JPH03125530U - - Google Patents
Info
- Publication number
- JPH03125530U JPH03125530U JP3487190U JP3487190U JPH03125530U JP H03125530 U JPH03125530 U JP H03125530U JP 3487190 U JP3487190 U JP 3487190U JP 3487190 U JP3487190 U JP 3487190U JP H03125530 U JPH03125530 U JP H03125530U
- Authority
- JP
- Japan
- Prior art keywords
- output
- processing circuit
- overcurrent
- circuit
- signal processing
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
- Keying Circuit Devices (AREA)
Description
第１図は本考案の一実施例による光電スイツチ
の構成を示すブロツク図、第２図は短絡保護処理
回路とその周辺の詳細な構成を示す回路図、第３
図は本実施例の動作を示すタイムチヤート、第４
図は従来の光電スイツチの出力部の一例を示すブ
ロツク図、第５図はその動作を示すタイムチヤー
トである。
１１……発振回路、１２……投光素子、１３…
…受光素子、１５……信号処理回路、１６……出
力回路、１８……過電流検出手段、１９……短絡
保護処理回路、２０……フリツプフロツプ、Ｑ１
……スイツチングトタンジスタ。
FIG. 1 is a block diagram showing the configuration of a photoelectric switch according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing the detailed configuration of a short-circuit protection processing circuit and its surroundings, and FIG.
The figure is a time chart showing the operation of this embodiment.
The figure is a block diagram showing an example of the output section of a conventional photoelectric switch, and FIG. 5 is a time chart showing its operation. 11...Oscillation circuit, 12...Light emitter, 13...
... Light receiving element, 15 ... Signal processing circuit, 16 ... Output circuit, 18 ... Overcurrent detection means, 19 ... Short circuit protection processing circuit, 20 ... Flip-flop, Q1
……Switching Totanister.
Claims (1)
出力に基づいてパルス点灯される投光素子と、前
記投光素子から得られる信号を受光する受光素子
と、前記受光素子の出力に基づいて物体検知信号
を出力する信号処理回路と、前記信号処理回路の
出力によつて付勢され負荷及び電源に直列接続さ
れるスイツチング素子と、を具備する光電スイツ
チにおいて、 前記スイツチング素子の過電流を検出する過電
流検出手段と、 前記過電流検出手段の出力に基づいて付勢され
前記スイツチング素子をオフとすると共に、前記
発振回路の出力に基づいて短絡保護動作を停止す
る短絡保護処理回路と、を具備することを特徴と
する光電スイツチ。[Claims for Utility Model Registration] An oscillation circuit that generates a clock signal, a light emitting element that is lit in pulses based on the oscillation output, a light receiving element that receives a signal obtained from the light emitting element, and the light receiving element. A photoelectric switch comprising: a signal processing circuit that outputs an object detection signal based on the output of the signal processing circuit; and a switching element energized by the output of the signal processing circuit and connected in series to a load and a power source, the switching element overcurrent detection means for detecting an overcurrent of the overcurrent; and short circuit protection that is energized based on the output of the overcurrent detection means to turn off the switching element and stops the short circuit protection operation based on the output of the oscillation circuit. A photoelectric switch comprising a processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3487190U JPH03125530U (en) | 1990-03-30 | 1990-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3487190U JPH03125530U (en) | 1990-03-30 | 1990-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03125530U true JPH03125530U (en) | 1991-12-18 |
Family
ID=31539724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3487190U Pending JPH03125530U (en) | 1990-03-30 | 1990-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03125530U (en) |
-
1990
- 1990-03-30 JP JP3487190U patent/JPH03125530U/ja active Pending
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