JPS59228451A - Current loop transmission system - Google Patents

Current loop transmission system

Info

Publication number
JPS59228451A
JPS59228451A JP10182083A JP10182083A JPS59228451A JP S59228451 A JPS59228451 A JP S59228451A JP 10182083 A JP10182083 A JP 10182083A JP 10182083 A JP10182083 A JP 10182083A JP S59228451 A JPS59228451 A JP S59228451A
Authority
JP
Japan
Prior art keywords
transmission
current
current loop
interface
transceiver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10182083A
Other languages
Japanese (ja)
Inventor
Fumihiko Tada
多田　文彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP10182083A priority Critical patent/JPS59228451A/en
Publication of JPS59228451A publication Critical patent/JPS59228451A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/547—Systems for power line communications via DC power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To attain eace of wiring work and to reduce wiring cost by providing a charging type power supply extracting an operating power supply for one transmission/reception device with a current flowing a current loop to attain transmission and power feeding by means of two distribution cables. CONSTITUTION:A transceiver C and another transceiver D are connected mutually by two transmission lines 11a and 11b. Thus, the current loop starting from a transmission interface 12 of the transceiver C, the transmission line 11a, reception interface 13 of the transceiver D, transmission interface 14 of the transceiver D, the other transmission line 11b, reception interface 15 of the transceiver C into a transmission interface 12 of the transceiver C again, is formed. The charging type power supply 21 is provided with a constant diode 23 inserted in series with the current loop and a charging section 24 inserted in parallel with the diode 23. The constant voltage diode 23 generates the operating voltage of the transceiver D from a current flowing in the current loop.

Description

【発明の詳細な説明】 ［発明の技術分野］ 本発明は、送信情報を断続電流信号に変換して伝送する
カレントループ伝送方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a current loop transmission method that converts transmission information into an intermittent current signal and transmits the signal.

［発明の技術的背景］ 第１図はカレントループ伝送方式の従来構成図を示す。[Technical background of the invention] FIG. 1 shows a conventional configuration diagram of a current loop transmission system.

送受信装置Ａと送受信装置Ｂは、伝送路１および２と給
電線３にＪ：つて相互接続されている。伝送路１は装置
へから装置ｆＲＢへの送信に用いられ、伝送路２は装ｆ
ＪＢから装置△への送信に用いられる。伝送路１は装置
への送信インタフェース４と装＠Ｂの受信インタフェー
ス５との間にカレントループを形成し、装ＲＡにもうけ
られた電流？ｌ１ｉｉ６によってループ電流が与えられ
る。伝送路２は装置への受信インタフェース７と装置Ｂ
の送信インタフェース８との間にカレントループを形成
し、装置へにもうけられた？４ｆｔｍ９によってループ
電流が与えられる。各装置の送信インタフェース４およ
び８は、送信情報に応じて伝送路を流れるループ電流を
断続してカレントループ信号を発生する。各装置の受信
インタフェース５および７は、カレントループ信号を伝
送路のループ電流の有無によって検出する。給電線３は
、装置Ｂの動作電源を装置Ａにもうけられた電源１０か
ら供給する。The transmitting/receiving device A and the transmitting/receiving device B are interconnected to transmission lines 1 and 2 and a power feed line 3. Transmission path 1 is used for transmission from the device to device fRB, and transmission path 2 is used for transmission from device fRB.
Used for transmission from JB to device Δ. The transmission line 1 forms a current loop between the sending interface 4 to the device and the receiving interface 5 of the device @B, and the current received by the device RA? The loop current is provided by l1ii6. Transmission line 2 connects receiving interface 7 to device and device B
A current loop is formed between the transmission interface 8 of the The loop current is provided by 4ftm9. The transmission interfaces 4 and 8 of each device generate a current loop signal by intermittent loop current flowing through the transmission path according to the transmission information. The receiving interfaces 5 and 7 of each device detect the current loop signal based on the presence or absence of a loop current in the transmission path. The power supply line 3 supplies operating power for the device B from a power source 10 provided in the device A.

