JP2016173647A - Power supply device for wireless relay, and alarm system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device for a wireless relay that blocks the occurrence of an alarm indicating the disconnection of a wire when an alarm indicating the disconnection of the wire between the wireless relay and a receiver is not required without requiring the power supply device for the wireless relay in connecting the wireless relay to the receiver, and provide an alarm system including the power supply device for the wireless relay.SOLUTION: A power supply device 1 for a wireless relay includes: a pair relay terminals 21 connectable to a wireless relay 4 via a relay wire 11; a reception terminal 22 connectable to a receiver 5 via a reception wire 12; a reception disconnection monitoring circuit 23 that is connected to the reception terminal 22 and monitors the disconnection of the reception wire 12; and an artificial terminal resistor 24 to be connected between the relay terminals 21 when non-connection of the reception wire 12 is recognized in the reception disconnection monitoring circuit 23.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power supply device for a wireless repeater that supplies power to a wireless repeater and an alarm system including the power supply device for the wireless repeater.

  Conventionally, a wireless repeater that relays between a wireless sensor and a receiver is known. Patent Document 1 discloses a disaster prevention monitoring system including such a wireless repeater (wireless reception repeater). In Patent Document 1, a wireless repeater is supplied with DC power from a receiver through a power line.

  In addition, an alarm system in which a wireless repeater power supply device is separately provided as a power supply for the wireless repeater is also known. In this case, the power supply device for the wireless repeater may be interposed between the wireless repeater and the receiver, and may have a function of relaying a signal from the wireless repeater to the receiver. In this case, the wireless repeater power supply device and the wireless repeater are connected by a power line, while the wireless repeater and the receiver are connected via, for example, a wiring (signal line) via the wireless repeater power supply device. ). However, there is a case where the wireless repeater and the receiver are directly connected by wiring without using the wireless repeater power supply device while using such a wireless repeater power supply device.

  A terminal resistor is connected to the end of the wiring to the wireless repeater for the purpose of monitoring the disconnection of the wiring to the wireless repeater. The wireless repeater power supply device is provided with a circuit for monitoring the disconnection of the wiring. This circuit detects a weak current based on a terminal resistance flowing in the wiring, and confirms that the weak current does not flow. When detected, it is determined that the wiring is disconnected. In this way, the circuit monitors the disconnection of the wiring with the wireless repeater. When the disconnection of the wiring is confirmed, an alarm indicating that the wiring is disconnected is output.

JP 2011-96169 A

  However, when the wireless repeater and the receiver are directly connected without wiring via the wireless repeater power supply device, the wireless repeater and the wireless repeater power supply device are not connected by wiring. A weak current cannot be detected, and a circuit that monitors the disconnection of the wiring determines that the wiring is disconnected. For this reason, since the wireless repeater and the receiver are directly connected by wiring, it is not originally disconnected, so an alarm that the wiring between the wireless repeater is disconnected is unnecessary. An alarm will be output.

  The present invention has been made in order to solve the above-described problems, and the wiring between the wireless repeater and the wireless repeater is not connected to the wireless repeater and the receiver without using the wireless repeater power supply device. The present invention provides a wireless repeater power supply device that cuts off the occurrence of an alarm that indicates that the wiring has been disconnected, and an alarm system including the wireless repeater power supply device when an alarm indicating that the wire is disconnected is unnecessary.

  The power supply device for the wireless repeater according to the present invention supplies power to the wireless repeater that transmits and receives signals to and from the wireless sensor, and is interposed between the wireless repeater and the receiver. In a power supply device for a wireless repeater capable of relaying a signal from a wireless repeater to a receiver, a pair of relay terminals connectable to the wireless repeater via a relay wiring, and a receiving wiring to the receiver Connected between the receiving terminal, the receiving disconnection monitoring circuit that is connected to the receiving terminal and monitors the disconnection of the receiving wiring, and when the receiving disconnection monitoring circuit confirms that the receiving wiring is not connected, it is connected between the relay terminals. And a pseudo-termination resistor.

