JPS6326438B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centralized display/warning device that centrally displays and warns of failures or abnormal conditions at multiple locations.

FIG. 1 is an electrical wiring diagram showing a conventional centralized display alarm device. In Fig. 1, the display alarm device 1A
~1N are provided corresponding to the respective locations for displaying and warning failures or abnormal conditions, and are respectively the first and second relays 11 and 12 and their make contacts 11a1 to 11a3 and 12a1 to 12a.
4 and break contacts 11b1 to 11b2, 12
b1. Fault signal contacts 2A to 2N are provided corresponding to each alarm display location, and are closed in the event of a fault or abnormal state. The flicker relay 3 is energized by the output of the display/alarm devices 1A to 1N, and when energized, the flicker relay contact 3a is intermittently closed. The indicator lights 4A to 4N flash by the output of the display/alarm devices 1A to 1N when the fault signal contacts 2A to 2N are closed and by the intermittent closure of the flicker relay contact 3a. Alarm device 5 is display alarm device 1
It is energized by the outputs of A to 1N and generates an alarm. When the alarm stop switch 6 is opened, the blinking of the indicator lights 4A to 4N and the display alarm of the alarm device 5 are stopped. The indicator light test switch 7 tests the indicator lights 4A to 4N by opening it.

Next, this operation will be explained using FIG. 2. In normal conditions, not in a failure or abnormal state, the failure signal contact 2A is open, so the first relay 11
is deactivated. On the other hand, the second
The relay 12 is always energized and self-maintained by its make contact 12a2. In this state, if a failure or abnormality occurs at the location corresponding to the fault signal contact 2A at time t1 shown in FIG. _2a , the fault signal contact 2A is closed as shown at 2A in FIG. 2a. Therefore, the first relay 11 is energized, and the positive power supply (+) → make contact 1
2a1 → make contact 11a1 → first relay 11
→The first relay 11 is self-maintained by the closed circuit of the negative power supply (-). When the first relay 11 is energized, the positive power supply (+) → alarm stop switch 6 →
A closed circuit is formed from make contact 11a3 to make contact 12a4, flicker relay 3, alarm device 5, negative power supply, and the alarm device 5 generates an alarm as shown at 5 in FIG. 2a. Furthermore, since the flicker relay contact 3a is intermittently closed by the energization of the flicker relay 3, the positive power supply (+) → the flicker relay contact 3a → the make contact 12a3 → the make contact 11a2 → the indicator light 4A → the negative power supply (- ) is formed, and the indicator light 4A blinks as shown at 4A in FIG. 2a. In this state, even if the failure or abnormality is canceled at time t ₂ in FIG. 2a and the fault signal contact 2A is opened as shown in 2A in FIG. 2a, the first relay 11 is self-held. Therefore, the indicator light 4A and alarm 5 are set to 4A in Figure 2a.
And as shown in 5, the flashing and alarm continues to occur. Next, when the alarm stop switch 6 is pressed and opened at time _t3 in FIG. 2a, the second relay 12 is deenergized and its make contacts 12a1 to
12a4 is opened, the first relay 11 is deenergized, and its make contacts 11a1 to 11a3 are opened. Therefore, the indicator light 4A and the alarm 5 are deenergized at time _t3 , as shown at 4A, 5 in FIG. 2a.

Next, a case will be described in which the alarm stop switch 6 is pressed and opened in a state where the failure or abnormality has not disappeared. If a failure or abnormality occurs at time t ₁ in Figure 2b, the indicator light 4A is
And the alarm device 5 flashes and generates an alarm as shown at 4A and 5 in FIG. 2b. When the alarm stop switch 6 is pressed and opened at time _t2 in FIG. 2b when this failure or abnormality is occurring, the second relay 12 is deenergized and its make contacts 12a1 to 12a4 are opened. Open and close the break contact 12b1. On the other hand, failure signal contact 2
Since A remains closed as shown at 2A in FIG. 2b, the first relay 11 remains energized. Therefore, the flicker relay 3 and the alarm 5 are deenergized at time t2, as shown at ₅ in FIG. 2b, because the make contact 12a4 opens. On the other hand, the indicator light 4A is activated at time t ₂ as shown in 4A in FIG. From then on, it lights up continuously without blinking. Next, when the fault or abnormality disappears at time t3 in Fig. _2b , the fault signal contact 2A
To open as shown at 2A in Figure b, the first relay 11 is deenergized and opens its make contact 11a2. Accordingly, the indicator light 4A also goes out at time _t3 , as shown at 4A in FIG. 2b.

