EP0125952B2 - Appareil modulaire à cartes électroniques reliées à un bus par connexion codée - Google Patents

Appareil modulaire à cartes électroniques reliées à un bus par connexion codée Download PDF

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Publication number
EP0125952B2
EP0125952B2 EP84400721A EP84400721A EP0125952B2 EP 0125952 B2 EP0125952 B2 EP 0125952B2 EP 84400721 A EP84400721 A EP 84400721A EP 84400721 A EP84400721 A EP 84400721A EP 0125952 B2 EP0125952 B2 EP 0125952B2
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EP
European Patent Office
Prior art keywords
coding
accordance
connections
stud
elements
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.)
Expired - Lifetime
Application number
EP84400721A
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German (de)
English (en)
French (fr)
Other versions
EP0125952B1 (fr
EP0125952A1 (fr
Inventor
Jean Joly
Yves Oehlert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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Publication date
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Application filed by La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Publication of EP0125952A1 publication Critical patent/EP0125952A1/fr
Publication of EP0125952B1 publication Critical patent/EP0125952B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H01R13/645—Means for preventing incorrect coupling by exchangeable elements on case or base
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/465—Identification means, e.g. labels, tags, markings

Definitions

  • the present invention relates to a modular apparatus such as an apparatus for the acquisition, processing and / or reproduction of digital signals, of the type of programmable logic controllers, calculators and industrial computer systems, instrumentation or transmission, comprising electronic cards connected to a BUS, in particular a printed circuit, by coded connections.
  • the electronic cards can, for example, be central unit cards, power cards, input or output cards.
  • devices of the programmable automaton type are generally housed in a tray, the bottom of which contains a permanently mounted printed circuit and having rows of connections towards the inside of the tray, each of which is intended to receive corresponding connections arranged on the edge d 'an electronic card mounted for example in a flattened case.
  • the boxes are stored side by side in the tray.
  • the front face of at least some of the boxes which is in service substantially in the plane of the opening of the tray, receives a terminal block by which the card is connected to an external central unit, or to the members to be controlled or monitored.
  • the cards or their cases are separable from the tray. It thus appeared the easily understandable need to avoid that a given card or box could be mounted elsewhere than at the location which is assigned to it in the tray. The assembly is thereby facilitated, as are interventions for repairs, tests, or conversions of an existing device.
  • the German utility model 66 05 363 discloses a mechanical coding device intended to avoid connection errors.
  • the two parts to be connected each have a comb.
  • Each comb has its teeth pointing towards the other comb.
  • the teeth of the two combs are selectively broken so that each remaining tooth is opposite a broken tooth from the other comb.
  • This device has many drawbacks.
  • the coding work is long and requires a lot of attention. Its verification is delicate. If a tooth is broken by coding error, the part must be changed. On the other hand, a work of reflection is necessary to determine the codings which will be usable in practice and those which should not be assigned. It must be avoided that a device whose code consists of a relatively small number of remaining teeth can be connected with another device whose code is different and includes more broken teeth including those corresponding to the aforementioned remaining teeth.
  • DE-A25 34 775 describes a device comprising on the one hand a comb with removable teeth and on the other hand a grid, the cells of which, intended to receive the teeth of the comb, can be closed by attached plugs.
  • the coding consists in placing the teeth on the comb according to a certain configuration and in closing all the cells of the grid except those which face the teeth of the comb. This system has all the drawbacks of the device with breakable teeth except that the coding errors in the second device can be repaired without waste.
  • DE-B 24 16 107 describes a third device, specific to devices of the type targeted by the invention, in which the housing carries teeth intended to engage in a profiled slide carried by the tray.
  • the profile of the teeth and that of the slide must correspond for the engagement of the housing to be possible.
  • a modular device comprising electronic cards removably associated with rows of connections carried in openings at the bottom of a tank, and a coding device to avoid the risks of connection errors between the rows of connections and series of contacts arranged on one edge of the electronic cards, this device comprising first coding members carried by the tank bottom in the vicinity of rows of connections respectively associated, and second coding members associated with electronic cards, the first and second coding members being capable of being individualized by their position so that a first and a second coding member are mutually interlocked when the row of connections and the card which carry them are suitable for being mutually connected, and prevent by impossibility of nesting any erroneous connection between a row and a card, the second coding members being carried by a wall associated with the card and directed in service towards the bottom of the tank.