  According to the present invention, the pseudo-termination resistor is connected between the relay terminals when the disconnection (non-connection) of the reception wiring is confirmed in the reception disconnection monitoring circuit. For this reason, even if the relay wiring is disconnected (even if the relay wiring is not connected), the wireless repeater power supply apparatus can block the occurrence of the relay disconnection alarm. Therefore, there is an alarm that the wiring (relay wiring) between the wireless repeater and the receiver is disconnected, such as a form in which the wireless repeater and the receiver are directly connected without using the power supply device for the wireless repeater. When it is unnecessary, it is possible to block the generation of an alarm that the wiring is disconnected.

It is a block diagram which shows the alarm system 2 which concerns on Embodiment 1 of this invention. 1 is a block diagram showing a wireless repeater power supply device 1 according to a first embodiment of the present invention. It is a block diagram which shows the alarm system 2 which concerns on Embodiment 1 of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a power supply device 1 for a wireless repeater and an alarm system 2 according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing an alarm system 2 according to Embodiment 1 of the present invention. The alarm system 2 will be described based on FIG. As shown in FIG. 1, the alarm system 2 includes a wireless sensor 3, a wireless relay device 4, a receiver 5, and a wireless relay power supply device 1. The wireless sensor 3 is a fire sensor that detects smoke or the like, for example. The wireless sensor 3 is not directly connected to the receiver 5 by wire, and a fire signal or the like is transmitted and received wirelessly via the wireless relay 4.

  The wireless repeater 4 wirelessly transmits and receives signals to and from the wireless sensor 3 and transmits a signal received from the wireless sensor 3 to the receiver 5 through wiring. In the first embodiment, the wireless repeater 4 transmits a signal to the receiver 5 via the wireless repeater power supply device 1.

  The receiver 5 performs notification such as a fire alarm based on the signal received from the wireless repeater 4. In the first embodiment, the receiver 5 receives a signal from the wireless repeater 4 via the wireless repeater power supply device 1. The receiver 5 is input with, for example, an AC power supply of 100V. Note that the receiver 5 may be a notification repeater for a fire or the like.

  The power supply device 1 for the wireless repeater supplies power to the wireless repeater 4 and is interposed between the wireless repeater 4 and the receiver 5 so that the signal from the wireless repeater 4 is sent to the receiver 5. Relay. For example, a 100 V AC power supply is input to the wireless repeater power supply device 1, and a standby power supply 14 is also connected thereto. Here, the wireless relay power supply device 1 further includes a power supply voltage monitoring circuit (not shown). The power supply voltage monitoring circuit is connected to a power supply circuit 26 (FIG. 2) to which an AC power supply is input, for example, and measures a voltage output from the power supply circuit 26. Normally, the wireless relay power supply device 1 is driven by power supply based on AC power. When the voltage measured by the power supply voltage monitoring circuit is lower than the predetermined voltage, the wireless relay power supply device 1 is determined to have stopped the power supply based on the AC power supply, and the drive from the AC power supply is changed to the drive by the standby power supply 14. Can be switched. As a result, the wireless relay power supply device 1 is driven by the standby power supply 14.

  The wireless repeater power supply 1 and the wireless repeater 4 are connected by a pair of power supply lines 13, and the wireless repeater power supply 1 uses the power supply line 13 to supply power to the wireless repeater 4. Supply. The wireless repeater power supply device 1 and the wireless repeater 4 are connected by a pair of relay wires 11, and the wireless repeater power supply device 1 uses the relay wires 11 to connect the wireless repeater 4. Sends and receives signals to and from. This signal is, for example, a fire signal received by the wireless repeater 4 from the wireless sensor 3.

  Further, the wireless relay power supply device 1 and the receiver 5 are connected by a pair of reception wirings 12, and the wireless relay power supply device 1 is connected to the receiver 5 using the reception wiring 12. Send and receive signals. This signal is, for example, a fire signal received from the wireless repeater 4 by the wireless repeater power supply device 1. The wireless repeater power supply device 1 has a function of transferring various types of abnormality information to an external device.

