JPH047601A - Disaster prevention controller - Google Patents

Abstract

PURPOSE:To control other terminal equipment by restoring a part free from a fault or the part released from the fault by providing an isolator which connects normally and directly power supply to the power line of a terminal equipment side and resotres the power line when the impedance of the power line of the terminal equipement side is over a prescribed value. CONSTITUTION:When the power supply fails, the isolator 6 detects it and operates, and when the isolator 6 operates, the power lines 20, 21 are connected through a fixed resistance element. Accordingly, if the number of pieces of the terminal equipments 5 not having finished their operation is less than pre scribed number of pieces (more or less 1-2 number of pieces), an operating state and be maintained continuously by suppling power, Besides, when the impedance of the power line 21 side becomes over the prescribed value, the isolator 6 is reset, and the power lines 20, 21 are connected directly. Thus, for intance, a thing is placed at the opening and closing space of a fire door, and afterwards, ths thin is removed,and the operation of the fire door is complet ed normally, and when the supply corrent of the terminal equipment 5 disappears, the isolator is reset, and other terminal equipments 5 connected to the power line 21 become capable of beng controlled.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention remotely controls disaster prevention equipment such as fire doors and smoke vents installed in a restricted area by controlling power supplied from a central control panel. The present invention relates to a disaster prevention control device configured to do the following.

[Prior Art] Conventionally, there is a disaster prevention control device that remotely controls fire doors, smoke exhaust vents, etc. installed in a restricted area from a central control panel. When driving such disaster prevention equipment such as fire doors and smoke exhaust vents, a terminal device 5 as shown in FIG. 4 is used.

A latch release device using a solenoid SL or the like releases the engaged state of a latch device such as a fire door or a smoke exhaust port that is engaged in a normal position. The released fire door and smoke vent automatically operate using springs and gravity, and when the operation is completed normally, a limit switch RW operates to cut off the current to the solenoid SL. The terminal device 5 is started by being supplied with power from the power supply device installed on the central control panel side.
Due to the large size of the power supply, there is generally no power supply capacity that can drive a large number of terminals at the same time. Therefore, when controlling multiple terminals 5 at the same time, power is supplied to one or a certain number of terminals at different times in sequence. Terminal 5 is started.

[Problems to be Solved by the Invention] Disaster prevention equipment may not operate even if controlled from a central control panel; for example, there may be an object placed in the opening/closing area of a fire door and the fire door may not close. In this case, power continues to be supplied to the terminal device 5, and a constant power supply current is consumed. When the number of terminal devices 5 that do not operate exceeds a certain number, the capacity of the power supply device is exceeded and the power is shut down, making it impossible to control other terminal devices 5. In the case of a short-circuit accident between power supply lines, the power supply may similarly go down and control of the terminal device 5 may become impossible. A fuse is inserted in the middle of the power supply line to prevent it from melting and bringing down the entire system if the terminal unit is overloaded or the power supply line is short-circuited. However, when adjusting the system during equipment installation, terminal devices that do not work or short circuits in the line frequently occur, requiring time and effort to replace the fuse each time, and in an emergency, other terminal devices connected to the line of the blown fuse There was a drawback that the (disaster prevention equipment) could not be started.

[Means for Solving the Problems] The disaster prevention control device of the present invention starts terminal devices by controlling power supplied from a central control panel to drive disaster prevention devices such as fire doors and smoke exhaust vents. In the disaster prevention control system, the detection operation is performed when the voltage between the power supply lines to which power is supplied from the central control panel falls below a certain value, and the terminal device side The present invention is characterized in that an isolator is provided that supplies power to the power line and normally connects the power directly to the power line on the terminal side to recover when the impedance of the power line on the terminal side is equal to or higher than a predetermined value. It is something.

[Embodiment] An embodiment of the disaster prevention control device of the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the disaster prevention control device of the present invention. This disaster prevention control device includes a central control panel 1 that centrally controls multiple disaster prevention devices;
A power supply line 20° extending from the transmission line 3, an isolator 6 connected to the power supply line 20 branched in the middle,
A power supply line 21 extending from the isolator 6, a control repeater 4 that identifies the control command signal sent from the central control panel 1 via the transmission line 3, and controls the power supply; The terminal device 5 supplies power to the power supply line 22 to start disaster prevention equipment (fire doors, smoke exhaust vents).

