JPH042936U - - Google Patents
Info
- Publication number
- JPH042936U JPH042936U JP4253090U JP4253090U JPH042936U JP H042936 U JPH042936 U JP H042936U JP 4253090 U JP4253090 U JP 4253090U JP 4253090 U JP4253090 U JP 4253090U JP H042936 U JPH042936 U JP H042936U
- Authority
- JP
- Japan
- Prior art keywords
- relay drive
- drive circuit
- overcurrent
- relay
- abnormality
- 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
- 230000005856 abnormality Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図乃至第６図はこの考案に係る過電流検出
機能付きリレー駆動回路の実施例を示し、第１図
は機能ブロツク図、第２図は回路図、第３図は過
電流状態時を示すタイミングチヤート、第４図は
複数のリレー駆動回路の中より異常を判別する表
示信号のタイミングチヤート、第５図は他の実施
例の部分回路図、第６図はフローチヤートである
。第７図は従来例の回路図である。
主な符号の説明、１……マイクロコンピユータ
、Ｑ１，Ｑ１′……過電流検出トランジスタ、Ｑ
１２，Ｑ１２′……リレー駆動用トランジスタ、
Ｄ１……発光ダイオード、Ｒ２，Ｒ２′……電流
／電圧変換抵抗。
1 to 6 show an embodiment of the relay drive circuit with an overcurrent detection function according to this invention. FIG. 1 is a functional block diagram, FIG. 2 is a circuit diagram, and FIG. FIG. 4 is a timing chart of a display signal for determining an abnormality among a plurality of relay drive circuits, FIG. 5 is a partial circuit diagram of another embodiment, and FIG. 6 is a flow chart. FIG. 7 is a circuit diagram of a conventional example. Explanation of main symbols, 1...Microcomputer, Q1 , Q1 '...Overcurrent detection transistor, Q
12 , Q12 '...Relay driving transistor,
D1 ...Light emitting diode, R2 , R2 '...Current/voltage conversion resistor.
Claims (1)
リレー駆動回路と、このリレー駆動回路のＯＮ／
ＯＦＦ制御を行うリレー駆動信号出力手段を有し
たマイクロコンピユータとで構成されたリレー駆
動回路において、 前記トランジスタ或はＦＥＴで構成されたリレ
ー駆動回路の過電流を検出する過電流検出手段と
、この過電流検出手段によつて過電流を遮断する
ためにリレー駆動回路へのＯＮ信号をＯＦＦにす
る過電流遮断手段と、リレー駆動回路をＯＦＦ状
態にするリレー駆動回路遮断手段と、過電流異常
を表示装置に表示させる異常表示出力手段とを設
け、前記リレー駆動信号出力手段でリレー駆動回
路が動作中に過電流検出手段がリレー駆動回路に
流れる過電流を検出し、過電流遮断手段によつて
異常と判断したときには、リレー駆動回路遮断手
段によりリレー駆動回路のリレー駆動動作を停止
させ且つ、異常表示出力手段によつて表示装置に
異常の表示をさせるように構成したことを特徴と
する過電流防止機能付きリレー駆動回路。 ２ トランジスタ或はＦＥＴで構成された複数の
リレー駆動回路において、 上記複数のリレー駆動回路の中、どのリレー駆
動回路が過電流になつて出力を遮断状態にしたか
を表示装置に表示するように構成したことを特徴
とする請求項１記載の過電流防止機能付きリレー
駆動回路。[Claims for Utility Model Registration] 1. A relay drive circuit composed of transistors or FETs, and ON/OFF of this relay drive circuit.
A relay drive circuit comprising a microcomputer having a relay drive signal output means for performing OFF control, and an overcurrent detection means for detecting an overcurrent in the relay drive circuit comprising the transistor or FET; Overcurrent cutoff means turns off the ON signal to the relay drive circuit in order to cut off the overcurrent by the current detection means, relay drive circuit cutoff means turns the relay drive circuit into the OFF state, and displays an overcurrent abnormality. an abnormality display output means for displaying on the device, the overcurrent detection means detects an overcurrent flowing in the relay drive circuit while the relay drive circuit is operating by the relay drive signal output means, and the overcurrent cutoff means detects an abnormality. The overcurrent prevention method is characterized in that, when it is determined that the relay driving circuit has failed, the relay driving circuit is stopped by the relay driving circuit cutoff means, and the abnormality is displayed on the display device by the abnormality display output means. Functional relay drive circuit. 2. In a plurality of relay drive circuits composed of transistors or FETs, the display device displays which relay drive circuit among the plurality of relay drive circuits has overcurrent and cut off its output. 2. A relay drive circuit with an overcurrent prevention function according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253090U JPH042936U (en) | 1990-04-23 | 1990-04-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4253090U JPH042936U (en) | 1990-04-23 | 1990-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH042936U true JPH042936U (en) | 1992-01-10 |
Family
ID=31554156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4253090U Pending JPH042936U (en) | 1990-04-23 | 1990-04-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015230879A (en) * | 2014-06-06 | 2015-12-21 | パナソニックＩｐマネジメント株式会社 | Switch device and load control system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63314124A (en) * | 1987-06-12 | 1988-12-22 | Komatsu Ltd | Output circuit protective apparatus for electronic equipment |
-
1990
- 1990-04-23 JP JP4253090U patent/JPH042936U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63314124A (en) * | 1987-06-12 | 1988-12-22 | Komatsu Ltd | Output circuit protective apparatus for electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015230879A (en) * | 2014-06-06 | 2015-12-21 | パナソニックＩｐマネジメント株式会社 | Switch device and load control system |
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