上記構成で、装置１Ａと装置Ｂとの間の相互伝送は、給
電線３を介して装＠Ｂに動作電源を供給している状態で
行なわれる。装置Ａから装置Ｂへの情報伝送に際しては
、送信情報に応じて装置ＨＡの送信インタフェース４を
駆動し、伝送路１を流れるループ電流を断続してカレン
トループ信号を発生する。このカレントループ信号は、
装置Ｂの受信インタフェース５でループ電流の有無によ
り検出される。装置Ｂから装置Δへの情報伝送に際して
は、送信インタフェース８．伝送路２および受信インタ
フェース７により、同様の伝送動作が行なわれる。In the above configuration, mutual transmission between device 1A and device B is performed while operating power is being supplied to device B via power supply line 3. When transmitting information from device A to device B, the transmission interface 4 of the device HA is driven in accordance with the transmitted information, and the loop current flowing through the transmission path 1 is interrupted to generate a current loop signal. This current loop signal is
The receiving interface 5 of device B detects the presence or absence of a loop current. When transmitting information from device B to device Δ, transmission interface 8. A similar transmission operation is performed by the transmission path 2 and the receiving interface 7.

［背景技術の問題点］ 以上説明した従来技術においては、伝送路として４木、
給電線として２本の計６本の配線ケーブルをもうける必
要があり、配線工事の容易性を欠きまた配線コストが増
大するなどの問題があった。[Problems in the background technology] In the conventional technology described above, four trees, four trees,
It is necessary to install two wiring cables (six in total) as power supply lines, which poses problems such as a lack of ease of wiring work and an increase in wiring costs.

一方、このように伝送路として４木の配線ケーブルを用
いるもののほかに、送受共通により２木の配線ケーブル
で伝活路を構成するものがある。On the other hand, in addition to the transmission path that uses four-wire cables as a transmission path, there is a transmission path that uses two-wire cables for transmission and reception.

しかしながら、このような方式においても、給電線は先
の従来例と同様に２木もうけなければならず、配線工事
の容易性および配線コストの増大が十分に改善されるも
のではなかった。However, even in such a system, two feeder lines must be provided as in the prior art example, and the ease of wiring work and increase in wiring costs are not sufficiently improved.

［発明の目的］ 本発明は従来の技術の上記問題点を改善するもので、そ
の目的は、２本のケーブルで情報伝送と給電が可能なカ
レントループ伝送方式を提供することにある。[Object of the Invention] The present invention is intended to improve the above-mentioned problems of the conventional technology, and its purpose is to provide a current loop transmission system that allows information transmission and power supply using two cables.

［発明の概要］ 上記目的を達成するための本発明の特徴は、送信情報に
応じた断続電流信号を送受する２つの送受信装置と、こ
れら送受信装置相互間に単一のカレン１〜ループを形成
して前記電流信号を伝送する伝送路とを有し、前記送受
信装置の一方の動作電源を、前記伝送路を流れる電流か
ら電圧を発生する手段とこの電圧で充電され前記電流信
号の断時間に前記電圧をバックアップする充電手段とを
備える充電式電源によって得るごときカレントループ伝
送方式にある。[Summary of the Invention] The features of the present invention for achieving the above object include two transmitting/receiving devices that transmit and receive intermittent current signals according to transmitted information, and forming a single loop between these transmitting/receiving devices. and a transmission path for transmitting the current signal, and a means for generating a voltage from the current flowing through the transmission path, and a means for generating a voltage from the current flowing through the transmission path, and a means for generating a voltage from the current flowing through the transmission path, and a means for generating a voltage from the current flowing through the transmission path, and a means for generating a voltage from the current flowing through the transmission path, and a means for generating a voltage from the current flowing through the transmission path, and a means for generating a voltage from the current flowing through the transmission path, The present invention is based on a current loop transmission method such as obtained by a rechargeable power source including a charging means for backing up the voltage.

［発明の実施例］ 第２図は本発明によるカレントループ伝送方式％式％ の一実施例を示す構成図である。[Embodiments of the invention] Figure 2 shows the current loop transmission system according to the present invention. FIG. 2 is a configuration diagram showing an example.

送受信装置Ｃと別の送受信装置りは２木の伝送路１１８
．１１ｂで相互接続される。これにより、装置Ｃの送信
インタフェース１２．伝送路１１ａ。Transmitting/receiving device C and another transmitting/receiving device are two transmission paths 118
．． 11b. This allows the sending interface 12. Transmission line 11a.