Next, when testing the indicator lights 4A to 4N, close the indicator light test switch 7, and the positive power supply (+) → indicator light test switch 7 → break contact 11b2 → indicator light 4A → negative power supply (-) A closed circuit is formed, and it can be confirmed that the indicator light 4A is lit. The same applies to the other indicator lights 4B to 4N.

In the conventional device configured as described above, the second relay 12 provided in each of the display/alarm devices 1A to 1N is self-held at all times, which has the disadvantage of high power consumption.

This invention was made in order to eliminate the drawbacks of the above-mentioned conventional ones. An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is an electrical wiring diagram showing an embodiment of the centralized display alarm device according to the present invention. In the figure, parts corresponding to those in FIG. 1 are given corresponding symbols. Third
In the figure, light emitting diodes 9A to 9N are connected to fault signal contacts 2A to 2N, respectively, and diodes 10A to 10A are connected to fault signal contacts 2A to 2N, respectively.
10N and are connected in series via resistors 13A to 13N. The reset relay 14 opens its break contact 14b when energized to cut off the power applied to the first relay 11 of the display/alarm device 1 via the fault signal contacts 2A to 2N.
The time-limited relay 15 is connected in parallel to the reset relay 14, and after being energized, the time-limited relay 15 is connected in parallel to the reset relay 14, and after being energized, it is set for a predetermined setting time
0.5 seconds) after which the time-limited make contact 1
5a. Self-holding relay 16
A series circuit of A to 16N and diodes 17A to 17N is connected in parallel to a series circuit of resistors 13A to 13N and light emitting diodes 9A to 9N via time-limited make contacts 15a, respectively. Further, one end of each of the self-holding relays 16A to 16N is connected to a series circuit of each make contact 16A1 to 16N1 and a diode 18A to 18N, and a display/alarm device 1.
The other ends of each of the self-holding relays 16A to 16N are connected to the negative power source (+) via the make contacts 11a4 of the first relay 11 in the self-holding relays 16A to 16N. -) is connected. Self-holding relay 16A
~16N respective break contacts 16A3~1
6N3 are connected between the fault signal contacts 2A-2N and the reset relay 14, respectively, and the diodes 19A-19N are connected between the fault signal contacts 2A-2N, respectively.
N and the break contact 14b.

Next, this operation will be explained using FIG. 4. now,
At the time t ₁ shown in FIG. 4a, the fault signal contact 2A
If a failure or abnormality occurs at the location corresponding to
A closes. Therefore, a closed circuit of positive power supply (+) → fault signal contact 2A → diode 10A → resistor 13A → light emitting diode 9A → negative power supply (-) is formed, and the light emitting diode 9A is connected as shown in 9A in FIG. 4a. It emits light to indicate that a failure or abnormality has occurred at the location corresponding to the failure signal contact 2A. On the other hand, a closed circuit of positive power supply (+) → failure signal contact 2A → break contact 16A3 = reset relay 14 time-limited relay 15 = negative power supply = - is formed, and the reset relay 14 is energized and its break contact 14b is opened. do. Therefore, at time t ₁ the first relay 11 of the display and warning device 1 is not energized. In addition, time-limited relay 15
is a predetermined setting time △t (0.1 to 0.5 seconds) after being energized.
After the lapse of time, it is energized and closes the time-limited make contact 15a, so the positive power supply (+) → failure signal contact 2A →
A closed circuit of diode 10A → self-holding relay 16a → diode 17A → time-limited make contact 15a → negative power supply (-) is formed, and self-holding relay 1
6A is energized and its make contacts 16A1, 16
A2 is closed and its break contact 16A3 is opened. When break contact 16A3 opens, reset relay 14 is deenergized and its break contact 1
4b, positive power supply (+) → failure signal contact 2A → diode 19A → break contact 14b
A closed circuit of →first relay 11 →negative power supply (-) is formed, and the first relay 11 is energized. 1st
When the relay 11 is energized, the indicator light 4 starts blinking with a delay of △t from the time t1 as shown in 4 of Fig. 4a in the same way as explained in Fig. ₁ , and the alarm is activated again. The device 5 also generates an alarm as shown at 5 in FIG. 4a. In this case, the self-holding relay 16A
is positive power supply (+) → make contact 11a4 in display/alarm device 1 → diode 18A → make contact 16
A1 → Self-holding relay 16A → Make contact 16A
2→A closed circuit of negative power supply (-) is formed and self-maintained. Next, at time t ₂ shown in Fig. 4 a, the failure or abnormal condition is released, and Fig. 4 a
Even if the fault signal contact 2A is opened as shown in 2A of FIG. 1, the first and second relays 11 and 12 are self-held as explained in FIG. It continues to flash and generate alarms as shown at 4 and 5 in Figure 4a. Next, when the alarm stop switch 6 is opened at time t3 shown in FIG. _4a , the indicator light 4 and alarm 5 are turned off as shown in 4 and 5 in FIG. 4a, as explained in FIG. Forced.

