WO2012009820A1

WO2012009820A1 - Electrical circuit having a connecting part protected against reverse polarity

Info

Publication number: WO2012009820A1
Application number: PCT/CH2011/000145
Authority: WO
Inventors: Philipp Scherler; Rolf Joss; Rafael Storz
Original assignee: Uster Technologies Ag
Priority date: 2010-07-21
Filing date: 2011-06-14
Publication date: 2012-01-26
Also published as: JP2013535746A; CN103209917A; CN103209917B; EP2595908A1; EP2595908B1; CH703465A1

Abstract

The electrical circuit comprises a connecting part (3) on the circuit side, which has a plurality of contact elements (8) for a detachable electrical plug-in connection, wherein all contact elements (8) of the connecting part (3) on the circuit side are arranged in such a way that said contact elements can be mapped to themselves by means of at least one congruence mapping (91) different from the identical mapping. The contact elements (8) are assigned with regard to the circuit in such a way that only contact elements (8) that are electrically compatible with each other are mapped to each other in the at least one congruence mapping (91). Thus injury to persons and/or damage to property in the event of reverse polarity is minimized without a mechanical and/or electrical reverse polarity protection element being necessary.

Description

ELECTRIC CIRCUIT WITH PURPOSE PROTECTED

CONNECTION PART

AREA OF EXPERTISE

The present invention is in the field of reverse polarity protection

Connecting parts of electrical circuits. It relates to an electrical circuit, a combination of an electrical circuit and a multi-core electrical line and method for designing an electrical circuit or a combination of an electrical circuit and a multi-core electrical line, according to the

Preambles of the independent claims. A preferred application is a yarn cleaner measuring head, as used for quality control on spinning or winding machines.

STATE OF THE ART

To ensure the yarn quality so-called yarn cleaners are used on spinning or winding machines. Such a yarn cleaner is z. B. from the ΕΡ-Γ249'422 A2 known. It includes a yarn cleaner gauge with at least one sensor which senses the moving yarn and measures at least one parameter of the yarn. Frequently used sensor principles are the capacitive (see eg EP-0'924'513 AI) or the optical (see eg WO-93/13407 AI). The aim of yarn cleaning is to detect defects such as thick spots, thin spots or foreign substances in the yarn, to evaluate them according to certain quality criteria and to eliminate them if necessary. The construction of a yarn cleaner measuring head is disclosed in US Pat. No. 6,422,072 B1 or EP-1'302'426 A2

described. For both the spinning and winding machines, each yarn cleaner measuring head is equipped with a connection cable that is a few decimeters to a few meters long for power supply and data transmission. This connection cable is directly or indirectly connected to a bus line, on the one hand more Garnreinigermessköpfe and on the other hand, a central cleaner control unit are connected. In this case, custom-made connection cables are usually used for the respective application. From WO-2009/143642 AI a Garnreinigermesskopf with a detachable cable connection is known. The yarn cleaner gauge comprises a gauge head housing and an electrical circuit housed therein. The electrical circuit can be connected via a measuring head side connection with an electrical connection cable. In this case, the measuring head-side connection is designed to produce a releasable connection between the yarn cleaner measuring head and the connection cable. Such a detachable

On the one hand, connection is advantageous because it makes the removal, installation or replacement of the yarn cleaner measuring head significantly easier and safer. On the other hand, it brings with it the danger of "reverse polarity." In this document, the term "electrical connection" is understood to mean the manufacture of electrical connection connections

Device manufacturers are not provided and may cause damage to persons and / or property.

When DC powering a device, two types of reverse polarity protection are known:

1. Mechanical reverse polarity protection. By a non-rotationally symmetric

Mechanical design of plug and socket ensures that the two electrical connections (plus and minus) can not be made in the wrong polarity.

2. Electrical reverse polarity protection. Suitable circuits and components ensure that no damage occurs when electrical voltages are applied in the wrong polarity in the connected device. Such circuits and components may include diodes, rectifiers or relays.

