DE2118474B2

DE2118474B2 - Electrical circuit arrangement for successive switching on of control circuits, in particular for specifying setpoints

Info

Publication number: DE2118474B2
Application number: DE19712118474
Authority: DE
Inventors: Fritz χ 7113 Mark kleeberg Kastner Hans Lmcke Wolfram χ 7022 Leipzig Muller
Original assignee: VEB Kombinat ORSTA Hydraulik, x7010 Leipzig
Priority date: 1970-10-14
Filing date: 1971-04-16
Publication date: 1972-11-16
Also published as: CS161917B2; DD85110B1; DE2118474A1

Description

3 43 4

an den Verbindungspunkten zwischen Hilfskontakt Widerstände All und i?21 sind so bemessen, daßat the connection points between auxiliary contact resistors All and i? 21 are dimensioned so that

dl; dl; d3... und erstem ohmschen Widerstand der über den ohmschen WiderstandR21 und das dl; dl; d3 ... and the first ohmic resistance of the ohmic resistance R 21 and the

All; R12; i?13... bzw. Schalter 61; 62; 63;... Gleichstromrelais dl fließende Teilstrom dem Halte-Alles; R12; i? 13 ... or switch 61; 62; 63; ... DC relay dl flowing partial current to the holding

und Relaisspule miteinander verbunden. Die Schalter strom des Gleichstromrelais dl entspricht. Über denand relay coil connected to each other. The switch current of the DC relay dl corresponds to. On the

61; 62; 6 3..., beispielsweise ein Taster, und der 5 Hauptkontakt des Gleichstromrelais d 1 im Arbeits-61; 62; 6 3 ..., for example a button, and the 5 main contact of the DC relay d 1 in the working

Hilfskontakt dl; dl; t/3... des Gleichstromrelais Stromkreis liegt der durch das zugehörige Potentio-Auxiliary contact dl; dl; t / 3 ... of the DC relay circuit is determined by the associated potentiometer

dl;d2;d3;... liegen an dem gleichen Pol der meter eingestellte SollwertSW1 am SignalausgangA dl; d2; d3; ... are on the same pole as the setpoint SW1 set by the meter at signal output A.

Gleichstromquelle an. Fi g. 2 zeigt den Arbeitsstrom- an.DC power source. Fi g. 2 shows the working current.

kreis, in dem beispielsweise die Sollwerte 5Wl; SW2; Wird ein anderer Taster, beispielsweise 63, be-SW3;... speichernde Potentiometer parallel angeord- io tätigt, um das Gleichstromrelais /23 und damit den net sind. Der Schleifer jedes einzelnen Potentiometers Sollwert SW 3 einzuschalten, bewirkt der im Stromist über den Hauptkontakt des zugehörigen Gleich- pfad 6 fließende Strom durch die weitere Stromteistromrelais dl; d2; d3;... mit dem Signalausgang A lung, daß der Haltestrom des angezogenen Gleichverbunden. Stromrelais dl unterschritten wird, da aus der Gleich-Bei Betätigung beispielsweise des zum Gleichstrom- 15 stromquelle nur ein begrenzter, konstanter Strom zur relais dl gehörigen Tasters 61 fließt Strom im Strom- Verfügung steht. Dadurch fällt das Gleichstromrelais pfad 2, dadurch zieht Gleichstromrelais dl an. In- dl ab, und das Gleichstromrelais d3 zieht an. Am folge Stromteilung fließt über die parallel zum Gleich- Signalausgang A liegt dann der Sollwert SW 3 an.
stromrelais d 1 liegenden ohmschen Widerstände R 21 Durch die erfindungsgemäße elektrische Schal- und RIl ein Teilstrom. Nach öffnen des Tasters 61 ao tungsanordnung ist gewährleistet, daß höchstens ein fließt über den Hilfskontakt des Gleichstromrelais dl Gleichstromrelais angezogen ist und damit nur ein im Strompfad 1 ein Strom, der in zwei über den Sollwert am Signalausgang A anliegen kann. Ein geohmschen Widerstand RIl sowie über den ohm- gebenenfalls defektes Gleichstromrelais ist ohne sehen Widerstand R21 und das Gleichstromrelais dl Schwierigkeiten zu finden, da es beim Betätigen des fließende Teilströme zerlegt wird. Die ohmschen »5 zugehörigen Schalters nicht anzieht.circle in which, for example, the setpoints 5Wl; SW2; If another button, for example 63, is activated SW 3; ... storing potentiometer in parallel to activate the DC relay / 23 and thus the net. Switching on the wiper of each individual potentiometer setpoint SW 3 causes the current flowing in the current via the main contact of the associated DC path 6 through the additional current relay dl; d2; d 3; ... with the signal output A treatment that the holding current of the attracted DC connected. Current relay dl is undershot, because from the direct-When actuating, for example, the direct current 15 current source only a limited, constant current to the relay dl push button 61 flows current in the current is available. This causes the DC relay path 2 to drop and the DC relay dl picks up. In- dl from, and the DC relay d 3 picks up. At the following current division, the setpoint value SW 3 then flows through the parallel to the DC signal output A.
current relay d 1 lying ohmic resistors R 21 by the inventive electrical switching and RIl a partial current. After opening the button 61 ao processing arrangement it is ensured that at most one flows through the auxiliary contact of the DC relay dl DC relay is attracted and thus only one in current path 1 a current that can be present in two over the setpoint at signal output A. A geohmschen resistance RIl as well as via the ohmic possibly defective DC relay can be found without seeing resistor R 21 and the DC relay dl difficulties, since it is broken down when the flowing partial currents are actuated. The ohmic »5 associated switch does not attract.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 21 2