  • the bottom coding members are separate from the connection rows. This avoids having to make rows of complex connections. However, the overall size of the coding members and of the rows of connections is increased, and this can cause problems in accommodating the electrical circuitry at the bottom of the tank.
  • the electrical circuitry is described as being carried on the bottom of the tank or the like. Consequently, the insertion efforts, in particular in the event of inconsistent coding, can be transferred to the circuitry and put the latter in danger of damage.
  • CH-A-535 498 makes it possible to modify the coding of at least one of the combined coding members carried by the card housing and respectively by the bottom of the container or the like.
  • it is the re-coding of the tank bottom or the like which is particularly advantageous, since a card housing has in principle a determined function to which one can often assign an immutable coding.
  • CH-A-535 498 does not describe how the coding members of the tank bottom or the like are fixed, nor how their coding position can be modified. Even if it is admitted that a modification is possible, this requires at least a disassembly requiring access to the rear of the tank bottom or the like.
  • the object of the invention is thus to remedy the aforementioned drawbacks by proposing in a modular device a coding device for the bottom of the receiving tank which is economical to manufacture, easy and quick to code during manufacture and to be re-coded by the user, and which degrades neither the reliability nor the compactness of the modular device as a whole.
  • the modular apparatus is characterized in that the bottom of the tank comprises a printed circuit and an internal wall which is supported independently of the printed circuit and interposed between the printed circuit and the electronic cards and which carries the first organs of coding, in that the rows of connections extend from the printed circuit through said openings, which are formed in the internal wall, and in that at least some of the first coding members are mounted movably relative to the internal wall between their different coding positions, each movable first coding member having an actuation means accessible from the front of the tank bottom to allow, without removing the coding member, to move it from the front of the bottom between its different coding positions.
  • the first coding members it suffices to move them relative to the internal wall, as their movable mounting allows relative to the latter. Thanks to the actuating means, this is easily achievable from the front of the tank. The forces which are possibly generated by this operation are not transmitted to the printed circuit, because it is supported independently. The coding members do not clutter the printed circuit.
  • the movable coding members can be moved in translation, from one predetermined position to the other. However, they are preferably movable between different lockable angular positions relative to the element which carries them.
  • the wall associated with the card and carrying the second coding member can be constituted by a bracket attached to the card or by the rear face of a housing housing the card.
  • the device comprises several first and second movable coding members for coding each connection.
  • Each element of the automaton can thus comprise at least one primary organ of partial coding determining its intrinsic adaptability with another element coded in a corresponding manner, and at least one secondary organ of partial coding determining the restriction of the possibilities of connection according to the contingencies. related to the specific application that is made of the device.
  • the invention then allows the user or the fitter to complete the coding of the card relative to the bin so that, the automaton being devoted to a given application, there can no longer be any inversion between cards which could have been inverted if there had been only the initial partial coding.
  • the user or the editor may wish to specialize elements, for example strictly identical housings. It is for example possible in a given installation that two identical cards are associated with different terminal blocks. Thanks to the second partial code, the user can complete the card code according to the nature of the terminal block he has associated with it.
  • the rows of connections 6 protrude inside the tank by corresponding openings made in the wall 3.
  • In the bottom of the tray are provided with means for urging the circuit 4 towards the wall 3 on which it bears by shoulders (not shown) of the rows of connections 6.
  • Each row 6 is intended to receive a series of male contacts 7 arranged at the rear edge of 'an electronic card 8.
  • Each electronic card 8 is mounted in a housing of substantially flattened parallelepiped shape 9 made of synthetic material.
  • the boxes 9 are stored next to each other in the tray, each opposite a row of connections 6.
  • the boxes 9 can each receive a terminal block (not shown) by which the electronic card 8 is connected for example to the bodies whose operation is to be monitored if it is an input card or to the bodies whose operation is to be controlled if it is an output card.
  • the card 8 can also be a connection card to a calculation unit mounted directly on the front face 11 of the housing 9 or even at a distance from the tank.
  • the box 9 and the tank bottom 1 carry a coding device 12 intended to prevent a box 9 provided with a card 8 having well defined functions from being mounted on a row of connections 6 which, due to the points at which it is connected to the printed circuit 4, is not intended to receive a card 8 of this nature.
  • the coding device 12 is of the mechanical type comprising male and female members which interlock when they are coded in a corresponding manner and when the box 9 is brought towards the bottom of the container 1 so as to engage the contacts 7 in the row of connections 6.