装置りの受信インタフェース１３．装置りの送信インタ
フェース１４．＠方の伝送路１１ｂ、装置Ｃの受信イン
タフェース１５を経て、再び装置Ｃの送信インタフェー
ス１２に至るカレントループが形成される。このカレン
トループの電流源１６は装置Ｃにもうけられている。Device receiving interface 13. Device transmission interface 14. A current loop is formed that passes through the transmission path 11b on the @ side, the reception interface 15 of the device C, and then reaches the transmission interface 12 of the device C again. A current source 16 of this current loop is provided in device C.

各装置の送信インタフェース１２および１４は、例えば
フォトトランジスタと発光ダイオードから成るフォトカ
プラで構成することができる。フォトカプラは、そのフ
ォトトランジスタがカレントループに直列に挿入され、
発光ダイオードが各装置の送信部１７．１８によって発
光駆動されるようにもうけられる。各装置の送信部１７
．１９は、フォトカプラの発光ダイオードを通常発光状
態におき、送信情報に応じてその発光を断続する。した
がって、各装置の送信インタフェース１２゜４− １／１は、通常閉状態であり、送信時に送信情報に応じ
て開閉される。この結果、カレントループには、通常ル
ープ電流が流れ、送信時に送信情報に応じて断続された
電流信号（カレントループ信号）が流れる。The transmission interfaces 12 and 14 of each device can be constituted by photocouplers consisting of phototransistors and light emitting diodes, for example. A photocoupler has its phototransistor inserted in series in a current loop,
A light emitting diode is provided to be driven to emit light by the transmitter 17, 18 of each device. Transmitter 17 of each device
．． 19 puts the light emitting diode of the photocoupler in a normal light emitting state and intermittents the light emission according to the transmitted information. Therefore, the transmission interface 12°4-1/1 of each device is normally closed, and is opened or closed according to the transmitted information during transmission. As a result, a normal loop current flows in the current loop, and a current signal (current loop signal) that is interrupted in accordance with the transmission information during transmission flows.

各装置の受信インタフェース１３．１５は、送信インタ
フェースと同様にフォトカプラで構成することができる
。この場合、フォトカプラは、その発光ダイオードがカ
レントループに直列に挿入され、フォトトランジスタの
出力が各装置の受信部１９．２０に与えられるようにも
うけられる。The receiving interface 13.15 of each device can be composed of a photocoupler, similar to the transmitting interface. In this case, a photocoupler is provided such that its light emitting diode is inserted in series in the current loop and the output of the phototransistor is given to the receiving section 19, 20 of each device.

各装置の受信インタフェース１３．１５はカレントルー
プの電流の有無を検出することによりカレントループ信
号を受信し、受信部１９．２０はそれを受けて送信情報
を得る。The receiving interface 13.15 of each device receives the current loop signal by detecting the presence or absence of current in the current loop, and the receiving section 19.20 receives the signal and obtains transmission information.

一方の送受信装置りには、カレントループを流れる電流
から当該装置りの動作電源を得るための充電式電源２１
と、情報伝送に先立って行なわれる装置の駆動電源投入
時にカレントループを閉ループとするための初期導通部
２２がもうけられる。One transmitting/receiving device has a rechargeable power source 21 for obtaining operating power for the device from the current flowing through the current loop.
An initial conduction section 22 is provided to close the current loop when the drive power of the device is turned on prior to information transmission.

