JPS6356592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a relay system for fire alarm equipment in an apartment complex, in which a fire detector is connected to a power line and a signal line drawn out from a receiver via a repeater installed in each dwelling unit. Regarding.

In recent years, fire alarm equipment in public housing, condominiums, and other public housing complexes has been equipped with a repeater that functions as a fire receiving panel in each dwelling unit, and a line is connected to the fire detector in the dwelling unit. At the same time, a facility configuration has been proposed in which repeaters in each dwelling unit are connected to a central receiver by a line for centralized monitoring.

By the way, with fire alarm equipment such as this, in which a repeater is installed in each residential unit, it is necessary to take into consideration the operation test of the fire detector, the line monitoring between the fire detector and the repeater, and between each repeater and receiver. This requires a new repeater function that differs from conventional equipment in which fire detectors for multiple residential units are integrated into one repeater, for example, by floor.

The present invention has been made in view of the above, and is a fire alarm system for an apartment building in which a fire detector is connected to a power line and a signal line drawn out from a receiver via a repeater installed in each dwelling unit. Providing a repeater for use in fire alarm equipment for apartment complexes that can accurately relay output fire signals to receivers, test the operation of fire detectors, and monitor detector side lines and receiver side lines. The purpose is to

Hereinafter, the present invention will be explained based on the drawings.

The figure is a circuit diagram showing one embodiment of the present invention.

First, to explain the configuration, 1 is a receiver,
From the receiver 1, a repeater 10a installed for each dwelling unit,
A power supply line 2, a signal line 3, and a common line 4 are each drawn out to 10b, . . . 10n.

The receiver 1 includes a transistor Q 10 and a resistor R ₁₄ that detect the current flowing through the signal line 3 based on the fire relay signal from any one of the repeaters 10a, 10b,...10n _.
It has a current detection circuit consisting of ~ _R16 , a transistor
When _Q10 is turned on, reception relay 6 is activated.

In addition, a continuity test switch 5, an ammeter 7, and a resistor R ₁₇ are connected in parallel with the current detection circuit having a transistor Q ₁₀ .
and a test circuit for continuity testing with diode D ₃ is connected.

Next, the configuration of the repeaters 10a, 10b...10n will be explained using the repeater 10a as a representative. The power line 2 from the receiver 1 is connected to the terminal E, the signal line 3 is connected to the terminal L, and the common line 4 is connected to the terminal E. is connected to the terminal C, and the fire detector 20a is connected between the terminal E connected to the power supply line 2 and the common line 4 side of the terminal C via a resistor _R1 and a diode _D1 .

Resistor R ₁ provided in the power supply line to fire detector 20a is connected to transistor Q ₁ and resistors R ₂ and R ₃
Together with this, it constitutes a current detection circuit that detects the current flowing due to the drop in line impedance when the fire detector 20 is activated, and a relay 12 and a fire indicator LD using a light emitting diode are connected in parallel as the collector load of the transistor _Q1 . Connected.

Also, the signal voltage from terminal E is divided by resistors R ₄ and R ₅ and connected to the base of transistor Q ₂ , and transistor Q ₂ is always turned on by receiving power from receiver 1. The collector of Q ₂ is connected to the base of transistor Q ₃ via a resistor R ₆ .

_The collector of transistor Q ₃ is connected to a voltage divider circuit consisting of resistors R ₈ and R ₉ , and the divided voltage by resistors R ₈ and R ₉ is applied to the base of transistor Q ₄ , which is used as a collector load for the receiver. Terminal resistor _R02 is connected to monitor the disconnection of signal line 3 and common line 4 from 1.
The other end of _R02 is drawn out to terminal LE.

On the other hand, a terminating resistor R ₀₁ is connected in parallel to the fire detector 20a to monitor disconnection of the line from the repeater 10a to the fire detector 20a. A test switch 14 is connected in parallel via a resistor _R13 .

Terminal low resistance R ₀₁ to monitor disconnection of this sensor line
transistor as a means of monitoring the current flowing through the
Q ₅ is provided, and the base of transistor Q ₅ is a resistor
Fire detector 20a via R ₁₂ and diode D ₂
The emitter of transistor _Q5 is connected to the power supply line side of the transistor
_Q3 's emitter is connected.

Furthermore, the relay contact 12a of the relay 12, which is energized when the transistor _Q1 is turned on due to the activation of the fire detector 20a, is connected between the connection terminals L and C of the signal line 3 from the receiver 1 and the common line 4 through a resistor _R10. connected.

