JP4075953B2 - Wiring equipment for power line carrier communication - Google Patents

Description

  The present invention relates to a power line carrier communication wiring device for performing data communication using a power line wired to a building such as an office or a house.

In recent years, a local area network (hereinafter abbreviated as “LAN”) in which a plurality of computers are connected is rapidly spreading in offices and houses. A communication cable (a so-called LAN cable) is usually used as a communication medium for connecting computers in such a LAN. However, when a new LAN is introduced into an existing office or house, the labor and cost of wiring work are required. In some cases, a radio system using radio waves is employed in consideration of the above (for example, see Patent Document 1).
JP 2005-79977 A

  Incidentally, power line transmission (Powre Line Communication, hereinafter abbreviated as “PLC”) that performs data communication using a power supply wiring (power line) has been proposed. The PLC is a device (PLC modem) that transmits a PLC communication signal having a higher frequency than the commercial frequency by superimposing it on the power waveform of the commercial frequency and separates and receives the PLC communication signal of the higher frequency from the power waveform. )is required. The PLC modem is connected to an outlet provided on the wall surface via a power cord and is connected to a communication device such as a computer via a communication cable. However, if the PLC modem occupies the outlet, it becomes difficult for the computer and other devices to use the outlet, so that it is difficult to receive the power supply.

  Moreover, since the power line is designed on the assumption that a current of a commercial frequency of 50 Hz or 60 Hz flows, when a PLC communication signal having a high frequency flows, the PLC communication signal radiates to generate radiation noise, It affects other equipment. In particular, in recent years, relaxation of laws and regulations has been studied for the purpose of making it possible to support high-speed communication such as the Internet. Conventionally, in addition to the frequency band of 10 kHz to 450 Hz that can be used in PLC, higher frequency The use of a frequency band of 2 MHz to 30 MHz has been studied. In a high-speed PLC that performs PLC using a communication signal in the frequency band of 2 MHz to 30 MHz, radiation from the power line due to the communication signal of the PLC increases compared to a low-speed PLC that performs PLC using a communication signal in the frequency band of 10 kHz to 450 kHz. .

  Conversely, noise caused by other equipment such as equipment connected to the power line through an outlet or equipment placed near the power line may get on the power line, and countermeasures against such noise are also necessary. is there.

  The present invention has been made in view of the above circumstances, and is a power carrier communication wiring capable of reducing the noise and satisfactorily performing PLC while securing the power supply of other equipment without occupying an existing outlet. The purpose is to provide equipment.

A power line carrier communication wiring device according to the present invention includes a housing that is embedded in a manner that a rear end portion is embedded in an embedded hole provided in a construction surface, and a terminal portion that is provided in the housing and is connected to a power line. A power line carrier communication modem housed in the housing and modulating / demodulating a communication signal for power line carrier communication, and a communication interface housed in the housing and interfacing with the power line carrier communication modem and a communication device; A connector provided on the front surface of the housing, into which a communication cable connecting the communication device and the communication interface is removably inserted, and housed in the housing, the power line carrier communication modem and the terminal portion a common mode choke coil is interposed, to cut off the common mode noise of the power line carrier communication modem between, Is connected to the outlet, a feed line terminal unit for feeding wire power lines, housed in the housing, said interposed between the common mode choke coil and the feed wiring terminal portion, the communication band of the power line communication And the housing is embedded in the construction surface using a mounting frame standardized for an embedded wiring device (Claim 1). .

  According to this configuration, the housing having the connector to which the communication cable can be attached on the front surface and housing the power line carrier communication modem and the like is embedded in the construction surface. The power supply of the equipment can be secured.

  In addition, since a common mode choke coil is interposed between the power line carrier communication modem and the terminal section, it is possible to prevent common mode noise generated in the power line carrier communication modem from flowing out to the power line through the terminal section. Thus, radiation noise can be reduced.

  In addition, since a filter circuit interposed between the common mode choke coil and the feed wiring terminal portion is provided, noise generated in the electrical equipment connected through the feed wiring terminal portion is reduced. Inflow to the power line communication modem via the common mode choke coil is suppressed. As a result, it is possible to reduce the noise while securing the power supply of the other device and to perform the PLC satisfactorily.

