WO2000027071A2 - Leitungskopplung und verwendung einer leitungskopplung in einem bussystem - Google Patents
Leitungskopplung und verwendung einer leitungskopplung in einem bussystem Download PDFInfo
- Publication number
- WO2000027071A2 WO2000027071A2 PCT/DE1999/003540 DE9903540W WO0027071A2 WO 2000027071 A2 WO2000027071 A2 WO 2000027071A2 DE 9903540 W DE9903540 W DE 9903540W WO 0027071 A2 WO0027071 A2 WO 0027071A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- line
- output
- line coupling
- input
- switch
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
Definitions
- the invention relates to a line coupling and the use of a line coupling in a bus system.
- a bus system is known in which individual stations are connected to one another via a data bus.
- the stations exchange data with one another via the data line.
- the data can be transmitted synchronously or asynchronously, usually using a multiplex method.
- Access to the data bus can be arbitrary or can follow certain rules.
- the individual stations can have equal rights in their right to send or receive data.
- one of the stations can be designed as a master station, which controls the remaining slave stations and in particular their access to the data bus.
- the data bus is usually a two-wire line to which the individual stations are connected via spur or other connecting lines. Data and / or supply energy for one or more stations can be transmitted via the data bus.
- the bus system is exposed to a harsh environment and e.g. operated in a motor vehicle, the risk of a short circuit on the data bus is high. However, if the data bus is short-circuited at one point, further data exchange on the entire data bus is no longer possible.
- a disadvantage of a line coupling with PCT resistors is that the individual bus sections are connected to one another via the PCT resistors in a low-resistance manner but nevertheless with a finite resistor and thus limit the number of stations that can be connected to the data line due to the voltage drop at the PCT resistors is.
- the object of the invention is to provide a line coupling in which an output line couples to an input line in such a way that the output line is only connected to the input line with a low resistance if the output line has no short circuit.
- a high-impedance isolating resistor preferably with a resistance value in the kilo-ohm range, is arranged between the input line and the output line.
- a controllable switch which can be switched on and off and is preferably designed as a transistor switch, is arranged parallel to the isolating resistor. If the controllable switch is switched off as in the first electrical and mechanical connection of the input and output lines, the input line is only connected to the output line via the high-resistance isolating resistor. In the event of a short circuit on the output line, the isolating resistor prevents the short circuit from reacting to the input line and still allows operation between stations connected to the input line. If the output line is not short-circuited, however, data transmission between the input line and the output line is not possible.
- the input line and the output line serve as the transmission medium for data and / or energy.
- a voltage tap is now provided on the output line, which allows measurement of the output voltage between the output line and a fixed reference potential for a single-wire line, or the voltage between the wires of a two-wire output line.
- a control circuit controls the switch depending on the determined output voltage. The switch is preferably only turned on when the output voltage determined above exceeds a limit value.
- the input voltage can still be applied to the output line. If this slave station is supplied with energy via the station connected to the input line, a supply voltage is supplied to the output line and thus the slave station via the input line and the isolating resistor, which supply voltage is also sufficiently high on the output line. hen level for detection by the control circuit.
- the supply voltage can be designed as a DC voltage signal on which an AC signal is superimposed, which contains information.
- the supply voltage can also be provided by an alternating signal, which optionally contains information. If necessary, such an alternating signal for the tapping of the output voltage is rectified and smoothed using a capacitor. In any case, an output voltage greater than zero can be determined on the output line side if the output line is not short-circuited. Then, in any case, the controllable switch that short-circuits the isolating resistor is automatically actuated.
- the control circuit recognizes that the output voltage on the output line assumes values of around 0 volts, even though a higher voltage value should be expected during normal operation, the measured output voltage does not exceed the limit value assigned to it. As a result, the electrically controllable switch remains closed.
- the output line itself or the bus section connected to the output line obviously has a short circuit and remains decoupled from the input line and thus does not impair the data transmission on the input line-side bus system.
- the line coupling according to the invention works completely autonomously, since the connection of the bus section connected to the output line depends only on the voltage on the output line.
- the line coupling can also be subsequently inserted and installed in any data lines and bus systems, without the data lines or connected stations having to be modified in any way.
- effective short-circuit protection for a bus system is achieved with only a few components in the line coupling. Only if there is no short circuit the output line switched on. As soon as a short circuit has occurred, the output line is automatically switched off again.
- the line coupling according to the invention is preferably used in front of data line sections which are exposed to a short-circuit-endangering environment. In one
- a motor vehicle should, for example, arrange such a line coupling on the fuselage side before the data line passes into a vehicle door or into an A / B / or C pillar of the vehicle, since the data line section to the vehicle door is subjected to high mechanical stresses due to the actuation of the vehicle door and the load-bearing ones Pillars of the vehicle can be heavily used as a result of an accident. Furthermore, by using the line coupling in a bus system, controlled switching on and off of bus sections as well as simplified addressing of connected stations can be achieved, as will be described later.
