WO1980000389A1 - Input/output data cable - Google Patents
Input/output data cable Download PDFInfo
- Publication number
- WO1980000389A1 WO1980000389A1 PCT/GB1979/000133 GB7900133W WO8000389A1 WO 1980000389 A1 WO1980000389 A1 WO 1980000389A1 GB 7900133 W GB7900133 W GB 7900133W WO 8000389 A1 WO8000389 A1 WO 8000389A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layers
- layer
- cable
- input
- data cable
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/08—Flat or ribbon cables
- H01B7/0838—Parallel wires, sandwiched between two insulating layers
Definitions
- This invention relates to an input/output (I/O) data cable for use in interconnecting the modular components of a programmable controller.
- I/O input/output
- a programmable controller comprises a processor which controls the operation of the system being controlled by receiving logic signals from a plurality of input modules and feeding logic signals to a plurality of output modules, the input and output modules being connected to the processor through respective data cables. Also the logic level voltage must be fed to the input modules, output modules and processor.
- the logic signals which pass between the processor and the input and output modules are subjected to considerable interference especially in the case when the system being controlled is a machine. Accordingly, it is necessary to ensure that the interconnecting data cables have high immunity from such interference.
- an input/output data cable for a programmable controller comprising a flexible laminate made up of three layers, each layer having a conducting part and an insulating part, the first of said layers being adapted to be connected to the system ground, the second of said layers being adapted to carry a logic voltage, and the third of said layers having a plurality of signal tracks for carrying data signals, wherein said first and second layers are adjacent.
- an input/output data cable for a programmable controller comprising a flexible laminate made up of two layers, each layer having a conducting part and an insulating part, the conducting part of the first of said layers having a single conductin track extending substantially across the whole width of the layer, and the conducting part of the second of said layer being formed by a conducting track extending over part of the width of said layer and by a plurality ofsignal tracks for carrying data signals.
- Fig. 1 is a top plan view of one embodiment of a data cable made in accordance with said one aspect of the present invention
- Fig. 2 is a sectional view taken along the line II - II of Fig. 1;
- Figs. 3a, 3b and 3c are plan views of the three layers of the data cable of Fig. 1;
- Figs. 4a and 4b are perspective and elevational views respectively of a connector for use with the data cable of Fig. 1;
- Figs. 5a and 5b are plan views of the two layers of one embodiment of a data cable made in accordance with said second aspect of the present invention.
- an input/ output data cable 1 for interconnecting the modular components of a programmable controller comprises a flexible laminate assembly made up of three layers 10,
- the layer 11 and 12 each having a conducting part and an insulating part.
- the layer 11 is used for the logic voltage; the layer 12 is used for the system ground and layer 10 is used for data signals. As illustrated in Figs. 3a and 3b the layers 11 and
- each of the copper tracks 110 and 120 each comprise a single copper track 110 and 120 attached to an insulating polyester strip 111 and 121 respectively. At the ends of each of the copper tracks 110 and 120 there are provided contact tabs 114 and 124 respectively for connection with a connector as hereinafter described.
- the layer 10 comprises a plurality of side-by-side signal carrying conductors 100 extending along the layer
- the data cable is formed by glueing the layers together one on top of the other to form a laminate structure so that the logic voltage carrying layer 11 and system ground layer 12 are adjacent and the data signal carrying layer 10 is on the exterior.
- An additional insulating strip 133 is laid on top of the layer 12.
- the resultant assembly comprises a flexible laminated cable having relatively wide area, tracks the adjacent layers being extremely close to each other.
- This arrangement provides high immunity and additionally minimises inductive losses along the data signal tracks due to the relative closeness of the logic voltage carrying layer 11.
- a suitable terminal 40 is illustrated in Fig. 4. and is adapted to be attached to each end of the data cable 1.
- the terminal 40 has a plurality of spaced contacts 41, end ones 41a and 41b contacting with the respective tabs 114 and 124 of the voltage level layer 11 and ground layer 12.
- Central contacts 41c engage respective tracks of the data signal layer 10.
- the data carrying layer 10 should be placed adjacent the grounded layer 12.
- a data cable is made up of two layers 21 and 22.
- the first of the layers 21 comprises a single copper track 210 attached to an insulating polyester strip 211, a contact tab 214 is provided for connection with a conductor of the type illustrated in Figs. 4a. and 4b.