The electrical reverse polarity protection in the DC power supply of a device is a relatively simple case, because only two similar connections are involved, which differ only by their polarity (plus and minus). At the

Garnreinigermesskopf the situation is more complicated in that here over a single connection cable different power supplies and in addition also the transmission of various data must be made. This typically requires about ten parallel lines. The to the different lines applied voltages are completely different and can, depending on the line between zero (mass connection) over a few volts (logic signals) up to about 60 V.

(Power supply for the cutting tool) amount. If the latter high voltage is accidentally applied to a line not intended for it, damage to persons and / or to the yarn cleaner system may result. Not only the incorrectly connected yarn cleaner measuring head, but also, via bus cables, other measuring heads, the central cleaning control unit and even the central control unit

Machine control unit to be affected. Such damage must be avoided. Of course, a mechanical reverse polarity protection can also be used in the yarn cleaner. However, simple mechanical measures can be overcome by applying high forces. A secure mechanical reverse polarity protection z. As the commercially available connector of the widely used type D-Sub 15 with 15 contact elements. However, such connectors are relatively expensive and would increase the cost in large quantities Garnreinigermessköpfe.

Therefore, cheaper connectors such. Hirose DF11-16DS-2C available from Hirose Electric Co., Ltd., Tokyo, Japan.

PRESENTATION OF THE INVENTION

It is therefore an object of the present invention to provide a nonmechanical

Reverse polarity protection for an electrical circuit, comprising a circuit-side connecting part with a plurality of contact elements for a detachable electrical

Plug connection to create. Another object is a non-mechanical reverse polarity protection for a combination of an electrical circuit and a

multi-core electrical line, which combination a detachable electrical

Connection of a first connecting part with a plurality of contact elements and a second connecting part with a plurality of contact elements includes create. Yet another object is to provide a method for reverse polarity protected design of an electrical circuit and the reverse polarity protected design of a combination of an electrical circuit and a multi-core electrical line. On special attention should be paid to the application of the circuitry, combination and procedures associated with the yarn cleaning system.

These and other objects are achieved by the inventive electrical circuit, the inventive combination of an electrical circuit and an electrical connection cable and the inventive design methods, as defined in the independent claims. Advantageous embodiments are given in the dependent claims. The invention is based on the idea of a "geometric" reverse polarity protection, which is based neither on the mechanical design of the electrical connection nor on a special electrical circuit In the ideal case even works with the common

Bus line connected yarn cleaner system with the exception of reverse polarity

Garnreinigermesskopfes continue.

Accordingly, the electrical circuit according to the invention comprises a

circuit-side connecting part with a plurality of contact elements for a detachable electrical connection, wherein all the contact elements of the circuit side

Connection parts are arranged such that they can be imaged by at least one of the identical mapping different congruence mapping on itself. The contact elements are so occupied in relation to the circuit that in the at least one congruence map only electrically compatible with each other

Contact elements are imaged on each other.

Which contact elements are electrically compatible with each other and which are not, a know the electrical circuit expert in the field of electrical engineering very well. So z. B. two contact elements for signal input voltages of the same magnitude electrically compatible with each other, even if the two signals carry very different information. By contrast, a laid on mass connection contact element with a contact element for the power supply would be electrically incompatible with each other, because in their mutual contact the Power supply was shorted and the voltage applied to circuit elements that are not designed for this purpose.

Based on such and similar considerations, some criteria for the assignment of the contact elements can be set up. The contact elements should in relation to the

Electrical circuit according to the invention can be assigned in such a way that at least one of the following criteria is fulfilled in the case of the at least one congruent mapping:

(a) directly related or intended for the same purpose

Contact elements are mapped to each other;

(b) each contact element having a first input resistance provided for transmitting an input voltage to the circuit is applied to a contact element having a second input resistance which is at least a thousand times greater than the first input resistance, or to a contact element provided for transmitting an input voltage of the same magnitude to the circuit displayed; and

(C) each provided for the transmission of an output voltage from the circuit contact element is a likewise for the transmission of a

Output voltage provided from the circuit provided contact element.

