WO2014170944A1 - Communication adapter - Google Patents

Communication adapter Download PDF

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Publication number
WO2014170944A1
WO2014170944A1 PCT/JP2013/061205 JP2013061205W WO2014170944A1 WO 2014170944 A1 WO2014170944 A1 WO 2014170944A1 JP 2013061205 W JP2013061205 W JP 2013061205W WO 2014170944 A1 WO2014170944 A1 WO 2014170944A1
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WO
WIPO (PCT)
Prior art keywords
communication
cable
cable connector
communication unit
connection
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Application number
PCT/JP2013/061205
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French (fr)
Japanese (ja)
Inventor
専 梶野
Original Assignee
三菱電機株式会社
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Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2013534514A priority Critical patent/JP5420121B1/en
Priority to PCT/JP2013/061205 priority patent/WO2014170944A1/en
Priority to TW102138867A priority patent/TW201440350A/en
Publication of WO2014170944A1 publication Critical patent/WO2014170944A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/06—Cable ducts or mountings specially adapted for exchange installations

Definitions

  • the present invention relates to a communication adapter that relays a communication unit and a communication cable.
  • a so-called daisy chain connection in which a plurality of devices are connected in series may be employed in a communication system based on serial communication such as EIA-485.
  • Two communication cables are connected to the communication units connected by the daisy chain method.
  • One communication cable and a terminating resistor are connected to the communication unit that is the communication end.
  • the communication unit and the communication cable are connected using, for example, a terminal block.
  • a communication cable As a communication cable, a cable that is a dedicated product prepared according to the type of communication or a cable with the same specifications as the dedicated product may be recommended.
  • a shielded cable including a shielded wire is used as the communication cable. The shield wire is twisted and then subjected to terminal processing, and is connected to the terminal block like the other signal wires of the communication cable.
  • Each terminal block is mounted with a frame ground (FG) terminal in addition to a terminal to which a signal line of a communication cable is connected and a terminal to which a shield line is connected.
  • FG frame ground
  • connection method using this terminal block there is a problem that the wiring around the connection portion between the communication cable and the terminal block increases.
  • the number of wirings is increased, work in changing the arrangement of communication units, exchanging communication cables, and the like becomes complicated, and the maintainability of the communication system is lowered.
  • by using a dedicated cable for specific communication as the communication cable it is necessary to exchange the communication cable to change to another communication method.
  • Patent Document 1 discloses a configuration method in which an adapter having three connectors is used for daisy chain connection.
  • Patent Documents 2 and 3 disclose an apparatus including a plurality of standard connectors.
  • JP 2004-70422 A JP-A-11-27405 JP-A-9-129328
  • Patent Document 1 does not clearly indicate whether or not to use a standard product as a connector.
  • the connection of communication cables, connectors, and shield wires inside the device is not clarified. According to the prior art, it is difficult to realize the mounting of the communication cable by simple work and the simplification of the wiring around the portion to which the communication cable is connected.
  • the present invention has been made in view of the above, and enables mounting of a communication cable by simple work and simplification of wiring around a portion to which the communication cable is connected, and obtains high maintainability.
  • the purpose is to obtain a communication adapter.
  • the present invention is a communication adapter that relays a communication unit and a communication cable in a communication network using a daisy chain connection, and can be attached to a standardized connector.
  • a first cable connector and a second cable connector corresponding to the communication cable including a plug and a connection line are mounted, and the communication cable is connected to each of the first cable connector and the second cable connector.
  • the first cable from a conductive wire constituting a path and a connection line provided in the communication unit A conductive path that forms a connection path leading to the shield attached to the connector and a connection path leading from the connection line included in the communication unit to the shield attached to the second cable connector.
  • the communication adapter includes the first cable connector and the second cable connector corresponding to the standard product, so that the communication cable that can be attached to the standardized connector can be connected by a simple operation. .
  • the signal line of the communication cable is connected to the communication unit side through a conducting wire with a simple configuration.
  • the connection line included in the communication cable is connected to the connection line included in the communication unit via the shield and the conductive line of each of the first cable connector and the second cable connector.
  • the serial communication adapter can reduce the number of man-hours compared to the case where it is necessary to attach the communication cable to the terminal for each signal line or to attach the connection line to the terminal.
  • the serial communication adapter can simplify the wiring at the connection portion with the communication cable.
  • the wiring can be reduced, the work in changing the connection of the communication unit or exchanging the communication cable can be simplified, and high maintainability can be obtained.
  • the communication adapter is a communication method change between communications that can use the same type of general-purpose shielded multicore cable, it is possible to eliminate the need to replace the communication cable. As a result, it is possible to attach the communication cable by a simple work, simplify the wiring around the portion to which the communication cable is connected, and obtain high maintainability.
  • FIG. 1 is a diagram showing a schematic configuration of a communication system including a serial communication adapter that is a communication adapter according to an embodiment of the present invention.
  • FIG. 2 is a plan view of the adapter on the side where the cable connector and the FG terminal are mounted.
  • FIG. 3 is a diagram illustrating a state in which a communication cable and an FG line are connected to the adapter illustrated in FIG.
  • FIG. 4 is a diagram illustrating an example of electrical connection of a communication unit, an adapter, and a communication cable.
  • FIG. 5 is a diagram illustrating a schematic configuration of a communication system including a conventional terminal block.
  • FIG. 6 is a plan view of the terminal block on the side where various terminals for cable connection and the FG terminal are mounted.
  • FIG. 7 is a diagram showing a state where the communication cable and the FG line are connected to the terminal block shown in FIG.
  • FIG. 1 is a diagram showing a schematic configuration of a communication system including a serial communication adapter that is a communication adapter according to an embodiment of the present invention.
  • the communication system is a communication system based on EIA-485, for example.
  • the communication system constitutes a communication network in a sequence system, for example.
  • the communication system includes a plurality of communication units 1.
  • the plurality of communication units 1 are connected in series by a daisy chain method.
  • the communication system constitutes a communication network by daisy chain connection.
  • the plurality of communication units 1 transmit and receive data by serial communication via the communication cable 3.
  • the communication cable 3 has plugs 8 at both ends that can be attached to standardized connectors.
  • the communication cable 3 includes a shield wire that is a connection wire inside.
  • the communication cable 3 is a general-purpose shielded multicore cable. As the communication cable 3, for example, a category 5e compatible STP cable is used.
  • the connecting wire is a shielded wire or any conductive wire.
  • the adapter 2 functions as a serial communication adapter that relays between the communication unit 1 and the communication cable 3.
  • the adapter 2 is attached to each communication unit 1.
  • the adapter 2 is attached to the communication unit 1 via the communication unit connection connector 9.
  • the adapter 2 has two cable connectors 5 and 6 and a frame ground (FG) terminal 7 mounted thereon.
  • the cable connector 5 is a first cable connector.
  • the cable connector 6 is a second cable connector.
