Datenkommunikationssystem für Klimasteuerungs- und Regelungssysteme in Schienenfahrzeugen, wobei im Wagen oder Zug intelligente Ein- und Ausgabemodule (IO) angeordnet sind, die durch eine modulare und dezentrale Schaltung mit einem Wagen- und/oder Zugbussystem (CAN, TMS) verbunden sind, wodurch eine Redundanz des Systems entsteht.
Die Vorteile der Erfindung werden anhand der Zeichnungen und den nachfolgenden Ausführungsbeispielen näher beschrieben.
Die in den Fig. 3a und 3b dargestellten Schaltungen sind modular und dezentral und betreffen die Systemsteuerung am Wagen.
Jedes Modul (IO) und jeder Sensor ist über ein lokales CAN-Netz (Control area network) mit einem zentralen Regler (Hauptregler MC) (Fig. 3a) oder direkt mit dem Zugnetz (TMS) verbunden, wenn beide Netze miteinander kompatibel sind (Fig.3b).
Der Vorteil dieser Lösung besteht in drei Punkten:

  1. 1. Die Verkabelung ist geringer, da sich jedes Modul physisch «so nah wie möglich» am Steuerungsbauteil befindet. Die Module sind untereinander nur mit einer 2adrigen lokalen CAN "Schleife" verbunden.
  2. 2. Die Verringerung der Kabellänge hat deutlichen Einfluss auf eine verbesserte CEM an den Steuerbauteilen und dem lokalen Netz, das sozusagen unempfindlich auf Störungen (PEM) wird, da es sich um ein Netz kompletter Informationen (frames) handelt, einschließlich Kontrolle der Sendung, des Empfanges und der Integrität der Daten (trifft auf einen 2adrigen Ein-Aus-Anschluss zum Beispiel nicht zu).
  3. 3. Bei Unterbrechung des lokalen CAN-Netzes oder einem versagenden MC verfügt jedes I/OModul über eigene "interne" Intelligenz, durch die die HVAC Hauptbauteile lokal in einem geschlossenen Ring kontrolliert werden können, um so ein zufriedenstellendes Komfortniveau zu erreichen. Das System ist insofern redundant, als dass eine Unterbrechung des CAN-Netzes oder ein MC-Ausfall keinen kompletten Systemausfall verursacht (es wird auf der Stufe "abgestuft" gearbeitet) (Fig. 3c).
According to the invention, this object is solved by the features of claim 1. Advantageous developments of the invention are contained in the accompanying claims.
The invention accordingly includes a data communication system for climate control and regulation systems in rail vehicles, wherein in the car or train intelligent input and output modules (IO) are arranged by a modular and decentralized circuit with a car and / or train bus system (CAN, TMS) connected, creating a redundancy of the system.
The advantages of the invention will be described in more detail with reference to the drawings and the following embodiments.
The circuits shown in FIGS. 3a and 3b are modular and decentralized and relate to the system control on the car.
Each module (IO) and each sensor is connected via a local CAN network (control area network) to a central controller (master controller MC) (FIG. 3a) or directly to the train network (TMS) if both networks are compatible with each other (FIG. 3b).
The advantage of this solution is in three points:
  1. 1. The wiring is lower because each module is physically "as close as possible" to the control component. The modules are interconnected only with a 2-wire local CAN "loop".
  2. 2. The reduction in cable length has a significant impact on improved CEM on the control components and the local area network, which is virtually immune to interference (PEM), as it is a network of complete information (frames), including control of the broadcast, the Reception and integrity of the data (does not apply to a 2-wire on-off connection, for example).
  3. 3. In case of interruption of the local CAN network or a failing MC, each I / O module has its own "internal" intelligence, which allows the HVAC main components to be controlled locally in a closed loop to achieve a satisfactory level of comfort. The system is redundant in that interrupting the CAN network or failing MC does not cause a complete system failure (it is done at the "staged" level) (Figure 3c).

