JP2004228858A - Photoelectric conversion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photoelectric conversion device which can be reduced in size by securing a drive power without possessing a power supply connection outlet. <P>SOLUTION: A drive power is fed to the photoelectric conversion device through the core wires of an electric signal cable which are not used for electric signals, so that a power supply is not required to possess a power supply connection outlet for receiving a drive power from an AC power supply through a power supply cable, the photoelectric conversion device is not equipped with the power supply connection outlet and the power supply cable, and the photoelectric conversion device can be diminished in size. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a photoelectric conversion device that receives an electric signal from an electric signal cable and converts it into an optical signal, while receiving an optical signal from an optical fiber cable and converts it into an electric signal. The present invention relates to a photoelectric conversion device that does not require a connection port.
[0002]
[Prior art]
In a 10base-T, 100base-TX LAN system, the RJ45 type jack uses only four of the eight metal terminals to be connected and does not use the remaining four metal terminals. Therefore, in the metallic cable, the core wire corresponding to the metal terminal not used in the RJ45 type jack was not used. A conventional photoelectric conversion device is provided with an RJ45 type jack for a metallic cable and a jack for an optical fiber cable, a metallic cable connector is connected to the metallic cable jack, and an optical fiber connector is connected to the optical fiber cable jack. And converts the electrical signal from the metallic cable into an optical signal, converts the optical signal from the optical fiber cable into an electrical signal, and the power supply for these conversion operations is provided by a separate power supply. Power was supplied from a power source such as a home AC power supply through a power cord through the mouth.
[0003]
[Problems to be solved by the invention]
The conventional photoelectric conversion device is configured as described above, and requires three interfaces of a metallic cable jack, an optical fiber cable jack, and a power supply connection port as interfaces, and the space for these three interfaces is reduced. As a drawback, there is a problem that the size cannot be reduced, and it is not possible to sufficiently satisfy the current requirements of the optical fiber environment which must be additionally built in existing facilities and the like.
[0004]
SUMMARY An advantage of some aspects of the invention is to provide a photoelectric conversion device that can be reduced in size by securing driving power without having a power supply connection port.
[0005]
[Means for Solving the Problems]
The optical-electrical conversion device according to the present invention is configured to connect an electric signal cable having a plurality of core wires and an optical fiber cable, receive an electric signal via the electric signal cable, convert the received electric signal into an optical signal, and convert the optical fiber cable into an optical signal. In the opto-electric conversion device, which receives an optical signal through the optical fiber cable, converts the optical signal into an electric signal, and sends the electric signal through the electric signal cable, The drive power is supplied via a core wire that is not used for transmitting and receiving electric signals. As described above, in the present invention, since the driving power is supplied through the core wire of the electric signal cable that is not used for the electric signal, the power supply unit has a power supply connection port separately. As a result, the photoelectric conversion device can be downsized without having a power supply connection port and a power supply cable because it does not receive driving power from an AC power supply via a power supply cable.
[0006]
The optical-electrical conversion device according to the present invention is connected to an electric signal cable and an optical fiber cable having a plurality of core wires, receives an electric signal via the electric signal cable, converts the signal into an optical signal, and converts the optical fiber cable. In the opto-electric conversion device, which receives an optical signal through the optical fiber cable, converts the optical signal into an electric signal, and sends the electric signal through the electric signal cable, The four-core wire is used as a core wire for transmitting and receiving electric signals, and the two or four-core wire is used as a core wire for receiving supply of driving power.
[0007]
In the photoelectric conversion device according to the present invention, the core wire for transmitting and receiving the electric signal and the core wire for receiving the supply of the driving power are formed as separate cables. As described above, in the present invention, since the core wire for transmitting and receiving the electric signal and the core wire for receiving the supply of the driving power are separately provided, the driving wire supplied via the core wire for receiving the supply of the driving power is separately provided. The electric power does not adversely affect the electric signal transmitted and received through the core for transmitting and receiving the electric signal.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
(First embodiment of the present invention)
A photoelectric conversion device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall perspective view of the photoelectric conversion device according to the present embodiment, FIG. 2 is a general block diagram of the photoelectric conversion device according to the present embodiment, and FIG. 3 is a network in which the photoelectric conversion device according to the present embodiment is introduced. FIG.