  • FIG. 2 is a plan view of the adapter on the side where the cable connector and the FG terminal are mounted.
  • FIG. 3 is a diagram illustrating a state in which a communication cable and an FG line are connected to the adapter illustrated in FIG.
  • the cable connectors 5 and 6 have a configuration compatible with the communication cable 3.
  • the cable connectors 5 and 6 are configured so that the plug 8 of the communication cable 3 can be fitted therein.
  • the two cable connectors 5 and 6 have the same configuration.
  • a shield 10 is attached to the cable connectors 5 and 6.
  • Each of the shield 10 attached to the cable connector 5 and the shield 10 attached to the cable connector 6 can be connected to a shield line that is a connection line included in the communication cable 3.
  • standard connectors such as shielded RJ-45 connectors are used.
  • the communication cable 3 is connected to a cable connector 5 on one side of the two communication units 1 and a cable connector 6 on the other side.
  • the communication cable 3 is connected to both of the cable connectors 5 and 6.
  • the communication cable 3 is connected to one of the cable connectors 5 and 6, and the termination resistor 4 is connected to the other.
  • FG line is connected to the FG terminal 7.
  • the housing of the communication unit 1 is grounded via the FG terminal 7 and the FG line.
  • the FG line is connected to, for example, a screw tightening type FG terminal 7.
  • FIG. 4 is a diagram showing an example of electrical connection of a communication unit, an adapter, and a communication cable.
  • the connection about the communication unit 1, the adapter 2, the communication cable 3, and the FG terminal 7 in CC-Link (Control & Communication Link) (registered trademark) is taken as an example.
  • the cable connectors 5 and 6 include the same number of pins 11 and 12 as the core wires to be connected between the communication cable 3 and the communication unit 1 in the communication network or more than the core wires to be connected.
  • the adapter 2 includes an internal signal line 14, an internal shield line 15, and an internal FG line 16.
  • the internal signal line 14 is a conducting wire constituting a connection path from the communication unit 1 side to the pin 11 in the cable connector 5 and a connection path from the communication unit 1 side to the pin 12 in the cable connector 6.
  • the adapter 2 includes the same number of internal signal lines 14 as the core wires to be connected between the communication cable 3 and the communication unit 1 in the communication network.
  • Each internal signal line 14 is branched, for example, from a midway position in the path connecting the pin 13 in the communication unit connection connector 9 and the pin 11 in the cable connector 5 to the pin 12 in the cable connector 6. Make a branch connection.
  • the internal shield line 15 is attached to the cable connector 6 from the shield (SLD) line, which is a connection line included in the communication unit 1, to the shield 10 attached to the cable connector 5, and from the SLD line included in the communication unit 1. It is a conducting wire constituting a connection path to the shield 10.
  • SLD shield
  • the internal shield wire 15 is, for example, a branch connection in which a conductor leading from the middle position of the conductor connecting the SLD line in the communication unit 1 and the shield 10 in the cable connector 5 to the shield 10 in the cable connector 6 is branched. Eggplant.
  • the internal FG line 16 is a conducting wire that connects the FG line in the communication unit 1 and the FG terminal 7.
  • the communication unit 1 includes signal lines DA, DB, DG, NC, NC, SLD lines, and FG lines.
  • the communication cable 3 includes signal lines DA, DB, DG, NC, NC, NC, NC, NC, NC, and two SLD lines. The two SLD lines are bundled together in the communication cable 3, for example, before the plug 8.
  • the DA, DB, and DG lines of the communication cable 3 are connected to the pins 11, respectively.
  • the end of the internal signal line 14 on the cable connector 5 side is connected to a pin 11 to which each line of DA, DB, and DG is connected.
  • the DA, DB, and DG lines of the communication cable 3 are connected to the pins 12, respectively.
  • the end of the internal signal line 14 on the cable connector 6 side is connected to a pin 12 to which each line of DA, DB, and DG is connected.
  • an internal signal line 14 is connected to each of the pins 13 to which the DA, DB, and DG lines in the communication unit 1 are connected.
  • the DA line in the communication unit 1 and the DA line in the communication cable 3 are connected to each other via the internal signal line 14.
  • the DB line in the communication unit 1 and the DB line in the communication cable 3 are connected to each other via an internal signal line 14.
  • the DG line in the communication unit 1 and the DG line in the communication cable 3 are connected to each other via an internal signal line 14.
  • the internal signal line 14 is composed only of a conductor such as a substrate pattern, for example.
  • the adapter 2 can connect the communication unit 1 and the communication cable 3 with a simple wiring having a branch connection as compared with a case where a control circuit for communication between the communication unit 1 and the communication cable 3 is incorporated.
  • the termination resistor 4 is also connected to the signal line in the communication unit 1 through the internal signal line 14 in the same manner as the communication cable 3.
  • the SLD line of the communication cable 3 is connected to the shield 10 in the cable connector 5 through the plug 8.
  • the internal shield line 15 is connected to the SLD line in the communication unit 1.
  • the inner shield line 15 is composed of only a conductor such as a substrate pattern, for example.
  • the internal FG line 16 is connected to the FG line in the communication unit 1.
  • the FG line in the communication unit 1 and the FG line extended from the FG terminal 7 to the outside of the adapter 2 are connected to each other via the internal FG line 16 and the FG terminal 7.
  • the adapter 2 can connect the FG line in the communication unit 1 and the FG line extended from the FG terminal 7 to the outside of the adapter 2 at the same potential.
  • FIG. 5 is a diagram showing a schematic configuration of a communication system including a conventional terminal block.
  • the communication cable 3 is a shielded multi-core cable that is a dedicated product prepared according to the type of communication.
  • the terminal block 21 is attached to each communication unit 1.
  • the terminal block 21 is mounted with various terminals 22 and FG terminals 7 for connection of communication cables.
  • FIG. 6 is a plan view of the terminal block on the side where various terminals for cable connection and the FG terminal are mounted.
  • FIG. 7 is a diagram showing a state where the communication cable and the FG line are connected to the terminal block shown in FIG.
  • the various terminals 22 include a shield terminal 23 to which the shield line 26 is connected and a signal terminal 24 to which the signal line 25 is connected.
  • Each signal line 25 of the communication cable 3 is connected to a different signal terminal 24.
  • the core wires which are the same signal wires taken out from the two communication cables 3, are connected to the signal terminal 24 with the ends thereof being matched by the signal terminal 24.
  • the shield wire 26 is subjected to terminal processing after being twisted together.
  • the shield wires 26 taken out from the two communication cables 3 are bundled together and then connected to the shield terminal 23.
  • the adapter 2 includes cable connectors 5 and 6 corresponding to standard products, so that the connection of each signal line and the shield line can be performed by inserting the plug 8 into the cable connectors 5 and 6. Connections can be made simultaneously.
  • the operator does not need to take out the signal line from the communication cable 3, work to connect the core wires from the two communication cables 3, and bundle the shield wires 26.