- the second layer 22 comprises a copper track 220 extending across substantially half of the width of the layer 22 and a plurality of side-by-side signal carrying conductors 225.
- the track 220 and conductors 225 are attached to an insulating polyester strip 221 and the track 220 is provided with a contact tab 224.
- the data cable is formed by glueing the layers 21 and 22 together one on top of the other to form a laminate structure.
- the logic voltage can be applied either to the track 214 or track 224 depending on the system design, ground being connected to the other track.
Landscapes
- Insulated Conductors (AREA)
- Communication Cables (AREA)
Abstract
Flexible input/output data cable for use with programmable controllers. The cable has a ground conductor, a logic level voltage conductor, and a number of signal tracks. The conductors are disposed on two or three layers of flexible plastics material in specified ways to give high immunity to interference and low inductive losses.
Description
Input/Output Data Cable
This invention relates to an input/output (I/O) data cable for use in interconnecting the modular components of a programmable controller.
A programmable controller comprises a processor which controls the operation of the system being controlled by receiving logic signals from a plurality of input modules and feeding logic signals to a plurality of output modules, the input and output modules being connected to the processor through respective data cables. Also the logic level voltage must be fed to the input modules, output modules and processor.
The logic signals which pass between the processor and the input and output modules are subjected to considerable interference especially in the case when the system being controlled is a machine. Accordingly, it is necessary to ensure that the interconnecting data cables have high immunity from such interference.
It is known to interconnect the I/O modules and the processor by means of rigid bus-bars and data cables, the rigid structure allowing high immunity to be designed into the bus-bars and data cables. However, such rigid systems severely restrict the versatility of the controller as regards its physical layout.
Flexible ribbon conductors are known but these do not have the required immunity and also suffer from high inductive losses.
It is an object of the present invention to obviate
or mitigate the above disadvantages.
According to one aspect of the present invention there is provided an input/output data cable for a programmable controller, the cable comprising a flexible laminate made up of three layers, each layer having a conducting part and an insulating part, the first of said layers being adapted to be connected to the system ground, the second of said layers being adapted to carry a logic voltage, and the third of said layers having a plurality of signal tracks for carrying data signals, wherein said first and second layers are adjacent.
According to a second aspect of the present invention there is provided an input/output data cable for a programmable controller, the cable comprising a flexible laminate made up of two layers, each layer having a conducting part and an insulating part, the conducting part of the first of said layers having a single conductin track extending substantially across the whole width of the layer, and the conducting part of the second of said layer being formed by a conducting track extending over part of the width of said layer and by a plurality ofsignal tracks for carrying data signals.
Embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is a top plan view of one embodiment of a data cable made in accordance with said one aspect of
the present invention;
Fig. 2 is a sectional view taken along the line II - II of Fig. 1;
Figs. 3a, 3b and 3c are plan views of the three layers of the data cable of Fig. 1;
Figs. 4a and 4b are perspective and elevational views respectively of a connector for use with the data cable of Fig. 1; and
Figs. 5a and 5b are plan views of the two layers of one embodiment of a data cable made in accordance with said second aspect of the present invention.
Referring to Figs. 1 - 4 of the drawings, an input/ output data cable 1 for interconnecting the modular components of a programmable controller comprises a flexible laminate assembly made up of three layers 10,
11 and 12 each having a conducting part and an insulating part. The layer 11 is used for the logic voltage; the layer 12 is used for the system ground and layer 10 is used for data signals. As illustrated in Figs. 3a and 3b the layers 11 and
12 each comprise a single copper track 110 and 120 attached to an insulating polyester strip 111 and 121 respectively. At the ends of each of the copper tracks 110 and 120 there are provided contact tabs 114 and 124 respectively for connection with a connector as hereinafter described.
The layer 10 comprises a plurality of side-by-side signal carrying conductors 100 extending along the layer
10 and attached to an insulating polyester strip 101.
The data cable is formed by glueing the layers together one on top of the other to form a laminate structure so that the logic voltage carrying layer 11 and system ground layer 12 are adjacent and the data signal carrying layer 10 is on the exterior. An additional insulating strip 133 is laid on top of the layer 12.