In the circuit configuration of such a repeater 10a,
a current sensing circuit having a transistor Q ₁ ; a relay 12 energized by turning on the transistor Q ₁ ;
and relay contact 1 that closes when relay 12 is energized.
2a constitutes a fire signal relay circuit that relays and outputs a fire signal to the receiver 1 when the fire detector 20a is activated, and also includes a terminating resistor R ₀₁ and a terminating resistor R ₀₁ on the fire detector 20a side. Continuity detection uses a transistor _Q5 that is turned on by the flowing monitoring current to detect continuity of the line to which the fire detector 20a is connected, and relays the power from the receiver 1 to the next stage repeater 20b as a line conduction signal. It constitutes a circuit.

Note that the circuit section equipped with transistors Q ₂ to _{Q 4} is provided to monitor the power line 2, signal line 3, and common line 4 from the receiver 1; The LE terminal that becomes the output is not used in the first stage repeater 10a, and the line monitoring function of the power line 2 and signal line 3 from the receiver 1 is performed in the final stage repeater 10n, which will be explained later. The terminals are connected to achieve this.

The circuit configuration of the repeater 10a is the same for the other repeaters 10b to 10n.

Next, signal line connections between the repeaters 10a, 10b, . . . 10n will be explained.

First, each of the power line 2, signal line 3, and common line 4 from the receiver 1 is connected to each of the repeater terminals E, L, and C for the repeaters 10b, . . . 10n, similarly to the repeater 10a. There is.

On the other hand, in the line connection between the repeaters 10a and 10b, first, the connection terminal E of the power line 2 in the repeater 10a is connected to the terminal IN of the same repeater 10a,
The terminal OUT of the repeater 10a is connected to the next stage repeater 10b.
is connected to terminal IN of repeater 10b, and terminal OUT of repeater 10b.
is similarly connected to the terminal IN of the next stage repeater (not shown), and for the last stage repeater 10n, the signal line from the terminal OUT of the previous stage repeater is connected to the terminal IN, and the terminal OUT is left open. be.

Further, repeaters 10 other than the final stage repeater 10n
The terminal LE of the terminating resistor R ₀₂ in a, 10b, etc. is in an open state, but the connecting terminal L of the signal line 3 is connected to the terminal LE of the terminating resistor R ₀₂ only in the final stage repeater 10n. connected by.

Next, the action will be explained.

First, the operation in the normal monitoring state will be explained. In the normal monitoring state, the fire detectors 20a, 20
_b , _. The base current flows through the resistor _R12 to the transistor _Q5 , and the transistor _Q5 is turned on.

By turning on this transistor _Q5 , the power from the power line 2 connected from the terminal E by the crossover wire is transferred to the terminal IN.
Therefore, power as a line conduction signal is supplied from the terminal OUT of the repeater 10a to the terminal IN of the next stage repeater 10b via the transistor _Q5 .

Similarly, the fire detector 20 is connected to the repeater 10b.
Transistor Q ₅ is turned on by the monitoring current flowing through the termination resistor R ₀₁ on the b side, and the relay 10 in the previous stage is turned on.
The power supply as a line conduction signal supplied from a is sent to the next stage repeater.

Therefore, power as a line conduction signal is supplied to the terminal IN of the final stage repeater 10n from the previous stage repeater, and the transistor _Q5 is turned on by the monitoring current flowing through the terminating resistor _R01 .

When the transistor Q ₅ in the final stage repeater 10n is turned on, the transistor Q ₂ of the repeater 10n is connected to the resistor R ₄ ,
It is turned on by receiving the divided voltage by _R5 , and transistors _Q3 and _Q4 are turned on by turning on transistor _Q2 .
As a result, transistor Q4 is turned on, and a termination resistor _R02 is inserted and connected to the ends of signal line ₃ and common line 4 from receiver 1, and a monitoring current is passed between signal line 3 and common line 4. The line is monitored on the receiver 1 side.

Next, disconnection detection in a normal monitoring state will be explained.

First, the line breakage of the fire detectors 20a, 20b,...20n connected to the repeaters 10a, 10b,...10n, for example, the fire detector 2 in the repeater 10a.
If the line 0a is disconnected, the monitoring current will no longer flow through the terminating resistor _R01 , so the transistor
_Q5 turns off, and the next stage repeaters 10b,...10
Cut off transmission of the line conduction signal to n.

Therefore, the transistor Q ₅ of the final stage repeater 10n is also turned off, and the power supply to the transistor Q ₃ is cut off, so that the transistors Q ₃ and Q ₄
is turned off and the terminating resistor _R02 of the repeater 10n inserted and connected between the signal line 3 and the common line 4 is disconnected, making it impossible to provide a monitoring current at the receiver 1. Detects line breaks.