  • the operator can connect the communication cable 3 that can be attached to the standardized connector by a simple operation.
  • the operator can also connect the termination resistor 4 by a simple operation as with the communication cable 3.
  • the adapter 2 can greatly simplify the wiring at the connection portion with the communication cable 3 as compared with the case where the connection to the terminal for each signal line and the connection to the terminal of the shield line are required.
  • the adapter 2 can reduce the wiring at the connection portion with the communication cable 3, thereby simplifying the work in changing the connection of the communication unit 1 in the communication system or replacing the communication cable 3. Obtainable.
  • the adapter 2 is a communication method change between communications that can use a shielded multi-core cable corresponding to the same type of connector
  • the communication cable 3 can be replaced.
  • a general-purpose shielded multicore cable can be used as the communication cable 3 to change between a communication system based on EIA-485 and a communication system based on Ethernet (registered trademark).
  • the adapter 2 has an effect that it is possible to attach the communication cable 3 by a simple work, simplify the wiring around the portion to which the communication cable 3 is connected, and obtain high maintainability.
  • the communication cable 3 used for EIA-485 and CC-Link needs to be shielded to reduce the influence of disturbance noise.
  • the adapter 2 is suitable when the shielded communication cable 3 is used to reduce the influence of disturbance noise.
  • the adapter 2 is provided with an FG terminal 7 in addition to the cable connectors 5 and 6.
  • the adapter 2 can maintain the FG connection even when the communication cable 3 is disconnected from the cable connectors 5 and 6.
  • the communication adapter according to the present invention is not limited to a communication adapter for serial communication.
  • the communication adapter may be an adapter for any communication such as parallel communication, LAN communication, USB communication, and Ethernet communication.

Abstract

A communication adapter that serves as a relay between a communication unit (1) and communication cables (3) in a daisy-chain communication network. A first cable connector (5) and a second cable connector (6) are mounted on said communication adapter. Each of said cable connectors supports a communication cable provided with the following: a plug (8) that can be plugged into a standardized connector; and a connecting wire. Each cable connector is provided with a shield that can be connected to the connecting wire in a communication cable. This communication adapter is provided with a conductor that comprises the following: a connecting pathway from the communication unit to pins inside the first cable connector; and a connecting pathway from the communication unit to pins inside the second cable connector. This communication adapter is also provided with a conductor that comprises the following: a connecting pathway from a connecting wire in the communication unit to the shield provided on the first cable connector; and a connecting pathway from the connecting wire in the communication unit to the shield provided on the second cable connector.

Description

通信アダプタCommunication adapter
　本発明は、通信ユニットと通信ケーブルとを中継する通信アダプタに関する。 The present invention relates to a communication adapter that relays a communication unit and a communication cable.
　シリアルベースの通信、例えばＥＩＡ－４８５等による通信システムには、複数の機器が直列に接続されるいわゆるデイジーチェーン接続が採用されることがある。デイジーチェーン方式により繋げられる通信ユニットには、２本の通信ケーブルが接続される。通信端である通信ユニットには、１本の通信ケーブルと終端抵抗とが接続される。通信ユニットと通信ケーブルとは、例えば端子台を用いて接続される。 A so-called daisy chain connection in which a plurality of devices are connected in series may be employed in a communication system based on serial communication such as EIA-485. Two communication cables are connected to the communication units connected by the daisy chain method. One communication cable and a terminating resistor are connected to the communication unit that is the communication end. The communication unit and the communication cable are connected using, for example, a terminal block.
　通信ケーブルとしては、通信の種別に応じて用意された専用品であるケーブル、あるいは専用品と同等の仕様のケーブルが推奨されることがある。通信ケーブルとしては、シールド線を備えるシールド付きケーブルが使用される。シールド線は、撚り合わせられてから端子加工が施され、通信ケーブルの他の信号線と同様に端子台に接続される。各端子台には、通信ケーブルの信号線が接続される端子、およびシールド線が接続される端子のほかに、フレームグラウンド（ＦＧ）端子が実装される。 As a communication cable, a cable that is a dedicated product prepared according to the type of communication or a cable with the same specifications as the dedicated product may be recommended. As the communication cable, a shielded cable including a shielded wire is used. The shield wire is twisted and then subjected to terminal processing, and is connected to the terminal block like the other signal wires of the communication cable. Each terminal block is mounted with a frame ground (FG) terminal in addition to a terminal to which a signal line of a communication cable is connected and a terminal to which a shield line is connected.
　このような端子台に通信ケーブルを接続するには、ケーブル加工などの工数が必要となる。ケーブル加工には、通信ケーブルの信号線１本ごとに端子へ取り付けること、シールド線を束ねて端子へ取り付けること、２本の通信ケーブルから取り出された同じ信号線同士を合わせて端子台に接続することが含まれる。 To connect a communication cable to such a terminal block, man-hours such as cable processing are required. For cable processing, attach each signal line of the communication cable to the terminal, bundle the shield wires and attach to the terminal, and connect the same signal lines taken out from the two communication cables together to the terminal block It is included.
　この端子台を用いる接続方式の場合、通信ケーブルと端子台との接続部分の周辺における配線が多くなることが問題となる。配線が多くなると、通信ユニットの配列の変更や通信ケーブルの交換などにおける作業が複雑となることで、通信システムのメンテナンス性が低くなる。また、通信ケーブルとして、特定の通信に専用のケーブルを使用することで、他の通信方式への変更には通信ケーブルの交換を要することになる。 In the case of the connection method using this terminal block, there is a problem that the wiring around the connection portion between the communication cable and the terminal block increases. When the number of wirings is increased, work in changing the arrangement of communication units, exchanging communication cables, and the like becomes complicated, and the maintainability of the communication system is lowered. In addition, by using a dedicated cable for specific communication as the communication cable, it is necessary to exchange the communication cable to change to another communication method.
　例えば、特許文献１には、３個のコネクタを備えるアダプタをデイジーチェーン接続に使用する構成方法が開示されている。特許文献２および３には、規格品である複数のコネクタを備える装置が開示されている。 For example, Patent Document 1 discloses a configuration method in which an adapter having three connectors is used for daisy chain connection. Patent Documents 2 and 3 disclose an apparatus including a plurality of standard connectors.
特開２００４－７０４２２号公報JP 2004-70422 A 特開平１１－２７４０５号公報JP-A-11-27405 特開平９－１２９３２８号公報JP-A-9-129328
　特許文献１に開示の方法には、コネクタとして規格品を使用するか否かの明示がなされていない。特許文献２および３に開示の装置には、通信ケーブル、コネクタおよび装置内部におけるシールド線の接続について明確にされていない。従来技術によると、簡易な作業による通信ケーブルの装着と、通信ケーブルが接続される部分の周辺における配線の簡素化とを実現することが困難となる。 The method disclosed in Patent Document 1 does not clearly indicate whether or not to use a standard product as a connector. In the devices disclosed in Patent Documents 2 and 3, the connection of communication cables, connectors, and shield wires inside the device is not clarified. According to the prior art, it is difficult to realize the mounting of the communication cable by simple work and the simplification of the wiring around the portion to which the communication cable is connected.