To explain the operation of the disaster prevention control device configured in this way, the isolator 6 during normal operation is connected to the power line 20 and the power line 21.
are directly connected. The central control panel 1 has controls for controlling terminal devices 5 that drive fire doors, smoke vents, etc. in the warning area that are required in the event of a fire, either by manual input or based on interlocking signals from a fire alarm system. A control command is given to the repeater 4. The control repeater 4 receiving the control command supplies the power from the power line 21 supplied from the central control panel 1 to the power line 22 on the terminal device 5 side. The terminal device 5 supplied with power operates and starts up the disaster prevention equipment. When the disaster prevention equipment operates normally and finishes its operation, it shuts off the power supplied to the terminal device 5 by itself. In this way, when the terminal device 5 operates normally, it consumes power only when starting up. Therefore, even when controlling multiple terminals 5 at the same time, the time is shifted from the central control panel by the operating time of the terminals 5, or
When an operation end signal is obtained from the terminal device 5, after receiving this signal, a control command is sent to the next control repeater 4, and by sequentially supplying power to the terminal devices 5, all the operations can be performed using a small power source. The operation of the terminal device 5 becomes possible.

The operating current continues to flow through the driven terminal device 5 unless the disaster prevention equipment operates normally. If a plurality of terminal devices 5 do not complete their operation, the power supply capacity of the power supply device of the central control panel 1 will be exceeded and the voltage will drop. Further, when the power supply lines 21 and 22 are short-circuited, the power supply is similarly shut down. When such a power supply goes down, this is detected and the isolator 6 operates.

When the isolator 6 operates, the power line 20 and the power line 2
1 and is connected through a certain resistance element.

Therefore, there are a predetermined number (1
2) or less, the operating state can be maintained by continuing to supply power. Also, the isolator 6 is connected to the power line 2
When the impedance on the 1 side becomes equal to or higher than a predetermined value, the power supply line 20 and the power supply line 21 are restored and directly connected.

For example, if an object is placed in the RwI location of a fire door, this object is removed and the operation ends normally, and when the supply current to the terminal 5 disappears, the isolator 6 is restored and the power line It becomes possible to control other terminal devices 5 connected to 21.

Further, even if the power supply lines 21, 22 are short-circuited, the power supply lines 21, 22 of this system can be isolated and the other systems can be made normal, so that the entire system does not go down.

FIG. 2 shows a circuit diagram showing one embodiment of the isolator 6. As shown in FIG. This isolator 6 includes resistors R1 to R6, transistors Q1 to Q3, and a diode Di.

D2, a light emitting diode LD, a capacitor CI, C2, a relay RL, and a normally open contact MW of the relay RL. When the DC power supply voltage is normally supplied between the power supply lines 20 and the load on the terminal device 5 side is not large (impedance above a predetermined value), current flows to the base of the transistor 1 via the resistors R4 and R5 and the transistor Q3. is in the on state. Therefore, the transistor Q2 is in the off state,
Further, transistor Q3 is turned off and drives relay RL. The normally open contact MW of the relay RL is closed, and the power line 20 is directly connected to the power line 21 via the normally open contact MW, so that power is normally supplied to the terminal device 5 side. When the source voltage decreases and the voltage across the power supply line 21 becomes less than a predetermined value, transistor Q3 is turned off and transistor Q2 is turned on. Therefore, transistor Q1 is turned off, the driving state of relay RL is released, and its normally open contact MW is opened. When the normally open contact MW opens, the power supply on the power line 20 side is restored to normal voltage, so the power line 21 on the terminal unit 5 side has a resistor R1 and a light emitting diode LD.
Power is now supplied through the If the impedance on the terminal device 5 side is more than a predetermined value, the voltage between the lines of the power supply line 21 becomes more than the predetermined value, so the transistor Q3 is turned on, and the relay RL is similarly driven and the normally open contact M is turned on.
W is closed, power is normally supplied to the power supply line 21 on the terminal device 5 side, and the power is restored. Furthermore, when the impedance on the terminal device 5 side is below a predetermined value, the transistor Q3 remains in the off state, and the power supply line 21 side is connected to a light emitting diode L to which power is supplied via the resistor R1 and the light emitting diode LD.
D emits light to indicate the operating state. In this case, even if there are terminal devices 5 in the middle of operation or terminal devices 5 whose operation is not completed, when the number of terminal devices 5 is small (1 to 2), the operating state can be maintained by this current supply. When the operation is completed, the power supply from the power line 21 is restored. Furthermore, if the power line 21 is short-circuited, this power line 21 can be isolated.