- the control circuit contains an evaluator for a control word supplied via the input line.
- the control circuit is then designed in such a way that the switch is only actuated when a minimum output voltage is measured and at the same time a control word for switching on the switch can be picked up and recognized from the input line.
- a line coupling is preferably used in a bus system in which stations connected to one another are connected to one another via a line coupling. Starting from a master station with which the remaining slave stations are connected in a chain or ring, each slave station is put into operation in such a way that the line coupling immediately in front of the slave station is switched through (in the direction of the master station) and then an address is assigned to the slave station. The process begins with the first slave station connected to the master station via a line coupling. So can each short-circuit-free bus section is successively put into operation and, as a result of the sequential procedure, each slave station is uniquely assigned an address by the master station.
- the output line After successfully connecting an output line to an input line of the line coupling, the output line remains connected to the input line with a low resistance via the switch, even if the control word is no longer present, unless the output voltage falls below the prescribed limit value.
- control word is provided to open the switch, the bus system can also be switched off in a controlled manner. Such a control word must be recognized and implemented by the line coupling. If several line couplings are used, a separate control word is then provided for each line coupling to open the switch.
- the station named as master station acts at least in a controlling manner on the slave stations with regard to the initialization of the bus system and possibly the slave stations.
- the line coupling is symmetrical and also has a tap on the input side for the input voltage between the input line.
- a control word evaluator is provided on the output side, which evaluates control words supplied via the output line and undertakes corresponding control measures.
- the controllable switch is preferably switched on when both a minimum output voltage, a minimum input voltage and, at the same time, a control word for closing the switch either on the output side or on the input side are recognized.
- the input control voltage has the advantage that the
- Line coupling can be used in a closed ring system and thus sections of the data bus can also be separated.
- the addition of the control word evaluator on the output side has the advantage that there is now a symmetrical line coupling which can be arranged between an input line and an output line, regardless of the direction. If this data line coupling is also used in a ring bus system, the line coupling can be activated both from the input side and from the output side.
- the slave stations can be activated in one direction from the master station in the ring.
- the master station can activate the remaining slave stations in the other direction in the ring and thus operate a maximum number of slave stations on the ring bus, the line couplings which are connected to one another via the short-circuited bus section remain deactivated and thus exclude the intermediate slave station from the data transmission mode.
- the evaluators for control words are missing both on the input side and on the output side compared to the last-described development.
- this line coupling if the switch is only released when both the input voltage and the output voltage exceed limit values.
- FIG. 1 shows the electrical circuit diagram of a line coupling according to the invention
- FIG. 2 shows a first bus system using a line coupling
- FIG. 3 shows a further bus system using a line coupling.
- FIG. 1 shows the electrical circuit diagram of a line coupling according to the invention.
- a two-wire input line E is connected to a two-wire output line A via an isolating resistor 21 in each line branch.
- An electrically controllable switch 22 is arranged parallel to each isolating resistor 21.
- Each electrically controllable switch contains two field effect transistors Ml and M2 or M3 and M4 in series as well as a resistor R3 or R.
- a control circuit 23 serves to actuate the switches 22.
- the control circuit 22 contains a comparator 231 for the input voltage, a comparator 232 for the output voltage, an input-side evaluator 233, an output-side evaluator 234, an AND gate 235, an OR gate 236, a bridge 237, a driver unit 238 and a charge pump 239.
- the first comparator 231 compares the input voltage U E present between the lines of the input line E , which is applied to the comparator 231 via polarity reversal protection diodes D1 to D4. is carried out, with a limit value and, if the limit value is exceeded, gives a logic one to the AND gate 235.
- the second comparator 232 compares the output voltage U A present between the lines of the output line A, which is fed to the comparator 232 via polarity reversal protection diodes D7 to D10, with a further limit value and, when the further limit value is exceeded, gives a logic one to the AND gate 235.
- the input-side evaluator 233 receives data signals from the input line E and thus evaluates control words transmitted via the input line E. Detects e.g. the evaluator 233 outputs a control word for closing the switch 22, it outputs a logic one to the OR gate 236.
- the output-side evaluator 234 receives data signals from the output line A and thus evaluates further control words transmitted via the output line A. Detects e.g. if the evaluator 234 has a further control word for closing the switch 22, it outputs a logic one to the OR gate 236.
- the output of the OR gate 236 is connected to an input of the AND gate 235.
- the driver unit 238 is only actuated when both a minimum output voltage, a minimum output voltage and a control word for closing the controllable switches 22 are detected either on the input side or on the output side.