On the other hand, if the power line 2 from the receiver 1 is disconnected, the power supply to the terminal E of the final stage repeater 10n is cut off regardless of the disconnection location, turning off the transistor _Q4 , and the termination resistance
When the monitoring current by R ₀₂ is cut off, the receiver 1 detects a wire breakage.

Furthermore, if the signal line 3 or the common line 4 is disconnected, the power supply to the terminating resistor R ₀₂ of the final stage repeater 10n is cut off, or the transistor Q ₄
By turning off, the monitoring current is cut off, and a disconnection can be detected in the same way.

Incidentally, a disconnection check in the receiver 1 is performed by closing the continuity test switch 5 and observing the fluctuation of the ammeter 7.

Next, we will explain the operation when the fire detector is activated. For example, if the fire detector 20a connected to the repeater 10a detects a fire and activates,
The impedance between the pair of lines drawn out from the repeater 10a becomes low, and the current due to this decrease in line impedance flows through the resistor R ₁ and the diode D ₁
When the transistor _Q1 is turned on, the relay 12 is energized, and by closing the relay contact 12a, a low impedance is created between the signal line 3 from the receiver 1 and the common line 4 via the resistor _R10 , and the signal is line 3
The current that flows due to the decrease in the line impedance between the
_Q10 turns on, energizes the reception relay 6, and displays the reception of a fire.

The relay output of the fire signal caused by the activation of the fire detector 20a is the same for the other relays 10b, . . . 10n.

Further, the operation test of the fire detectors 20a to 20n is performed by closing the operation test switch 14 provided in each of the repeaters 10a, 10b, . . . 10n.

For example, the operation test switch 14 of the repeater 10a
When closed, the impedance between the pair of lines from the repeater 10a becomes low in the same way as when the fire detector 20a is activated, and by turning on the transistor _Q1 ,
energizing the relay 12 and closing the relay contact 12a;
When the transistor _Q10 in the receiver 1 is turned on, the reception relay 6 is activated to perform a reception display based on an operation test.

As explained above, according to the present invention, a relay of fire alarm equipment in an apartment building is provided in which a fire detector is connected to a power line and a signal line drawn out from a receiver via a repeater provided in each dwelling unit. As a device, when a fire detector activates and makes the impedance between the pair of lines connected to the repeater low, the drop in line impedance is detected and the signal line between the pair of signal lines led from the receiver to the repeater is detected. A fire signal relay circuit for low impedance, a continuity detection circuit that detects continuity in the line to which the fire detector is connected and relays the power from the receiver to the next stage repeater as a line conduction signal, and a continuity detection circuit for the final stage. In the repeater, we installed a terminating resistor that is activated by the line conduction signal from the previous repeater and is inserted and connected between the pair of signal lines from the receiver, so that The relay output of the fire signal in the fire alarm equipment that connects the fire detectors in the dwelling unit to the central receiver, the monitoring of the fire detector side line and the receiver side line, and the operation test of the fire detector. This circuit configuration has the effect of providing a repeater that properly and reliably realizes the system function of a fire alarm system in an apartment building in which a repeater is provided for each dwelling unit.

[Brief explanation of the drawing]

The figure is a circuit diagram showing one embodiment of the present invention. 1...Receiver, 2...Power line, 3...Signal line,
4...Common wire, 5...Continuity test switch, 6...
...Reception relay, 7...Ammeter, 10a, 10b,
10n...Repeater, 12...Relay, 12a...Relay contact, 14...Operation test switch, 20a,
20b, 20n...Fire detector, _R1 to _R16 ...Resistor, _R01 , _R02 ...Terminal resistor, _Q1 to _Q5 , _Q10 ...Transistor, _D1 to _D3 ...Diode, LD ...Alarm indicator light.

Claims (1)

[Claims] 1. An apartment building in which a plurality of repeaters provided in each dwelling unit are connected to the power line and signal line drawn out from the receiver, and a fire detector is connected via each of the repeaters. In the repeater for fire alarm equipment in the above, when a fire detector is activated in each of the repeaters to make the impedance between a pair of lines connected to the repeater low, a decrease in the line impedance is detected and the above-mentioned A fire signal relay circuit that creates low impedance between a pair of signal lines drawn out from the receiver to the repeater, and a fire signal relay circuit that detects continuity of the line to which the fire detector is connected and operates to connect the power source from the receiver to the line. A continuity detection circuit is provided as a continuity signal to be relay-connected to a continuity detection circuit of a next-stage repeater, and the line conduction signal is sequentially relay-connected to a final-stage repeater via the continuity detection circuit of a previous-stage repeater. A repeater for fire alarm equipment, characterized in that a terminating resistor is inserted and connected between a pair of signal lines from a receiver.