US20060132170A1 - device for a two-wire line terminal - Google Patents

device for a two-wire line terminal Download PDF

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Publication number
US20060132170A1
US20060132170A1 US10/538,526 US53852605A US2006132170A1 US 20060132170 A1 US20060132170 A1 US 20060132170A1 US 53852605 A US53852605 A US 53852605A US 2006132170 A1 US2006132170 A1 US 2006132170A1
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United States
Prior art keywords
terminating
terminating resistor
recited
wire line
switching arrangement
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/538,526
Inventor
Wilhelm Fahrbach
Udo Weyhersmueller
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Robert Bosch GmbH
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FAHRBACH, WILEHLM, WEYHERSMUELLER, UDO
Publication of US20060132170A1 publication Critical patent/US20060132170A1/en
Priority to US11/981,299 priority Critical patent/US7541830B2/en
Abandoned legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40Bus networks
    • H04L12/40006Architecture of a communication node
    • H04L12/40032Details regarding a bus interface enhancer
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38Information transfer, e.g. on bus
    • G06F13/40Bus structure
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38Information transfer, e.g. on bus
    • G06F13/40Bus structure
    • G06F13/4063Device-to-bus coupling
    • G06F13/4068Electrical coupling
    • G06F13/4086Bus impedance matching, e.g. termination
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/50Systems for transmission between fixed stations via two-conductor transmission lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264Arrangements for coupling to transmission lines
    • H04L25/0298Arrangement for terminating transmission lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40Bus networks
    • H04L2012/40208Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215Controller Area Network CAN
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40Bus networks
    • H04L2012/40267Bus for use in transportation systems
    • H04L2012/40273Bus for use in transportation systems the transportation system being a vehicle

Definitions

  • the present invention relates to a device for a line termination of two-wire lines having a first and second terminating resistor between the two wires, the first and the second terminating resistor being connected in series.
  • a device for a line termination of two-wire lines is described in the German patent DE 195 25 350. It is described there that at least one first and one second terminating resistor are provided between the two wires of the two-wire line and that the two resistors be connected in series. Originating with the connecting line between the two resistors is a line that is connected to a fixed voltage potential, especially ground. Until now, the terminating resistor has always been permanently predefined, especially in a CAN bus system, i.e., either implemented or not implemented in the control unit. As a consequence, there is no flexibility in use.
  • the present invention provides a device for a line termination of two-wire lines having at least one first and one second terminating resistor between the two wires, the first and the second terminating resistor being connected in series, and at least one switching arrangement being provided between the two terminating resistors.
  • the device according to the present invention may be used in connection with a CAN bus system and assumes the receive and/or transmit function therein, so that the two-wire line is part of a CAN bus system, i.e., the lines CAN high and CAN low.
  • a switching logic which triggers the at least one switching means as a function of an input signal.
  • this input signal is generated by an arithmetic function block, e.g., the microcontroller itself.
  • a configurable terminating resistor in particular a CAN terminating resistor, makes it possible to adapt the termination resistor to the individual application, either by controlling the switching logic via software (via digital output from ⁇ c) or via hardware, i.e., by way of a hardware bridge in the cable harness plug.
  • the result is reduced expenditure for logistics and stock-keeping and, in particular, also lower costs for customers and suppliers.
  • a balancing member is connected between the terminating resistors, which, in an example embodiment, is able to be connected thereto by one switching means for each terminating resistor.
  • a control unit e.g., for the control of operating sequences in a vehicle, is able to be adapted to various applications by software configuration, in particular.
  • FIG. 1 shows a block diagram of a device according to the present invention.
  • FIG. 1 shows a CAN high and a CAN low line, CAN-H and CAN-L, respectively, which are connected to a component 100 via coupling elements 111 and 112 , respectively, which component 100 functions as a CAN transceiver, that is, component 100 assumes the receive and/or transmit functionality, i.e., the transceiver function of a CAN component in this respect.
  • the CAN-High and CAN-Low lines are guided to a driver module, in particular a CAN driver module 103 .
  • terminating resistors 107 and 108 are shown, which are connected in series and, with the aid of switching means 105 and 106 , are able to be connected to one another and also to a balancing unit, i.e., a balancing element 109 .
  • Switching means 105 and 106 are addressed by a control logic 104 , which action is symbolically denoted by the dashed arrows.
  • the control logic 104 itself receives an input signal via line 114 and an additional coupling element 110 , for instance from an output 113 of the arithmetic function block or microcontroller 101 .
  • the microcontroller 101 is connected to the driver module 103 for the communication via a communication connection 102 in a unidirectional and/or bidirectional manner.
  • the input signal may be generated or picked off digitally, i.e., via microcontroller output 113 , or via a bridge in the cable-harness plug.
  • the separation from the bus may be realized by two electrical switches, i.e., switching means 105 and 106 . This allows the configuration of the terminating resistor to be modified at any time via the microcontroller output; in the case of a bridge in the cable-harness plug, this is possible only after its reconfiguration.
  • the terminating resistor is able to be adapted to the particular application either by software-based or hardware-based triggering of the switching logic.
  • a software-based adaptation the digital output of microcontroller 101 will be used for this purpose.
  • a hardware-based adaptation this is implemented by a bridge in the cable-harness tree.
  • control units for the control of operating sequences e.g., in a motor vehicle, this minimizes the multitude of control devices for customers and suppliers.
  • An adaptation of the CAN terminating resistor of the control unit to various applications may therefore be implemented solely by modifying the software configuration, so that a simple and flexible possibility for a rapid application adaptation is provided.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