In the electrical circuit according to the invention, at least two of the three criteria (a) to (c) and preferably all three criteria (a) to (c) can be fulfilled.

The directly interconnected contact elements mentioned in criterion (a) can, for. B. be mass connections. The in criterion (b) said input voltage is a z. B. a substantially constant supply voltage having an absolute value between 3 V and 120 V or a time-varying signal voltage with a value between -24 V and +24 V. The in criterion (b) said second input resistance is preferably at least 10 kü, so that the contact element with the second input resistance is in any case high impedance. Where mentioned in criterion (b)

Contact element with the second input resistance may be a contact element not used in the circuit. The output voltage mentioned in criterion (c) is z. B. a time-varying signal voltage with a value between -12 V and +12 V. In a particular embodiment, at most half of all the contact elements in the circuit may be utilized, and each contact element used is mapped to an unused contact element. In a preferred embodiment, the erfmdungsgemässische circuit is incorporated in a Garnreinigermesskopf. The contact elements are then preferably provided for purposes of the following quantity: first constant supply voltage, preferably between +20 V and +60 V; second constant supply voltage, preferably between +10 V and +15 V; third constant supply voltage, preferably between +3 V and +5 V; Signal line for a one-sided serial

Transmitting an input signal into the circuit, preferably between 0 V and 5 V; Signal line for a one-sided serial transmission of an output signal from the circuit, preferably between 0 V and 5 V; Signal line for a two-sided serial signal transmission, preferably between -10 V and +15 V; Ground connection. In addition to the yarn cleaner mentioned as an example, however, the invention can be used in many other devices in various technical fields.

The congruence mapping is z. B. a rotation, preferably by 180 °, and / or a translation. The releasable electrical connection may be a plug connection with 16 contact elements, which are arranged in two rows of eight equidistant contact elements.

The invention also relates to a method for designing an electrical circuit comprising a circuit-side connecting part with a plurality of contact elements for a detachable electrical connection, wherein all contact elements of the

circuit-side connecting part are arranged such that they can be imaged on themselves by at least one of the identical mapping different congruence mapping. The contact elements are so occupied in relation to the circuit that in the at least one congruence map only electrically compatible with each other

Contact elements are imaged on each other.

The preferred embodiments of the inventive method for designing an electrical circuit are carried out such that the method in each case one of preferred embodiments of the electrical circuit results, as described above.

Furthermore, the invention relates to a combination of an electrical circuit and a multi-core electrical line. The combination includes a releasable electrical connection of a first connecting part with a plurality of contact elements and a second connecting part with a plurality of contact elements. The contact elements of the two connecting parts are arranged so that they are different in at least two different ways by at least one of the identical figure

Congruenzabbildung one of the two connecting parts emerge apart, are connectable to each other. The contact elements of the first connection part and / or the contact elements of the second connection part are so occupied that in the at least one congruent image only electrically compatible with each other

Contact elements are imaged on each other.

The preferred embodiments of the inventive combination are analogous to those of the inventive electrical circuit, as described above. The releasable electrical connection may be at any point of the

inventive combination. In a preferred embodiment, it is a plug connection between the electrical circuit and an electrical connection cable; the first connection part is a circuit-side one

Connecting part, preferably a plug, and the second connecting part is a cable-side connecting part, preferably a coupling. Moreover, the invention also relates to a method for designing a combination of an electrical circuit and a multi-core electrical line. The combination includes a releasable electrical connection of a first connection part with a plurality of contact elements and a second connection part with a plurality

Contact elements. The contact elements of the two connecting parts are arranged such that they can be connected to one another in at least two different ways, which emerge from one another by at least one congruent image of one of the two connecting parts which is different from the identical image. The

Contact elements of the first connection part and / or the contact elements of the second Connection parts are assigned in such a way that only electrically compatible contact elements are imaged onto one another in the at least one congruent image.

