JPH0226422B2 - - Google Patents
Info
- Publication number
- JPH0226422B2 JPH0226422B2 JP22798985A JP22798985A JPH0226422B2 JP H0226422 B2 JPH0226422 B2 JP H0226422B2 JP 22798985 A JP22798985 A JP 22798985A JP 22798985 A JP22798985 A JP 22798985A JP H0226422 B2 JPH0226422 B2 JP H0226422B2
- Authority
- JP
- Japan
- Prior art keywords
- line
- input terminal
- relay
- receiver
- input
- 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.)
- Expired
Links
- 238000004891 communication Methods 0.000 claims description 10
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は商用電源線を用いた通信装置における
受信機の入力回路に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an input circuit of a receiver in a communication device using a commercial power line.
「従来の技術」
商用電源線を通信線として用いる通信装置が知
れている。そして、通信線の利用の方法によつ
て、線間方式と大地帰路方式がある。線間方式は
配電線（電源線）間に送信信号を注入するもの
で、電源線に接続されている負荷の状態によつて
送信信号に影響を受ける場合があるが、接続に際
し極性を考慮する必要がない。大地帰路方式は電
源線の非活性線に送信信号を注入するもので、電
源線に接続されている負荷の状態による送信信号
の影響は少いが、受信機の接続に際しその極性
（いずれが非活性線か）を判別しなければならず
手数がかかつた。また設置後において配電線の工
事等によりコンセントへの接続極性が反転されて
しまう恐れがあり、その場合は接続替えを行う必
要があつたりするという問題点があつた。"Prior Art" Communication devices that use commercial power lines as communication lines are known. Depending on how communication lines are used, there are line-to-line methods and ground return methods. The line-to-line method injects the transmission signal between the distribution lines (power supply lines), and the transmission signal may be affected by the condition of the load connected to the power supply line, but the polarity should be taken into account when connecting. There's no need. The ground return method injects the transmitted signal into the non-active line of the power line, and the transmitted signal is less affected by the condition of the load connected to the power line, but when connecting the receiver, the polarity (which one is non-active) It took a lot of effort to determine whether it was an active line or not. Further, after installation, there is a risk that the polarity of the connection to the outlet may be reversed due to construction work on the power distribution line, and in that case, there is a problem in that it may be necessary to change the connection.
第２図は、大地帰路方式の原理を説明する略線
的接続図である。 FIG. 2 is a schematic connection diagram illustrating the principle of the earth return method.
１は電源トランス、５は配電線で例えば単相二
線式の配電方式の場合は、接地線６と接続されて
いる非活性線５ａの他方のいずれか一方の線路が
商用電源線として使用され、それらの２線がコン
セントに接続されている。２は送信機、３は送信
機２の出力信号を非活性線に注入するための注入
トランス、４は受信機である。すなわち、非活性
線５ａと接地間で構成されるループ中に送信機２
と受信機４を接続し、信号の伝達を行うように成
されている。従つて受信機４の一方の入力端子は
接地側へ、他方の入力端子はコンセント等を介し
て非活性線５ａと接続しなければならない。しか
しながらこの接続には前述した問題点があつた。 1 is a power transformer, and 5 is a distribution line. For example, in the case of a single-phase two-wire power distribution system, one of the lines other than the inactive line 5a connected to the grounding line 6 is used as a commercial power line. , those two wires are connected to the outlet. 2 is a transmitter, 3 is an injection transformer for injecting the output signal of the transmitter 2 into a non-active line, and 4 is a receiver. That is, the transmitter 2 is connected to the loop formed between the inactive line 5a and the ground
and the receiver 4 to transmit signals. Therefore, one input terminal of the receiver 4 must be connected to the ground side, and the other input terminal must be connected to the inactive line 5a via an outlet or the like. However, this connection has the problems mentioned above.
「発明が解決しようとする問題点」
本発明は受信機の接続に際し、極性の判別が必
要でなく、かつ、配電線の工事等によつてコンセ
ントへの接続極性が反転した場合でも接続替えの
必要がない受信機の入力回路を得ようとするもの
である。"Problems to be Solved by the Invention" The present invention does not require polarity determination when connecting a receiver, and even if the polarity of the connection to the outlet is reversed due to construction of the distribution line, etc., the connection can be changed. This is an attempt to obtain an input circuit for a receiver that is not necessary.