- Such a line coupling is therefore particularly suitable for the controlled inclusion of bus systems, preferably ring bus systems.
- Figure 2 shows a bus system with a master station 1, n slave stations 3 ⁇ to 3 n and n line couplings 2 ⁇ to 2 n .
- Each station 1, 3i is connected to a further station 1, 3i via a line coupling 2i.
- the output line A of a line coupling 2 is the input line E of the next line coupling.
- Each slave station 3 is connected via a connecting line V to an input or output line E or A.
- the line couplings 2 are designed according to the invention or one of the developments of the invention, preferably with a control word evaluator on the input side.
- the master station 1 supplies a DC voltage signal to the input line Ei to supply all slave stations 3.
- Data signals from the master station 1 are alternately superimposed on the DC voltage signal as AC signals.
- Data signals from the slave stations 3 are designed as current or load signals.
- FIG. 3 shows a bus system with a master station 1, n slave stations 3 n and n + 1 line couplings 2 U. Each station 1.3 U is connected to a further station 1, 3 1 via a line coupling 2.
- the line coupling corresponds to FIG. 2, except that it is no longer possible to speak clearly of input and output lines of the line couplings, since a bus ring structure relativizes this direction-dependent consideration.
- the line couplings 2 are designed according to the invention or one of the developments of the invention, preferably with an input-side and output-side control word evaluator.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Bus Control (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000580337A JP2002529837A (ja) | 1998-11-04 | 1999-11-04 | 線路結合装置およびバスシステムにおける線路結合装置の使用法 |
EP99966802A EP1125403A2 (de) | 1998-11-04 | 1999-11-04 | Leitungskopplung und verwendung einer leitungskopplung in einem bussystem |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19850869.7 | 1998-11-04 | ||
DE19850869A DE19850869B4 (de) | 1998-11-04 | 1998-11-04 | Leitungskopplung und Verwendung einer Leitungskopplung in einem Bussystem |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000027071A2 true WO2000027071A2 (de) | 2000-05-11 |
WO2000027071A3 WO2000027071A3 (de) | 2000-08-03 |
Family
ID=7886692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003540 WO2000027071A2 (de) | 1998-11-04 | 1999-11-04 | Leitungskopplung und verwendung einer leitungskopplung in einem bussystem |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1125403A2 (de) |
JP (1) | JP2002529837A (de) |
KR (1) | KR100413657B1 (de) |
DE (1) | DE19850869B4 (de) |
WO (1) | WO2000027071A2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19916894B4 (de) * | 1999-04-14 | 2005-09-08 | Siemens Ag | Bussystem |
DE102005037047B3 (de) * | 2005-08-05 | 2006-12-28 | Novar Gmbh | Gebäudeleittechnik- oder Gefahrenmeldeanlage |
US7746114B2 (en) | 2007-11-14 | 2010-06-29 | Denso Corporation | Bus switch and electronic switch |
EP2439885B1 (de) | 2010-10-08 | 2013-06-26 | Honeywell International Inc. | Verfahren zur digitalen Kommunikation zwischen mehreren, über einen seriellen Feldbus verbundenen Knoten und entsprechendes System, insbesondere ein Feldsteuerungssystem oder ein Feldüberwachungssystem |
DE102015208495A1 (de) * | 2015-05-07 | 2016-11-10 | Continental Automotive Gmbh | Steuerelektronik für ein land- oder forstwirtschaftliches Fahrzeug |
DE102017223723A1 (de) * | 2017-12-22 | 2019-06-27 | Continental Teves Ag & Co. Ohg | Schaltungsanordnung, Verfahren und Verwendung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0647926A1 (de) * | 1993-10-06 | 1995-04-12 | VDO Adolf Schindling AG | Einrichtung zum Nachweis von Störungen der Signalübertragung in Kraftfahrzeugen |
US5675189A (en) * | 1991-08-30 | 1997-10-07 | Yazaki Corporation | Vehicle multiplex transmission apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3234741A1 (de) * | 1982-09-20 | 1984-03-22 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und schaltungsanordnung zur steuerung der einstellung von geraeten bzw. betriebsarten in einer datensignaluebertragungsanlage |
DE59105669D1 (de) * | 1991-03-08 | 1995-07-13 | Siemens Ag | Busorientiertes Multiplexsystem. |
DE19509133C2 (de) * | 1994-04-11 | 2003-07-17 | Daimler Chrysler Ag | Anordnung zur Überwachung von Zweidraht-Busleitungen |
