JPS61154026U - - Google Patents
Info
- Publication number
- JPS61154026U JPS61154026U JP3606485U JP3606485U JPS61154026U JP S61154026 U JPS61154026 U JP S61154026U JP 3606485 U JP3606485 U JP 3606485U JP 3606485 U JP3606485 U JP 3606485U JP S61154026 U JPS61154026 U JP S61154026U
- Authority
- JP
- Japan
- Prior art keywords
- switch
- open
- predetermined current
- input circuit
- diode
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
Landscapes
- Input From Keyboards Or The Like (AREA)
- Electronic Switches (AREA)
Description
第1図は本考案による入力回路の一実施例を示
した回路図、第2図は本考案の他の実施例を示し
た回路図、第3図は第2図の実施例の変形を示し
た回路図、第4図は第2図の実施例の変形を示し
た他の回路図である。
1……リミツトスイツチ、2,4……抵抗、5
……フオトカプラ、6……読取回路、8……フオ
トカプラ、9……断線診断回路、7……ダイオー
ド、11……抵抗、12……トランジスタ、13
……トランジスタ、14……インバータ、15…
…ダイオードブリツジ。
Fig. 1 is a circuit diagram showing one embodiment of the input circuit according to the present invention, Fig. 2 is a circuit diagram showing another embodiment of the invention, and Fig. 3 is a modification of the embodiment of Fig. 2. FIG. 4 is another circuit diagram showing a modification of the embodiment shown in FIG. 1... Limit switch, 2, 4... Resistance, 5
... Photocoupler, 6 ... Reading circuit, 8 ... Photocoupler, 9 ... Disconnection diagnosis circuit, 7 ... Diode, 11 ... Resistor, 12 ... Transistor, 13
...Transistor, 14...Inverter, 15...
...Diode bridge.
Claims (1)
て、前記スイツチが開の時でも所定の電流が流れ
るように該スイツチに並列に接続されたインピー
ダンスまたはダイオードと、前記所定の電流を検
出し回路の断線を検出する手段を備えたことを特
徴とする入力回路。 In an input circuit that detects the open/closed state of a switch, an impedance or a diode is connected in parallel to the switch so that a predetermined current flows even when the switch is open, and the predetermined current is detected to detect a circuit break. An input circuit characterized by comprising a means for.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3606485U JPS61154026U (en) | 1985-03-15 | 1985-03-15 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3606485U JPS61154026U (en) | 1985-03-15 | 1985-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61154026U true JPS61154026U (en) | 1986-09-24 |
Family
ID=30540913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3606485U Pending JPS61154026U (en) | 1985-03-15 | 1985-03-15 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61154026U (en) |
-
1985
- 1985-03-15 JP JP3606485U patent/JPS61154026U/ja active Pending
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