　本発明は、上記に鑑みてなされたものであって、簡易な作業による通信ケーブルの装着と、通信ケーブルが接続される部分の周辺における配線の簡素化とを可能とし、かつ高いメンテナンス性を得られる通信アダプタを得ることを目的とする。 The present invention has been made in view of the above, and enables mounting of a communication cable by simple work and simplification of wiring around a portion to which the communication cable is connected, and obtains high maintainability. The purpose is to obtain a communication adapter.
　上述した課題を解決し、目的を達成するために、本発明は、デイジーチェーン接続による通信ネットワークにおいて、通信ユニットと通信ケーブルとを中継する通信アダプタであって、規格化されたコネクタへ装着可能なプラグと接続線とを備える前記通信ケーブルに対応する第１のケーブルコネクタおよび第２のケーブルコネクタが実装され、前記第１のケーブルコネクタおよび前記第２のケーブルコネクタには、それぞれ、前記通信ケーブルが備える前記接続線に接続されるシールドが付され、前記通信ユニット側から前記第１のケーブルコネクタ内のピンへ至る接続経路と、前記通信ユニット側から前記第２のケーブルコネクタ内のピンへ至る接続経路とを構成する導線と、前記通信ユニットが備える接続線から前記第１のケーブルコネクタに付された前記シールドへ至る接続経路と、前記通信ユニットが備える前記接続線から前記第２のケーブルコネクタに付された前記シールドへ至る接続経路とを構成する導線と、を備えることを特徴とする。 In order to solve the above-described problems and achieve the object, the present invention is a communication adapter that relays a communication unit and a communication cable in a communication network using a daisy chain connection, and can be attached to a standardized connector. A first cable connector and a second cable connector corresponding to the communication cable including a plug and a connection line are mounted, and the communication cable is connected to each of the first cable connector and the second cable connector. A shield connected to the connection line, a connection path from the communication unit side to the pins in the first cable connector, and a connection from the communication unit side to the pins in the second cable connector The first cable from a conductive wire constituting a path and a connection line provided in the communication unit A conductive path that forms a connection path leading to the shield attached to the connector and a connection path leading from the connection line included in the communication unit to the shield attached to the second cable connector. And
　本発明にかかる通信アダプタは、規格品に対応する第１のケーブルコネクタと第２のケーブルコネクタを備えることで、規格化されたコネクタへ装着可能な通信ケーブルを簡易な作業によって接続することができる。通信ケーブルの信号線は、簡易な構成の導線を介して通信ユニット側に接続される。通信ケーブルが備える接続線は、第１のケーブルコネクタおよび第２のケーブルコネクタのそれぞれのシールドと導線とを介して、通信ユニットが備える接続線に接続される。シリアル通信アダプタは、通信ケーブルの信号線ごとの端子への取り付けや接続線を束ねてからの端子への取り付けを要する場合よりも、工数を少なくすることができる。シリアル通信アダプタは、通信ケーブルとの接続部分における配線を簡素化できる。配線を少なくできることで、通信ユニットの接続を変更する場合や通信ケーブルの交換などにおける作業を簡易にでき、高いメンテナンス性を得ることができる。通信アダプタは、同型の汎用のシールド付き多芯ケーブルを使用可能な通信同士における通信方式の変更であれば、通信ケーブルの交換を不要にできる。これにより、簡易な作業による通信ケーブルの装着と、通信ケーブルが接続される部分の周辺における配線の簡素化とを可能とし、かつ高いメンテナンス性を得られるという効果を奏する。 The communication adapter according to the present invention includes the first cable connector and the second cable connector corresponding to the standard product, so that the communication cable that can be attached to the standardized connector can be connected by a simple operation. . The signal line of the communication cable is connected to the communication unit side through a conducting wire with a simple configuration. The connection line included in the communication cable is connected to the connection line included in the communication unit via the shield and the conductive line of each of the first cable connector and the second cable connector. The serial communication adapter can reduce the number of man-hours compared to the case where it is necessary to attach the communication cable to the terminal for each signal line or to attach the connection line to the terminal. The serial communication adapter can simplify the wiring at the connection portion with the communication cable. Since the wiring can be reduced, the work in changing the connection of the communication unit or exchanging the communication cable can be simplified, and high maintainability can be obtained. If the communication adapter is a communication method change between communications that can use the same type of general-purpose shielded multicore cable, it is possible to eliminate the need to replace the communication cable. As a result, it is possible to attach the communication cable by a simple work, simplify the wiring around the portion to which the communication cable is connected, and obtain high maintainability.
図１は、本発明の実施の形態にかかる通信アダプタであるシリアル通信アダプタを備える通信システムの概略構成を示す図である。FIG. 1 is a diagram showing a schematic configuration of a communication system including a serial communication adapter that is a communication adapter according to an embodiment of the present invention. 図２は、アダプタのうちケーブルコネクタおよびＦＧ端子が実装されている側の平面図である。FIG. 2 is a plan view of the adapter on the side where the cable connector and the FG terminal are mounted. 図３は、図２に示すアダプタに通信ケーブルおよびＦＧ線が接続された状態を示す図である。FIG. 3 is a diagram illustrating a state in which a communication cable and an FG line are connected to the adapter illustrated in FIG. 図４は、通信ユニット、アダプタおよび通信ケーブルの電気的な接続の例を示す図である。FIG. 4 is a diagram illustrating an example of electrical connection of a communication unit, an adapter, and a communication cable. 図５は、従来の端子台を備える通信システムの概略構成を示す図である。FIG. 5 is a diagram illustrating a schematic configuration of a communication system including a conventional terminal block. 図６は、端子台のうち、ケーブルの接続のための各種端子とＦＧ端子が実装されている側の平面図である。FIG. 6 is a plan view of the terminal block on the side where various terminals for cable connection and the FG terminal are mounted. 図７は、図６に示す端子台に通信ケーブルおよびＦＧ線が接続された状態を示す図である。FIG. 7 is a diagram showing a state where the communication cable and the FG line are connected to the terminal block shown in FIG.
　以下に、本発明にかかる通信アダプタの実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, embodiments of a communication adapter according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
実施の形態．
　図１は、本発明の実施の形態にかかる通信アダプタであるシリアル通信アダプタを備える通信システムの概略構成を示す図である。通信システムは、例えばＥＩＡ－４８５等による通信システムである。通信システムは、例えば、シーケンスシステムにおける通信ネットワークを構成する。 Embodiment.
FIG. 1 is a diagram showing a schematic configuration of a communication system including a serial communication adapter that is a communication adapter according to an embodiment of the present invention. The communication system is a communication system based on EIA-485, for example. The communication system constitutes a communication network in a sequence system, for example.