  Moreover, since the housing is embedded in the construction surface using a mounting frame standardized for an embedded wiring device, the housing can be easily embedded in the construction surface.

  Preferably, a first switch for turning on / off power supply to the power line communication modem is interposed between the common mode choke coil and the terminal portion.

  According to this configuration, when the use of the power line carrier communication modem is not planned, the standby power of the power line carrier communication modem can be reduced to zero by turning off the first switch.

  Preferably, a second switch is provided in parallel with the filter circuit.

  According to this configuration, when the second switch is turned on, the feed wiring terminal is connected to the power line carrier communication modem via the common mode choke coil without passing through the filter circuit. By connecting a communication device having a carrier communication function, power line carrier communication with the communication device having the power line carrier communication function can be realized.

  The filter circuit preferably cuts off common mode noise and normal mode noise.

  According to this configuration, since the filter circuit blocks common mode noise and normal mode noise, when the electric equipment is connected via the feed wiring terminal, the common mode noise and normal mode generated in the electric equipment are connected. It is suppressed that noise flows into the power line carrier communication modem via the feed wiring terminal portion.

  ADVANTAGE OF THE INVENTION According to this invention, the power supply communication wiring apparatus which can reduce a noise and can perform PLC favorably can be provided, ensuring the power supply of another apparatus, without occupying the existing outlet socket.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, and abbreviate | omits description.

(Embodiment 1)
1A and 1B are diagrams showing an external configuration of a power line carrier communication wiring device A1 according to Embodiment 1, FIG. 1A shows a front view, and FIG. 1B shows a side view. As shown in FIGS. 1 (a) and 1 (b), the power line carrier communication wiring device A1 is embedded and embedded in a manner in which a rear end portion is embedded in an embedded hole (switch box) provided in a construction surface such as a wall surface. A substantially box-shaped housing 1 and a mounting frame 2 attached to the front (front) side of the housing 1. The mounting frame 2 is composed of two mounting frames (mounting frames for large-sized continuous wiring equipment standardized by JIS C 8375) that are attached to two switch boxes standardized by JIS C 8336. The screw is attached to the front surface of the housing 1 in a state of being inserted. A pair of screw insertion holes 2a through which box mounting screws for mounting the housing 1 to the switch box are inserted and a plate 50 (see FIG. 5) to be described later are attached to the upper and lower portions of the mounting frame 2. A pair of screw holes 2b into which the plate screws are screwed are arranged in the left and right directions.

  The housing 1 is formed of a substantially box-shaped synthetic resin molded product, and a connector (RJ-45 modular plug) attached to the tip of a communication cable (CAT5 LAN cable) is detachably connected to the front center. The insertion port 3a of the receiving connector (RJ-45 modular jack 3) is exposed. A display element (light emitting diode) LD is exposed above the insertion port 3a on the front surface of the housing 1. In order to prevent dust and the like from entering when the connector is not inserted into the insertion port 3a, for example, an operation knob protruding forward is opened and closed by a door that is movable in the vertical direction. The insertion port 3a may be configured so as to be freely closed.

  FIG. 2 is a block diagram showing a circuit configuration of the power line carrier communication wiring device A1. 2 is a modular jack 3, a terminal unit 4, a power supply unit 5, a display circuit 11, a common mode choke coil 12, a filter circuit 13, a feed wiring terminal unit 14, and a power line carrier communication. A modem 15 and a communication interface 16 are provided.

  The terminal portion 4 is disposed on the back surface (rear end portion) of the housing 1 facing the front surface of the housing 1, and includes a conventionally known screwless terminal (so-called quick connection terminal), and is a power line wired indoors of the building Is connected. The feed wiring terminal portion 14 is connected to one or a plurality of outlets B (see FIG. 3) via electric wires, and supplies electric power from the power line to the electrical equipment connected to the blade receiver B <b> 1 included in the outlet B.