充電式電源２１は、カレントループに直列挿入の定電圧
ダイオード２３と、このダイオード２３に並列挿入の充
電部２４とを有する。定電圧ダイオード２３は、カレン
トループを流れる電流から送受信装置りの動作電圧を発
生する。充電部２４は、この電圧で充電され、カレント
ループに電流が流れないとき即ち送信情報に応じてルー
プ電流が断されるループ電流遮断時に装置りに動作電圧
を供給する。充電部２４は、装置りの動作回路を例えば
０ＭＯ３のような低消費電力素子により構成すれば、第
３図に示すように、定電圧ダイオード２３に並列挿入の
コンデンサ２４ａと逆流防止のダイオード２４ｂで構成
することができる。第３図おいて、２５は装置りの回路
負荷を示し、その動作電源は、カレントループに電流が
流れている場合には定電圧ダイオード２３の両端の電圧
として与えられ、電流遮断時にはコンデンサ２／ｌａの
放電により与えられる。充電部２４の構成としては、こ
のようなコンデンサにｊ；るもののほかにζ蓄電池を用
いることも可能である。これによれば、放電容量の増大
が可能になる。なお、この場合の供給電圧の安定化は、
定電圧回路をもうけることにより容易に達成することが
できる。The rechargeable power supply 21 includes a constant voltage diode 23 inserted in series with the current loop, and a charging section 24 inserted in parallel with the diode 23. The constant voltage diode 23 generates an operating voltage for the transmitting/receiving device from the current flowing through the current loop. The charging unit 24 is charged with this voltage and supplies an operating voltage to the device when no current flows in the current loop, that is, when the loop current is cut off in accordance with the transmitted information. If the operating circuit of the device is configured with a low power consumption element such as 0MO3, the charging section 24 can be configured with a capacitor 24a inserted in parallel with the constant voltage diode 23 and a reverse current prevention diode 24b, as shown in FIG. Can be configured. In Fig. 3, 25 indicates the circuit load of the device, and its operating power is given as the voltage across the constant voltage diode 23 when current is flowing in the current loop, and when the current is cut off, the voltage across the capacitor 2/ It is given by the discharge of la. As the configuration of the charging section 24, in addition to such a capacitor, it is also possible to use a ζ storage battery. According to this, it becomes possible to increase the discharge capacity. In addition, stabilization of the supply voltage in this case is
This can be easily achieved by providing a constant voltage circuit.

初期導通部２２は、装置りの送信インタフェース１４に
並列にカレントループに挿入され、前）ホしたように情
報伝送に先立つ電源投入時にカレントループを閉ループ
とする。すなわち、装置りの充電部２４が充電されてい
ない状態では当該装置りの駆動電源がなく、そのため装
置りの送信インタフェース１４が開状態となってカレン
トループを断するので、他方の装置Ｃを駆動してもルー
プ電流が流れず装置りが駆動されることはない。このた
め、初期導通部２２はカレントループに電流が流れるよ
うに送信インタフェース１４に代って閉ループを形成す
る。初期導通部２２は、第４図（Ａ）、第４図〈Ｂ）、
第４図（Ｃ）に示すように、抵抗２２ａまたはツェナー
ダイオード２２ｂまたはリレー２２ｃによって構成する
ことができる。初期導通部２２を抵抗によって構成する
場合には、第４図（Ａ）に示すように、送信インタフ−
／− エース１４と並列に抵抗２２ａをカレントループに挿入
する。抵抗２２ａは、送信インタフェース１４の開状態
のときに当該抵抗２２ａを介して装置Ｃの受信インタフ
ェース１５に与えられる電流値が当該インタフェース１
５で電流有りと検出されない程度の小さな電流値とする
ために、その抵抗値を大とする。初期導通部２２をツェ
ナーダイオード２２ｂで構成する場合には、第４図（ｌ
Ｔ３）に示すように、送信インタフェース１４と並列に
ツェナーダイオード２２ｂをカレントループに挿入する
。ツェナーダイオード２２ｂは、送信インタフェース１
４の送信動作に従う開状態のときに当該ダイオード２２
ｂに印加される電圧より高いツェナー電圧を有する。閉
ループの形成にあたっては、装置ｆｆＣからダイオード
２２ｔｌのツェナー電圧以上の電圧を当該ダイオード２
２ｂに一時的に印加して閉ループを形成する。閉ループ
の形成で充電式電源２１が動作するので、以後はダイオ
ード２２ｂにそのツェナー電圧より低い電圧が印加され
る通常状態に戻される。初ｆｆ導通部２２をリ８− レー２２Ωで構成する場合には、第４図（Ｃ）に示すよ
うに、リレー２２ｃの常閉接点を送信インタフェース１
４と並列にカレントループに挿入する。常閉接点を有す
るリレー２２Ｇの励磁は充電式電源２１で行ない、充電
式電源２１が動作することで常閉接点が開成状態におか
れる。The initial conduction section 22 is inserted into the current loop in parallel with the transmission interface 14 of the device, and closes the current loop when the power is turned on prior to information transmission, as described above. That is, when the charging section 24 of the device is not charged, there is no driving power for the device, and therefore the transmission interface 14 of the device is in an open state and breaks the current loop, so that the other device C is not driven. Even if the loop current does not flow, the device will not be driven. Therefore, the initial conduction section 22 forms a closed loop in place of the transmission interface 14 so that current flows in the current loop. The initial conduction portion 22 is shown in FIG. 4(A), FIG. 4(B),
As shown in FIG. 4(C), it can be configured by a resistor 22a, a Zener diode 22b, or a relay 22c. When the initial conduction section 22 is constituted by a resistor, as shown in FIG. 4(A), the transmission interface
/- Insert the resistor 22a in parallel with the ace 14 into the current loop. The resistor 22a is such that the current value applied to the receiving interface 15 of the device C through the resistor 22a when the transmitting interface 14 is in the open state is equal to
In step 5, the resistance value is made large in order to make the current value so small that it is not detected that there is a current. When the initial conduction section 22 is composed of a Zener diode 22b, as shown in FIG.
As shown in T3), a Zener diode 22b is inserted into the current loop in parallel with the transmission interface 14. The Zener diode 22b is connected to the transmission interface 1
When the diode 22 is in the open state according to the transmission operation of 4.
has a higher Zener voltage than the voltage applied to b. In forming a closed loop, a voltage higher than the Zener voltage of the diode 22tl is applied from the device ffC to the diode 22tl.
2b to form a closed loop. Since the rechargeable power supply 21 operates with the formation of a closed loop, the normal state is returned to where a voltage lower than the Zener voltage is applied to the diode 22b. When the first FF conduction section 22 is composed of a relay 8-22Ω, the normally closed contact of the relay 22c is connected to the transmission interface 1 as shown in FIG. 4(C).
Insert into the current loop in parallel with 4. The relay 22G having a normally closed contact is excited by a rechargeable power source 21, and when the rechargeable power source 21 operates, the normally closed contact is placed in an open state.