　通信システムは、複数の通信ユニット１を備える。複数の通信ユニット１は、デイジーチェーン方式により直列に接続されている。通信システムは、デイジーチェーン接続による通信ネットワークを構成している。複数の通信ユニット１は、通信ケーブル３を介するシリアル通信により、データを送受信する。 The communication system includes a plurality of communication units 1. The plurality of communication units 1 are connected in series by a daisy chain method. The communication system constitutes a communication network by daisy chain connection. The plurality of communication units 1 transmit and receive data by serial communication via the communication cable 3.
　通信ケーブル３は、規格化されたコネクタへ装着可能なプラグ８を両端に備える。通信ケーブル３は、内部に、接続線であるシールド線を備える。通信ケーブル３は、汎用のシールド付き多芯ケーブルとする。通信ケーブル３としては、例えば、カテゴリー５ｅ対応ＳＴＰケーブルを使用する。接続線は、シールド線であるほか、いずれの導線であっても良い。 The communication cable 3 has plugs 8 at both ends that can be attached to standardized connectors. The communication cable 3 includes a shield wire that is a connection wire inside. The communication cable 3 is a general-purpose shielded multicore cable. As the communication cable 3, for example, a category 5e compatible STP cable is used. The connecting wire is a shielded wire or any conductive wire.
　アダプタ２は、通信ユニット１と通信ケーブル３とを中継するシリアル通信アダプタとして機能する。アダプタ２は、各通信ユニット１に取り付けられている。アダプタ２は、通信ユニット接続コネクタ９を介して、通信ユニット１に取り付けられている。 The adapter 2 functions as a serial communication adapter that relays between the communication unit 1 and the communication cable 3. The adapter 2 is attached to each communication unit 1. The adapter 2 is attached to the communication unit 1 via the communication unit connection connector 9.
　アダプタ２は、２つのケーブルコネクタ５，６、およびフレームグラウンド（ＦＧ）端子７が実装されている。ケーブルコネクタ５は、第１のケーブルコネクタである。ケーブルコネクタ６は、第２のケーブルコネクタである。 The adapter 2 has two cable connectors 5 and 6 and a frame ground (FG) terminal 7 mounted thereon. The cable connector 5 is a first cable connector. The cable connector 6 is a second cable connector.
　図２は、アダプタのうちケーブルコネクタおよびＦＧ端子が実装されている側の平面図である。図３は、図２に示すアダプタに通信ケーブルおよびＦＧ線が接続された状態を示す図である。 FIG. 2 is a plan view of the adapter on the side where the cable connector and the FG terminal are mounted. FIG. 3 is a diagram illustrating a state in which a communication cable and an FG line are connected to the adapter illustrated in FIG.
　ケーブルコネクタ５，６は、通信ケーブル３に対応可能な構成を備える。ケーブルコネクタ５，６は、通信ケーブル３のプラグ８を嵌め込み可能に構成されている。２つのケーブルコネクタ５，６は、同じ構成を備える。ケーブルコネクタ５，６には、シールド１０が付されている。ケーブルコネクタ５に付されたシールド１０およびケーブルコネクタ６に付されたシールド１０のそれぞれは、通信ケーブル３が備える接続線であるシールド線に接続可能とされている。ケーブルコネクタ５，６としては、規格品であるコネクタ、例えば、シールド付きＲＪ－４５コネクタを使用する。 The cable connectors 5 and 6 have a configuration compatible with the communication cable 3. The cable connectors 5 and 6 are configured so that the plug 8 of the communication cable 3 can be fitted therein. The two cable connectors 5 and 6 have the same configuration. A shield 10 is attached to the cable connectors 5 and 6. Each of the shield 10 attached to the cable connector 5 and the shield 10 attached to the cable connector 6 can be connected to a shield line that is a connection line included in the communication cable 3. As the cable connectors 5 and 6, standard connectors such as shielded RJ-45 connectors are used.
　通信ケーブル３は、２つの通信ユニット１のうち一方の側のケーブルコネクタ５と、他方の側のケーブルコネクタ６とに接続されている。通信端を構成する通信ユニット１以外の通信ユニット１は、ケーブルコネクタ５，６の双方にそれぞれ通信ケーブル３が接続されている。通信端を構成する通信ユニット１は、ケーブルコネクタ５，６のうちの一方に通信ケーブル３が接続され、他方には終端抵抗４が接続されている。 The communication cable 3 is connected to a cable connector 5 on one side of the two communication units 1 and a cable connector 6 on the other side. In the communication units 1 other than the communication unit 1 constituting the communication end, the communication cable 3 is connected to both of the cable connectors 5 and 6. In the communication unit 1 constituting the communication end, the communication cable 3 is connected to one of the cable connectors 5 and 6, and the termination resistor 4 is connected to the other.
　ＦＧ端子７には、ＦＧ線が接続されている。通信ユニット１の筐体は、ＦＧ端子７およびＦＧ線を介して接地されている。ＦＧ線は、例えば、ねじ締め形式のＦＧ端子７に接続されている。 FG line is connected to the FG terminal 7. The housing of the communication unit 1 is grounded via the FG terminal 7 and the FG line. The FG line is connected to, for example, a screw tightening type FG terminal 7.
　図４は、通信ユニット、アダプタおよび通信ケーブルの電気的な接続の例を示す図である。ここでは、ＣＣ－Ｌｉｎｋ（Control　&　Communication　Link）（登録商標）における通信ユニット１、アダプタ２、通信ケーブル３およびＦＧ端子７についての接続を例とする。ケーブルコネクタ５，６は、通信ネットワークにおいて通信ケーブル３と通信ユニット１との間で結線すべき芯線と同数か、結線すべき芯線より多い数のピン１１，１２を備える。 FIG. 4 is a diagram showing an example of electrical connection of a communication unit, an adapter, and a communication cable. Here, the connection about the communication unit 1, the adapter 2, the communication cable 3, and the FG terminal 7 in CC-Link (Control & Communication Link) (registered trademark) is taken as an example. The cable connectors 5 and 6 include the same number of pins 11 and 12 as the core wires to be connected between the communication cable 3 and the communication unit 1 in the communication network or more than the core wires to be connected.
　アダプタ２は、内部信号線１４、内部シールド線１５および内部ＦＧ線１６を備える。内部信号線１４は、通信ユニット１側からケーブルコネクタ５内のピン１１へ至る接続経路と、通信ユニット１側からケーブルコネクタ６内のピン１２へ至る接続経路とを構成する導線である。 The adapter 2 includes an internal signal line 14, an internal shield line 15, and an internal FG line 16. The internal signal line 14 is a conducting wire constituting a connection path from the communication unit 1 side to the pin 11 in the cable connector 5 and a connection path from the communication unit 1 side to the pin 12 in the cable connector 6.