  • the internal wall 3 of the bottom of the container 1 carries, next to the row of connections 6 that they protect, four coding members 13 made of synthetic material, only three of which are shown in FIG. 1 but the four are shown in Figure 2.
  • the housing 9 has a rear face 14 facing in service towards the bottom 1 of the tank and which carries four female coding members 16 of which only three are shown in Figure 1.
  • Each member male coding 13 is located on the wall 3 so as to be able to cooperate with a member 16 correspondingly located on the housing 9, and to fit together if they are coded correspondingly, when the housing 9 is brought towards the bottom 1 so as to make the connection.
  • All of the male coding elements 13 are identical to each other, all of the female coding elements 16 are identical to each other, and each male coding element 13 has a shape allowing it to fit into any of the female coding members 16.
  • Each coding member 13 or 16 is angularly movable, around an axis XX or YY respectively perpendicular to the wall 3 or 14 which carries it, between ten angular positions whose choice determines one of the four unit codes associated with the row of connections 6 or respectively to the housing 9.
  • the male coding members carry eccentrically relative to the axis XX a finger 17 parallel to the latter and directed opposite the wall 3.
  • the female coding members 16 have an orifice 18 having relatively the same axis relative to the YY axis tion as the finger 17 relative to the axis XX.
  • a box 9 can be adapted to a given row of connections 6, we make sure that the angular positions of the four coding members 16, which determine the four unit codes of the box 9, and the four positions angular of the four coding members 13, which determine the four unit codes of the row of connections 6 correspond.
  • the box 9 is brought towards the bottom of the tray 1 with a view to introducing the rear edge of the card 8 into the row of connections 6, each of the fingers 17 is introduced into the orifice 18 of the coding member 16 coming opposite him. If at least one of the members 16 does not have an angular position corresponding to that of the member 13 opposite, the insertion of the card 8 in the row of connections 6 is impossible.
  • the coding member 16 made of synthetic material, comprises a disc 19 whose plane is perpendicular to the axis YY and the periphery of which is connected to a cylindrical neck 21 directed towards the wall 14 of the housing (FIG. 9).
  • the disc 19 has in its center a cylindrical recess 22 directed opposite the wall 14.
  • the disc 18 carries an axial stud 23 engaged in a bore 24 passing through the wall 14.
  • the stud 23 consists of a cylindrical wall having four axial slots 26 extending over a certain length from its free end.
  • the distance measured parallel to the axis between the end of the ramps 31 on the side of the disc 19 and the free end of the neck 21 is substantially equal to the thickness of the wall 14.
  • the disc 19 At the cylindrical recess 22 of the disc 19 corresponds on the opposite face of the latter a cylindrical boss 32. Between the latter and the neck 21, the disc 19 still carries three studs 33 directed axially towards the wall 14.
  • the axes of the studs 33 are all three at the same distance R from the axis YY and they extend axially beyond the neck 21 so as to be able to penetrate into a series of holes 34 made through the wall 14 and distributed angularly around the axis YY (see also in Figure 1 the location of the fourth member 16 not shown).
  • the distance between the axis of the holes 34 and that of the hole 24 is also equal to R.
  • the angular distance separating the studs 33 between them is equal to the angular distance separating two neighboring holes 34 or a multiple thereof.
  • there are ten holes 34 separated from each other by angular intervals of 36 ° from axis to axis while on the member 16, one of the pins 33 is separated from each of the other two by a three times interval 36 ° 108 °.
  • the axis of the orifice 18 which crosses the disc 19 is also at the distance R from the axis YY and is also at an angular distance from the pins 33 which is equal to the angular distance between two holes 34, or to a multiple of the latter.
  • the orifice 18 is diametrically opposite the tenon 33 which is equidistant from the other two tenons 33.
  • the disc 19 carries on its external face ten numerical marks 0 to 9 distributed angularly every 36 °, the zero being constituted by the orifice 18.
  • one of the digital references is located opposite with a fixed indicator reference 36 carried by the wall 14 near each member 16 (FIG. 1).
  • the member 13 comprises a flat disc 37 perpendicular to the axis XX itself consisting of a main body 38 and a tongue 39 connected to the body by an isthmus 41 defined between the bottom of two notches 42. These extend radially on either side of the tongue 39 from the periphery of the disc 37.
  • the notches 42 have a certain circumferential dimension so that the tongue 39 has a certain elasticity in the circumferential direction relative to the body 38 of the disc 37
  • the width and the thickness of the isthmus 41 are small enough that the tongue 39 can flex elastically in the direction of release of the tenon 46 away from the plane of the disc 37.
  • the body 38 On its face directed towards the bottom 1 of the tank, the body 38 carries in the center of the disc 37 a stud 43 which is quite similar to the stud 23 of the members 16 except that it is shorter than the latter because the disc 37 bears directly against the bottom 1 of the baccalaureate and not through diary of a neck such as 21.
  • the post 43 directed along the axis XX is in service engaged in a bore 44 ( Figures 1, 2 and 9) and its snap-fit lugs 28 are engaged behind the shoulder formed by the internal face of the wall 3 without bending of the tongues 27.
  • the tongue 39 carries on its face directed towards the bottom 1 of the tank a tenon 46 which in service is engaged in one of a choice of a series of ten holes 47 made through the wall 3 of the tank in locations distributed angularly around of axis XX.
