JPS59177256U - digital input device - Google Patents
digital input deviceInfo
- Publication number
- JPS59177256U JPS59177256U JP7082683U JP7082683U JPS59177256U JP S59177256 U JPS59177256 U JP S59177256U JP 7082683 U JP7082683 U JP 7082683U JP 7082683 U JP7082683 U JP 7082683U JP S59177256 U JPS59177256 U JP S59177256U
- Authority
- JP
- Japan
- Prior art keywords
- input signal
- circuit
- output circuit
- input
- output
- 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
- Arrangements For Transmission Of Measured Signals (AREA)
- Dc Digital Transmission (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来技術であり、第２図はこの考案の具体的実
施例であり、第３図は第２図のスイッチ回路に入力され
る読出指令を示したものである。
１０・・・インピーダンス要素、１２・・・入力信号保
持要素、１３・・・スイッチ回路、４・・・出力回路。FIG. 1 shows the prior art, FIG. 2 shows a specific embodiment of this invention, and FIG. 3 shows a read command input to the switch circuit of FIG. 2. 10... Impedance element, 12... Input signal holding element, 13... Switch circuit, 4... Output circuit.
Claims (1)
、フォトカプラを有し上記入力信号とは絶縁された出力
信号を出力する出力回路と、上記入力端子と上記出力回
路との間に接続された電流ルリ限要素とより成るデジタ
ル入力装置において、上記入力端子間に接続され上記入
力信号受信時に所定の電流を入力信号源回路側に流すイ
ンピーダンス要素と、上記出力回路に直列に接続され読
出指令のある時のみオンとなるスイッチ回路と、該スイ
ッチ回路と上記出力回路の直列回路と上記電流制限要素
との間に設けられる電圧制限要素と上記入力信号を保持
する入力信号保持要素とを具備１２、上記読出指令のあ
る時のみ上記出力回路内のフォトカプラに上記入力信号
保持要素に保持された入力信号が流れるようにしたこと
を特徴とするデジタル入力装置。A pair of input terminals that receive a DC or AC input signal, an output circuit that has a photocoupler and outputs an output signal that is isolated from the input signal, and is connected between the input terminal and the output circuit. an impedance element connected between the input terminals and causing a predetermined current to flow toward the input signal source circuit when receiving the input signal; and an impedance element connected in series with the output circuit and configured to command readout. A switch circuit that is turned on only at certain times, a voltage limiting element provided between the switch circuit, a series circuit of the output circuit, and the current limiting element, and an input signal holding element that holds the input signal. . A digital input device, wherein the input signal held in the input signal holding element flows through the photocoupler in the output circuit only when the read command is received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7082683U JPS59177256U (en) | 1983-05-12 | 1983-05-12 | digital input device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7082683U JPS59177256U (en) | 1983-05-12 | 1983-05-12 | digital input device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59177256U true JPS59177256U (en) | 1984-11-27 |
Family
ID=30200976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7082683U Pending JPS59177256U (en) | 1983-05-12 | 1983-05-12 | digital input device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59177256U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018007135A (en) * | 2016-07-06 | 2018-01-11 | 富士電機株式会社 | Signal transfer circuit and instrumentation device |
-
1983
- 1983-05-12 JP JP7082683U patent/JPS59177256U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018007135A (en) * | 2016-07-06 | 2018-01-11 | 富士電機株式会社 | Signal transfer circuit and instrumentation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS59177256U (en) | digital input device | |
| JPS5914426U (en) | input circuit | |
| JPS6074320U (en) | Electronic equipment output switching circuit | |
| JPS58165661U (en) | measuring device | |
| JPS5877930U (en) | analog switch | |
| JPS5933315U (en) | current voltage conversion circuit | |
| JPS59174611U (en) | Constant voltage power supply circuit | |
| JPS60109197U (en) | signal converter | |
| JPS6026753U (en) | relay circuit | |
| JPS5815222U (en) | DC power supply | |
| JPS5944133U (en) | Abnormal current detection device | |
| JPS58156277U (en) | Current-voltage conversion circuit for current transformers | |
| JPS5890748U (en) | Voltage comparator protection circuit | |
| JPS58161313U (en) | High input impedance amplifier circuit | |
| JPS58184930U (en) | Transistor switching circuit | |
| JPS5956853U (en) | Muting circuit | |
| JPS586436U (en) | switching device | |
| JPS6081669U (en) | Magnetoelectric conversion element circuit | |
| JPS59164946U (en) | power control device | |
| JPS6039126U (en) | current source circuit | |
| JPS58183521U (en) | constant current power supply | |
| JPS5911362U (en) | Differential circuit using relay | |
| JPS59126547U (en) | Signal superimposition transmission device | |
| JPS6067936U (en) | Temperature detection circuit in facsimile machine | |
| JPS6090952U (en) | Incoming level detection circuit |