Next, a case will be described in which the alarm stop switch 6 is pressed and opened in a state where the failure or abnormality has not disappeared. If a failure or abnormality occurs at time _t1 in FIG. 4b, the indicator light 4 and alarm 5 flash and issue an alarm as shown at 4 and 5 in FIG. 4b in the same manner as described above. When the alarm switch 6 is opened at time _t2 shown in FIG. 4b, when this failure or abnormality is occurring, the first
Similarly to the time t ₂ of FIG. 2b explained in the figure, the indicator light 4 is lit continuously as shown at 4 in FIG. 4b, and the alarm 5 is turned on as shown at 5 in FIG. 4b. will be deactivated. Next, when the failure or abnormality disappears at time _t3 in FIG. 4b, the indicator light 4 also changes as shown in ₄ in FIG. 4b in the same manner as at time t3 in FIG. Lights out.

Next, a case will be described in which the failure signal contact 2B is closed while the failure signal contact 2A is closed. The operations at times t ₁ and t ₂ in FIG. 4c are the same as those at times t ₁ and t ₂ in FIG. 4b. now,
If a failure or abnormality occurs at the point corresponding to the fault signal contact 2B at time _t3 in FIG. 4c, the fault signal contact 2B is closed as shown at 2B in FIG. 4c. Therefore, positive power supply (+) → failure signal contact 2
A closed circuit of B → diode 10B → resistor 13B → light emitting diode 9B → negative power supply (-) is formed,
The light emitting diode 9B emits light as shown at 9B in FIG. 4c, indicating that a failure or abnormality has occurred at the location corresponding to the failure signal contact 2B. On the other hand, a closed circuit of positive power supply (+) → failure signal contact 2B → break contact 16B3 = reset relay 14 time-limited relay 15 = negative power supply = - is formed, the reset relay 14 is energized, and its break contact 14b is opened. . Therefore, at time _t3 in FIG. 4c, the display/warning device 1
The first relay 11 of is not energized. After the time-limited relay 15 is energized, a predetermined setting time △t (0.1~
After 0.5 seconds), it is energized and closes the time-limited make contact 15a, so the positive power supply (+) → failure signal contact 2B → diode 10B → self-holding relay 16
B→Diode 17B→Time-limited make contact 15a→
A closed circuit of the negative power supply (-) is formed, and the self-holding relay 16B is energized, and its make contact 16B
1, 16B2 is closed, and its break contact 16B
Open 3. When the break contact 16B3 opens, the reset relay 14 is deenergized and the break contact 14b is opened, so that the positive power supply (+) → failure signal contact 2B → diode 19B → break contact 14B → first relay 11 → negative power supply A (-) closed circuit is formed and the first relay 11 is energized. When the first relay 11 is energized, the indicator light 4 is activated at 4 in FIG.
As shown in Fig. _{4, the flashing starts after a delay of △t from time t3} , and the alarm 5 also generates an alarm as shown in Fig. 4c, 5. Also in this case, self-holding relay 1
6B is the positive power supply (+) → make contact 11a4 in the display/alarm device 1 → diode 18B → make contact 16B1 → self-holding relay 16B → make contact 1
A closed circuit of 6B2→negative power supply (-) is formed and self-maintained. Furthermore, since the reset relay 14 is connected in parallel to the light emitting diode 9A via the break contact 16B3 and the failure signal contacts 2A and 2B, the time Δt during which the break contact 16B3 is closed is the same as the light emitting diode 9A shown in FIG. The light goes out as shown at 9A in c. Next, at time _t4 in FIG. 4c, when the fault or abnormality at the location corresponding to the fault signal contact 2A is cleared, the fault signal contact 2A opens as shown at 2A in FIG. 5c. However, in this case, the light emitting diode 9A remains lit as described at time _t2 in FIG. 4a. Next _, when the alarm stop switch 6 is opened at time _t5 in FIG. The alarm 5 is turned off as shown at 9A in FIG. 4c, and the indicator light 4 is turned off as shown at _9A in FIG. It lights up continuously as shown in 4. Next, when the fault signal contact 2B opens at time _t6 in FIG. 5c, the indicator light 4 goes out as shown at ₄ in FIG. 4c, similar to time t3 in FIG. 4b.