  • the finger 17 is fixed to the external face of the body 38 of the disc 37 in a position diametrically opposite to the stud 46.
  • the axis of the finger 17 is at the distance R from the axis XX.
  • the angular position of the holes 47 around the axis XX is such that when any of them is occupied by the pin 46, the finger 17 is located opposite one of the holes 34 made in the wall 14 of a housing 9 supposed to be brought towards the bottom 1 of the tank so that its card 8 is introduced into the row of connections 6 considered.
  • the orifice 18 coincides with the bore 34 opposite which the finger 17 is located, and after connection, the finger 17 is engaged in the orifice 18 and in the hole 34 with which it coincides.
  • the length of the finger 17 is such that when the coding of the members 13 and 16 is not consistent, the finger 17 abutting the disc 19 of the member 16 sufficiently prevents the housing 9 from advancing towards the bottom of the tank 1 for that the card cannot meet the contact elements of connection row 6 at all.
  • the body 38 of the disc 37 also carries in the central position on its outer face a boss 48 which is housed in the recess 22 of the member 16 when the members 13 and 16 are mutually fitted.
  • the boss 48 carries a slot 49 for the introduction of a screwdriver 51 ( Figure 10).
  • the tenon 46 ( Figures 6 and 10) has a cylindrical base of very small axial dimension so that it does not occupy the entire thickness of the holes 47. The end of the tenon 46 is curved.
  • each row of connections 6 are mounted four members 13 as shown for one of the rows in FIG. 2.
  • a screwdriver 51 (FIG. 10) is then introduced into the slot 49 of each member 13 and one exercises to using the screwdriver 51 a rotational force on the member 13. Given the low height of the stud 46, this effort is sufficient to cause the stud 46 to come out of the bore 47 by bending the tongue 39 relative to the disc 37 in the direction of release of the post 46.
  • the disc 37 can contribute to this release of the post 46 by slightly detaching from the wall 3 by penetration of the release ramps 31 into the bore 44 and slight closure of the corolla formed by the four tabs 27. That -this carries next to each member 13 an indicator mark 52.
  • Any coding is thus characterized by a four-digit number and to carry out the coding it suffices to give each member 13 an angular position such that ue the digital marker located opposite the indicator marker 52 corresponds to a respective one of the digits of the code.
  • the boxes 9 are then correspondingly coded by snap-fastening the members 16 at the four locations provided. It is arranged to snap each member 16 directly into an angular position such that the number which is opposite the associated mark 36 is the same as the number selected with the corresponding member 13 associated with a row of connections 6 adapted to receive the housing 9 considered. It is in fact made so that when the same figure is selected for two members 13 and 16 positioned so as to be able to cooperate, the finger 17 of the member 13 is opposite the orifice 18 of the member 16. For to change the code of a box 9, it is necessary to extract the members 16 which are not set to the correct figure and re-engage them in the new angular position.
  • the extraction can be done from the outside of the box 9 thanks to the release ramps 31 carried by the latching spouts 28 of the stud 23. It will however be noted that intentionally, it was made so that the modification of the code of the boxes 9 is relatively difficult because each box 9 contains a specific card 8 to which it is practical to associate an invariable code.
  • the members 16 can, if necessary, undergo a slight angular displacement during the nesting in the orifices 18.
  • the complete four-digit code of each row of connections 6 or of each box 9 comprises a partial two-digit code (the two from the top in FIG. 2) which is formed at the factory and which is intended not to allow to insert in the row of connections 6 only cards 8 intrinsically compatible with them.
  • the four-digit code also includes a second partial code which is left available to further restrict the possibilities of connections depending on the particular use made of the programmable controller. In the factory, this second partial code is the same for all the rows of connections 6 and all the boxes 9. This second partial code is "00" when it leaves the factory in the example shown. Regarding the boxes 9, rather than pre-coding the second partial code "00" at the factory, two coding members 16 can be supplied separately that the user can snap into the position corresponding to the second desired partial code.
  • the coding device according to the invention considerably simplifies the coding operations, removes both the parts to be broken and the additional parts to be kept in stock and excludes any possibility of connection if the codes are different.
  • the manufacture of the tank bottom and the mounting of the first coding members is particularly simple.
  • the invention also offers the user the unprecedented but particularly interesting possibility of supplementing the coding as a function of the extrinsic data with a device of the automaton type.
  • the coding members could consist of notched cursors, one carrying a finger which can engage in an orifice of the other when the codings are concordant.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Toys (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
EP84400721A 1983-04-15 1984-04-11 Appareil modulaire à cartes électroniques reliées à un bus par connexion codée Expired - Lifetime EP0125952B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8306176A FR2544557B1 (fr) 1983-04-15 1983-04-15 Dispositif et procede de codage pour la connexion d'elements dans un automate programmable
FR8306176 1983-04-15

