JPS554621A - Digital input circuit - Google Patents
Digital input circuitInfo
- Publication number
- JPS554621A JPS554621A JP7700178A JP7700178A JPS554621A JP S554621 A JPS554621 A JP S554621A JP 7700178 A JP7700178 A JP 7700178A JP 7700178 A JP7700178 A JP 7700178A JP S554621 A JPS554621 A JP S554621A
- Authority
- JP
- Japan
- Prior art keywords
- digital input
- diode
- series
- input circuit
- resistance
- 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
- Electronic Switches (AREA)
Abstract
PURPOSE: To obtain an economical digital input circuit by making connections so that a power voltage will be applied in parallel to a diode by providing a resistance connected in series.
CONSTITUTION: In order to flow an input current to photo coupler 5, the main circuit is provided which has diode 14, power supply 2, contact 1, and current limiting resistance 4 connected sequentially in series from one input terminal to the other. Then, auxiliary power supply circuit 12 with series-connected resistance 13 is so connected that power voltage 2 will be applied to diode 14 in parallel. Consequently, an economical digital input circuit with small power consumption can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7700178A JPS554621A (en) | 1978-06-27 | 1978-06-27 | Digital input circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7700178A JPS554621A (en) | 1978-06-27 | 1978-06-27 | Digital input circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS554621A true JPS554621A (en) | 1980-01-14 |
Family
ID=13621523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7700178A Pending JPS554621A (en) | 1978-06-27 | 1978-06-27 | Digital input circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS554621A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6177396A (en) * | 1984-09-25 | 1986-04-19 | 株式会社東芝 | Electronic-part taping |
-
1978
- 1978-06-27 JP JP7700178A patent/JPS554621A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6177396A (en) * | 1984-09-25 | 1986-04-19 | 株式会社東芝 | Electronic-part taping |
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