  The power line carrier communication modem 15 includes at least a coupling circuit 6, a transmission / reception unit 7, and a modem 8, and modulates and demodulates a communication signal for power line carrier communication. The coupling circuit 6 includes capacitors C1 and C2 and an insulating transformer T. Capacitors C1 and C2 are capacitors that cut commercial power supply frequency (power supply component). The isolation transformer T has a primary side connected to the common mode choke coil 12 via capacitors C1 and C2, and a secondary side connected to the transmission / reception unit 7.

  The transmission / reception unit 7 is connected between the coupling circuit 6 and the modem 8 and is connected to the secondary side of the isolation transformer T so as to transmit a power line carrier communication signal to the power line (hereinafter referred to as a communication signal). Send and receive. That is, the transmission / reception unit 7 converts the communication signal output from the coupling circuit 6 into a signal form suitable for reception by the modem 8 and outputs the reception signal RX to the modem 8 as a reception signal RX, and output from the modem 8. A transmission circuit 7b that converts the transmission signal Tx into a signal form for power line carrier communication and outputs the signal to the coupling circuit 6 is provided.

  The modem 8 has a demodulation function for demodulating a data signal from a communication signal in a predetermined format transmitted by being superimposed on the power line, and a modulation function for modulating transmission data on the side of a communication device such as a computer into a communication signal in a predetermined format.

  Thus, the power line carrier communication modem 15 including at least the coupling circuit 6, the transmission / reception unit 7, and the modem 8 is configured, and a PLC communication signal having a frequency higher than the commercial frequency is superimposed on the power waveform of the commercial frequency and transmitted. At the same time, the communication signal of the high frequency PLC is separated from the power waveform and received.

  The communication interface 16 includes a LAN controller 9 and a control circuit 10. The LAN controller 9 performs data transmission based on a standard such as 100BASE-TX with a communication device via a communication cable connected to the modular jack 3. The control circuit 10 includes a CPU as a main component, and a security function such as filtering of data (packets) exchanged between the modem 8 and the LAN controller 9 and a display circuit 11 for informing that data transmission is in progress. It has a function of controlling and causing the display element LD included in the display circuit 11 to emit light.

  The modular jack 3 is a connector conforming to a standard such as RJ45, and is connected to a communication device via a communication cable.

  The display circuit 11 is composed of the display element LD shown in FIG. 1 and emits information, blinks, etc. under the control of the control circuit 10 to notify information that data is currently being transmitted.

  The power source unit 5 generates a DC power source from a commercial AC power source that is fed from the power line through the terminal unit 4 and the common mode choke coil 12, and transmits / receives the unit 7, modem 8, LAN controller 9, control circuit 10, and display circuit DC power is supplied to each circuit such as 11. Specifically, the power supply unit 5 includes an impedance upper circuit 5a having a high impedance with respect to a PLC frequency band (for example, 2 MHz to 30 MHz) and a power supply circuit 5b formed of an AC-DC converter.

  The common mode choke coil 12 is interposed between the terminal unit 4 and the power line carrier communication modem 15 (specifically, between the terminal unit 4 and the coupling circuit 6). Blocks mode noise. Thereby, the common mode noise generated in the power line carrier communication modem 15 is suppressed from flowing out to the power line, and the radiation noise is reduced.

  The filter circuit 13 is interposed between the feed wiring terminal portion 14 and the common mode choke coil 12, and cuts off the PLC communication band (for example, 2 MHz to 30 MHz). Thereby, it is suppressed that the noise which arose in the electric equipment electrically connected to the terminal part 14 for sending wirings flows into the modem 15 for power line carrier communication. The filter circuit 13 has a function of blocking common mode noise and a function of blocking normal mode noise. The function of blocking the common mode noise can be realized by providing the filter circuit 13 with a common mode choke coil. Further, the function of blocking normal mode noise is configured by a coil, a resistor, a capacitor, and the like, and can be realized by providing the filter circuit 13 with a filter that blocks normal mode noise.