Publications (3)

Publication Number Publication Date
EP0125952A1 EP0125952A1 (fr) 1984-11-21
EP0125952B1 EP0125952B1 (fr) 1987-07-15
EP0125952B2 true EP0125952B2 (fr) 1992-09-16

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ID=9287896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400721A Expired - Lifetime EP0125952B2 (fr) 1983-04-15 1984-04-11 Appareil modulaire à cartes électroniques reliées à un bus par connexion codée

Country Status (7)

Country Link
US (1) US4595250A (enrdf_load_stackoverflow)
EP (1) EP0125952B2 (enrdf_load_stackoverflow)
JP (2) JPS60500741A (enrdf_load_stackoverflow)
CA (1) CA1204860A (enrdf_load_stackoverflow)
DE (1) DE3464826D1 (enrdf_load_stackoverflow)
FR (1) FR2544557B1 (enrdf_load_stackoverflow)
WO (1) WO1984004210A1 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
FR2544557A1 (fr) 1984-10-19
CA1204860A (fr) 1986-05-20
JPS60500741A (ja) 1985-05-16
JPH038879U (enrdf_load_stackoverflow) 1991-01-28
EP0125952B1 (fr) 1987-07-15
FR2544557B1 (fr) 1986-05-02
EP0125952A1 (fr) 1984-11-21
DE3464826D1 (en) 1987-08-20
US4595250A (en) 1986-06-17
WO1984004210A1 (fr) 1984-10-25
JPH0528702Y2 (enrdf_load_stackoverflow) 1993-07-23

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