　アダプタ２には、通信ネットワークにおいて通信ケーブル３と通信ユニット１との間で結線すべき芯線と同数の内部信号線１４が構成されている。各内部信号線１４は、例えば、通信ユニット接続コネクタ９内のピン１３とケーブルコネクタ５内のピン１１とを接続する経路の中途位置から、ケーブルコネクタ６内のピン１２へ至る経路が分岐された分岐結線をなす。 The adapter 2 includes the same number of internal signal lines 14 as the core wires to be connected between the communication cable 3 and the communication unit 1 in the communication network. Each internal signal line 14 is branched, for example, from a midway position in the path connecting the pin 13 in the communication unit connection connector 9 and the pin 11 in the cable connector 5 to the pin 12 in the cable connector 6. Make a branch connection.
　内部シールド線１５は、通信ユニット１が備える接続線であるシールド（ＳＬＤ）線からケーブルコネクタ５に付されたシールド１０へ至る接続経路と、通信ユニット１が備えるＳＬＤ線からケーブルコネクタ６に付されたシールド１０へ至る接続経路とを構成する導線である。 The internal shield line 15 is attached to the cable connector 6 from the shield (SLD) line, which is a connection line included in the communication unit 1, to the shield 10 attached to the cable connector 5, and from the SLD line included in the communication unit 1. It is a conducting wire constituting a connection path to the shield 10.
　内部シールド線１５は、例えば、通信ユニット１内のＳＬＤ線とケーブルコネクタ５内のシールド１０とを接続する導線の中途位置から、ケーブルコネクタ６内のシールド１０へ至る導線が分岐された分岐結線をなす。内部ＦＧ線１６は、通信ユニット１内のＦＧ線とＦＧ端子７とを接続する導線である。 The internal shield wire 15 is, for example, a branch connection in which a conductor leading from the middle position of the conductor connecting the SLD line in the communication unit 1 and the shield 10 in the cable connector 5 to the shield 10 in the cable connector 6 is branched. Eggplant. The internal FG line 16 is a conducting wire that connects the FG line in the communication unit 1 and the FG terminal 7.
　通信ユニット１は、信号線であるＤＡ，ＤＢ，ＤＧ，ＮＣ，ＮＣの各線、ＳＬＤ線およびＦＧ線を備える。通信ケーブル３は、信号線であるＤＡ，ＤＢ，ＤＧ，ＮＣ，ＮＣ，ＮＣ，ＮＣ，ＮＣの各線と、２本のＳＬＤ線を備える。２本のＳＬＤ線は、通信ケーブル３のうち例えばプラグ８の手前にて１本に束ねられている。 The communication unit 1 includes signal lines DA, DB, DG, NC, NC, SLD lines, and FG lines. The communication cable 3 includes signal lines DA, DB, DG, NC, NC, NC, NC, NC, and two SLD lines. The two SLD lines are bundled together in the communication cable 3, for example, before the plug 8.
　ケーブルコネクタ５にプラグ８が装着されると、通信ケーブル３のＤＡ，ＤＢ，ＤＧの各線は、それぞれピン１１に接続される。内部信号線１４のうちケーブルコネクタ５側の端部は、ＤＡ，ＤＢ，ＤＧの各線が接続されるピン１１にそれぞれ接続されている。 When the plug 8 is attached to the cable connector 5, the DA, DB, and DG lines of the communication cable 3 are connected to the pins 11, respectively. The end of the internal signal line 14 on the cable connector 5 side is connected to a pin 11 to which each line of DA, DB, and DG is connected.
　ケーブルコネクタ６にプラグ８が装着されると、通信ケーブル３のＤＡ，ＤＢ，ＤＧの各線は、それぞれピン１２に接続される。内部信号線１４のうちケーブルコネクタ６側の端部は、ＤＡ，ＤＢ，ＤＧの各線が接続されるピン１２にそれぞれ接続されている。 When the plug 8 is attached to the cable connector 6, the DA, DB, and DG lines of the communication cable 3 are connected to the pins 12, respectively. The end of the internal signal line 14 on the cable connector 6 side is connected to a pin 12 to which each line of DA, DB, and DG is connected.
　通信ユニット接続コネクタ９内では、通信ユニット１内のＤＡ，ＤＢ，ＤＧの各線が接続されるピン１３のそれぞれに、内部信号線１４が接続される。これにより、通信ユニット１内のＤＡ線と通信ケーブル３内のＤＡ線とは、内部信号線１４を介して互いに接続される。通信ユニット１内のＤＢ線と通信ケーブル３内のＤＢ線とは、内部信号線１４を介して互いに接続される。通信ユニット１内のＤＧ線と通信ケーブル３内のＤＧ線とは、内部信号線１４を介して互いに接続される。 In the communication unit connection connector 9, an internal signal line 14 is connected to each of the pins 13 to which the DA, DB, and DG lines in the communication unit 1 are connected. Thereby, the DA line in the communication unit 1 and the DA line in the communication cable 3 are connected to each other via the internal signal line 14. The DB line in the communication unit 1 and the DB line in the communication cable 3 are connected to each other via an internal signal line 14. The DG line in the communication unit 1 and the DG line in the communication cable 3 are connected to each other via an internal signal line 14.
　内部信号線１４は、例えば、基板パターンなどの導体のみから構成されている。アダプタ２は、通信ユニット１と通信ケーブル３との通信のための制御回路などを組み込む場合に比べて、分岐結線とする簡易な配線によって通信ユニット１と通信ケーブル３とを接続することができる。なお、終端抵抗４も、通信ケーブル３と同様に、内部信号線１４を介して、通信ユニット１内の信号線へ接続される。 The internal signal line 14 is composed only of a conductor such as a substrate pattern, for example. The adapter 2 can connect the communication unit 1 and the communication cable 3 with a simple wiring having a branch connection as compared with a case where a control circuit for communication between the communication unit 1 and the communication cable 3 is incorporated. The termination resistor 4 is also connected to the signal line in the communication unit 1 through the internal signal line 14 in the same manner as the communication cable 3.
　ケーブルコネクタ５にプラグ８が装着されると、通信ケーブル３のＳＬＤ線は、プラグ８を介して、ケーブルコネクタ５内のシールド１０に接続される。通信ユニット接続コネクタ９内では、通信ユニット１内のＳＬＤ線に内部シールド線１５が接続される。これにより、通信ユニット１内のＳＬＤ線と、ケーブルコネクタ５に接続された通信ケーブル３内のＳＬＤ線とは、ケーブルコネクタ５内のシールド１０と内部シールド線１５とを介して互いに接続される。 When the plug 8 is attached to the cable connector 5, the SLD line of the communication cable 3 is connected to the shield 10 in the cable connector 5 through the plug 8. In the communication unit connector 9, the internal shield line 15 is connected to the SLD line in the communication unit 1. As a result, the SLD line in the communication unit 1 and the SLD line in the communication cable 3 connected to the cable connector 5 are connected to each other via the shield 10 and the internal shield line 15 in the cable connector 5.