The preferred embodiments of the method according to the invention for designing a combination of an electrical circuit and a multi-core electrical line are carried out such that the method results in each case one of the preferred embodiments of the combination, as described above.

The invention is applicable to any electrical circuit. Although a yarn cleaner system is given as a preferred application example in this document, this should by no means be understood as limiting the generality of the invention.

Thanks to the invention, the effects of reverse polarity are minimized. Damage to persons and / or property is virtually ruled out, so that the device containing the circuit, for example a yarn cleaner measuring head, is safer. A mechanical and / or electrical reverse polarity protection can be made less expensive or omitted altogether. This is the device containing the circuit

cheaper to produce.

TITLE OF DRAWINGS

Hereinafter, preferred embodiments of the invention will be described with reference to FIGS

Drawings explained in detail.

FIG. 1 shows a combination according to the invention of an electrical circuit in a yarn cleaner measuring head and of an electrical connection cable in a partially disclosed perspective view.

FIGS. 2-5 show four embodiments of an electrical plug connection in a combination of a circuit and a cable according to the invention in a schematic plan view. EMBODIMENT OF THE INVENTION

FIG. 1 illustrates a preferred application of the present invention, namely an electronic granule cleaning head 1 with a detachable electrical

Connecting cable 4. The yarn cleaner measuring head 1 includes a measuring head housing 1 1 for receiving a yarn sensor, an electronic circuit, a Garnschneidzeugs and / or other components. The connection cable 4 serves both the

Power supply of the yarn cleaner measuring head 1 as well as the data transmission to and from the yarn cleaner measuring head 1. Preferably, it is a multi-core shielded connection cable. In the example of FIG. 1, the connection cable 4 is based on a commercially available 15-wire game port cable, in which a coupling in a coupling housing 5 has been attached to a measuring head end. At the end facing away from Garnreinigermesskopf 1 end the connection cable 4 carries a plug 7, z. As a commercially available connector of the widely used type D-Sub 15, for connecting the connecting cable 4 to a (not shown)

Purifier section electronics, to a (not shown) bus line which is connected to a central cleaner control unit, or to another component.

In FIG. 1, the measuring head housing 11 is partially exposed, and the coupling housing 5 is detached from the measuring head housing 11. Thanks to the disclosure of the measuring head housing 1 1 recorded in the interior of the measuring head housing 1 1 PCB 2 can be seen, which carries at least parts of an electrical circuit 21. In the printed circuit board 2 is a measuring slot 22, which serves for receiving a (not shown) to be cleaned yarn and to which a (not shown) yarn sensor for scanning the yarn is attached.

To produce a detachable electrical connection between the circuit 21 and the connecting cable 4, the yarn cleaner measuring head 1 is equipped with a circuit-side connecting part 3 and the connecting cable 4 with a cable-side connecting part 6. In the embodiment of Figure 1, the releasable electrical connection is designed as a plug connection. The circuit-side connecting part 3 may be embodied as a plug mounted on the printed circuit board 2. Preferably, it is an indirect multi-pin connector 3, the z. B. is soldered on the circuit board 2. At his Meßkopfseitigen end carries the connection cable 4 to the connector 3 matching coupling 6, z. Hirose DFI 1-16DS-2C, available from Hirose Electric Co., Ltd., Tokyo, Japan. The plug 3 and the coupling 6 together form a connector.

Of course, in this connector, a mechanical Verpolungsschutz be provided, which should prevent the plug 3 to a not

intended manner is inserted into the coupling 6, which would threaten a risk to persons and property. But experience shows that a mechanical

Reverse polarity protection can be bypassed intentionally or unintentionally. Therefore, further measures for reverse polarity protection are desired as proposed by the present invention.

