JPH0426944Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for checking whether a sensor is correctly connected to a corresponding line of a receiver in fire alarm equipment.

Fire alarm equipment consists of a detector that detects fire, and a receiver that operates upon receiving the detection signal and provides various displays and alarms, as well as controlling various related equipment as necessary. The equipment is connected in parallel to each line consisting of a pair of lines provided for each warning area. Next, the configuration will be explained with reference to Figure 1.
Re is a receiver, and De ₁ to De _o are detectors belonging to each line of the receiver Re provided for each warning area.
Equipped with means for confirming operation. and the above receiver
Between the positive and negative lines P ₁ and P ₂ of Re, district relays N ₁ to _{N o} of each line connect the receiver Re and the sensors De ₁ to De _o , l _{1 to lo} , and the above-mentioned sensors. Through De ₁ to De _o , and the own make contacts n ₁₁ to n _o1 through the resistors R ₁₁ to R _1o and the break contact Sr(a) of the test recovery switch, and further to each contact 1 of the rotary switch RS.
~n and fire indicator test switch transfer contacts
Each is connected to the normally closed side of Sf(a) through a resistor _R4 . The detectors De ₁ to _{De o} are provided with contacts Ca ₁ to _{Ca o} that close upon detection of fire, and confirmation lights Lc _{1 to 1} as the operation confirmation means, which are equipped with resistors CR ₁ to _{CR o} connected in parallel. It consists of Lco _and
A plurality of terminal resistors ER ₁ to _{ER o} common to each line are connected in parallel between the lines l ₁ to lo _{and lc} . Further, between the above-mentioned lines P ₁ and P ₂ , a voltmeter V is connected to the normally open side of the transfer contact S ₁ of the relay S (described later) and the make contact S ₂ of the relay S via the resistor R ₂ .
and diode _D2 , resistor _R3 , the normally closed side of the transfer contact Sf(a) of the above switch, and each contact 1 to n of the rotary switch RS, and the normally closed side of the transfer contact _S1 of the relay S. The above relay S is connected to the make contact _Sl of the circuit continuity test switch.
Through (a), the switch warning light L ₀ is connected to the flicker circuit FR and the make contacts Sf (b) and Sl of each of the above switches.
(b), Through Sl(b), the district indicator lights L ₁ to _Lo are connected to the make contacts n ₁₂ to n _o2 of the district relays N ₁ to _No ,
A fire relay F is connected between the lines P 1 and P 2 through the make contacts n ₁₃ to _{no 3} of the district relays N _{1 to No} , and a fire indicator Lf is connected between the lines P ₁ and P ₂ through the make contact f ₁ of the fire relay F, respectively. ing.

In the event of a fire, the detectors De ₁ to _{De o}
is activated, that is, its contacts Ca ₁ ~ _{Ca o} are closed and the line L ₁ ~ _{L o} , L _c becomes low impedance through the confirmation light Lc ₁ ~ _{Lc o} , the district relay of the receiver Re
N ₁ to _{N o} are activated and held by their own make contacts n ₁₁ to n _o1 , and the other make contacts
Through the operation of the area indicator lights L ₁ - _{L o} and the fire relay F by n ₁₂ - n _o2 and n ₁₃ - _{n o3} , the fire indicator light Lf is lit by the make contact f ₁ to indicate the occurrence of a fire. The location of the occurrence is displayed, and the above operation controls an alarm device (not shown) or various interlocking devices, and the confirmation lights Lc ₁ to Lc _o of the activated detectors De ₁ to De _o light up to indicate reception. It will be displayed that a fire signal has been sent to the aircraft. Furthermore, as mentioned above, district relays N ₁ to _{N o} have their own make contacts n ₁₁ to n _o1.
The resistance in the holding circuit when held by
The voltage drop due to R ₁₁ ~ _{R 1o} causes the sensor De ₁ ~
The confirmation lights Lc ₁ to Lc _o of De _o are kept lit. In addition, diodes D ₁₁ - connected in parallel with district relays N ₁ - N _o , relays S and fire relays F, respectively.
The back electromotive force generated when each relay is restored is absorbed by D _1o , D ₃ and D ₄ .

