JPH0485845U - - Google Patents
Info
- Publication number
- JPH0485845U JPH0485845U JP12580990U JP12580990U JPH0485845U JP H0485845 U JPH0485845 U JP H0485845U JP 12580990 U JP12580990 U JP 12580990U JP 12580990 U JP12580990 U JP 12580990U JP H0485845 U JPH0485845 U JP H0485845U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- photocoupler
- stage
- receiving section
- signal
- 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
Links
Landscapes
- Optical Communication System (AREA)
- Small-Scale Networks (AREA)
Description
第１図は本考案の実施例による伝送制御回路の
構成を示す回路図、第２図は従来の伝送制御回路
の構成を示す回路図である。
主要部分の符号の説明、１……信号源、２……
伝送路、３〜５……端末、６〜１１……フオトカ
プラ、１２〜１４……発光ダイオード、１５〜１
７……オア回路。
FIG. 1 is a circuit diagram showing the configuration of a transmission control circuit according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing the configuration of a conventional transmission control circuit. Explanation of symbols of main parts, 1...Signal source, 2...
Transmission line, 3-5...terminal, 6-11...photocoupler, 12-14...light-emitting diode, 15-1
7...OR circuit.
Claims (1)
カプラを各段が有し、前段からの信号が自段の発
光部に入力され、該信号を後段の発光部へ伝達し
てループ伝送路を形成し、これらフオトカプラの
各受光部の出力を自段の受信信号とする伝送制御
回路であつて、前記発光部に対して並列に接続さ
れた発光部を有する予備フオトカプラと、前記現
用フオトカプラが故障したとき前記予備フオトカ
プラによりループ伝送路を形成し、その受光部の
出力を受信信号とするよう制御する制御手段とを
含むことを特徴とする伝送制御回路。 (2) 前記制御手段は、前記予備フオトカプラの
受光部に直列接続された発光ダイオードであるこ
とを特徴とする請求項(1)記載の伝送制御回路。[Claims for Utility Model Registration] (1) Each stage has a currently used photocoupler in which light emitting parts are connected in series, and a signal from the previous stage is input to the light emitting part of the own stage, and the signal is sent to the light emitting part of the subsequent stage. A backup photocoupler, which is a transmission control circuit that transmits signals to form a loop transmission path and uses the output of each light receiving section of these photocouplers as a reception signal of its own stage, and has a light emitting section connected in parallel to the light emitting section. and a control means for forming a loop transmission path using the standby photocoupler when the working photocoupler breaks down, and controlling the output of the light receiving section to be used as a reception signal. (2) The transmission control circuit according to claim 1, wherein the control means is a light emitting diode connected in series to the light receiving section of the standby photocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12580990U JPH0485845U (en) | 1990-11-28 | 1990-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12580990U JPH0485845U (en) | 1990-11-28 | 1990-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0485845U true JPH0485845U (en) | 1992-07-27 |
Family
ID=31873394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12580990U Pending JPH0485845U (en) | 1990-11-28 | 1990-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0485845U (en) |
-
1990
- 1990-11-28 JP JP12580990U patent/JPH0485845U/ja active Pending
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