Die erfindungsgemäße Schaltung nach der Figur 4a erweitert das vorherige Konzept nicht nur am einzelnen Wagen sondern auch am gesamten Zug, wobei das Ziel in der Gewährleistung einer Redundanz des Informationsaustausches über TMS und in der Verringerung der Anzahl von LID und eventuell von MC Schnittstellen besteht.The circuit according to the invention according to FIG. 4a expands the previous concept not only on the individual wagon but also on the entire train, the aim being to ensure a redundancy of the exchange of information via TMS and to reduce the number of LIDs and possibly MC interfaces.

Die Fig. 4a zeigt ein System zur Reduzierung der LID auf zwei Einheiten am gesamten Zug. Jeder Wagen verfügt dabei über einen lokalen Klimaregler (CR). Bei Ausfall eines CRs, kann die Kontrolle von einem anderen CR gemäß Fig. 4b übernommen werden.
Bei Ausfall aller CRs kann der zentrale Zugrechner die Steuerung übernehmen (siehe Fig. 4c), oder es tritt die im o.g. Abschnitt beschriebene Situation gemäß Fig. 3c ein. Bei Ausfall des CAN Netzwerkes tritt die im o.g. Abschnitt gemäß Fig. 3c beschriebene Situation ein: -> zweifache Redundanz.Figure 4a shows a system for reducing the LID to two units on the entire train. Each car has a local climate controller (CR). If one CR fails, the control can be taken over by another CR according to FIG. 4b.
If all CRs fail, the central train computer can take control (see FIG. 4c), or the situation described in the above-mentioned section occurs according to FIG. 3c. In the event of failure of the CAN network, the situation described in the above-mentioned section according to FIG. 3c occurs: -> two-fold redundancy.

Im Falle eines TMS-Ausfalls "übernimmt" das CAN-Netz den Informationsaustausch. Im Falle eines MC-Ausfalls "übernimmt" ein weiterer Regler den Informationsaustausch.
Doppelte Redundanz des Zuginformationssystems: Die Informationen sind über TMS und das CAN-Netz verfügbar: Die Kontroll- und Informationsfunktionen sind abgesichert.
Die Figur 4d zeigt ebenso ein System zur Verringerung der LID-Anzahl, jedoch ohne lokale Klimaregler. Das Kontroll-/Steuerungssystem eines jeden Wagens ist durch die beiden MC für den gesamten Zug doppelt abgesichert. Sobald ein MC ausfällt, sichert der zweite die Funktionen ab. Das bedeutet Redundanz. Bei Ausfall des TMS "übernimmt" das CAN-Netz den Informationsaustausch. - Redundanz des HVAC Informationssystems, (siehe Figur 4e).
Bei Ausfall eines MCs übernimmt der andere Regler den Informationsaustausch über das TMS und CAN-Netz (siehe Figur 4f).
Doppelte Redundanz des Zuginformationssystems: Die Informationen sind über TMS und das CAN-Netz verfügbar: Die Kontroll- und Informationsfunktionen sind gewährleistet: .In the case of a TMS failure, the CAN network "takes over" the exchange of information. In the case of a MC failure, another controller "takes over" the information exchange.
Double redundancy of the train information system: The information is available via TMS and the CAN network: The control and information functions are protected.
Figure 4d also shows a system for reducing the number of LIDs, but without local climate controls. The control / control system of each car is double-protected by the two MCs for the entire train. As soon as one MC fails, the second secures the functions. That means redundancy. If the TMS fails, the CAN network "takes over" the exchange of information. - Redundancy of the HVAC information system, (see Figure 4e).
If one MC fails, the other controller takes over the exchange of information via the TMS and CAN network (see FIG. 4f).
Double redundancy of the train information system: The information is available via TMS and the CAN network: The control and information functions are guaranteed:.