In addition, various tests are conducted on such fire alarm equipment from time to time in order to ensure that it can detect fires that may occur at any time, and to ensure that its various functions are always operating reliably. To explain this step by step, first, in the fire indication test, the test switch was operated to switch the transfer contact S _f(a) from the resistor R ₃ side to the R ₄ side, and the rotary switch
When RS is turned and connected to contacts 1 to n in sequence, the district relays N ₁ to N _o are activated through the resistor R ₄ each time, and each part of the receiver Re is activated in the same way as in the case of a fire. In this case, the break contact S _r(a) is opened by the test recovery switch. In addition, in the circuit continuity test, the test switch is operated to close the make contact S _l(a) and activate the relay S.
By switching the transfer contact _S1 , the voltmeter V, which constantly indicates the voltage between the lines _P1 and _P2 through the resistor _R5 , is connected to the resistor _R2 , and by turning the rotary switch RS, the contacts 1 to 1 are sequentially measured. When connected to n,
In each connection, a voltmeter V is connected in parallel with the relevant district relays _N1 to _No through resistors _R2 and _R3 to measure and indicate the voltage across them. Therefore, by checking the indication of the voltmeter V for each line, it is possible to check whether there is a disconnection _or the like between the lines l ₁ to lo and l _c . In this case, during the test, the sensors De ₁ ~ _{De o}
operates or short-circuits between the lines L ₁ - L _O , L _O , L _C , the voltage across the district relays N ₁ - N _o rises, but the voltmeter V indicates that the make contact S of the relay S protected by a diode D ₂ connected through ₂ . In both of the above tests, each switch must be returned to its normal position after completion of the test, so while the above switches are being operated, their contacts S _f(a) ,
Other contacts S f _(b) and S _r(a) respectively interlock with S l(a) and _{S r(a)} ,
The switch warning light L ₀ blinks through the flicker circuit FR of S _l(b ) and S _r(b) to call for attention.

In addition to the above two tests, there is also a detector fire operation test, in which the receiver Re is in normal condition and the detector
If De ₁ - _{De o} are heat sensors, for example, the detection is performed by simulatively activating the sensors D ₁ - De _o using a heating tester or the like and measuring the time until they are activated.

However, in the case of large buildings such as skyscrapers, the number of warning zones increases, making the connection between the sensor and receiver complicated, and there is a risk that the sensor may be mistakenly connected to another line. There is. Therefore, in such cases, after connecting the sensor to the receiver,
It is necessary to check for each sensor whether the connection is properly made, but if you do this,
Conventionally, each sensor was simulated activated in sequence through the above-mentioned fire activation test, and each time the installation area of the activated sensor and the associated receiver activation line were compared between the sensor side and the receiver side. This has the disadvantage that the process is cumbersome and time-consuming, since the two devices must communicate with each other and check whether the connection between the two is correct or not.

In view of the above points, the present invention has been developed to easily and easily check whether or not a sensor equipped with a confirmation light is correctly connected to a line in a predetermined caution area among multiple lines from the side where the sensor is installed. The purpose of this invention is to obtain a device for confirming the connection of a sensor in a fire alarm system, which can be confirmed by the lighting state of a confirmation light, and one embodiment thereof will be described below with reference to FIG. Since this figure 2 merely adds an additional circuit AC to the configuration of figure 1, the same members as in figure 1 are given the same reference numerals as in figure 1, and their explanations are omitted. This will be explained in detail. The open and closed states of the contacts of the switch and relay shown in FIG. 2 indicate the open and closed states during fire monitoring.

The additional circuit AC shown in Fig. 2 has the make contacts S _{f (a)} , S _{1 (b)} , S _r(b) and flicker circuit
A series circuit consisting of the light emitting part LED of the photocoupler PC and a resistor _R6 is connected in parallel with the switch warning light _L0 connected between the positive and negative lines _P1 and _P2 through the FR.
In addition, the light receiving part PT of the photocoupler PC is connected to the make contact f ₂ of the fire relay F and the emitter of the transistor T _r .
The above line P ₁ through the collector and diode D ₅
and fire indication test switch transfer contact S _f(a)
is connected between the normally closed side of the In addition, the break contact S _c of the sensor connection confirmation switch has resistance.
Connected between lines P ₁ and P ₂ through R ₇ ,
It is configured to be connected between the line _P1 and the base of the transistor _Tr through a resistor _R8 .

In the above embodiment, the flicker circuit FR and the light emitting unit LED of the photocoupler PC constitute an intermittent signal generating means for outputting an intermittent signal during testing, and the light receiving unit PT of the photocoupler PC and the transistor _Tr constitute an intermittent signal generating means. The switch means which opens and closes intermittently by the intermittent signal output of
In the case of FIG. 2, the rotary switch RS selectively connects the line to be tested from _among the lines at the time of testing, and also in the case of _{FIG .} , l _c are used as switching connection means for selectively connecting between the lines l _{1 ,} l _c - _{l o} , and l _c in Fig. ₁ . Even in the case of Figure 2, it constitutes a fire signal detection means that detects the operation of the detectors connected to each line, and also serves as a test recovery switch in Figure 1 and a newly installed connection confirmation switch in Figure 2. The switch is a switch that is operated during the test of this invention, that is, when checking the connection of the sensor, and the test recovery switch is a break contact _Sr(a) whose contacts are opened and closed in conjunction with manual operation.
and make contact S _r(a) , and the connection confirmation switch is configured such that its break contact S _c is opened or closed by manual operation.

Next, a case of checking whether the connection between the receiver _Re and the sensors D _e1 to _{D eo} is correct will be explained. First, the break contact of the connection confirmation switch that is closed in the monitoring state.
Break contact opened by manual operation of S _c and closed under monitoring by manual operation of test recovery switch
Open S _r(a) to release the self-holding circuit of district relays N ₁ to _{N o} , and close the make contact S _r(b) of the same switch, which is open during monitoring. This causes the flicker circuit FR to operate, causing the switch warning light L ₀ to blink.
The light-emitting LED of the photocoupler PC connected in parallel with it also flashes in sync.

