EP0581399A1 - Signaling system - Google Patents

Signaling system Download PDF

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Publication number
EP0581399A1
EP0581399A1 EP93250172A EP93250172A EP0581399A1 EP 0581399 A1 EP0581399 A1 EP 0581399A1 EP 93250172 A EP93250172 A EP 93250172A EP 93250172 A EP93250172 A EP 93250172A EP 0581399 A1 EP0581399 A1 EP 0581399A1
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Prior art keywords
detector
voltage
path
signaling
optocoupler
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EP93250172A
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German (de)
French (fr)
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EP0581399B1 (en
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Thomas Dipl.-Ing. Meier
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Siemens AG
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Siemens AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
    • B61L1/20—Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning

Definitions

  • the invention relates to a reporting system.
  • two identical detector elements that are to be supplied with electricity are often used in alarm systems.
  • these are e.g. Wheel sensors.
  • the messages provided by such sensors are important for operational safety, the correct electrical supply to these detectors must also be monitored.
  • the failure of the supply voltage of a detector could be recognized immediately if the detector in question supplies a continuous signal, that is to say works according to the open-circuit principle.
  • many sensors only deliver signal signals in certain operating states, so that the absence of signal signals cannot be used to conclude that a voltage failure may have occurred.
  • the invention is based on the object of designing a signaling system in which a multi-channel voltage supply is provided for the detector elements in such a way that an active fault report in the event of a failure of one of the supply voltages is possible with the least possible technical outlay.
  • a reporting system that solves this problem is described by claim 1.
  • the signaling devices which are present anyway are additionally used for reporting the failure of one of the supply voltages. So it is needed in everyone Supply circuit to be arranged only a monitoring element detecting a power failure.
  • a notification system corresponding to claims 1, 2 or 3 is particularly indicated when it comes to track systems and the detector elements are wheel sensors which are fed via two electrically isolated secondary windings of a transformer. Using such wheel sensors, the occupancy status of track sections is checked indirectly, so that it is necessary for safety reasons to immediately detect the failure of the supply voltage of one of the sensors.
  • a first detector element 2 is connected to the connection terminal 1 of a first voltage source U1.
  • a second detector element 4 is connected to the connection terminal 3 of a second voltage source U2.
  • the signal signals emitted by the detector elements 2 and 4 are fed to a first and a second signaling device 5 and 6, respectively.
  • the received signal signals are sent either directly or after appropriate preparation or processing in the signaling device 5 or 6 via its outputs 7 or 8 to a higher-level detection point, e.g. forwarded to an interlocking.
  • the diode path 9 of a first optocoupler 10 is also connected to the connection terminal 1 of the first voltage source U1.
  • the switching path 11 of this optocoupler 10 lies in a signal line 12 leading from the connecting terminal 3 of the second voltage source U2 to the first signaling device 5.
  • the diode path 13 of a second optocoupler 14 is connected in an analogous manner to the connecting terminal 3 of the second voltage source U2. Its switching path 15 lies in a signal line 16 leading from the connection terminal 1 of the first voltage source U1 to the second signaling device 6.
  • the optocoupler 10 or 14 connected to the corresponding voltage source no longer receives any voltage, so that its switching path 11 or 15 is closed.
  • the signal present at the corresponding input of the relevant signaling device 5 or 6 thus goes out. Due to the disappearance of this signal, the relevant signaling device 5 or 6 gives at one of the outputs 7 or 8 a corresponding message to the higher-level detection point so that the failure of one of the voltage sources U1 or U2 is immediately recognized and appropriate measures can be initiated to restore the correct voltage supply.
  • FIG. 2 shows a signaling system which, in addition to the supply voltages U1 and U2 for the detector elements 2 and 4, also has a separate signaling voltage U3.
  • the optocouplers 10 and 14 connected to the respective supply voltage U1 or U2 with their diode path 9 or 13 are each assigned a further optocoupler 19 or 22.
  • the switching path 11 or 15 of the optocoupler 10 or 14 connected to the supply voltage U1 or U2 is connected in parallel with the diode path 18 or 21 of the associated further optocoupler 19 or 22 to the other supply voltage U2 or U1 .
  • the switching path 20 or 23 of the further optocoupler 19 or 22 lies in the signal line 12 or 16 leading from the connecting terminal 17 of the signaling voltage U3 to a signal input of the relevant signaling device 5 or 6.
  • the signaling voltage U3 also serves as a supply voltage for the signaling devices 5 and 6.
  • This circuit variant works as follows: If one of the supply voltages U1 or U2 fails, the optocoupler 10 or 14 connected to the corresponding supply voltages U1 or U2 no longer receives any voltage, so that its switching path 11 or 15 is closed. As a result, the previously via the switching path 11 or 15 short-circuited diode path 18 or 21 of the further optocoupler 19 or 22 is energized and its switching path 20 or 23 is activated.
  • the notification device 5 or 6 thus receives a notification signal via the notification line 12 or 16. On the basis of this message signal, the relevant message device 5 or 6 then forwards a corresponding message to the higher-level detection point.