  The wireless sensor 3 transmits a fire signal when it detects a fire due to smoke or the like.

  In addition, although not shown, the wireless repeater 4 is normally connected in series with a first switching element that is open and a resistance for adjusting the alarm current (for example, 100Ω) (see FIG. 3). A switching circuit connected in parallel to a relay termination resistor 15) to be described later is provided. This switching circuit has the same configuration as the switching circuit (described later) of the wireless relay power supply device 1. When the wireless repeater 4 receives the fire signal from the wireless sensor 3, the wireless repeater 4 operates the switching circuit by closing the first switching element to adjust the alarm current as fire information (fire signal). It operates so that a substantially short-circuit current based on the resistance of the current flows through the relay wiring 11.

  FIG. 2 is a block diagram showing the wireless relay power supply device 1 according to Embodiment 1 of the present invention. As shown in FIG. 2, the wireless relay power supply device 1 includes a pair of relay terminals 21, a pair of reception terminals 22, a reception disconnection monitoring circuit 23, and a pseudo termination resistor 24. The wireless repeater power supply device 1 further includes a relay disconnection monitoring circuit 25, a power supply circuit 26, a control circuit 27, a power supply terminal 28, a termination terminal 29, an LED 31, and a wiring terminal block 32. .

  The relay terminal 21 is connected to the wireless repeater 4 via the relay wiring 11. The reception terminal 22 is connected to the receiver 5 via the reception wiring 12. The reception disconnection monitoring circuit 23 is connected to the reception terminal 22 and monitors the disconnection (and / or non-connection) of the reception wiring 12. The reception disconnection monitoring circuit 23 determines the disconnection (and / or non-connection) of the reception wiring 12 based on the presence / absence of a current flowing through itself (photocoupler). Connection).

  The pseudo termination resistor 24 is connected between the relay terminals 21 when a disconnection (and / or no connection) of the reception wiring 12 is confirmed in the reception disconnection monitoring circuit 23. The pseudo termination resistor 24 is connected between the relay terminals 21 so that it is simulated as a termination resistor instead of the relay termination resistor 15 (described later) connected to the wireless repeater 4. The pseudo termination resistor 24 is, for example, 10 kΩ. Note that a first switching element 41 that is normally open is connected to the pseudo-termination resistor 24 in series.

  The relay disconnection monitoring circuit 25 is connected between the relay terminals 21 and monitors disconnection of the relay wiring 11. The wireless repeater 4 is connected to a relay termination resistor 15 for detecting disconnection connected to the end of the relay wiring 11 and is, for example, 10 kΩ. The relay disconnection monitoring circuit 25 detects a weak current based on the relay termination resistor 15 flowing in the relay wiring 11 and determines that the relay wiring 11 is disconnected when detecting that the weak current stops flowing. In this way, the relay disconnection monitoring circuit 25 monitors the disconnection of the relay wiring 11. When the disconnection of the relay wiring 11 is confirmed, a relay disconnection alarm (described later) indicating that the relay wiring 11 is disconnected is output.

  The relay disconnection monitoring circuit 25 also has a function of detecting a fire signal received from the wireless repeater 4 and transmitting it to the control circuit 27. Here, the relay disconnection monitoring circuit 25 detects a substantially short-circuit current flowing through the relay wiring 11 based on the switching operation of the wireless repeater 4, and determines that the substantially short-circuit current is flowing, it detects a fire signal. to decide.

  Note that a circuit for detecting a fire signal may be provided as a relay fire monitoring circuit separately from the relay disconnection monitoring circuit 25.