In addition to the electrical connection, a detachable mechanical connection between the measuring head housing 11 and the coupling housing 5 is provided. It is designed as a snap connection or snap connection. The electrical and mechanical connections are separate in the embodiment discussed herein, but need not necessarily be. FIG. 2 shows a first embodiment of an electrical plug connection in a combination according to the invention of a circuit 21 and a cable 4 (see FIG. 1). A circuit-side connecting part 3 may, for. B. be designed as a plug and a cable-side connecting part 6 as a matching coupling. Both connecting parts are shown schematically in Figure 2 as rectangles; on mechanical details of the connection is not entered. Plug 3 and coupling 6 each have 16 contact elements 8, z. B. in the form of contact pins or contact openings, which are arranged and designed so that in the connected state, the associated contact elements 8 contact each other electrically. In the embodiment of Figure 2, the 16 contact elements 8 are arranged in two rows of eight contact elements 8 with a mutual distance of 2 mm and numbered with corresponding atomic numbers 1-16. The matrix-shaped arrangement of the contact elements 8 in the connector of Figure 2 allows a rotation (indicated by an arrow 91) of the coupling 6 relative to the plug 3 by 180 ° about a center of rotation 90, wherein after rotation 91 again an electrical connector between the two connecting parts 3, 6 can be produced. (It is assumed here that mechanical reverse polarity protection does not exist or does not work well enough.) The plug 3 and the coupling 6 can therefore be connected to one another in two different ways, which are separated by a rotation 91 of the coupling 6. However, different contact elements 8 are associated with each other in the two types. Table 1 shows the two different assignments of the contact elements 8.

Table 1 The different contact assignments can without the inventive

A problem because only one type is provided and in the other, unforeseen nature damage to persons and / or things may arise. The invention solves this problem by a geometric reverse polarity protection. In this case, the contact elements 8 are so occupied in relation to the circuit that during the rotation 91 only electrically mutually compatible contact elements 8 are imaged on each other. For this purpose, it is advantageous to make the assignment of the contact elements 8 according to specific criteria, which will be discussed below. An electrically compatible assignment is given by way of example in Table 2: Connector contact element No. Purpose Voltage (V)

1 mass connection

2 Not used

3 power supply +4

4 mass connection

5 power supply +15

6 mass connection

7 signal output 0..4

8 communication line -10 .. + 15

9 communication line -10 .. + 15

10 signal output 0..4

11 signal input 0..4

12 Not used

13 mass connection

14 signal input 0..4

15 Power supply 20..60

16 mass connection

Table 2

The inventive criteria are described below with reference to the above

Occupancy example explained:

(a) directly related or intended for the same purpose

Contact elements 8 are imaged on each other.

Examples: Bulk connections on plug contacts Nos. 1, 16 and 4, 13.

(b) Each intended for the transmission of an input voltage in the circuit 21 contact element 8 having a first input resistance is applied to a contact element 8 with a second input resistance which is at least a thousand times larger than the first input resistance, or one for the transmission of a similar

Input voltage shown in the circuit 21 provided contact element 8. Examples: The power supply on male contact element no. 3 and the keyway signal on male contact element no. 14 are both limited to 4 V and thus similar. The voltage supply on plug contact element no. 15 is mapped to the unused and thus high-resistance plug contact element no. Each intended for the transmission of an output voltage from the circuit 21 contact element 8 is imaged on a likewise provided for transmitting an output voltage from the circuit 21 contact element 8.

Examples: Communication on plug contact elements Nos. 8 and 9.

Signal outputs on plug contact elements Nos. 7 and 10.

FIG. 3 shows a second embodiment of an electrical plug connection in a combination according to the invention of a circuit 21 and a cable 4. Here, the outer shapes of the two connection parts 3, 6 are circular, and the contact elements 8 are arranged on a circle. Because of the not equidistant arrangement of

Contact elements 8, the two connecting parts 3, 6 are rotated by 120 ° and 240 ° with respect to each other about a center of rotation 90, wherein after each rotation 92, 93 again an electrical connector between the two connecting parts 3, 6 can be made. So there are three different types of connections whose

Contact assignments are summarized in Table 3.