第５図は上記構成の送信動作説明図で、（ａ　）は装置
Ｃの送信インタフェース１２で与えられたカレントルー
プ信号の波形、（ｂ）は装置りの送信インタフェース１
４で与えられたカレントループ信号の波形、（Ｃ）は伝
送路に送出されたカレントループ信号の波形を示す。FIG. 5 is an explanatory diagram of the transmission operation of the above configuration, where (a) shows the waveform of the current loop signal given by the transmission interface 12 of the device C, and (b) shows the waveform of the current loop signal given by the transmission interface 1 of the device C.
4, and (C) shows the waveform of the current loop signal sent to the transmission path.

以下第５図を併用して第３図の構成の動作を説明する。The operation of the configuration shown in FIG. 3 will be described below with reference to FIG. 5.

送受信装置Ｃの電源投入が行なわれると、電流源１６．
送信インタフェース１２．伝送路１１ａ１受信インタフ
エース１３．定電圧ダイオード２３゜初期導通部２２．
伝送路１１ｂ、受信インタフェース１５を経て再び電流
源１６に至るカレントループが形成され、ループ電流が
流れる。これによリ、他方の送受信装置りは、充電式電
源２１により動作電源を得て送信部１８および受信部１
つを駆動状態におくと共に送信インタフェース１４を閉
状態とする。When the transmitting/receiving device C is powered on, the current source 16.
Sending interface 12. Transmission line 11a1 reception interface 13. Constant voltage diode 23° initial conduction part 22.
A current loop is formed that passes through the transmission line 11b and the receiving interface 15 and reaches the current source 16 again, and a loop current flows. As a result, the other transmitting/receiving device obtains operating power from the rechargeable power source 21, and the transmitting section 18 and the receiving section 1
and the transmission interface 14 is placed in the closed state.

装置Ｃから装置りへの送信にあたっては、装置Ｃの送信
インタフェース１２を例えばＪ　ＴＳ−０６３２６によ
る電文形式の直列送信信号に応じて駆動し、カレントル
ープに流れる電流を断続して第５図の（ａ　）に示すよ
うな送信信号に基づくカレントループ信号を伝送路１１
ａに送出する。For transmission from device C to other devices, the transmission interface 12 of device C is driven in accordance with a serial transmission signal in the form of a telegram according to JTS-06326, for example, and the current flowing through the current loop is intermittent, as shown in FIG. A current loop signal based on the transmitted signal as shown in a) is transmitted to the transmission line 11.
Send to a.