  The power supply circuit 26 is input with power after being transformed by the transformer from the power supplied from the AC power supply. The power supply circuit 26 converts this power into a predetermined power and supplies it to the relay disconnection monitoring circuit 25 and the control circuit 27. Output. The relay disconnection monitoring circuit 25 and the control circuit 27 are configured to be supplied with power also from the standby power supply 14. The control circuit 27 transmits abnormality information or fire information to the receiver 5 based on the signal received from the relay disconnection monitoring circuit 25. In addition, the control circuit 27 transmits the abnormality information or fire information to the LED 31. The pair of power supply terminals 28 are connected to the wireless repeater 4 via the power supply line 13. Note that a fuse is attached to the power supply terminal 28. Further, the wireless repeater power supply device 1 is provided with a panel switch 14a. When the panel switch 14a is pressed, the battery test circuit 14b is driven and a voltage test of the standby power supply 14 is performed.

  The pair of termination terminals 29 are connected to the termination device 16 for detecting disconnection of the reception wiring 12 by the receiver 5. The terminator 16 may be a termination resistor, and the resistance value may be the same as that of the relay termination resistor 15 and the pseudo termination resistor 24, for example, 10 kΩ.

  Between the terminator 16 (termination terminal 29) and the reception wiring 12 (reception terminal 22), the above-described reception disconnection monitoring circuit 23, the second switching element 42 as a disconnection output circuit, and the first as a switching circuit. 3 switching elements 43 and a resistor 44.

  In addition, the part in which the reception disconnection monitoring circuit 23, the second switching element 42, and the third switching element 43 are mounted is insulated from other parts.

  When the relay disconnection monitoring circuit 25 confirms the disconnection of the relay wiring 11, the relay disconnection monitoring circuit 25 transmits the abnormality information (disconnection information) to the control circuit 27. In the case of abnormality information, the control circuit 27 opens the normally closed second switching element 42 connected in series to the terminator 16. Thereby, the abnormality information is transmitted to the receiver 5. That is, as the abnormality information, the reception wiring 12 is disconnected, and a weak current based on the terminator 16 is not passed through the reception wiring 12. At this time, a relay disconnection alarm (described later) indicating that the relay wiring 11 is disconnected is output.

  When the relay disconnection monitoring circuit 25 receives a fire signal or the like from the wireless repeater 4, the relay disconnection monitoring circuit 25 transmits the fire information to the control circuit 27. Then, in the case of fire information, the control circuit 27 closes the normally open third switching element 43 connected in parallel to the terminator 16 and causes the switching circuit to perform a switching operation. Thereby, fire information is transmitted to the receiver 5. The third switching element 43 is connected in series with an alarm current adjusting resistor 44 having a resistance value smaller than that of the terminator 16. A substantially short-circuit current larger than the weak current based on the terminator 16 flows.

  LED31 as a display means displays each information, and has a fire light and a disconnection light. The fire light is displayed in the event of a fire. The disconnection lamp is displayed when disconnection is an example of a relay disconnection alarm.

  The wiring terminal block 32 is a terminal block provided with the relay terminal 21, the reception terminal 22, the power supply terminal 28, and the termination terminal 29.

  Next, in FIG. 1, the receiver 5 is connected to a reception alarm unit (not shown) that outputs a reception disconnection alarm when the disconnection of the reception wiring 12 is confirmed, and the reception wiring 12. And a monitoring circuit (not shown) for monitoring disconnection. When the monitoring circuit detects a weak current based on the terminator 16 flowing in the reception wiring 12 and detects that the weak current stops flowing, the monitoring circuit determines that the reception wiring 12 is disconnected. In this way, the monitoring circuit monitors disconnection of the reception wiring 12. When the disconnection of the reception wiring 12 is confirmed, the reception alarm unit outputs a reception disconnection alarm indicating that the reception wiring 12 is disconnected.

  In the wireless relay power supply device 1, when the relay disconnection monitoring circuit 25 confirms the disconnection of the relay wiring 11, the control circuit 27 operates the disconnection output circuit (opens the second switching element 42) to receive the reception wiring 12. In practice, the monitoring circuit monitors the disconnection of the relay wiring 11 or the reception wiring 12, and the reception alarm unit outputs a reception disconnection alarm indicating that the relay wiring 11 or the reception wiring 12 is disconnected. I can say that. That is, it can be said that the receiver 5 outputs a reception disconnection alarm indicating that the wiring (relay wiring 11 and / or reception wiring 12) between the wireless repeater 4 and the receiver 5 is disconnected as a disconnection alarm. .