The resultant assembly comprises a flexible laminated cable having relatively wide area, tracks the adjacent layers being extremely close to each other. This arrangement provides high immunity and additionally minimises inductive losses along the data signal tracks due to the relative closeness of the logic voltage carrying layer 11. A suitable terminal 40 is illustrated in Fig. 4. and is adapted to be attached to each end of the data cable 1. The terminal 40 has a plurality of spaced contacts 41, end ones 41a and 41b contacting with the respective tabs 114 and 124 of the voltage level layer 11 and ground layer 12. Central contacts 41c engage respective tracks of the data signal layer 10.
The above described arrangement wherein the data signal layer 10 is adjacent the logic voltage carrying layer 11 is suitable for a system which has been designed to fail safe on occurence of a high logic voltage level. Thus, in the event of a short circuit between the data signal layer 10 and the adjacent layer, i.e. the layer 11, the system being controlled by the controller will
fail safe .
Clearly if the system being controlled has been designed to fail safe on a logic level of zero then the data carrying layer 10 should be placed adjacent the grounded layer 12.
These two alternatives are possible with the data cable of this invention since the data signal carrying layer is adjacent- only ore other layer.
Referring now to Figs. 5a, and 5b a data cable is made up of two layers 21 and 22. The first of the layers 21 comprises a single copper track 210 attached to an insulating polyester strip 211, a contact tab 214 is provided for connection with a conductor of the type illustrated in Figs. 4a. and 4b. The second layer 22 comprises a copper track 220 extending across substantially half of the width of the layer 22 and a plurality of side-by-side signal carrying conductors 225. The track 220 and conductors 225 are attached to an insulating polyester strip 221 and the track 220 is provided with a contact tab 224.
The data cable is formed by glueing the layers 21 and 22 together one on top of the other to form a laminate structure. In this embodiment of the data cable the logic voltage can be applied either to the track 214 or track 224 depending on the system design, ground being connected to the other track.
Claims
1. An input/output data cable for a programmable controller, the cable comprising a flexible laminate made up of three layers, each layer having a conductive part and an insulating part, a first of said layers being adapted to be connected to system ground, a second of said layers being adapted to carryj a logic voltage, and a third of said layers having a plurality of signal tracks for carrying data signals, said first and second layers being adjacent.
2. An input/output data cable for a programmable controller, the cable comprising a flexible laminat made up of two layers, each layer having a conductive part and an insulating part, the conductive part of a first of said layers extending across substantially the whole width of the layer, and the conductive part of the second of said layers being formed by a conductive track extending over part of the width of said layer and by a plurality of signal tracks for carrying data signals.
3. A cable according to claim 1 or claim 2, inwhich each layer comprises a flexible plastics substrate and one or more metal strips secured thereto.
4. A cable according to claim 3, in which the substrate is of polyester and the metal is copper.
5. A cable according to any preceding claim, in which the layers are secured together by glueing.
6. A cable according to any preceding claim, in which an additional insulating strip is secured to the top layer.
7. A cable according to any preceding claim, including a terminal end portion of greater width than the remainder of the cable, the signal tracks occupying the centre of the terminal end portion and the other conductive parts being arranged at either side of the signal tracks.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK153280A DK148570C (en) | 1978-08-10 | 1980-04-10 | INPUT / OUTPUT DATA CABLE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7832889 | 1978-08-10 | ||
GB7832889 | 1978-08-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1980000389A1 true WO1980000389A1 (en) | 1980-03-06 |