　ケーブルコネクタ６にプラグ８が装着されると、通信ケーブル３のＳＬＤ線は、プラグ８を介して、ケーブルコネクタ６内のシールド１０に接続される。これにより、通信ユニット１内のＳＬＤ線と、ケーブルコネクタ６に接続された通信ケーブル３内のＳＬＤ線とは、ケーブルコネクタ６内のシールド１０と内部シールド線１５とを介して互いに接続される。内部シールド線１５は、例えば、基板パターンなどの導体のみから構成されている。 When the plug 8 is attached to the cable connector 6, the SLD line of the communication cable 3 is connected to the shield 10 in the cable connector 6 via the plug 8. Thus, the SLD line in the communication unit 1 and the SLD line in the communication cable 3 connected to the cable connector 6 are connected to each other via the shield 10 and the internal shield line 15 in the cable connector 6. The inner shield line 15 is composed of only a conductor such as a substrate pattern, for example.
　通信ユニット接続コネクタ９内では、通信ユニット１内のＦＧ線に内部ＦＧ線１６が接続される。これにより、通信ユニット１内のＦＧ線と、ＦＧ端子７からアダプタ２外へ延ばされたＦＧ線とは、内部ＦＧ線１６およびＦＧ端子７を介して互いに接続される。アダプタ２は、通信ユニット１内のＦＧ線と、ＦＧ端子７からアダプタ２外へ延ばされたＦＧ線とを、同一電位で接続することができる。 In the communication unit connector 9, the internal FG line 16 is connected to the FG line in the communication unit 1. Thereby, the FG line in the communication unit 1 and the FG line extended from the FG terminal 7 to the outside of the adapter 2 are connected to each other via the internal FG line 16 and the FG terminal 7. The adapter 2 can connect the FG line in the communication unit 1 and the FG line extended from the FG terminal 7 to the outside of the adapter 2 at the same potential.
　ここで、本実施の形態にかかるシリアル通信アダプタを備える構成と従来の端子台を備える構成との差異を明確にするため、従来の端子台を備える構成とその問題点について説明する。 Here, in order to clarify the difference between the configuration including the serial communication adapter according to the present embodiment and the configuration including the conventional terminal block, the configuration including the conventional terminal block and its problems will be described.
　図５は、従来の端子台を備える通信システムの概略構成を示す図である。通信ケーブル３は、通信の種別に応じて用意された専用品であるシールド付き多芯ケーブルである。端子台２１は、各通信ユニット１に取り付けられている。端子台２１は、通信ケーブルの接続のための各種端子２２とＦＧ端子７が実装されている。 FIG. 5 is a diagram showing a schematic configuration of a communication system including a conventional terminal block. The communication cable 3 is a shielded multi-core cable that is a dedicated product prepared according to the type of communication. The terminal block 21 is attached to each communication unit 1. The terminal block 21 is mounted with various terminals 22 and FG terminals 7 for connection of communication cables.
　図６は、端子台のうち、ケーブルの接続のための各種端子とＦＧ端子が実装されている側の平面図である。図７は、図６に示す端子台に通信ケーブルおよびＦＧ線が接続された状態を示す図である。各種端子２２は、シールド線２６が接続されるシールド用端子２３と、信号線２５が接続される信号用端子２４とを備える。 FIG. 6 is a plan view of the terminal block on the side where various terminals for cable connection and the FG terminal are mounted. FIG. 7 is a diagram showing a state where the communication cable and the FG line are connected to the terminal block shown in FIG. The various terminals 22 include a shield terminal 23 to which the shield line 26 is connected and a signal terminal 24 to which the signal line 25 is connected.
　通信ケーブル３の各信号線２５は、それぞれ別の信号用端子２４に接続される。２本の通信ケーブル３から取り出された同じ信号線である芯線同士は、信号用端子２４で端部が合わせられて、信号用端子２４に接続される。シールド線２６は、撚り合わせられてから端子加工が施される。２本の通信ケーブル３から取り出されたシールド線２６同士は、互いに束ねられてから、シールド用端子２３に接続される。 Each signal line 25 of the communication cable 3 is connected to a different signal terminal 24. The core wires, which are the same signal wires taken out from the two communication cables 3, are connected to the signal terminal 24 with the ends thereof being matched by the signal terminal 24. The shield wire 26 is subjected to terminal processing after being twisted together. The shield wires 26 taken out from the two communication cables 3 are bundled together and then connected to the shield terminal 23.
　端子台２１に通信ケーブル３を接続するには、信号線２５ごとに信号用端子２４への接続のための作業、２本の通信ケーブル３から取り出された芯線同士を合わせる作業、シールド線２６を束ねてシールド用端子２３に接続する作業を要することとなる。また、端子台２１を用いる接続方式の場合、通信ケーブル３と端子台２１との接続部分の周辺における配線が多くなる。 In order to connect the communication cable 3 to the terminal block 21, the operation for connecting each signal line 25 to the signal terminal 24, the operation of aligning the core wires taken out from the two communication cables 3, The work of bundling and connecting to the shield terminal 23 is required. In the case of the connection method using the terminal block 21, the wiring around the connection portion between the communication cable 3 and the terminal block 21 increases.
　これに対し、本実施の形態にかかるアダプタ２は、規格品に対応するケーブルコネクタ５，６を備えることで、ケーブルコネクタ５，６へのプラグ８の挿入によって信号線ごとの接続とシールド線の接続とを同時に行うことができる。作業者は、通信ケーブル３から信号線を取り出す作業や、２本の通信ケーブル３からの芯線を合わせて接続する作業、シールド線２６を束ねる作業などが不要となる。作業者は、規格化されたコネクタへ装着可能な通信ケーブル３を簡易な作業によって接続することができる。作業者は、終端抵抗４についても、通信ケーブル３と同様に、簡易な作業によって接続することができる。 On the other hand, the adapter 2 according to the present embodiment includes cable connectors 5 and 6 corresponding to standard products, so that the connection of each signal line and the shield line can be performed by inserting the plug 8 into the cable connectors 5 and 6. Connections can be made simultaneously. The operator does not need to take out the signal line from the communication cable 3, work to connect the core wires from the two communication cables 3, and bundle the shield wires 26. The operator can connect the communication cable 3 that can be attached to the standardized connector by a simple operation. The operator can also connect the termination resistor 4 by a simple operation as with the communication cable 3.
　アダプタ２は、信号線ごとの端子への接続、およびシールド線の端子への接続をそれぞれ要する場合に比べて、通信ケーブル３との接続部分における配線を大幅に簡素化することができる。アダプタ２は、通信ケーブル３との接続部分における配線を少なくできることで、通信システム内での通信ユニット１の接続を変更する場合や通信ケーブル３の交換などにおける作業を簡易にでき、高いメンテナンス性を得ることができる。 The adapter 2 can greatly simplify the wiring at the connection portion with the communication cable 3 as compared with the case where the connection to the terminal for each signal line and the connection to the terminal of the shield line are required. The adapter 2 can reduce the wiring at the connection portion with the communication cable 3, thereby simplifying the work in changing the connection of the communication unit 1 in the communication system or replacing the communication cable 3. Obtainable.