Abstract

The invention relates to a signalling system which exhibits at least two separately arranged detector elements (2 and 4, respectively) which are in each case fed by a separate voltage source (U1 and U2, respectively) and which output indicating signals to a signalling device (5 and 6, respectively) allocated to each detector element (2 and 4, respectively), in which signalling system a monitoring element (10, 19 and 14, 22, respectively) is also allocated to the supply system of each detector element (2 and 4, respectively), which monitoring element, in the event of a voltage failure in the corresponding supply system, outputs an indicating signal to the signalling device (5 and 6, respectively) allocated to the relevant detector element (2 and 4, respectively) in dependence on the supply voltage of the other detector element (4 and 2, respectively). This makes it possible to monitor the failure of a voltage source. <IMAGE>

Description

Die Erfindung betrifft ein Meldesystem.The invention relates to a reporting system.

Bei Meldesystemen werden aus bestimmten Gründen häufig Zwei gleichartige, elektrisch zu versorgende Detektorelemente eingesetzt. Bei Gleisanlagen sind dies z.B. Radsensoren. Insbesondere wenn die von solchen Sensoren gelieferten Meldungen für die Betriebssicherheit wichtig sind, muß auch die ordnungsgemäße elektrische Versorgung dieser Detektoren überwacht werden. Der Ausfall der Versorgungsspannung eines Detektors könnte sofort erkannt werden, wenn der betreffende Detektor ein Dauermeldesignal liefert, also beispielsweise nach dem Arbeitsstromprinzip arbeitet. Viele Sensoren liefern jedoch nur bei bestimmten Betriebszuständen Meldesignale, so daß aus dem Ausbleiben von Meldesignalen nicht auf einen evtl. eingetretenen Spannungsausfall geschlossen werden kann.For certain reasons, two identical detector elements that are to be supplied with electricity are often used in alarm systems. In the case of track systems, these are e.g. Wheel sensors. In particular, if the messages provided by such sensors are important for operational safety, the correct electrical supply to these detectors must also be monitored. The failure of the supply voltage of a detector could be recognized immediately if the detector in question supplies a continuous signal, that is to say works according to the open-circuit principle. However, many sensors only deliver signal signals in certain operating states, so that the absence of signal signals cannot be used to conclude that a voltage failure may have occurred.

Der Erfindung liegt die Aufgabe zugrunde, ein Melde-System, bei dem eine mehrkanalige Spannungsversorgung für die Detektorelemente vorgesehen ist, so auszubilden, daß eine aktive Störungsmeldung beim Ausfall einer der Versorgungsspannungen mit möglichst geringem technischen Aufwand möglich ist.The invention is based on the object of designing a signaling system in which a multi-channel voltage supply is provided for the detector elements in such a way that an active fault report in the event of a failure of one of the supply voltages is possible with the least possible technical outlay.