  FIG. 3 is a view showing a state in which the power line carrier communication wiring device A1 is embedded in the embedding hole together with the outlet B. The outlet B is attached by connecting one module of a large-angle continuous wiring apparatus (see JIS C 8304) to one mounting frame (see JIS C 8375). The outlet B is provided with a blade receiver B1. The plate 50 includes a plate frame (not shown) fixed to the mounting frame 2 to which the power line carrier communication wiring device A1 and the three outlets B are attached by a plate screw, and the power line carrier communication wiring device A1. Window holes 51a and 51b exposing the front surface of the housing 1 and the front surface of the outlet B are formed, and the decorative plate 51 is attached to the plate frame so as to cover the front surface of the plate frame.

  Here, the outlet B includes a terminal portion for connecting a power line for indoor wiring and a feed wiring terminal portion for feeding and wiring the power line. Of the three outlets B, for example, the terminal part of the upper outlet B is connected to the feed wiring terminal part 14 of the power line carrier communication wiring device A1. Further, the terminal portion of the middle outlet B is connected to the feed wiring terminal portion of the upper outlet B. Further, the terminal portion of the lower-stage outlet B is connected to the feed wiring terminal portion of the middle-stage outlet B. Thereby, the power from the power line is supplied to the three outlets B.

  As described above, according to the power line carrier communication wiring device A1 of the first embodiment, since the terminal portion 4 is connected to the power line on the back side of the construction surface (wall surface), the outlet B is occupied for connection with the power line. Power communication can be performed.

  Further, since the common mode choke coil 12 is interposed between the power line carrier communication modem 15 and the terminal unit 4, common mode noise generated in the power line carrier communication modem 15 is transmitted to the power line via the terminal unit 4. Outflow is suppressed and radiation noise can be reduced.

  In addition, since the filter circuit 13 is provided between the common mode choke coil 12 and the feed wiring terminal portion 14, noise generated in the electrical equipment connected through the feed wiring terminal portion 14 can be transmitted. Inflow to the power line carrier communication modem 15 via the wiring terminal portion 14 and the common mode choke coil 12 is suppressed, and noise can be reduced while ensuring the power supply of other devices, thereby enabling a good PLC.

  Moreover, since the common mode choke coil 12 and the filter circuit 13 are provided, it is possible to provide a power line carrier communication wiring device that is particularly suitable for a high-speed PLC.

(Embodiment 2)
Next, a power line carrier communication wiring device A2 according to Embodiment 2 of the present invention will be described. FIG. 4 shows a block diagram of a power line carrier communication wiring device A2 according to the second embodiment. FIG. 5 is a view showing a state in which the power line carrier communication wiring device A2 is embedded in the embedding hole together with the outlet B. The power line carrier communication wiring device A2 according to the second embodiment is the same as the power line carrier communication wiring device A1 according to the first embodiment, except that the switch unit 17 (first switch) is provided between the common mode choke coil 12 and the terminal unit 4. Is connected. The switch unit 17 includes a switch S11 connected to the line L1, a switch S12 connected to the line L2, and a knob S13 shown in FIG. The line L1 connects the common mode choke coil 12 and the terminal portion 4. The line L2 connects the common mode choke coil 12 and the terminal portion 4. The knob S13 is disposed on the front surface of the housing 1 so as to be slidable in the left-right direction. For example, when the knob S13 is slid to the left, both the switches S11 and S12 are turned off. When the knob S13 is slid to the right, for example, both the switches S11 and S12 are turned on.

  When the switches S11 and S12 are turned off, the power supply from the power line to the power line carrier communication modem 15 side is cut off. When the switches S11 and S12 are turned on, the power from the power line is sent to the power line carrier communication modem 15 side. Supplied.

  As described above, since the power line carrier communication wiring device A2 according to the second embodiment includes the switch unit 17, the switch unit 17 is turned off when the user does not plan to use the power line carrier communication modem 15. By doing so, the standby power of the power line carrier communication modem 15 can be made zero.

(Embodiment 3)
Next, a power line carrier communication wiring device A3 according to Embodiment 3 of the present invention will be described. FIG. 6 shows a block diagram of a power line carrier communication wiring device A3 according to the third embodiment. Further, the external configuration of the power line carrier communication wiring device A3 is the same as that in FIG. It is the same.