Liste der verwendeten Bezugszeichen:

CC:
Kontrolle/Steuerung
LID:
Informations- und Diagnoseschnittstelle
TMS:
Zugüberwachungssystem - Zuginformations- und Kontrollsystem (im allgemeinen "Zugnetz" genannt)
HVAC:
Heizungs- und Klimaanlage
CR:
Klimaregler
DI:
digitaler Ausgang: 2-Leiter-Ausgang Ein-Aus
DO:
digitaler Eingang: 2-Leiter-Eingang Ein-Aus
Al:
analoger Eingang: Eingang analoges Signal
EV:
Magnetventil
PEM:
elektromagnetische Störungen
CEM:
elektromagnetische Kompatibilität
IO:
digitales Eingangs-/Ausgangsmodul
MC:
Zentraler Regler
TS
Temperatursensor
List of reference numbers used:
CC:
Control / Control
LID:
Information and diagnostic interface
TMS:
Train monitoring system - train information and control system (commonly called "train network")
HVAC:
Heating and air conditioning
CR:
air regulator
DI:
digital output: 2-wire output on-off
DO:
digital input: 2-wire input on-off
al:
analog input: input analog signal
EV:
magnetic valve
PEM:
electromagnetic interference
CEM:
electromagnetic compatibility
IO:
digital input / output module
MC:
Central controller
TS
temperature sensor

Claims (5)

Datenkommunikationssystem für Klimasteuerungs- und Regelungssysteme in Schienenfahrzeugen, dadurch gekennzeichnet, dass im Wagen oder Zug intelligente Ein- und Ausgabemodule (IO) angeordnet sind, die durch eine modulare und dezentrale Schaltung mit einem Wagen- oder Zugbussystem (CAN, TMS) verbunden sind, wodurch eine einfache oder mehrfache Redundanz des Systems bildbar ist.Data communication system for Klimasteuerungs- and control systems in rail vehicles, characterized in that in the car or train intelligent input and output modules (IO) are arranged, which are connected by a modular and decentralized circuit with a car or train bus system (CAN, TMS), whereby a single or multiple redundancy of the system is bildbar. Datenkommunikationssystem nach Anspruch 1, dadurch gekennzeichnet, dass der Wagen oder Zug mit nur einem Klimaregler (HVAC-CR) ausgerüstet ist.Data communication system according to claim 1, characterized in that the car or train is equipped with only one air conditioning controller (HVAC-CR). Datenkommunikationssystem nach Anspruch 2, dadurch gekennzeichnet, dass die intelligenten Ein- und Ausgabemodule (IO) und im Wagen angeordnete Sensoren (TS) über ein lokales Netz (CAN) mit dem zentralen Klimaregler (HVAC-CR) verbunden sind.Data communication system according to claim 2, characterized in that the intelligent input and output modules (IO) and arranged in the car sensors (TS) via a local area network (CAN) to the central air conditioning controller (HVAC-CR) are connected. Datenkommunikationssystem nach Anspruch 1, dadurch gekennzeichnet, dass der Zug weniger Klimarechner als Wagen oder Klimaanlagen aufweist, die mit dem Zugnetz (TMS) und dem lokalen Netz (CAN) in Verbindung stehen.Data communication system according to claim 1, characterized in that the train has fewer air conditioning computers than cars or air conditioners connected to the train network (TMS) and the local area network (CAN). Datenkommunikationssystem nach einem der o.g. Ansprüche, dadurch gekennzeichnet, dass jedes intelligente Ein- und Ausgabemodule (IO) über eine eigene interne Intelligenz verfügt, durch die die Bauteile der Heizungs- und Klimaanlage lokal kontrollierbar sind.Data communication system according to one of the above claims, characterized in that each intelligent input and output modules (IO) has its own internal intelligence, through which the components of the heating and air conditioning are locally controllable.
EP06090035A 2005-04-28 2006-03-08 Data communication system for railway vehicles Withdrawn EP1719688A1 (en)

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DE200510020698 DE102005020698A1 (en) 2005-04-28 2005-04-28 Data communication system for climate regulation and regulation systems in railway vehicles has input and output modules which are arranged in vehicle or traction intelligent

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