Eine diese Aufgabe lösendes Meldesystem wird durch den Patentanspruch 1 beschrieben. Bei diesem Meldesystem werden somit die ohnehin vorhandenen Meldeeinrichtungen zusätzlich noch für eine Meldung des Ausfalles einer der Versorgungsspannungen genutzt. Es braucht somit in jedem Versorgungskreis nur ein einen Spannungsausfall erfassendes Überwachungsglied angeordnet zu werden.A reporting system that solves this problem is described by claim 1. With this signaling system, the signaling devices which are present anyway are additionally used for reporting the failure of one of the supply voltages. So it is needed in everyone Supply circuit to be arranged only a monitoring element detecting a power failure.

Ein äußerst geringer technischer Aufwand ergibt sich bei einem gemäß dem Anspruch 2 ausgestalteten Meldesystem. Ist zusätzlich zu den Versorgungsspannungen der Detektorelemente noch eine gesonderte Meldespannung vorhanden, dann ist es vorteilhaft, das Meldesystem entsprechend den Merkmalen des Anspruchs 3 auszuführen.An extremely low technical outlay arises in the case of a notification system designed according to claim 2. If, in addition to the supply voltages of the detector elements, there is a separate signaling voltage, it is advantageous to design the signaling system in accordance with the features of claim 3.

Aus sicherheitsrelevanten Gründen ist der Einsatz eines den Ansprüchen 1,2 oder 3 entsprechenden Meldesystems besonders dann angezeigt, wenn es sich um Gleisanlagen handelt und die Detektorelemente Radsensoren sind, die über zwei galvanisch getrennte Sekundärwicklungen eines Transformators gespeist werden. Mittels solcher Radsensoren wird mittelbar der Belegungszustand von Gleisabschnitten überprüft, so daß es aus Sicherheitsgründen notwendig ist, den Ausfall der Versorgungsspannung eines der Sensoren sofort zu erfassen.For safety-related reasons, the use of a notification system corresponding to claims 1, 2 or 3 is particularly indicated when it comes to track systems and the detector elements are wheel sensors which are fed via two electrically isolated secondary windings of a transformer. Using such wheel sensors, the occupancy status of track sections is checked indirectly, so that it is necessary for safety reasons to immediately detect the failure of the supply voltage of one of the sensors.

Es ist ferner zweckmäßig, die Spannungsausfallmeldung eines Überwachungsgliedes potentialmäßig von den übrigen der der betreffenden Meldeeinrichtung zugeführten Meldungen zu trennen. Eine solche Potentialtrennung ist besonders einfach mittels Optokoppler möglich.It is also expedient to potentially separate the voltage failure message of a monitoring element from the rest of the messages fed to the relevant reporting device. Such isolation is particularly easy using an optocoupler.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird die Erfindung nachfolgend näher beschrieben. Es zeigt:

FIG 1
ein Schaltungsbeispiel eines Meldesystems,
FIG 2
ein Schaltungsbeispiel eines Meldesystems mit einer gesonderten Meldespannung.
The invention is described in more detail below on the basis of an exemplary embodiment shown in the drawing. It shows:
FIG. 1
a circuit example of a reporting system,
FIG 2
a circuit example of a signaling system with a separate signaling voltage.