  The power line carrier communication wiring device A3 according to the third embodiment is characterized in that, in the power line carrier communication wiring device A1 according to the first embodiment, a switch unit 18 (second switch) is connected in parallel with the filter circuit 13. To do. The switch unit 18 includes a switch S21 connected to the line L3, a switch S22 connected to the line L4, and a knob S23 shown in FIG. The line L3 branches from the line L1 at the connection point P1, and connects the connection point P1 and the feed wiring terminal portion 14. The line L4 branches from the line L2 at the connection point P2, and connects the connection point P2 and the feed wiring terminal portion 14. Note that the configuration in which the switch unit 18 is turned on and off is the same as that of the switch unit 17, and thus the description thereof is omitted.

  When the switches S21 and S22 are turned on, the feed wiring terminal portion 14 is connected to the power line carrier communication modem 15 via the common mode choke coil 12 without passing through the filter circuit 13. Therefore, by turning on the switches S21 and S22 and connecting a communication device having a power line carrier communication function to the feed wiring terminal portion 14, it is possible to realize power line carrier communication with a communication device having the power line carrier communication function. .

  The power line carrier communication wiring device according to the present invention may include both the switch unit 17 shown in the second embodiment and the switch unit 18 shown in the third embodiment. In this case, as shown in FIG. 7, a switch portion 17 and a switch portion 18 may be provided on the front surface of the housing 1.

It is a figure which shows the external appearance structure of wiring apparatus A1 for power line carrier communication by Embodiment 1, FIG. 1 (A) shows a front view, FIG.1 (B) shows a side view. It is a block diagram which shows the circuit structure of wiring apparatus A1 for power line carrier communication. It is the figure which showed the state which carried out wiring arrangement | positioning A1 for electric power line conveyance communication with the receptacle B with the receptacle B. FIG. The block diagram of wiring apparatus A2 for power line carrier communication by Embodiment 2 is shown. It is the figure which showed the state which carried out wiring arrangement | positioning A2 for electric power line conveyance communication with the receptacle B with the receptacle B. FIG. The block diagram of wiring apparatus A3 for power line carrier communication by Embodiment 3 is shown. It is the figure which showed the aspect which combined Embodiment 2 and Embodiment 3. FIG.

Explanation of symbols

A1, A2, A3 Power line carrier communication wiring device 1 Housing 2 Mounting frame 3 Modular jack 4 Terminal unit 5 Power supply unit 6 Coupling circuit 7 Transmission / reception unit 7a Reception circuit 7b Transmission circuit 8 Modem 9 LAN controller 10 Control circuit 11 Display circuit 12 Common Mode choke coil 13 Filter circuit 14 Feed wiring terminal section 15 Power line carrier communication modem 16 Communication interface 17 Switch section 18 Switch sections S11, S12 Switches S21, S22 Switch

Claims (4)

A housing embedded and disposed in a manner to embed a rear end in an embedded hole provided in the construction surface;
A terminal portion provided in the housing and connected to a power line;
A power line carrier communication modem that is housed in the housing and modulates and demodulates a communication signal for power line carrier communication;
A communication interface housed in the housing and performing an interface between the power line carrier communication modem and a communication device;
A connector provided on the front surface of the housing, into which a communication cable for connecting the communication device and the communication interface is removably inserted;
A common mode choke coil housed in the housing, interposed between the power line carrier communication modem and the terminal, and blocking common mode noise of the power line carrier communication modem;
A feed wiring terminal connected to an electrical outlet and feeding power lines ;
A filter circuit that is housed in the housing, interposed between the common mode choke coil and the feed wiring terminal, and cuts off a communication band of power line carrier communication,
The power line carrier communication wiring apparatus, wherein the housing is embedded in a construction surface using a mounting frame standardized for an embedded wiring apparatus.   2. The power line carrier communication wiring device according to claim 1, wherein a first switch for turning on and off power supply to the power line carrier communication modem is interposed between the common mode choke coil and the terminal portion. .   The power line carrier communication wiring device according to claim 1, wherein a second switch is provided in parallel with the filter circuit. The wiring device for power line carrier communication according to any one of claims 1 to 3, wherein the filter circuit blocks common mode noise and normal mode noise.

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