A device for a line termination of two-wire lines having at least one first and second terminating resistant between the two wires is provided, the first and the second terminating resistors being connected in series, and at least one switching arrangement being provided between the two terminating resistors.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a device for a line termination of two-wire lines having a first and second terminating resistor between the two wires, the first and the second terminating resistor being connected in series.
  • BACKGROUND INFORMATION
  • A device for a line termination of two-wire lines is described in the German patent DE 195 25 350. It is described there that at least one first and one second terminating resistor are provided between the two wires of the two-wire line and that the two resistors be connected in series. Originating with the connecting line between the two resistors is a line that is connected to a fixed voltage potential, especially ground. Until now, the terminating resistor has always been permanently predefined, especially in a CAN bus system, i.e., either implemented or not implemented in the control unit. As a consequence, there is no flexibility in use.
  • Therefore, it is an object of the present invention to provide a device that allows greater flexibility when used in a line termination of two-wire lines.
  • SUMMARY
  • The present invention provides a device for a line termination of two-wire lines having at least one first and one second terminating resistor between the two wires, the first and the second terminating resistor being connected in series, and at least one switching arrangement being provided between the two terminating resistors.
  • This increases the flexibility during use since a rapid switch or rapid adaptation is possible in the application when using the terminating resistor configured in this manner.
  • In an advantageous manner, the device according to the present invention may be used in connection with a CAN bus system and assumes the receive and/or transmit function therein, so that the two-wire line is part of a CAN bus system, i.e., the lines CAN high and CAN low.
  • In addition, a switching logic is provided, which triggers the at least one switching means as a function of an input signal.
  • Furthermore, in an example embodiment, it is provided that this input signal is generated by an arithmetic function block, e.g., the microcontroller itself.
  • The use of a configurable terminating resistor, in particular a CAN terminating resistor, makes it possible to adapt the termination resistor to the individual application, either by controlling the switching logic via software (via digital output from μc) or via hardware, i.e., by way of a hardware bridge in the cable harness plug. This minimizes the multitude of control units, especially on the side of the customer and supplier, for instance to a single control unit for stand-alone, master and slave, for example, instead of one for each application. The result is reduced expenditure for logistics and stock-keeping and, in particular, also lower costs for customers and suppliers.
  • In an advantageous manner, a balancing member is connected between the terminating resistors, which, in an example embodiment, is able to be connected thereto by one switching means for each terminating resistor.
  • In this way, a control unit, e.g., for the control of operating sequences in a vehicle, is able to be adapted to various applications by software configuration, in particular.
  • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 shows a block diagram of a device according to the present invention.
  • DETAILED DESCRIPTION
  • The single figure—FIG. 1—shows a CAN high and a CAN low line, CAN-H and CAN-L, respectively, which are connected to a component 100 via coupling elements 111 and 112, respectively, which component 100 functions as a CAN transceiver, that is, component 100 assumes the receive and/or transmit functionality, i.e., the transceiver function of a CAN component in this respect. The CAN-High and CAN-Low lines are guided to a driver module, in particular a CAN driver module 103. Furthermore, two terminating resistors 107 and 108 are shown, which are connected in series and, with the aid of switching means 105 and 106, are able to be connected to one another and also to a balancing unit, i.e., a balancing element 109. Switching means 105 and 106 are addressed by a control logic 104, which action is symbolically denoted by the dashed arrows. The control logic 104 itself receives an input signal via line 114 and an additional coupling element 110, for instance from an output 113 of the arithmetic function block or microcontroller 101. Furthermore, the microcontroller 101 is connected to the driver module 103 for the communication via a communication connection 102 in a unidirectional and/or bidirectional manner.
  • On the basis of the input signal at control logic 104, it is possible to select whether the terminating resistor is active or separated from the bus. On the one hand, the input signal may be generated or picked off digitally, i.e., via microcontroller output 113, or via a bridge in the cable-harness plug. The separation from the bus may be realized by two electrical switches, i.e., switching means 105 and 106. This allows the configuration of the terminating resistor to be modified at any time via the microcontroller output; in the case of a bridge in the cable-harness plug, this is possible only after its reconfiguration.
  • Due to the installation of the configurable CAN terminating resistor, the terminating resistor is able to be adapted to the particular application either by software-based or hardware-based triggering of the switching logic. In a software-based adaptation, the digital output of microcontroller 101 will be used for this purpose. In a hardware-based adaptation, this is implemented by a bridge in the cable-harness tree. In the case of control units for the control of operating sequences, e.g., in a motor vehicle, this minimizes the multitude of control devices for customers and suppliers. An adaptation of the CAN terminating resistor of the control unit to various applications may therefore be implemented solely by modifying the software configuration, so that a simple and flexible possibility for a rapid application adaptation is provided.