An die Anschlußklemme 1 einer ersten Spannungsquelle U1 ist ein erstes Detektorelement 2 angeschlossen. In der gleichen Weise liegt an der Anschlußklemme 3 einer zweiten Spannungsquelle U2 ein zweites Detektorelement 4. Die von den Detektorelementen 2 und 4 abgegebenen Meldesignale werden jeweils einer ersten bzw. zweiten Meldeeinrichtung 5 bzw.6 zugeführt. Die eingegangenen Meldesignale werden entweder direkt oder nach entsprechender Aufbereitung bzw. Bearbeitung in der Meldeeinrichtung 5 bzw.6 über deren Ausgänge 7 bzw.8 an eine übergeordnete Erfassungsstelle, z.B. an ein Stellwerk weitergeleitet.A first detector element 2 is connected to the connection terminal 1 of a first voltage source U1. In the same way, a second detector element 4 is connected to the connection terminal 3 of a second voltage source U2. The signal signals emitted by the detector elements 2 and 4 are fed to a first and a second signaling device 5 and 6, respectively. The received signal signals are sent either directly or after appropriate preparation or processing in the signaling device 5 or 6 via its outputs 7 or 8 to a higher-level detection point, e.g. forwarded to an interlocking.

Mit der Anschlußklemme 1 der ersten Spannungsquelle U1 ist ferner die die Dioden-Strecke 9 eines ersten Optokopplers 10 verbunden. Die Schaltstrecke 11 dieses Optokopplers 10 liegt in einer von der Anschlußklemme 3 der zweiten Spannungsquelle U2 zu der ersten Meldeeinrichtung 5 führenden Meldeleitung 12.The diode path 9 of a first optocoupler 10 is also connected to the connection terminal 1 of the first voltage source U1. The switching path 11 of this optocoupler 10 lies in a signal line 12 leading from the connecting terminal 3 of the second voltage source U2 to the first signaling device 5.

In analoger Weise ist mit der Anschlußklemme 3 der zweiten Spannungsquelle U2 die Dioden-Strecke 13 eines zweiten Optokopplers 14 verbunden. Dessen Schaltstrecke 15 liegt in einer von der Anschlußklemme 1 der ersten Spannungsquelle U1 zu der zweiten Meldeeinrichtung 6 führenden Meldeleitung 16.The diode path 13 of a second optocoupler 14 is connected in an analogous manner to the connecting terminal 3 of the second voltage source U2. Its switching path 15 lies in a signal line 16 leading from the connection terminal 1 of the first voltage source U1 to the second signaling device 6.

Fällt eine der Spannungsquellen U1 oder U2 aus, so erhält der an der entsprechenden Spannungsquelle liegende Optokoppler 10 bzw.14 keine Spannung mehr, so daß seine Schaltstrecke 11 bzw.15 zugesteuert wird. Damit erlischt das an dem entsprechenden Eingang der betreffenden Meldeeinrichtung 5 bzw.6 anstehende Meldesignal. Aufgrund des Verschwindens dieses Meldesignales gibt die betreffende Meldeeinrichtung 5 bzw.6 an einem der Ausgänge 7 bzw.8 eine entsprechende Meldung an die übergeordnete Erfassungsstelle, so daß der Ausfall einer der Spannungsquellen U1 bzw.U2 sofort erkannt wird und entsprechende Maßnahmen zur Wiederherstellung der ordnungsgemäßen Spannungsversorgung eingeleitet werden können.If one of the voltage sources U1 or U2 fails, the optocoupler 10 or 14 connected to the corresponding voltage source no longer receives any voltage, so that its switching path 11 or 15 is closed. The signal present at the corresponding input of the relevant signaling device 5 or 6 thus goes out. Due to the disappearance of this signal, the relevant signaling device 5 or 6 gives at one of the outputs 7 or 8 a corresponding message to the higher-level detection point so that the failure of one of the voltage sources U1 or U2 is immediately recognized and appropriate measures can be initiated to restore the correct voltage supply.