Family
ID=10498969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1979/000133 WO1980000389A1 (en) | 1978-08-10 | 1979-08-08 | Input/output data cable |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0015287A1 (en) |
JP (1) | JPS6248328B2 (en) |
AU (1) | AU536152B2 (en) |
CA (1) | CA1139855A (en) |
DK (1) | DK148570C (en) |
ES (1) | ES483323A1 (en) |
IE (1) | IE48617B1 (en) |
IT (2) | IT7953510V0 (en) |
WO (1) | WO1980000389A1 (en) |
ZA (1) | ZA794174B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2166603A (en) * | 1984-09-28 | 1986-05-08 | Yazaki Corp | Circuit board wire harness for automobile |
EP0235274A1 (en) * | 1985-08-29 | 1987-09-09 | Micro Motion Inc | Sensor mounting for vibrating structures. |
US4716500A (en) * | 1985-10-18 | 1987-12-29 | Tektronix, Inc. | Probe cable assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0648658U (en) * | 1991-02-14 | 1994-07-05 | 京都機械工具株式会社 | Bathing aid |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3757029A (en) * | 1972-08-14 | 1973-09-04 | Thomas & Betts Corp | Shielded flat cable |
US3796986A (en) * | 1972-07-03 | 1974-03-12 | Bell Telephone Labor Inc | Interconnection system for reusable gang-type connections between flexible printed circuitry and the like |
US3923364A (en) * | 1973-12-06 | 1975-12-02 | Executone Inf Sys Inc | Shielded flexible conductor cable and assembly thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1315907A (en) * | 1970-12-17 | 1973-05-09 | Amp Inc | Flat cables |
JPS49135178A (en) * | 1973-05-02 | 1974-12-26 |
-
1979
- 1979-08-08 WO PCT/GB1979/000133 patent/WO1980000389A1/en unknown
- 1979-08-08 JP JP54501204A patent/JPS6248328B2/ja not_active Expired
- 1979-08-09 CA CA000333483A patent/CA1139855A/en not_active Expired
- 1979-08-09 IE IE1527/79A patent/IE48617B1/en unknown
- 1979-08-10 ZA ZA00794174A patent/ZA794174B/en unknown
- 1979-08-10 IT IT7953510U patent/IT7953510V0/en unknown
- 1979-08-10 AU AU49793/79A patent/AU536152B2/en not_active Ceased
- 1979-08-10 IT IT68651/79A patent/IT1119143B/en active
- 1979-08-10 ES ES483323A patent/ES483323A1/en not_active Expired
-
1980
- 1980-03-11 EP EP79900873A patent/EP0015287A1/en not_active Withdrawn
- 1980-04-10 DK DK153280A patent/DK148570C/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3796986A (en) * | 1972-07-03 | 1974-03-12 | Bell Telephone Labor Inc | Interconnection system for reusable gang-type connections between flexible printed circuitry and the like |
US3757029A (en) * | 1972-08-14 | 1973-09-04 | Thomas & Betts Corp | Shielded flat cable |
US3923364A (en) * | 1973-12-06 | 1975-12-02 | Executone Inf Sys Inc | Shielded flexible conductor cable and assembly thereof |
Non-Patent Citations (1)
Title |
---|
The Electronic Engineer's Design Magazine, Volume 12, No. 14, issued November 8, 1967, Denver (US) "The Interconnection Challenge", see pages 71 to 73. * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2166603A (en) * | 1984-09-28 | 1986-05-08 | Yazaki Corp | Circuit board wire harness for automobile |
EP0235274A1 (en) * | 1985-08-29 | 1987-09-09 | Micro Motion Inc | Sensor mounting for vibrating structures. |
EP0553939A2 (en) * | 1985-08-29 | 1993-08-04 | Micro Motion Incorporated | Coriolis flowmeter |
EP0553939A3 (en) * | 1985-08-29 | 1993-10-13 | Micro Motion Incorporated | Sensor mounting for vibrating structures |
EP0235274B1 (en) * | 1985-08-29 | 1995-10-25 | Micro Motion Incorporated | Sensor mounting for vibrating structures |
US4716500A (en) * | 1985-10-18 | 1987-12-29 | Tektronix, Inc. | Probe cable assembly |
Also Published As
Publication number | Publication date |
---|---|
EP0015287A1 (en) | 1980-09-17 |
AU536152B2 (en) | 1984-04-19 |
IT1119143B (en) | 1986-03-03 |
IT7953510V0 (en) | 1979-08-10 |
DK153280A (en) | 1980-04-10 |
DK148570C (en) | 1985-12-30 |
DK148570B (en) | 1985-08-05 |
JPS6248328B2 (en) | 1987-10-13 |
ZA794174B (en) | 1981-04-29 |
ES483323A1 (en) | 1980-04-01 |
IT7968651A0 (en) | 1979-08-10 |
JPS55500694A (en) | 1980-09-25 |
IE48617B1 (en) | 1985-03-20 |
CA1139855A (en) | 1983-01-18 |
AU4979379A (en) | 1980-03-06 |
IE791527L (en) | 1980-02-10 |
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Designated state(s): BR DK JP US |
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AL | Designated countries for regional patents |
Designated state(s): CH DE FR GB NL SE |