excitation of the relay required control current from a

Claim: AC voltage source is supplied, is in it

Use of relays with short response times, such as

Electrical circuit arrangement for one-on-one, for example protective gas relay, not possible. A subsequent switching on of control circuits, 5 a further disadvantage of the known arrangement results in particular for the specification of setpoints, with the result that in the resistance of any number of any number on a common line the auxiliary contacts of all relays of the relay DC source are connected in parallel in a parallel-connected DC chain Row. As the number of current relays with at least two contacts increases, the re-relay coils connected in parallel to the voltage source are each controlled by one in their current relay, because a switch located on the path, for example a defective auxiliary contact, can expose the entire limit switch or a button to effect the equal circuit arrangement. The more relays the power source can be switched, in which there is only one relay chain, the more difficult it is to switch on the DC relay and the rest of the determination of the cause of the fault, since each relay is switched on and a resistance zone has to be examined. Furthermore, the arrangement of ohmic resistors must be in the known circuit arrangement, if it is provided that when a white button is pressed instead of the operating switch, the switch is below the holding switch, with a third relay contact for self-current and thus the drop the one must be provided equalization, ie a total of a current relay and subsequent tightening of the further DC make contact assigned to the NO contact and an NC contact in the control circuit and a further switch in the working circuit are required,
current relay causes, thereby marked- The purpose of the invention is to improve the

draws that the resistor arrangement from known circuit arrangement with the aim of verje a first ohmic resistance (R 11; R 12; reducing the effort and increasing the BeZi 13; ...) and a second ohmic resistance. In addition, the invention aims, stood (R 21; R 22; R 23; ... ), That the first that through their application there is the possibility of ohmic resistance (R 11; R 12; .R13; ...) in also use relays with short response times, every DC relay (dl; d2; d3; ...) trains- The invention is therefore based on the object

arranged, the current paths (2; 4; 6; ...) for a simple and reliable electrical circuit relay coils connected in parallel additional arrangement for successive switching on current paths (1; 3; 5; ...) arranged and of control circuits, in particular to provide an auxiliary contact (dl; d2; d3; ... ) of the train setpoints, which contains a constant current source belonging direct current relay (dl; d2; d3 ...) to the and with the appropriate opposite pole the direct current source like the configuration of a resistor arrangement of ohmic switches (oil; b2; b3; ...) can be applied and that 35 resistances are achieved so that, as a result of the failure of the second ohmic resistor (R 21; R22; of a relay, no general malfunction occurs .
R23; ...) the two current paths (1; 2 or 3; 4) According to the invention, in a circuit arrangement

or 5; I / 2; 6; ...) intermediate to the connection points of the aforementioned type this object daschen d 1 voltage auxiliary contact (d3 ...) and dissolved by the first in that the resistance arrangement of each resistor (All; R12; / 213; ...) 40 a first ohmic resistance and a two- or switch (oil; 62; b3; ...) and relay coil th ohmic resistance consists that the first connects to each other. ohmic resistance in every DC relay increases

ordered additional current paths connected in parallel to the current paths for the relay coils.

45 assigns and from an auxiliary contact of the associated

DC relay can be applied to the same pole of the DC source as the switch and that

The invention relates to an electrical, the second ohmic resistor, the two current circuit arrangements for successive paths at the connection points between auxiliary switching on of Steuerkf iron, in particular for the 5 ° contact and first ohmic resistance or switching of setpoints, with a row connects any number of ter and relay coils with each other,
in parallel to a common direct current source. In the drawing contacts, the relay coils of which each of one in the voltage show Fig. 1 and 2 circuit diagrams,
switch located in its current path, for example 55. With a direct current source, as in FIG. 1 a limit switch or a button to which DC shown, a number of any number of parallel connected current sources can be switched, in each of which only one DC relay with two contacts dl; d2; DC relay switched on and the others switched off - d3; ... connected. To each DC relay dl; are connected and in which a resistor arrangement d2; d3 ... belongs to a switch oil; b2; b3. d2; d3; ... an undershooting of the holding current and thus the one current path 2; 4; 6; ... educates. An auxiliary contact drop of a DC relay and connect- dl; d2; d3; ... each individual DC relay dl; the tightening of the additional switch associated with d2; d3; ... forms together with a first ohmic additional DC relay. 65 see resistor RU; R 12; R 13; ... an additional circuit arrangement is in the borrowed current path 1; 3; 5; The two Stromdeutschen patent specification 965 253 described. Since with paths 1 and 1; 3 and 4; 5 and 6; ... are due to one of these circuit arrangements, however, the second ohmic resistance /? 21; R 22; R23; ...