  The receiver 5 determines that the fire information has been received when the monitoring circuit (not shown) detects a substantially short-circuit current based on the switching operation of the wireless relay power supply device 1. And the above-mentioned reception warning part (not shown) outputs a reception fire warning.

  Note that the receiver 5 may include a fire monitoring circuit as a monitoring circuit for detecting fire information and a disconnection monitoring circuit as a monitoring circuit for monitoring disconnection of the reception wiring 12 as monitoring circuits.

  Next, the operation of the wireless repeater power supply device 1 will be described. First, the operation when a fire or the like occurs will be described. When the relay disconnection monitoring circuit 25 receives a fire signal or the like from the wireless repeater 4 by detecting a substantially short-circuit current based on the switching operation of the wireless repeater 4, the relay disconnection monitoring circuit 25 displays the fire information. Transmit to the control circuit 27. And the control circuit 27 closes the 3rd switching element 43 in the case of fire information. Thereby, fire information is transmitted to the receiver 5. Further, the control circuit 27 performs a fire display with a fire light of the LED 31.

  On the other hand, when the monitoring circuit (not shown) detects a substantially short-circuit current based on the switching operation of the wireless relay power supply device 1, the receiver 5 determines that the fire information has been received. Then, a reception alarm unit (not shown) outputs a reception fire alarm.

  Next, an operation when the relay wiring 11 is disconnected will be described. As described above, the relay disconnection monitoring circuit 25 detects the weak current based on the relay termination resistor 15 flowing in the relay wiring 11 and determines that the relay wiring 11 is disconnected when detecting that the weak current stops flowing. . When the relay disconnection monitoring circuit 25 confirms the disconnection of the relay wiring 11, the relay disconnection monitoring circuit 25 transmits the abnormality information (disconnection information) to the control circuit 27. And the control circuit 27 opens the 2nd switching element 42 in the case of abnormality information. Thereby, the abnormality information is transmitted to the receiver 5. In addition, the control circuit 27 performs a disconnection display by the disconnection lamp of the LED 31, and outputs a relay disconnection alarm indicating that the relay wiring 11 is disconnected.

  On the other hand, in the receiver 5, when a monitoring circuit (not shown) detects a weak current based on the terminator 16 flowing in the reception wiring 12, and detects that the weak current stops flowing, the reception wiring 12 is disconnected. Judge that there is. When the disconnection of the reception wiring 12 is confirmed, the reception alarm unit (not shown) indicates that the wiring between the wireless repeater 4 and the receiver 5 (in this case, the relay wiring 11) is disconnected. The reception disconnection alarm is output.

  Next, an operation when the reception wiring 12 is disconnected will be described. When the reception wiring 12 is disconnected, the monitoring circuit (not shown) in the receiver 5 detects a weak current based on the terminator 16 flowing in the reception wiring 12 and detects that the weak current stops flowing. Then, it is determined that the reception wiring 12 is disconnected. When the disconnection of the reception wiring 12 is confirmed, the reception alarm unit issues a reception disconnection alarm indicating that the wiring between the wireless repeater 4 and the receiver 5 (in this case, the reception wiring 12) is disconnected. Output.

  FIG. 3 is a block diagram showing the alarm system 2 according to Embodiment 1 of the present invention. Next, the operation of the wireless relay power supply device 1 will be described. As shown in FIG. 3, in the alarm system 2, the wireless repeater 4 and the receiver 5 may be directly connected without going through the wireless repeater power supply device 1. For example, when the configuration of FIG. 1 is changed to the configuration of FIG. 3, the relay wiring 11 and the reception wiring 12 are removed from the wireless relay power supply device 1. Then, by connecting the relay wiring 11 and the reception wiring 12, the wireless relay 4 and the receiver 5 are directly connected without going through the wireless relay power supply device 1. Note that “the relay wiring 11 and the reception wiring 12 are connected” means that the wireless relay 4 and the receiver 5 are directly connected without the wireless relay power supply 1. However, the present invention is not limited to the use of the wiring in the connection form shown in FIG.