Claims (7)

1-6. (canceled)
7. A device for providing a line termination of a two-wire line, comprising:
a first terminating resistor and a second terminating resistor provided between the two wires of the two-wire line, wherein the first and the second terminating resistors are connected in series; and
at least one switching arrangement provided between the first and second terminating resistors, wherein the at least one switching arrangement is configured to selectively connect to at least one of the first and second terminating resistors.
8. The device as recited in claim 7, further comprising:
a switching logic for triggering the at least one switching arrangement as a function of an input signal.
9. The device as recited in claim 7, further comprising:
a balancing element connected between the first and second terminating resistors.
10. The device as recited in claim 9, wherein each of the first and second terminating resistor is selectively connected to the balancing element by the at least one switching arrangement.
11. The device as recited in claim 8, wherein the input signal is generated by an arithmetic function block.
12. The device as recited in claim 7, wherein the two-wire line is a part of a CAN bus system, and wherein the device assumes at least one of a receive function and a transmit function in the CAN bus system.
US10/538,526 2002-12-30 2003-12-16 device for a two-wire line terminal Abandoned US20060132170A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/981,299 US7541830B2 (en) 2002-12-30 2007-10-30 Device for a line termination of two-wire lines

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10261386A DE10261386A1 (en) 2002-12-30 2002-12-30 Device for terminating two-wire lines
DE10261386.9 2002-12-30
PCT/DE2003/004133 WO2004062219A1 (en) 2002-12-30 2003-12-16 Device for a two-wire line terminal

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/981,299 Continuation US7541830B2 (en) 2002-12-30 2007-10-30 Device for a line termination of two-wire lines

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US20060132170A1 true US20060132170A1 (en) 2006-06-22

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US10/538,526 Abandoned US20060132170A1 (en) 2002-12-30 2003-12-16 device for a two-wire line terminal
US11/981,299 Expired - Lifetime US7541830B2 (en) 2002-12-30 2007-10-30 Device for a line termination of two-wire lines

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EP (1) EP1582040B1 (en)
JP (1) JP4268139B2 (en)
KR (1) KR101076154B1 (en)
CN (1) CN100559782C (en)
AU (1) AU2003294657A1 (en)
DE (1) DE10261386A1 (en)
WO (1) WO2004062219A1 (en)

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US9577601B2 (en) 2011-07-01 2017-02-21 Siemens Aktiengesellschaft Broadcast serial bus termination
WO2013164533A1 (en) * 2012-05-02 2013-11-07 Peugeot Citroen Automobiles Sa Electronic control unit having a configurable line termination
FR2990311A1 (en) * 2012-05-02 2013-11-08 Peugeot Citroen Automobiles Sa ELECTRONIC CONTROL UNIT WITH CONFIGURABLE LINE TERMINATION
US20140023365A1 (en) * 2012-07-17 2014-01-23 Teledyne Instruments, Inc. Systems and methods for subsea optical can buses
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US10055374B2 (en) * 2015-03-16 2018-08-21 Robert Bosch Gmbh Participating station for a bus system and method for data transmission in a bus system
US10333744B2 (en) * 2015-12-14 2019-06-25 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Circuit assembly for a switchable line termination of a serial bus
RU2701382C1 (en) * 2015-12-14 2019-09-26 Кнорр-Бремзе Зюстеме Фюр Нутцфарцойге Гмбх Circuit unit for disconnected serial bus line termination load
US20190027937A1 (en) * 2017-07-24 2019-01-24 Clark Equipment Company Can bus terminating resistor arrangement
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KR101076154B1 (en) 2011-10-21
CN1732655A (en) 2006-02-08
AU2003294657A1 (en) 2004-07-29
JP4268139B2 (en) 2009-05-27
US7541830B2 (en) 2009-06-02
JP2006512842A (en) 2006-04-13
US20080136444A1 (en) 2008-06-12
EP1582040A1 (en) 2005-10-05
DE10261386A1 (en) 2004-07-08
EP1582040B1 (en) 2013-02-20
WO2004062219A1 (en) 2004-07-22
KR20050098846A (en) 2005-10-12
CN100559782C (en) 2009-11-11

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