Die in FIG 2 dargestellte Ausführungsvariante zeigt ein Meldesystem, das zusätzlich zu den Versorgungsspannungen U1 und U2 für die Detektorelemente 2 und 4 noch eine gesonderte Meldespannung U3 aufweist. Bei dieser Variante ist den mit ihrer Dioden-Strecke 9 bzw.13 an die jeweilige Versorgungsspannung U1 bzw.U2 angeschlossenen Optokopplern 10 und 14 jeweils noch ein weiterer Optokoppler 19 bzw.22 zugeordnet. Die Schaltstrecke 11 bzw.15 des an der Versorgungsspannung U1 bzw.U2 liegenden Optokopplers 10 bzw.14 ist jeweils mit der Dioden-Strecke 18 bzw.21 des zugeordneten weiteren Optokopplers 19 bzw.22 parallel an die jeweils andere Versorgungsspannung U2 bzw.U1 angeschlossen.The embodiment variant shown in FIG. 2 shows a signaling system which, in addition to the supply voltages U1 and U2 for the detector elements 2 and 4, also has a separate signaling voltage U3. In this variant, the optocouplers 10 and 14 connected to the respective supply voltage U1 or U2 with their diode path 9 or 13 are each assigned a further optocoupler 19 or 22. The switching path 11 or 15 of the optocoupler 10 or 14 connected to the supply voltage U1 or U2 is connected in parallel with the diode path 18 or 21 of the associated further optocoupler 19 or 22 to the other supply voltage U2 or U1 .

Die Schaltstrecke 20 bzw.23 des weiteren Optokopplers 19 bzw.22 liegt in der von der Anschlußklemme 17 der Meldespannung U3 zu einem Meldeeingang der betreffenden Meldeeinrichtung 5 bzw.6 führenden Meldeleitung 12 bzw.16. Die Meldespannung U3 dient ferner gleichzeitig als Versorgungsspannung für die Meldeeinrichtungen 5 und 6.The switching path 20 or 23 of the further optocoupler 19 or 22 lies in the signal line 12 or 16 leading from the connecting terminal 17 of the signaling voltage U3 to a signal input of the relevant signaling device 5 or 6. The signaling voltage U3 also serves as a supply voltage for the signaling devices 5 and 6.

Diese Schaltungsvariante arbeitet wie folgt:
Fällt eine der Versorgungsspannungen U1 oder U2 aus, so erhält der an der entsprechenden Versorgungsspannungen U1 bzw.U2 liegende Optokoppler 10 bzw.14 keine Spannung mehr, so daß seine Schaltstrecke 11 bzw.15 zugesteuert wird. Hierdurch wird die zuvor über die Schaltstrecke 11 bzw.15 kurzgeschlossene Dioden-Strecke 18 bzw.21 des weiteren Optokopplers 19 bzw.22 bestromt und seine Schaltstrecke 20 bzw.23 durchgesteuert. Die Meldeeinrichtung 5 bzw.6 erhält damit über die Meldeleitung 12 bzw.16 ein Meldesignal. Aufgrund dieses Meldesignales gibt dann die betreffende Meldeeinrichtung 5 bzw.6 eine entsprechende Meldung an die übergeordnete Erfassungsstelle weiter.This circuit variant works as follows:
If one of the supply voltages U1 or U2 fails, the optocoupler 10 or 14 connected to the corresponding supply voltages U1 or U2 no longer receives any voltage, so that its switching path 11 or 15 is closed. As a result, the previously via the switching path 11 or 15 short-circuited diode path 18 or 21 of the further optocoupler 19 or 22 is energized and its switching path 20 or 23 is activated. The notification device 5 or 6 thus receives a notification signal via the notification line 12 or 16. On the basis of this message signal, the relevant message device 5 or 6 then forwards a corresponding message to the higher-level detection point.

Im Unterschied zu der Schaltung nach FIG 1, bei der durch das Verschwinden eines Meldesignals am Eingang der Meldeeinrichtung 5 bzw.6 eine Meldung ausgelöst wird, geschieht dies bei der Schaltungsvarianten nach FIG 2 beim Auftreten eines Meldesignales der Meldeeinrichtung 5 bzw.6.In contrast to the circuit according to FIG. 1, in which a message is triggered by the disappearance of a message signal at the input of the message device 5 or 6, this occurs in the circuit variants according to FIG. 2 when a message signal of the message device 5 or 6 occurs.