[0009]
The photoelectric conversion device 1 according to the present embodiment converts an electrical signal from the RJ45 type jack 11 for a metallic cable, a jack 12 for an optical fiber cable, and the metallic cable 2 into an optical signal, and converts the optical signal from the optical fiber cable 71 into an optical signal. It comprises a photoelectric conversion unit 13 for converting a signal into an electric signal, and a power supply unit 14 for supplying electric power to various parts of the photoelectric conversion unit 13, and includes a metallic cable 2 mounted on the RJ45 type jack 11 for a metallic cable. In this configuration, driving power is supplied via a core wire that is not used for transmitting and receiving electric signals among the plurality of core wires.
[0010]
It is assumed that the metallic cable 2 can be used on a 10base-T, 100base-TX LAN system and has a 4-to-8-core wire. Here, on a general 100 base-TX LAN system, four cores out of eight cores are used for electric signals (hereinafter, these four cores are referred to as electric signal cores 21), and the remaining four cores are used. Absent. In the present embodiment, supply of drive power is realized via two core wires of the remaining four core wires of the metallic cable 2 (hereinafter, these two core wires are referred to as drive power core wires 22). However, in FIG. 1, the driving power supplied through the driving power core wire 22 is divided into an electric signal core wire 21 and a driving power core wire 22 and is supplied to the electric signal on the electric signal core wire 21. Although the influence is suppressed, it is also possible to form a single piece.
[0011]
The metallic cable RJ45 type jack 11 includes eight metal terminals corresponding to the eight core wires, and four metal terminals (hereinafter referred to as “electrical terminals”) of the eight metal terminals corresponding to the electrical signal core wires of the metallic cable 2. The signal metal terminal 11a) is connected to the photoelectric conversion unit 13, and two metal terminals (hereinafter referred to as drive power metal terminals 11b) corresponding to the drive power core wire of the metallic cable 2 and not the electrical signal metal terminal 11a are provided. 2 (see FIG. 2, in which a solid line connecting the RJ45 type jack 11 for a metallic cable, the photoelectric conversion unit 13 and the power supply unit 14 indicates an electric signal line, and a dotted line indicates a power line). The solid line connecting the optical fiber cable jack 12 and the photoelectric conversion unit 13 indicates an optical signal line.)
[0012]
Next, the operation of the photoelectric conversion device according to the present embodiment will be described. Here, it is assumed that the photoelectric conversion device according to the present embodiment is incorporated in the network system shown in FIG.
In this network system, a plurality of terminals 3 and a switching hub 4 are connected via a metallic cable 5, a switching hub 4 and the photoelectric conversion device 1 are connected via a metallic cable 2, 1 and a conventional photoelectric conversion device 6 are connected via an optical fiber network 7. The metallic cable connector 2a is attached to the metallic cable RJ45 type jack 11, and the optical fiber cable connector 71a is attached to the optical fiber cable jack 12. Here, the metallic cable connector 2a has a shape attachable to the RJ45 type jack 11 for metallic cable, and the core wire of the metallic cable 2 is appropriately attached to each metal terminal of the RJ45 type jack 11 for metallic cable. Make contact.
[0013]
In the switching hub 4, similarly to the photoelectric conversion device according to the present embodiment, the metallic cable jack 12 connected to the photoelectric conversion device 1 includes eight metal terminals corresponding to the eight core wires of the metallic cable 2. Corresponding to the electric signal core wire of the metallic cable 2, four of the eight metal terminals (hereinafter, electric signal metal terminals) are connected to a circuit unit (not shown) that realizes a switching function and the like, Two metal terminals that are not metal terminals for electric signals (hereinafter, metal terminals for driving power) corresponding to the driving power core wires of the metallic cable 2 are connected to a power supply unit (not shown). Here, the power supply unit of the switching hub 4 receives power supply from the AC power supply 8, supplies power to each part, and supplies power to the power metal terminal. Here, the power supplied to the photoelectric conversion device 1 is not limited to the switching hub 4 but may be another type of hub (such as a repeater hub) or a router, and a metallic cable capable of securing a core wire for driving power may be used. Any device can be used as long as the device is connected via a power supply and can supply power.