A third embodiment of the electrical connector is shown in FIG. Here, the congruence map is not rotation, but a translation 94 of the one connecting part 6 with respect to the other connecting part 3. The scarf tion-side connecting part 3 has five contact elements 8, while the cable-side connecting part 6 has only three. Two contact elements 8 of the circuit-side connecting part 3 thus always remain unused. The contact assignments of the two possible

Connection types are listed in Table 4. Circuit-side contact element no. 1 2 3 4 5

Cable-side contact element No. (before translation) 1 2 4

Cable-side contact element No. (after translation) 1 2 4

Table 4

Figure 5 shows a fourth embodiment of the electrical connector. The circuit-side connecting part 3 here has only a row of eight equidistant contact elements 8, while the cable-side connecting part 6 has two such rows, one of which always remains unused. The numbering of the contact elements 8 is analogous to FIG. 2. As congruence mapping, both a rotation 95 by 180 ° and a translation 96 are possible. This results in four possible connection types whose contact assignments are summarized in Table 5.

Also in the embodiments of FIGS. 3-5, a geometric

Reverse polarity protection according to the present invention are used. For this purpose, electrical compatibility of the contact elements, preferably by

Application of the mentioned criteria (a), (b) and / or (c) produced. In the example of FIG. 5, in each case two contact elements 8 of the cable-side connecting part 6 (ie Nos. 1 and 2, 3 and 4, 15 and 16) lying beneath one another can be connected in pairs, so that in pure translation (fourth line of Table 5) the criterion (a) is used: directly connected contact elements 8 are imaged onto each other. For electrical compatibility during rotation (lines 3 and 5 of Table 5) may require further action.

For the sake of simplicity, the embodiments discussed above refer to the example of a plug connection between the circuit 21 and the connection cable 4 (see FIG. 1). However, the present invention is not limited to this example. First of all, the detachable electrical connection does not need to be a plug connection. Clamping and other detachable electrical connections are also possible. And second, the releasable electrical connection may be at a different location from the combination of the circuit 21 and the electrical line connected to the circuit 21. The drawn in Figure 1 D-Sub-15 connector 7 on the of

Garnreinigermesskopf 1 opposite end of the connection cable 4 is indeed mechanically well protected against reverse polarity. However, it would be conceivable to use a simpler and less expensive detachable electrical connection without mechanical reverse polarity protection at that point. In such an alternative solution, the

inventive idea of the geometric reverse polarity protection to the connection between the cable 4 and the (not shown) Purigersektionselektronik or the (not shown) bus line are applied. Analog can the

geometric reverse polarity protection according to the invention at a further from the

Circuit 21 remote electrical connection, but which is electrically connected to the circuit 21, are applied.

The present invention is therefore not limited to the embodiments discussed above. With knowledge of the invention, the skilled person will be able to derive further variants, which also belong to the subject of the present invention. The invention is applicable to any electrical circuit.

LIST OF REFERENCE NUMBERS

1 Gamreiniger measuring head

1 1 sensor housing

2 circuit board

21 electrical circuit

22 measuring slot

3 circuit-side connecting part

4 connection cables

5 coupling housing

6 cable-side connecting part

7 Plug on the cable end facing away from the Gamreinigermesskopf

8 contact elements

90 center of rotation

91, 92, 93, 95 rotations

94, 96 translations

Claims

An electrical circuit (21) comprising a circuit-side connection part (3) having a plurality of contact elements (8) for a detachable electrical connection, wherein all the contact elements (8) of the circuit-side connection part (3) are arranged such that they pass through at least one of the identical illustration different congruence maps (91-96) can be mapped on themselves,

characterized,

in that the contact elements (8) are so occupied in relation to the circuit (21) that in the at least one congruent image (91-96) only contact elements (8) which are compatible with one another electrically are imaged onto one another.