「問題点を解決するための手段」
そのため本発明は商用電源線の非活性線に注入
された送信機からの信号を受信する受信機の入力
回路において、商用電源線間に接続される一対の
入力端子と、該入力端子に接続されてそのいずれ
か一方と切替接続する接点を有する継電器と、上
上記切替接続された入力端子と接地間の電圧によ
つてON、OFFするように接続したフオトカプラ
とを備え、該フオトカプラの状態によつて上記継
電器を駆動し、上記接点を介して受信制御部の一
方の入力端子が非活性線と接続されるようにした
ものである。``Means for Solving the Problems'' Therefore, the present invention provides an input circuit for a receiver that receives a signal from a transmitter injected into a non-active line of a commercial power line. A relay having an input terminal, a contact connected to the input terminal and switchingly connected to one of the input terminals, and a photocoupler connected so as to be turned on and off depending on the voltage between the above-mentioned switch-connected input terminal and ground. The relay is driven according to the state of the photocoupler, and one input terminal of the reception control section is connected to the inactive line via the contact.
「作用」
受信制御部の非活性線と接続される一方の入力
端子が、継電器の接点を介して選択的に上記非活
性線と接続されるように構成したので、受信機の
設置に際し、極性の判別が必要でなく、かつ設置
後における配電線の工事等によつて極性の反転が
あつても、自動的に切替接続されるので通信が不
能となる等の不都合もない。"Operation" Since one input terminal connected to the non-active line of the reception control unit is configured to be selectively connected to the above-mentioned non-active line via the contact of the relay, when installing the receiver, the polarity It is not necessary to determine whether the polarity is the same, and even if the polarity is reversed due to construction of the distribution line after installation, the connection is automatically switched and there is no inconvenience such as communication being disabled.
「実施例」
第１図は本発明による受信機の入力回路を説明
するブロツク図である。第２図と同一のものは同
じ符号を付してわかり易くした。７は受信制御部
で、送信機２からの送信信号を受信し、必要に応
じて送信機２へ応答信号を送出するように構成さ
れており、回路構成は従来と変らない。７ａ，７
ｂはそれぞれその入力端子である。９はフオトカ
プラ、８はフオトカプラ保護用ダイオード、１０
は継電器、１０ａはその接点である。１１は継電
器駆動回路で、その入力端子１１ａに低電位
（「０」）が与えられると動作し、その都度継電器
１０を反転（動作又は復旧）させて、その状態を
保持するように構成されている。Embodiment FIG. 1 is a block diagram illustrating an input circuit of a receiver according to the present invention. Components that are the same as those in FIG. 2 are given the same reference numerals for easy understanding. Reference numeral 7 denotes a reception control section, which is configured to receive a transmission signal from the transmitter 2 and send a response signal to the transmitter 2 as necessary, and the circuit configuration is the same as before. 7a, 7
b is its input terminal, respectively. 9 is a photocoupler, 8 is a photocoupler protection diode, 10
is a relay, and 10a is its contact. Reference numeral 11 denotes a relay drive circuit, which operates when a low potential ("0") is applied to its input terminal 11a, and is configured to invert (operate or restore) the relay 10 each time and maintain that state. There is.
すなわち、継電器１０が不動作状態において、
入力端子１０ａに「０」が与えられると、継電器
駆動回路１１は継電器１０を動作状態とし、それ
を保持する。次に入力端子１０ａに「０」が与え
られると継電器１０を復旧させるように回路が構
成されており、例えば電圧検出回路、フリツプフ
ロツプ回路等によつて構成することができる。１
０ａは継電器１０の接点で一対の入力端子４ａ，
４ｂのいずれか一方が受信制御部７の入力端子７
ａと接続されるように成されている。上記一対の
入力端子４ａ，４ｂは配電線５の２線間、すなわ
ち、非活性線５ａと活性線５ｂに接続される。 That is, when the relay 10 is in an inoperable state,
When "0" is applied to the input terminal 10a, the relay drive circuit 11 puts the relay 10 into the operating state and maintains it. Next, a circuit is configured to restore the relay 10 when "0" is applied to the input terminal 10a, and can be configured by, for example, a voltage detection circuit, a flip-flop circuit, or the like. 1
0a is a contact point of the relay 10 and a pair of input terminals 4a,
4b is the input terminal 7 of the reception control section 7.