[0014]
In this network system, data from a terminal 3 is transmitted as an electric signal to a switching hub 4 via a metallic cable 5, and the switching hub 4 checks the destination of the data and transmits the data to the photoelectric conversion device 1 to the metallic cable 2. , And the data from the photoelectric conversion device 1 is transmitted via the optical fiber network 7 to the photoelectric conversion device 6 serving as a gateway of the network to which the data transmission destination belongs. Regardless of the case where such data communication is performed, power from the switching hub 4 is supplied from the driving power core wire 22 of the metallic cable 2 in response to a request from the photoelectric conversion device 1.
[0015]
As described above, according to the photoelectric conversion device according to the present embodiment, the photoelectric conversion device 1 is provided with the driving power metal terminal 11b in addition to the electric signal metal terminal 11a of the metallic cable jack 12, and the metallic cable 2 Since the drive power is supplied from the drive power core 22, the transmission and reception of data from the switching hub 4 is performed via the electrical signal core 21 of the metallic cable 2, and the photoelectric conversion device 1 is used as needed. The power supply unit 14 receives the drive power via the drive power core wire 22 of the metallic cable 2, and the power supply unit 14 has a power supply connection port and receives the drive power directly from the AC power supply via the power cable. Therefore, the photoelectric conversion device 1 can be reduced in size without having a power supply connection port and a power cable.
[0016]
In the photoelectric conversion device according to the present embodiment, as shown in FIG. 4, the metallic cable jack 12 and the optical fiber cable jack 13 can be disposed to face each other. By adopting a shape according to the environment in which it is deployed, an environment for optical communication can be constructed in a small space.
[0017]
【The invention's effect】
As described above, in the present invention, since the driving power is supplied via the core wire of the electric signal cable which is not used for the electric signal, the power supply unit has a power supply connection port separately. As a result, since the driving power is not received from the AC power supply via the power cable, the photoelectric conversion device can be downsized without having a power supply connection port and a power cable.
[0018]
Further, in the present invention, since the core wire for transmitting and receiving the electric signal and the core wire for receiving the drive power are separately provided, the drive power supplied via the core wire for receiving the drive power is provided. Has the effect that the electric signal transmitted and received via the core wire for transmitting and receiving the electric signal is not adversely affected.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a photoelectric conversion device according to a first embodiment of the present invention.
FIG. 2 is an overall block diagram of the photoelectric conversion device according to the first embodiment of the present invention.
FIG. 3 is a network configuration diagram in which the photoelectric conversion device according to the first embodiment of the present invention is introduced.
FIG. 4 is an overall perspective view of a photoelectric conversion device according to another embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 1 photoelectric conversion device 2 metallic cable 2a metallic cable connector 3 terminal 4 switching hub 5 metallic cable 6 conventional photoelectric conversion device 7 optical fiber network 8 AC power supply 11 RJ45 type jack 11a for metallic cable 11a metal terminal 11b for electric signal driving power Metal terminal 12 Optical fiber cable jack 13 Photoelectric conversion unit 14 Power supply unit 21 Electrical signal core wire 22 Drive power core wire 71 Optical fiber cable 71a Optical fiber cable connector

Claims (3)

An electric signal cable having a plurality of cores and an optical fiber cable are connected, an electric signal is received through the electric signal cable, converted into an optical signal, and sent through the optical fiber cable. In a photoelectric conversion device that receives an optical signal through a cable, converts the signal into an electric signal, and sends the signal through the electric signal cable,
An opto-electrical converter, comprising: receiving a supply of drive power via a core wire of the plurality of core wires of the electrical signal cable that is not used for transmitting and receiving an electrical signal. Connected to an electric signal cable and an optical fiber cable having a plurality of core wires, receive an electric signal through the electric signal cable, convert the electric signal into an optical signal, and send the optical signal through the optical fiber cable; In a photoelectric conversion device that receives an optical signal through a cable, converts the signal into an electric signal, and sends the signal through the electric signal cable,
The photoelectric conversion device according to claim 1, wherein four core wires of the plurality of core wires of the electrical signal cable are used as core wires for transmitting and receiving electric signals, and two or four core wires are used as core wires for receiving supply of driving power. The photoelectric conversion device according to claim 1 or 2,
A photoelectric conversion device, wherein a core wire for transmitting and receiving the electric signal and a core wire for receiving supply of driving power are formed as separate cables.

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