The electrical circuit (21) of claim 1, wherein the contact elements (8) are populated with respect to the circuit (21) so that at least one of the following criteria is satisfied in the at least one match map (91-96):

(a) contact elements (8) directly connected or intended for the same purpose are mapped to each other;

(b) each contact element (8) having a first input resistance provided for transmitting an input voltage to the circuit (21) is applied to a contact element (8) having a second input resistance which is at least a thousand times greater than the first input resistance, or to a transmission an input voltage thereof

Magnitude in the circuit (21) provided contact element (8) shown; and

(c) each contact element (8) provided for transmitting an output voltage from the circuit (21) is imaged onto a contact element (8) also provided for transmitting an output voltage from the circuit (21).

The electrical circuit (21) of claim 2, wherein at least two of the three criteria (a) to (c) and preferably all three criteria (a) to (c) are satisfied. Electrical circuit (21) according to claim 2 or 3, wherein said in criterion (a) said directly interconnected contact elements (8) are ground connections. 5. Electrical circuit (21) according to any one of claims 2-4, wherein said in criterion (b) said input voltage is a substantially constant supply voltage having an absolute value between 3 V and 120 V or a time-varying signal voltage having a value between -24 V. and +24 V is. 6. Electrical circuit (21) according to any one of claims 2-5, wherein said in criterion (b) said second input resistance is at least 10 kQ. 7. Electrical circuit (21) according to claim 6, wherein said in criterion (b) contact element (8) with the second input resistance in the circuit (21) unused contact element (8).

8. An electrical circuit (21) according to any one of claims 2-7, wherein said in criterion (c) said output voltage is a time-varying signal voltage having a value between -12 V and +12 V is.

9. Electrical circuit (21) according to one of the preceding claims, wherein

At most half of all contact elements (8) in the circuit (21) is used and each used contact element (8) is displayed on an unused contact element (8).

10. Electrical circuit (21) according to any one of the preceding claims, wherein the circuit (21) in a Garnreinigermesskopf (1) is installed.

11. An electrical circuit (21) according to claim 10, wherein the contact elements (8) are provided for purposes of the following amount: first constant

Supply voltage, preferably between +20 V and +60 V; second constant supply voltage, preferably between +10 V and +15 V; third constant supply voltage, preferably between +3 V and +5 V; Signal line for a one-sided serial transmission of an input signal into the circuit (21), preferably between 0 V and 5 V; Signal line for a one-sided serial transmission of an output signal from the circuit (21), preferably between 0 V and 5 V; Signal line for a two-sided serial signal transmission, preferably between -10 V and +15 V; Ground connection.

12. Electrical circuit (21) according to one of the preceding claims, wherein the congruence map (91, 92, 93, 95) is a rotation, preferably by 180 °, and / or a translation (94, 96).

13. Electrical circuit (21) according to claim 12, wherein the releasable electrical

Connection is a plug connection with 16 contact elements (8), which are arranged in two rows of eight equidistant contact elements (8). 14. A method for designing an electrical circuit (21), which a

circuit-side connecting part (3) with a plurality of contact elements (8) for a detachable electrical connection, wherein

all the contact elements (8) of the circuit-side connection part (3) are arranged such that they can be imaged onto themselves by at least one congruent image (91-96) which is different from the identical image,

characterized,

in that the contact elements (8) are covered with respect to the circuit (21) such that in the at least one congruence map (91-96) only electrical

mutually compatible contact elements (8) are imaged on each other.