Claims (6)

Meldesystem, das mindestens zwei getrennt angeordnete Detektorelemente (2 bzw.4) aufweist, die jeweils von einer gesonderten Spannungsquelle (U1 bzw.U2) gespeist werden und die Meldesignale an eine jedem Detektorelement (2 bzw.4) zugeordnete Meldeeinrichtung (5 bzw.6) abgeben, bei welchem Meldesystem ferner der Versorgungsstrecke jedes Detektorelementes (2 bzw.4) ein Überwachungsglied (10,19 bzw. 14,22) Zugeordnet ist, das bei Spannungsausfall in der entsprechenden Versorgungsstrecke in Abhängigkeit von der Versorgungsspannung des anderen Detektorelementes (4 bzw.2) ein Meldesignal an die dem betreffenden Detektorelement (2 bzw.4) zugeordnete Meldeeinrichtung (5 bzw.6) abgibt.Signaling system which has at least two separately arranged detector elements (2 or 4), each of which is fed by a separate voltage source (U1 or U2) and the signal signals to a signaling device (5 or 6) assigned to each detector element (2 or 4) ) in which signaling system a monitoring element (10, 19 or 14, 22) is also assigned to the supply path of each detector element (2 or 4), which in the event of a power failure in the corresponding supply path depends on the supply voltage of the other detector element (4 or .2) outputs a signal to the signaling device (5 or 6) assigned to the detector element (2 or 4) concerned. Meldesystem nach Anspruch 1,
dadurch gekennzeichnet,
daß das Überwachungsglied ein Optokoppler (10 bzw.14) ist, dessen die Dioden-Strecke (9 bzw.13) an die Versorgungsstrecke des jeweiligen Detektorelementes (2 bzw.4) und dessen Schaltstrecke (11 bzw.15) an die Versorgungsstrecke des jeweils anderen Detektorelementes (4 bzw.2) angeschlossen ist.Notification system according to claim 1,
characterized by
that the monitoring element is an optocoupler (10 or 14), the diode path (9 or 13) to the supply path of the respective detector element (2 or 4) and the switching path (11 or 15) to the supply path of the respective other detector element (4 or 2) is connected. Meldesystem nach Anspruch 1, mit einer gegenüber den Spannungsquellen für die Detektorelemente zusätzlichen Meldespannungsquelle,
dadurch gekennzeichnet,
daß das Überwachungsglied aus jeweils zwei Optokopplern (10 und 19 bzw. 14 und 22) besteht, wobei die Dioden-Strecke (9 bzw.13) des einen Optokopplers (10 bzw.14) des Überwachungsgliedes an die Versorgungsstrecke des jeweiligen Detektorelementes (2 bzw.4) und die Schaltstrecke des betreffenden einen Optokopplers (10 bzw.14) parallel zu der Dioden-Strecke (18 bzw.21) des anderen Optokopplers (19 bzw.22) des Überwachungsgliedes an die Versorgungsstrecke des anderen Detektorelementes (4 bzw.2) angeschlossen ist und daß durch die Schaltstrecke (20 bzw.23) des anderen Optokopplers (19 bzw.22) des Überwachungsgliedes die Meldespannung (U3) an einen Meldeeingang der dem betreffenden Detektorelement (2 bzw.4) zugeordneten Meldeeinrichtung (5 bzw.6) schaltbar ist.Signaling system according to Claim 1, with an additional signaling voltage source compared to the voltage sources for the detector elements,
characterized by
that the monitoring element consists of two optocouplers (10 and 19 or 14 and 22), the diode path (9 or 13) of the one optocoupler (10 or 14) of the monitoring element to the supply path of the respective detector element (2 or .4) and the switching path of the relevant one optocoupler (10 or 14) parallel to the diode path (18 or 21) of the other optocoupler (19 or 22) of the monitoring element is connected to the supply path of the other detector element (4 or 2) and that by the switching path (20 or 23) of the other optocoupler (19 or 22) of the monitoring element the signal voltage (U3) to a signal input of the detector device (2 or 4) associated with the relevant detector device (5 or 6) can be switched. Meldesystem nach Anspruch 1,2 oder 3, für Gleisanlagen,
dadurch gekennzeichnet,
daß die beiden Detektorelemente (2 und 4) Radsensoren sind, die über zwei galvanisch getrennte Sekundärwicklungen eines Transformators gespeist werden.Reporting system according to claim 1, 2 or 3, for track systems,
characterized by
that the two detector elements (2 and 4) are wheel sensors which are fed via two galvanically isolated secondary windings of a transformer. Meldesystem nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet,
daß die Spannungsausfallmeldung des Überwachungsgliedes in der Meldeeinrichtung (5 bzw.6) von den übrigen Meldungen potentialmäßig getrennt ist.Reporting system according to one or more of the preceding claims, characterized in that
that the voltage failure message of the monitoring element in the signaling device (5 or 6) is electrically isolated from the other messages. Meldesystem nach Anspruch 5,
dadurch gekennzeichnet,
daß die Potentialtrennung mittels Optokoppler erfolgt.Notification system according to claim 5,
characterized by
that the potential separation takes place by means of optocouplers.
EP93250172A 1992-07-01 1993-06-17 Signaling system Expired - Lifetime EP0581399B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4221779A DE4221779A1 (en) 1992-07-01 1992-07-01 Notification system
DE4221779 1992-07-01