And in this state, for example, the sensor D _e1
To check the connection, set the line when the sensor D _e1 is connected correctly, that is, set the rotary switch RS as a switching connection means to contact 1,
The transistor T _r of the switching means is connected between the pair of lines L ₁ and L _C , the make contact f ₂ of the fire relay F, the light receiving part PT of the photocoupler PC, the diode D ₅ , and the contact S _{f (a)} of the fire indicator test switch. Connect through.

Next, when the above-mentioned detector D _e1 is simulated activated by the above-mentioned fire operation test, that is, by heating the sensor D _e1 with a heating tester, the district relay N ₁ as a fire signal detection means is activated. At the same time, the confirmation light L _c1 lights up, and each part starts operating again. The accompanying activation of fire relay F closes make contact _f2 , which had been open until then. Then, the light receiving part PT of the photocoupler PC turns on the transistor T _r in synchronization with the flashing of the light emitting part LED, and connects the pair of lines.
Intermittently short circuit between l ₁ and l _c , that is, the sensor.

Therefore, the activated sensor D _e1 detects the line to be tested, that is, the line l ₁ . If the connection between L _{and C} is correct, the confirmation light L _C1 will blink.
However, if the activated sensor D _e1 is mistakenly connected between the lines of another line, for example, L ₂ and L _C , the confirmation light L _C1 will turn on due to the activation of the district relay N ₂ , but the Since there is no short-circuit between l ₂ and l _c by the switch means, the confirmation light L _c1 simply continues to light up, and due to this difference in display method, the sensor D _e1 is You can check whether the lines l ₁ and _lc of the line you are trying to perform are properly connected.
And the sensor D _e2 installed in another warning area ~
To check the connection of D _eo , align the rotary switch RS with contacts 2 to n, connect the transistor T _r of the switch means between the pair of lines of the desired line to be tested, and then You can do the same.

In the above embodiment, the break contact S _c of the connection confirmation switch and the make contact S _{r (b)} of the test recovery switch are operated separately.
During the above test, that is, when checking the connection of the sensor, both contacts are operated at the same time, so they can be integrated by a transfer contact.

Furthermore, in the above embodiment, the rotary switch RS for various tests is used as a switching connection means, and the flicker circuit FR is used as a stage of an intermittent signal generation means, thereby achieving common use of parts. You can.

As described above, according to the present invention, fire detectors equipped with confirmation lights are connected in parallel to each circuit consisting of a pair of tracks provided in each warning area, and when the detector connected to each circuit is activated, A fire alarm system in which the confirmation light of the detector is lit continuously, the receiver detects the operation of the detector using the fire signal detection means provided for each line, and the output indicates the warning area where a fire may occur. In this case, the receiver includes an intermittent signal generating means for outputting an intermittent signal during a test in which sensors connected in parallel to each line are operated in a pseudo manner, and an intermittent signal generating means for intermittently opening and closing by the output of the intermittent signal generating means. A switch means and a switching connection means for selectively connecting the switching means between a pair of lines of each of the lines, wherein the switching means connects the pair of lines of the line to be tested. If the tested sensor is correctly connected to the line selected by the switching connection means, the confirmation light of that sensor will be lit intermittently, and if it is incorrectly connected to a different line. In this case, the confirmation light of the sensor is lit continuously, so the sensor itself can check whether the connection to the receiver is correct or not, which eliminates the need for the conventional connection between the sensor side and the receiver. There is no need for mutual verification, and the confirmation work can be done easily and in a short time.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing a conventional fire alarm system, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. R _e ...Receiver, D _e1 ~ _{D eo} ... Sensor, L _c1 ~ L _co
... Confirmation light, l ₁ , l _c ~ _{l o} , l _c ... each line consisting of a pair of lines, N ₁ ~ _No ... district relay as fire signal detection means, FR, LED ... intermittent signal generation Flicker circuit as means and light emitting part of photocoupler,
PT, T _r ...Photocoupler light receiving part and transistor as switching means, RS...Rotary switch as switching connection means.

Claims (1)

[Scope of claim for utility model registration] A fire detector equipped with a confirmation light is connected in parallel to each line consisting of a pair of lines provided in each warning area,
When a sensor connected to each line is activated, the confirmation light of that sensor is lit continuously, and the fire signal detection means provided for each line in the receiver detects the sensor operation, and the output indicates the occurrence of a fire. In a fire alarm system designed to display a warning area of A switch means that is intermittently opened and closed by the output of the intermittent signal generating means, and a switching connection means that selectively connects the switch means between a pair of lines of each of the above-mentioned lines, and the above-mentioned switch means is about to perform a test. When a pair of lines of the above line are selectively connected through the switching connection means, if the tested sensor is correctly connected to the line selected by the switching connection means, the confirmation light of that sensor will be intermittently. A device for checking connection of a sensor in fire alarm equipment, characterized in that if the sensor is turned on and the sensor is incorrectly connected to a different line, the confirmation light of the sensor is turned on continuously.