この信号は、第５図の（Ｃ）に示すように、第５図の（
ａ　）に示される電流断続状態を保持したまま、使方の
送受信装置りに至る。他方の送受信装置ＦｆｆｉＤにお
いては、その受信インタフェース１３でカレントループ
を流れる電流の有無を検出することによりカレントルー
プ信号を受信し直列送信信号を得る。装置りにもうけら
れた充電式電！２１は、カレントループ信号による電流
遮断時においても、充電部２４により装置りの動作電源
を与えるので、装置りの動作電源がとぎれることはない
−１１− 装置Ｃから装置りへの送信が終了すると、送信インタフ
ェース１２は閉状態となり、カレントループはループ電
流が流れている無送信状態に戻る。This signal is shown in (C) of FIG.
While maintaining the current intermittent state shown in a), the transmitting/receiving device is used. The other transmitting/receiving device FffiD receives the current loop signal and obtains a serial transmission signal by detecting the presence or absence of a current flowing through the current loop at its reception interface 13. Rechargeable electricity made possible by the device! 21, even when the current is interrupted by the current loop signal, the charging section 24 supplies the operating power to the device, so the operating power to the device will not be cut off. -11- When the transmission from device C to the device is completed, , the transmission interface 12 becomes closed, and the current loop returns to the non-transmission state in which the loop current flows.

一方、装置りから装置Ｃへの送信は、装ＨＤの送信イン
タフェース１４と装置Ｃの受信インタフェース１５どの
間で前述ど同様の送信動作が行なわれ、第５図の（ｂ）
に示すような波形の送信信号に基づくカレントループ信
号が第５図の（Ｃ）に示すようにその電流断続状態を保
持したまま伝送路１１ｂを介して装置Ｃに伝送されると
共に、充電式電源２１により装置りへの給電が行なわれ
る。On the other hand, for transmission from the device to device C, the same transmission operation as described above is performed between the device HD's sending interface 14 and the device C's receiving interface 15, and the transmission is performed as shown in FIG. 5(b).
A current loop signal based on a transmission signal having a waveform as shown in FIG. 21 supplies power to the device.

［発明の効果］ 以上説明したように本発明によれば、カレントループを
流れる電流により一方の送受信装置の動作電源を取り出
す充電式電源をもうけたので、２木の配線ケーブルで伝
送および給電を行なうことができ、配線工事の容易性お
よび配線コストの低減が図れると共に、配線ケーブル接
続のための端子も２端子もうければよいので送受信装置
の小型化にも寄与するカレントループ伝送方式を提供す
ることができる。[Effects of the Invention] As explained above, according to the present invention, a rechargeable power source is provided that extracts the operating power of one of the transmitting and receiving devices using the current flowing through the current loop, so that transmission and power supply can be performed using two wooden wiring cables. To provide a current loop transmission method that facilitates wiring work and reduces wiring costs, and also contributes to miniaturization of a transmitting/receiving device since only two terminals are required for connecting a wiring cable. I can do it.

【図面の簡単な説明】[Brief explanation of drawings]

第１図はカレントループ伝送方式の従来構成図、第２図
は本発明によるカレントループ伝送方式の一実施例を示
す構成図、第３図は第２図の充電部の一具体例を示す構
成図、第４図（Ａ）、第４図（Ｂ）および第４図（Ｃ）
は第２図の初期導通部の具体例を示す構成図、第５図は
第２図の構成の送信動作説明図である。 Ｃ，Ｄ・・・送受信装置 １１ａ、１１ｂ・・・伝送路 １２．１４・・・送信インタフェース １３．１５・・・受信インタフェース １６・・・電流源 ２１・・・充電式電源 ２２・・・初Ｉ！Ｉ′Ｉ導通部 ２３・・・定電圧ダイオード ２４・・・充電部 １２− 第２図 第８図FIG. 1 is a conventional configuration diagram of a current loop transmission method, FIG. 2 is a configuration diagram showing an embodiment of the current loop transmission method according to the present invention, and FIG. 3 is a configuration diagram showing a specific example of the charging section of FIG. 2. Figures 4(A), 4(B) and 4(C)
2 is a block diagram showing a specific example of the initial conduction section of FIG. 2, and FIG. 5 is a diagram explaining the transmission operation of the configuration of FIG. 2. C, D...Transmission/reception devices 11a, 11b...Transmission line 12.14...Transmission interface 13.15...Reception interface 16...Current source 21...Rechargeable power supply 22...First I! I'I conduction section 23... Constant voltage diode 24... Charging section 12- Fig. 2 Fig. 8

Claims (1)