FIG. 3 is a block diagram showing one embodiment of the control repeater 4. As shown in FIG. This control repeater 4 includes an input/output conversion circuit 4o that transmits and receives transmission signals, an address detection circuit 41 that detects whether a received address matches a unique address, and a command identification circuit 42 that identifies a received command. A switch circuit 43 is controlled based on a control signal from a command identification circuit 42.

The input/output conversion circuit 40 is in a normal receiving state, and the transmission line 3
It is possible to receive transmission signals from the central control panel 1 via the central control panel 1 at any time. When the input/output conversion circuit 40 receives the transmission signal, the address signal is sent to the address detection circuit 41.
Output to. Address detection circuit 41 is input/output conversion circuit 4
When the received address from 0 and the unique address set for itself match, an address match signal is output to the command identification port F#142. The command identification circuit 42 analyzes the command signal received by the input/output conversion circuit 40, and if the type of command is a terminal device control command, outputs a control signal to the switch circuit 43, drives the switch circuit 43, and closes the contact. let Therefore, the power line 21 is directly connected to the power line 22, and power is supplied to the terminal device 5.

In this way, the control repeater 4 can identify the control command specified by itself from the central control panel 1 using the transmission means, and can supply power to the terminal device 5 if the control command is its own.

[Effects of the Invention] The disaster prevention control device of the present invention has an isolator inserted into the power supply line, and is suitable for cases where there are multiple terminals that do not terminate operation even when control power is supplied, or when the power supply line on the terminal side is short-circuited. Even if the power goes down, the faulty part can be temporarily isolated to prevent the entire system from going down, and the parts without the fault or the fault-free part can be restored to control other terminals. can be made possible. Further, since there is no need to insert a fuse into the power supply line, there is an effect that efficient adjustment work can be carried out since there is no need to replace the fuse, even during adjustment during installation of equipment where overload conditions and short-circuit conditions frequently occur.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the disaster prevention control device of the present invention, Fig. 2 is a circuit diagram showing an embodiment of an isolator used in the device, and Fig. 3 is a circuit diagram showing an embodiment of the isolator used in the device. FIG. 4 is a block diagram showing one embodiment of the control repeater, and FIG. 4 is a circuit diagram showing one embodiment of the terminal device. 1... Central control panel, 20, 21. 22... Power line, 3... Transmission line, 4... Control repeater, 5... Terminal, 6... Isolator, 40... - Input/output conversion circuit, 41...Address detection circuit, 42...Command identification circuit, 43...Switch circuit, R1-R6...
Resistor, DI, D2...Diode, C1, C2...
Capacitor, LD...Light emitting diode, Q1~Q3・
...Transistor, RL...Relay, MW...Normally open contact of relay RL, SL...Solenoid, RW...
Limit switch.

Claims (1)

[Claims] In a disaster prevention control device that starts terminal devices by controlling power supplied from a central control panel and drives disaster prevention equipment such as fire doors and smoke exhaust vents, power is supplied to the central control panel. It detects when the voltage between the power lines falls below a certain value, and once the power is supplied to the power line on the terminal side through a resistance element with a predetermined resistance value, the power line is connected between the power lines on the terminal side. A disaster prevention control device comprising an isolator that normally connects a power source directly to a power line on the terminal side to restore power when the impedance of the terminal device exceeds a predetermined value.