It is configured to be connected to a. The pair of input terminals 4a and 4b are connected between two wires of the power distribution line 5, that is, a non-active line 5a and an active line 5b.
一方、受信制御部７の入力端子７ｂは従来と同
様に接地される。１２は絶縁耐圧用コンデンサ、
１３はカツプリングコンデンサ、１４，１５は回
路保護用抵抗器である。 On the other hand, the input terminal 7b of the reception control section 7 is grounded as in the conventional case. 12 is an insulation voltage capacitor,
13 is a coupling capacitor, and 14 and 15 are circuit protection resistors.
次に動作について説明する。 Next, the operation will be explained.
配電線５（商用電源線）に接続される一対の入
力端子４ａ，４ｂが第２図のごとく接続された場
合、すなわち入力端子４ａに非活性線５ａが、入
力端子４ｂに活性線５ｂが接続されたときは、フ
オトカプラ９はONとならないので、継電器駆動
回路１１の入力端子１１ａは高電位（「１」）のま
まであるから継電器１０の状態（不動作）は変化
しない。従つて受信制御部７の一方の入力端子７
ａは、コンデンサ１３、接点１０ａ（k2）入力端
子４ａを介して非活性線５ａに接続され、送信機
２との間で信号の送受信が可能となる。次にその
後、配電線５の工事等によつてその極性が転し、
入力端子４ａが活性線５ｂに、入力端子４ｂが非
活性線５ａに接続された場合は、入力端子４ａと
接地との間に交流電圧（100V）が加わるので、
入力端子４ａ、接点１０ａ（k2）、抵抗器１４コン
デンサ１２、フオトカプラ９、接Ｇの経路で断続
的に電流が流れ、フオトカプラ９はそれに応じて
ONとなる。従つて継電器駆動回路１１の入力端
子１１ａに「０」が与えられるので、継電器駆動
回路１１は動作（上記「０」を複数回検出するこ
とによつて動作するようにすれば、ノイズ等によ
る誤動作を防止できる。この場合、入力回路にカ
ウンター回路等を設ければよいが、その回路自体
は一般的なので詳述しない。）し、継電器１０を
それまでの状態（不動作）から反転、すわち動作
させ、それを保持する。これによつて接点１０ａ
が切替る。従つて、受信制御部７の入力端子７ａ
は再び非活性線５ａと接続され、送信機２との間
で信号の送受信が可能となる。 When a pair of input terminals 4a and 4b connected to the power distribution line 5 (commercial power line) are connected as shown in Fig. 2, in other words, the inactive line 5a is connected to the input terminal 4a, and the active line 5b is connected to the input terminal 4b. When this occurs, the photocoupler 9 does not turn on, and the input terminal 11a of the relay drive circuit 11 remains at a high potential ("1"), so the state (non-operation) of the relay 10 does not change. Therefore, one input terminal 7 of the reception control section 7
a is connected to the non-active line 5a via the capacitor 13, the contact 10a (k 2 ) input terminal 4a, and can transmit and receive signals to and from the transmitter 2. Then, the polarity is reversed due to construction work on the distribution line 5, etc.
When the input terminal 4a is connected to the active line 5b and the input terminal 4b is connected to the inactive line 5a, an AC voltage (100V) is applied between the input terminal 4a and the ground, so
Current flows intermittently through the input terminal 4a, contact 10a (k 2 ), resistor 14 capacitor 12, photocoupler 9, and connection G, and the photocoupler 9 responds accordingly.
It becomes ON. Therefore, since "0" is given to the input terminal 11a of the relay drive circuit 11, the relay drive circuit 11 operates (if the relay drive circuit 11 is operated by detecting the above-mentioned "0" multiple times, it will not malfunction due to noise etc.) (In this case, a counter circuit or the like may be provided in the input circuit, but the circuit itself is common and will not be described in detail.) Then, the relay 10 can be reversed from its previous state (inoperative), that is Make it work and hold it. As a result, contact 10a
is switched. Therefore, the input terminal 7a of the reception control section 7
is again connected to the inactive line 5a, and signals can be transmitted and received with the transmitter 2.