  First, when the relay wiring 11 is removed, the relay disconnection monitoring circuit 25 detects the disconnection (non-connection) of the relay wiring 11 and outputs a relay disconnection alarm. However, after that, when the reception wiring 12 is removed, the reception disconnection monitoring circuit 23 detects the disconnection (non-connection) of the reception wiring 12, thereby connecting the pseudo termination resistor 24 between the relay terminals 21. In this way, the pseudo termination resistor 24 is connected between the relay terminals 21 instead of the relay termination resistor 15. Therefore, the occurrence of the relay disconnection alarm is blocked by removing the reception wiring 12.

  In other words, when the reception wiring 12 is removed, the reception disconnection monitoring circuit 23 determines that the reception wiring 12 is disconnected (not connected) because no current flows through the reception disconnection monitoring circuit 23, and the pseudo termination is established between the relay terminals 21. A resistor 24 is connected. Therefore, the relay disconnection monitoring circuit 25 can detect a weak current based on the pseudo termination resistor 24 having an equivalent resistance value instead of the relay termination resistor 15, and therefore does not determine that the relay wiring 11 is disconnected.

  As described above, in the first embodiment (FIG. 3), the pseudo-termination resistor 24 is connected between the relay terminals 21 when the disconnection (non-connection) of the reception wiring 12 is confirmed in the reception disconnection monitoring circuit 23. Even if the relay wiring 11 is disconnected (not connected), the generation of the relay disconnection alarm is blocked. For this reason, when the alarm to the effect that the wiring (relay wiring 11) between the wireless repeater 4 is disconnected is unnecessary, the generation of the alarm to the effect that the wiring has been disconnected can be blocked.

  In the connection configuration of FIG. 3, the receiver 5 determines that the fire information has been received when the monitoring circuit (not shown) detects a substantially short-circuit current based on the switching operation of the wireless repeater 4. In the receiver 5, a monitoring circuit (not shown) detects a weak current based on the relay termination resistor 15 flowing in the wiring (reception wiring 12) between the wireless repeater 4 and the receiver 5, When it is detected that the weak current stops flowing, it is determined that the wiring (reception wiring 12) between the wireless repeater 4 and the receiver 5 is disconnected.

  In the first embodiment, in order to prevent the wireless relay power supply device 1 from alarming the disconnection (non-connection) of the relay wiring 11 in the connection form of FIG. This is performed based on disconnection (non-connection) of the reception wiring 12. Here, if the connection of the pseudo termination resistor 24 is performed based on the disconnection (non-connection) of the relay wiring 11, the original function of notifying the disconnection of the relay wiring 11 in the connection form of FIG. 1 is impaired. . For this reason, in the connection form of FIG. 3, the pseudo termination resistor 24 is connected based on the disconnection (non-connection) of the reception wiring 12. On the other hand, in the case of FIG. 3, the disconnection of the wiring (reception wiring 12) that directly connects the wireless repeater 4 and the receiver 5 is caused by the reception alarm unit of the receiver 5 in the receiver 5 as described above. Receive disconnection alarm is output. For this reason, in FIG. 3, the disconnection of the wiring (reception wiring 12) directly connecting the wireless repeater 4 and the receiver 5 can be confirmed on the receiver 5 side. ) No problem in reporting.

  Conventionally, when the wireless repeater and the receiver are directly connected without using the wireless repeater power supply, a pseudo-termination resistor is separately added to the terminal block provided in the wireless repeater power supply. There is known a technique for cutting off the occurrence of an alarm indicating that a wiring is disconnected when an alarm indicating that the wiring is disconnected is unnecessary. However, this requires a work of attaching a pseudo-termination resistor every time an attempt is made to remove the wireless repeater and the receiver from the wireless repeater power supply device, which is complicated. Moreover, since the pseudo-termination resistor is a member different from the power supply device for the wireless repeater, the pseudo-termination resistor may be lost.