　アダプタ２は、同型のコネクタに対応するシールド付き多芯ケーブルを使用可能な通信同士における通信方式の変更であれば、通信ケーブル３の交換を不要にできる。例えば、ＥＩＡ－４８５による通信システムと、Ｅｔｈｅｒｎｅｔ（登録商標）による通信システムとの間の変更には、通信ケーブル３として、汎用のシールド付き多芯ケーブルを流用できる。以上により、アダプタ２は、簡易な作業による通信ケーブル３の装着と、通信ケーブル３が接続される部分の周辺における配線の簡素化とを可能とし、かつ高いメンテナンス性を得られるという効果を奏する。 If the adapter 2 is a communication method change between communications that can use a shielded multi-core cable corresponding to the same type of connector, the communication cable 3 can be replaced. For example, a general-purpose shielded multicore cable can be used as the communication cable 3 to change between a communication system based on EIA-485 and a communication system based on Ethernet (registered trademark). As described above, the adapter 2 has an effect that it is possible to attach the communication cable 3 by a simple work, simplify the wiring around the portion to which the communication cable 3 is connected, and obtain high maintainability.
　ＥＩＡ－４８５やＣＣ－Ｌｉｎｋに使用される通信ケーブル３は、外乱ノイズの影響を軽減させるシールドが必要となる。アダプタ２は、外乱ノイズの影響の軽減のためにシールド付きの通信ケーブル３を使用する場合に適している。 The communication cable 3 used for EIA-485 and CC-Link needs to be shielded to reduce the influence of disturbance noise. The adapter 2 is suitable when the shielded communication cable 3 is used to reduce the influence of disturbance noise.
　ＥＩＡ－４８５やＣＣ－Ｌｉｎｋによる通信システムでは、制御盤のＦＧ接続は必要となる。アダプタ２には、ケーブルコネクタ５，６とは別にＦＧ端子７が設けられている。アダプタ２は、ケーブルコネクタ５，６から通信ケーブル３が外されているときも、ＦＧ接続を維持することができる。本発明にかかる通信アダプタは、シリアル通信のための通信アダプタである場合に限られない。通信アダプタは、パラレル通信、ＬＡＮ通信、ＵＳＢ通信、Ｅｔｈｅｒｎｅｔ通信など、いずれの通信のためのアダプタであっても良い。 In communication systems using EIA-485 and CC-Link, FG connection of the control panel is required. The adapter 2 is provided with an FG terminal 7 in addition to the cable connectors 5 and 6. The adapter 2 can maintain the FG connection even when the communication cable 3 is disconnected from the cable connectors 5 and 6. The communication adapter according to the present invention is not limited to a communication adapter for serial communication. The communication adapter may be an adapter for any communication such as parallel communication, LAN communication, USB communication, and Ethernet communication.
　１　通信ユニット、２　アダプタ、３　通信ケーブル、４　終端抵抗、５，６　ケーブルコネクタ、７　ＦＧ端子、８　プラグ、９　通信ユニット接続コネクタ、１０　シールド、１１，１２，１３　ピン、１４　内部信号線、１５　内部シールド線、１６　内部ＦＧ線。 1 communication unit, 2 adapter, 3 communication cable, 4 termination resistor, 5, 6 cable connector, 7 FG terminal, 8 plug, 9 communication unit connection connector, 10 shield, 11, 12, 13 pin, 14 internal signal line, 15 Internal shield wire, 16 internal FG wire.

Claims (2)

  1. 　デイジーチェーン接続による通信ネットワークにおいて、通信ユニットと通信ケーブルとを中継する通信アダプタであって、
    　規格化されたコネクタへ装着可能なプラグと接続線とを備える前記通信ケーブルに対応する第１のケーブルコネクタおよび第２のケーブルコネクタが実装され、
    　前記第１のケーブルコネクタおよび前記第２のケーブルコネクタには、それぞれ、前記通信ケーブルが備える前記接続線に接続されるシールドが付され、
    　前記通信ユニット側から前記第１のケーブルコネクタ内のピンへ至る接続経路と、前記通信ユニット側から前記第２のケーブルコネクタ内のピンへ至る接続経路とを構成する導線と、
    　前記通信ユニットが備える接続線から前記第１のケーブルコネクタに付された前記シールドへ至る接続経路と、前記通信ユニットが備える前記接続線から前記第２のケーブルコネクタに付された前記シールドへ至る接続経路とを構成する導線と、を備えることを特徴とする通信アダプタ。     A communication adapter that relays a communication unit and a communication cable in a daisy chain connection communication network,
    A first cable connector and a second cable connector corresponding to the communication cable including a plug and a connection line that can be attached to a standardized connector;
    Each of the first cable connector and the second cable connector is provided with a shield connected to the connection line included in the communication cable,
    A conductive wire that forms a connection path from the communication unit side to the pins in the first cable connector and a connection path from the communication unit side to the pins in the second cable connector;
    A connection path from a connection line provided in the communication unit to the shield attached to the first cable connector, and a connection from the connection line provided in the communication unit to the shield attached to the second cable connector. A communication adapter comprising: a conducting wire constituting a path.
  2. 　前記通信ユニット側から前記第１のケーブルコネクタ内のピンへ至る接続経路と、前記通信ユニット側から前記第２のケーブルコネクタ内のピンへ至る接続経路とを構成する前記導線は、前記通信ユニット側のピンと前記第１のケーブルコネクタ内のピンとを接続する経路の中途位置から、前記第２のケーブルコネクタ内のピンへ至る経路が分岐された分岐結線をなすことを特徴とする請求項１に記載の通信アダプタ。 The conducting wire constituting the connection path from the communication unit side to the pins in the first cable connector and the connection path from the communication unit side to the pins in the second cable connector is the communication unit side. 2. The branch connection is formed by branching a path from a middle position of a path connecting the first pin and the pin in the first cable connector to a pin in the second cable connector. 3. Communication adapter.
PCT/JP2013/061205 2013-04-15 2013-04-15 Communication adapter WO2014170944A1 (en)

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Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH0662010A (en) * 1992-02-27 1994-03-04 Nitsuko Corp Communication interface adapter
JP2010028670A (en) * 2008-07-23 2010-02-04 Hitachi Ulsi Systems Co Ltd Serial communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0662010A (en) * 1992-02-27 1994-03-04 Nitsuko Corp Communication interface adapter
JP2010028670A (en) * 2008-07-23 2010-02-04 Hitachi Ulsi Systems Co Ltd Serial communication system

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