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EP0581399A1 true EP0581399A1 (en) 1994-02-02
EP0581399B1 EP0581399B1 (en) 1995-10-25

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AT (1) ATE129586T1 (en)
DE (2) DE4221779A1 (en)
DK (1) DK0581399T3 (en)
ES (1) ES2080584T3 (en)
FI (1) FI108016B (en)

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Publication number Priority date Publication date Assignee Title
WO2004006404A2 (en) * 2002-07-02 2004-01-15 Siemens Ag Circuit for monitoring currents in a plurality of branch circuits of a network

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DE3636104A1 (en) * 1986-10-23 1988-04-28 Siemens Ag Electronic relay
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DE4132388A1 (en) * 1991-09-26 1993-04-01 Siemens Ag Digital 2 from 3 selection circuit - has four opto-couplers, with two at data channel with their transmit diodes in series

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU26738A (en) * 1938-01-22 1939-01-26 Vii. nam Smith Edward Improvements in breaking-down saws
US4247790A (en) * 1976-01-22 1981-01-27 Westinghouse Electric Corp. Failsafe train vehicle control signal threshold detector apparatus
DE3636104A1 (en) * 1986-10-23 1988-04-28 Siemens Ag Electronic relay
DE3939408A1 (en) * 1989-11-29 1991-06-06 Ant Nachrichtentech Working voltage monitor for selector banks in telephone exchange - assigns comparator to each voltage with outputs switched together for unit able to produce alarm signal
US4980791A (en) * 1990-02-05 1990-12-25 Motorola, Inc. Universal power supply monitor circuit
DE4132388A1 (en) * 1991-09-26 1993-04-01 Siemens Ag Digital 2 from 3 selection circuit - has four opto-couplers, with two at data channel with their transmit diodes in series

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004006404A2 (en) * 2002-07-02 2004-01-15 Siemens Ag Circuit for monitoring currents in a plurality of branch circuits of a network
WO2004006404A3 (en) * 2002-07-02 2004-05-21 Siemens Ag Circuit for monitoring currents in a plurality of branch circuits of a network

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FI933039A (en) 1994-01-02
DE4221779A1 (en) 1994-01-05
FI108016B (en) 2001-11-15
ATE129586T1 (en) 1995-11-15
ES2080584T3 (en) 1996-02-01
DK0581399T3 (en) 1996-03-04
DE59300813D1 (en) 1995-11-30
FI933039A0 (en) 1993-07-01
EP0581399B1 (en) 1995-10-25

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