【特許請求の範囲】[Claims] 送信情報に応じた断続電流信号を受信する２つの送受信
装置と、これら送受信装置相互間に単一のカレントルー
プを形成して前記電流信号を伝送する伝送路とを有し、
前記送受信装置の一方の動作電源を、前記伝送路を流れ
る電流から電圧を発生する手段とこの電圧で充電され前
記電流信号の断時間に前記電圧をバックアップする充電
手段とを備える充電式電源によって得ることを特徴とす
るカレントループ伝送方式。It has two transmitting and receiving devices that receive intermittent current signals according to transmitted information, and a transmission line that forms a single current loop between these transmitting and receiving devices and transmits the current signal,
The operating power source for one of the transmitting and receiving devices is obtained by a rechargeable power source comprising means for generating a voltage from the current flowing through the transmission line, and charging means that is charged with this voltage and backs up the voltage when the current signal is interrupted. A current loop transmission method characterized by:
JP10182083A 1983-06-09 1983-06-09 Current loop transmission system Pending JPS59228451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10182083A JPS59228451A (en) 1983-06-09 1983-06-09 Current loop transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10182083A JPS59228451A (en) 1983-06-09 1983-06-09 Current loop transmission system

Publications (1)

Publication Number Publication Date
JPS59228451A true JPS59228451A (en) 1984-12-21

Family

ID=14310751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10182083A Pending JPS59228451A (en) 1983-06-09 1983-06-09 Current loop transmission system

Country Status (1)

Country Link
JP (1) JPS59228451A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6290577A (en) * 1985-07-11 1987-04-25 Chino Corp Receiving instrument for signal transmission line
JPS6460131A (en) * 1987-08-31 1989-03-07 Matsushita Electric Ind Co Ltd Signal transmitter
WO2010032637A1 (en) 2008-09-22 2010-03-25 ダイキン工業株式会社 Communication module, communication system and air conditioner
JP2010183341A (en) * 2009-02-05 2010-08-19 Daikin Ind Ltd Communication module, queuing method for communication model and abnormality determination method of communication system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6290577A (en) * 1985-07-11 1987-04-25 Chino Corp Receiving instrument for signal transmission line
JPS6460131A (en) * 1987-08-31 1989-03-07 Matsushita Electric Ind Co Ltd Signal transmitter
WO2010032637A1 (en) 2008-09-22 2010-03-25 ダイキン工業株式会社 Communication module, communication system and air conditioner
US8856403B2 (en) 2008-09-22 2014-10-07 Daikin Industries, Ltd. Communication module, communication system and air conditioner
DE202009019030U1 (en) 2008-09-22 2015-09-01 Daikin Industries, Ltd. Communication module, communication system and air conditioning
JP2010183341A (en) * 2009-02-05 2010-08-19 Daikin Ind Ltd Communication module, queuing method for communication model and abnormality determination method of communication system

Similar Documents

Publication Publication Date Title
JP4573250B2 (en) Method and apparatus for performing bi-directional communication using a single wire
US5990577A (en) Hub for local area network with backup power supply system
GB2123589A (en) Data reporting system
US10869347B2 (en) Wireless pairing system and method
US20220037904A1 (en) Energy storage power supply, parallel control device for energy storage power supplies, and parallel control method for energy storage power supplies
AU733110B2 (en) Repeater apparatus having isolation circuit
JPS59228451A (en) Current loop transmission system
KR101650838B1 (en) A electronic unit of vehicle connected to can bus and method for waking-up the electronic unit of vehicle
US9713960B2 (en) On-board charger housekeeping power supply with automatic source transition
JPH0237736B2 (en)
JPH05137270A (en) Charging equipment
JPH1094074A (en) Lighting monitor and control system
WO2023071520A1 (en) Electric tool, mower, data communication method, battery pack and tool system
KR100224996B1 (en) System halt method for facsimile
JPH0129878Y2 (en)
JP3387804B2 (en) Interface circuit
KR19980023323U (en) Power management network management device of subscriber system
JPS62123894A (en) Remote supervisory and controlling equipment
JPH11284551A (en) One-way communication method from plural transmitters to single receiver
JPH0626338U (en) Layer 1 connection detection circuit
KR200212091Y1 (en) Tele-remote controller
JP2901158B2 (en) Uninterruptible power system
JPH0779355B2 (en) Signal transmission device
JPS639416B2 (en)
JPS59208960A (en) Data transmitter