15. Combination of an electrical circuit (21) and a multi-core electrical line (4), which combination a detachable electrical connection of a first connecting part (3) with a plurality of contact elements (8) and a second connecting part (6) with a plurality of contact elements (8) wherein the contact elements (8) of the two connecting parts (3, 6) are arranged in at least two different ways, which are characterized by at least one congruent image (91-96) of one of the two connecting parts (3, 6) emerge apart, are connectable to each other, characterized,

in that the contact elements (8) of the first connection part (3) and / or the

Contact elements (8) of the second connection part (6) are assigned such that in the at least one congruence mapping (91-96) only electrically compatible contact elements (8) are imaged on each other.

Combination according to claim 15, wherein the contact elements (8) of the first

Connecting parts (3) and / or the contact elements (8) of the second connection part (6) are assigned such that in the at least one congruence mapping (91-96) at least one of the following criteria is met:

Magnitude in the circuit (21) provided contact element (8) shown; and

(c) each contact element (21) provided for transmitting an output voltage from the circuit (21) is imaged onto a contact element (8) also provided for transmitting an output voltage from the circuit (21). 17. A combination according to claim 16, wherein at least two of the three criteria (a) to (c) and preferably all three criteria (a) to (c) are met.

18. A combination according to claim 16 or 17, wherein said in criterion (a) directly interconnected contact elements (8) are ground connections.

A combination according to any one of claims 16-18, wherein the input voltage referred to in criterion (b) comprises a substantially constant supply voltage Absolute value between 3 V and 120 V or a time-varying one

Signal voltage with a value between -24 V and +24 V is.

20. A combination according to any one of claims 16-19, wherein said in criterion (b) said second input resistance is at least 10 kQ.

21. A combination according to claim 20, wherein said in criterion (b)

Contact element (8) with the second input resistance in the circuit (21) is not used contact element (8).

A combination according to any one of claims 16-21, wherein the output voltage referred to in criterion (c) is a time-varying signal voltage having a value between -12 V and +12 V.

A combination as claimed in any one of claims 15-22, wherein at most half of all the contact elements (8) in the circuit (21) are utilized and each used

Contact element (8) is displayed on an unused contact element (8).

Combination according to one of claims 15-23, wherein the releasable electrical connection is a plug connection between the electrical circuit (21) and an electrical connecting cable (4), the first connecting part (3) is a circuit-side connecting part, preferably a plug, and the second Connecting part (6) is a cable-side connecting part, preferably a clutch.

A combination according to any of claims 15-24, wherein the circuit (21) is incorporated in a yarn cleaner gauge (1).

A combination according to claim 25, wherein the contact elements (8) are provided for purposes of the following amount: first constant supply voltage, preferably between +20 V and +60 V; second constant supply voltage, preferably between +10 V and +15 V; third constant supply voltage, preferably between +3 V and +5 V; Signal line for a one-sided serial Transmitting an input signal to the circuit (21), preferably between 0 V and 5 V; Signal line for one-sided serial transmission of a

Output signal from the circuit (21), preferably between 0V and 5V;

Signal line for a two-sided serial signal transmission, preferably between -10 V and +15 V; Ground connection.

A combination according to any one of claims 15-26, wherein the congruence map (91, 92, 93, 95) is a rotation, preferably 180 °, and / or a translation (94, 96).

Combination according to claim 27, wherein the releasable electrical connection is a plug connection with 16 contact elements (8), which are arranged in two rows of eight equidistant contact elements (8). 29. A method for designing a combination of an electrical circuit (21) and a multi-core electrical line (4), which combination a releasable electrical connection of a first connecting part (3) with a plurality

Contact elements (8) and a second connecting part (6) with several

Includes contact elements (8), wherein

the contact elements (8) of the two connecting parts (3, 6) are arranged such that they diverge in at least two different ways, separated by at least one congruent image (91-96) of one of the two connecting parts (3, 6) which is different from the identical image emerge, are interconnectable, characterized

in that the contact elements (8) of the first connection part (3) and / or the

Contact elements (8) of the second connecting part (6) are occupied such that in the at least one congruent mapping (91-96) only electrically compatible contact elements (8) are mapped to each other.