  On the other hand, in the first embodiment, the wireless relay power supply device 1 includes the pseudo termination resistor 24. When the reception wiring 12 is removed, the pseudo termination resistor 24 is automatically connected between the relay terminals 21 by the reception disconnection monitoring circuit 23. For this reason, the operation | work which attaches the pseudo | termination terminal resistance 24 manually is unnecessary, and can reduce an operation man-hour. Further, since the pseudo termination resistor 24 is provided in the wireless relay power supply device 1, the pseudo termination resistor 24 can be prevented from being lost.

  In the connection configuration of FIG. 1, as an operation when the reception wiring 12 is disconnected, the wireless relay power supply device 1 is disconnected by the reception disconnection monitoring circuit 23 because no current flows through the reception wiring monitoring circuit 23. The pseudo-termination resistor 24 is connected to the relay terminal 21 because it is determined that it is (not connected). Therefore, the relay disconnection monitoring circuit 25 is configured to detect a weak current based on the pseudo termination resistor 24 having an equivalent resistance value instead of the relay termination resistor 15, so that even if the relay wiring 11 is disconnected, the relay wiring 11 is not judged to be a disconnection.

  However, in the receiver 5, a monitoring circuit (not shown) detects that the weak current based on the terminator 16 flowing in the reception wiring 12 does not flow, determines that the reception wiring 12 is disconnected, and receives the signal. The alarm unit outputs a reception disconnection alarm indicating that the wiring between the wireless repeater 4 and the receiver 5 (in this case, the reception wiring 12) is disconnected.

  In this way, the receiver 5 side outputs a reception disconnection alarm indicating that one of the wires (either the relay wire 11 or the reception wire 12) between the wireless repeater 4 and the receiver 5 is disconnected. Therefore, after that, each wiring is checked and replaced quickly. Therefore, even if the disconnection of the relay wiring 11 is not detected until the replacement work, there is no problem.

  DESCRIPTION OF SYMBOLS 1 Power supply device for wireless repeaters, 2 Alarm systems, 3 Wireless sensors, 4 Wireless repeaters, 5 Receivers, 11 Relay wires, 12 Receive wires, 13 Power wires, 14 Backup power, 14a Panel switch, 14b Battery Test circuit, 15 relay termination resistor, 16 terminator, 21 relay terminal, 22 reception terminal, 23 reception disconnection monitoring circuit, 24 pseudo termination resistor, 25 relay disconnection monitoring circuit, 26 power supply circuit, 27 control circuit, 28 power supply terminal, 29 Termination terminal, 31 LED, 32 Wiring terminal block, 41 1st switching element, 42 2nd switching element, 43 3rd switching element, 44 Resistance.

Claims (3)

Power is supplied to a wireless repeater that transmits and receives signals to and from the wireless sensor, and is interposed between the wireless repeater and the receiver to receive the signal from the wireless repeater. In the power supply device for a wireless repeater that can be relayed to the machine,
A pair of relay terminals connectable to the wireless repeater via relay wiring;
A receiving terminal connectable to the receiver via a receiving wiring;
A reception disconnection monitoring circuit connected to the reception terminal and monitoring disconnection of the reception wiring;
A pseudo-termination resistor connected between the relay terminals when it is confirmed that the reception wiring is disconnected in the reception disconnection monitoring circuit;
A power supply device for a wireless repeater, comprising: A relay disconnection monitoring circuit connected to the relay terminal and monitoring disconnection of the relay wiring;
A relay alarm unit that outputs a relay disconnection alarm when disconnection of the relay wiring is confirmed in the relay disconnection monitoring circuit;
The power supply device for a wireless repeater according to claim 1, further comprising: The wireless sensor;
The wireless repeater;
The receiver;
A wireless repeater power supply device according to claim 1 or 2,
The receiver
An alarm system, comprising: a reception alarm unit that outputs a reception disconnection alarm when disconnection of the reception wiring is confirmed.

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