上述の説明では、一対の入力端子４ａ，４ｂを
配電線５へ接続した後に逆極性となつた場合を説
明したが、設置に際して最初から逆極性に接続し
た場合も同様に継電器駆動回路１１が動作し、入
力端子７ａが非活性線５ａと接続されることは、
容易に理解できよう。 In the above explanation, the case where the pair of input terminals 4a and 4b are connected to the distribution line 5 and then the polarity becomes reversed is explained, but the relay drive circuit 11 operates in the same way even if the polarity is reversed from the beginning during installation. However, the fact that the input terminal 7a is connected to the non-active line 5a means that
It's easy to understand.
「発明の効果」
以上説明したように本発明によれば受信機の設
置に際し、通信線となる配電線（商用電源線）の
極性判別が必要でなく、かつ設置後における配電
線の工事による極性の反転に対しても自動的に正
極性に接続されるので接続切換えの手数が省け、
実用的効果が顕著である。"Effects of the Invention" As explained above, according to the present invention, when installing a receiver, it is not necessary to determine the polarity of the power distribution line (commercial power line) that serves as a communication line, and the polarity cannot be determined due to construction of the power distribution line after installation. Even when the polarity is reversed, it is automatically connected to the positive polarity, saving you the trouble of switching connections.
The practical effect is remarkable.
第１図は本発明による受信機の入力回路を説明
するブロツク図、第２図は商用電源線を通信線と
して用いた通信装置の大地帰路方式の原理を説明
する略線的接続図である。
１……電源トランス、２……送信機、３……注
入トランス、４……受信機、５……配電線、７…
…受信制御部、９……フオトカプラ、１０……継
電器、１１……継電器駆動回路。
FIG. 1 is a block diagram illustrating an input circuit of a receiver according to the present invention, and FIG. 2 is a schematic connection diagram illustrating the principle of a return-to-ground system for a communication device using a commercial power line as a communication line. 1... Power transformer, 2... Transmitter, 3... Injection transformer, 4... Receiver, 5... Distribution line, 7...
...Reception control unit, 9...Photocoupler, 10...Relay, 11...Relay drive circuit.
Claims (1)
らの信号を受信する受信機の入力回路において、
商用電源線間に接続される一対の入力端子と、該
入力端子に接続されてそのいずれか一方と切替接
続する接点を有する継電器と、上記切替接続され
た入力端子と接地間の電圧によつてON、OFFす
るように接続したフオトカプラとを備え、該フオ
トカプラの状態によつて上記継電器を駆動し、上
記接点を介して受信制御部の一方の入力端子が非
活性線と接続されるようにしたことを特徴とする
商用電源線を通信線として用いた通信装置におけ
る受信機の入力回路。1. In the input circuit of the receiver that receives the signal from the transmitter injected into the inactive line of the commercial power line,
A relay having a pair of input terminals connected between commercial power lines, a contact connected to the input terminals and switchingly connected to one of the input terminals, and a voltage between the switched input terminals and ground. and a photocoupler connected to turn on and off, the relay is driven according to the state of the photocoupler, and one input terminal of the reception control section is connected to the inactive line via the contact. An input circuit for a receiver in a communication device using a commercial power line as a communication line, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22798985A JPS6286929A (en) | 1985-10-14 | 1985-10-14 | Input circuit for receiving set in communication equipment using commercial power source line as communication line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22798985A JPS6286929A (en) | 1985-10-14 | 1985-10-14 | Input circuit for receiving set in communication equipment using commercial power source line as communication line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6286929A JPS6286929A (en) | 1987-04-21 |
| JPH0226422B2 true JPH0226422B2 (en) | 1990-06-11 |
Family
ID=16869419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22798985A Granted JPS6286929A (en) | 1985-10-14 | 1985-10-14 | Input circuit for receiving set in communication equipment using commercial power source line as communication line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286929A (en) |
-
1985
- 1985-10-14 JP JP22798985A patent/JPS6286929A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6286929A (en) | 1987-04-21 |
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