Since the present invention is configured as described above and uses only the single display/warning device 1, only the second relay 12 is a fixed load during normal operation without failure or abnormality. Also, reset relay 14
The time-limited relay 15 serves as a load only momentarily when a failure occurs, and the self-holding relays 16A to 1
6N is a load only during the failure occurrence period.
Therefore, the fixed load can be regarded as almost zero.
Also, when comparing the number of relays used in the conventional device and the device of this invention, if the number of display items is n,
The conventional device requires 2n pieces, and the device of the present invention requires (4+n) pieces. Therefore, when n>4, the number of relays used in the device of this invention decreases, and this effect becomes more pronounced as the number of display items increases. In addition, the indicator light 4 is only one light, and the light-emitting diode 9A to 9N, which has low power consumption, is small, and has a long life, is used as an indicator to indicate the location of the failure.
Since it uses , it is possible to save energy in the device.

As described above, according to the present invention, the number of relays used is small, power consumption is reduced, and a compact and inexpensive device can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an electrical wiring diagram showing a conventional centralized display alarm device, FIG. 2 is an explanatory diagram of the operation of FIG. 1, FIG. 3 is an electrical wiring diagram showing a centralized display alarm device according to the present invention, and FIG. FIG. 4 is an explanatory diagram of the operation of FIG. 3; In the figure, 1 is a display alarm device, 2A to 2N are fault signal contacts, 3 is a flicker relay, 4 is an indicator light, 5 is an alarm, 9A to 9N are light emitting diodes,
14 is a reset relay, 15 is a time relay, 16
A to 16N are self-holding relays. Note that corresponding parts in each figure are given corresponding symbols.

Claims (1)

[Scope of Claims] 1. A plurality of fault signal contacts that are installed corresponding to the location indicating the occurrence of a fault or abnormal state and open and close when a fault or abnormal state occurs, and any one of the plurality of fault signal contacts opens or closes. A display alarm device is then energized to display and warn the occurrence of a failure or abnormality, and a plurality of indicators are provided corresponding to the plurality of failure signal contacts and display the location where the failure or abnormality has occurred. , wherein the display/warning device is reset each time any one of the plurality of fault signal contacts opens or closes, and then the input from the opened/closed fault signal contact is set to the display/warning device. Centralized display warning device. 2. The display and alarm device is reset by a reset relay that is energized each time any of the plurality of fault signal contacts opens and closes, and the display and alarm device is reset at the time when the reset relay is energized. 2. The centralized display alarm device according to claim 1, wherein the alarm is activated by a time-limited relay that is energized after a predetermined period of time. 3. Provided corresponding to each of a plurality of fault signal contacts, and energized when the corresponding fault signal contacts open/close and a time-limited relay is energized, thereby indicating a failure or abnormality at the corresponding location. 3. The centralized display alarm device according to claim 2, comprising a plurality of self-holding relays that self-hold the occurrence of . 4. The centralized display alarm device according to any one of claims 1 to 3, wherein the plurality of indicators are light emitting diodes.