DE19625401C1 (de) * | 1996-06-25 | 1997-09-18 | Siemens Ag | Bussystem zur Datenübertragung |
-
1998
- 1998-11-04 DE DE19850869A patent/DE19850869B4/de not_active Expired - Fee Related
-
1999
- 1999-11-04 JP JP2000580337A patent/JP2002529837A/ja active Pending
- 1999-11-04 WO PCT/DE1999/003540 patent/WO2000027071A2/de not_active Application Discontinuation
- 1999-11-04 KR KR10-2001-7005642A patent/KR100413657B1/ko not_active IP Right Cessation
- 1999-11-04 EP EP99966802A patent/EP1125403A2/de not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5675189A (en) * | 1991-08-30 | 1997-10-07 | Yazaki Corporation | Vehicle multiplex transmission apparatus |
EP0647926A1 (de) * | 1993-10-06 | 1995-04-12 | VDO Adolf Schindling AG | Einrichtung zum Nachweis von Störungen der Signalübertragung in Kraftfahrzeugen |
Also Published As
Publication number | Publication date |
---|---|
EP1125403A2 (de) | 2001-08-22 |
KR100413657B1 (ko) | 2004-01-03 |
JP2002529837A (ja) | 2002-09-10 |
DE19850869B4 (de) | 2004-09-23 |
WO2000027071A3 (de) | 2000-08-03 |
DE19850869A1 (de) | 2000-05-11 |
KR20010083950A (ko) | 2001-09-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0516633B1 (de) | Verfahren und vorrichtung zur funktionsüberwachung eines elektrischen verbrauchers | |
DE19503460C1 (de) | Fehlertolerante Endstufe für ein digitales Zweileiterbus-Datenkommunikationssystem | |
DE19742716C5 (de) | Steuer- und Datenübertragungsanlage und Verfahren zum Übertragen von sicherheitsbezogenen Daten | |
DE3854778T2 (de) | Austauschsystem zwischen logischen Modulen | |
EP3493481B1 (de) | Verfahren zum einspeisen von adressierungsströmen durch busknoten eines seriellen datenbussystems und busknoten für ein derartiges datenbussystem | |
EP1638880A1 (de) | Sicherheitssystem einer aufzugsanlage | |
EP3461068A1 (de) | Verfahren zur vergabe von adressen in einem seriellen datenbussystem und busknoten für ein derartiges serielles datenbussystem | |
DE10235788A1 (de) | Elektrisches Verbindungssystem für ein Kraftfahrzeug | |
DE10212685A1 (de) | Schaltungsanordnung und Verfahren zum Überprüfen eines Stromkreises | |
DE69816975T2 (de) | Taktleitungs-überstromschutz und industrielles steuerungssystem damit | |
DE19850869B4 (de) | Leitungskopplung und Verwendung einer Leitungskopplung in einem Bussystem | |
EP1917651A2 (de) | Gebäudeleittechnik- oder gefahrenmeldeanlage | |
EP1603282B1 (de) | Verfahren zur Adressierung der Teilnehmer eines Bussystems | |
EP3792116B1 (de) | Bordnetzsystem | |
DE19518306B4 (de) | Vorrichtung zur Steuerung einer Anzahl von untereinander kommunizierenden Aktuatoren eines Systems | |
DE19705365A1 (de) | Vorrichtung zur zeitmultiplexen Übertragung von Informationen | |
EP1845548A2 (de) | Einrichtung, Schaltungsanordnung und Verfahren zur Isolations- und Erdschlussüberwachung in einem IT-System | |
DE4426466C2 (de) | Anordnung und Verfahren zum Betreiben von Gefahrenmeldern | |
EP3299909A1 (de) | Sicherheitsschaltung zum fehlersicheren abschalten einer gefahrbringenden technischen anlage | |
DE19813952C1 (de) | Signalisierungsendstufe zur Erzeugung digitaler Spannungssignale auf einem Bussystem | |
DE3211020C1 (de) | Übertragungs-Einrichtung zur Datenübermittlung zwischen einer Steuerzentrale und mehreren Regel- oder Steuergeräten eines Gebäudes | |
DE4438836A1 (de) | Schaltungsanordnung | |
DE102006044511B4 (de) | Verfahren zum Ermitteln des Orts einer Busunterbrechung in einem CAN-Daisy-Chain-Busnetzwerk | |
DE19918893B4 (de) | Kommunikationssystem, insbesondere Hausanlage | |
DE10135798A1 (de) | Verfahren zur Diagnose diskreter Endstufen über Digitaleingänge |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
AK | Designated states |
Kind code of ref document: A3 Designated state(s): JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1999966802 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 2000 580337 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020017005642 Country of ref document: KR Ref document number: 09831041 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1999966802 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020017005642 Country of ref document: KR |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020017005642 Country of ref document: KR |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1999966802 Country of ref document: EP |