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JPS57147738A - Input circuit - Google Patents

Input circuit

Info

Publication number
JPS57147738A
JPS57147738A JP56033120A JP3312081A JPS57147738A JP S57147738 A JPS57147738 A JP S57147738A JP 56033120 A JP56033120 A JP 56033120A JP 3312081 A JP3312081 A JP 3312081A JP S57147738 A JPS57147738 A JP S57147738A
Authority
JP
Japan
Prior art keywords
voltage
lmd
denoted
turned
operate
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
Application number
JP56033120A
Other languages
Japanese (ja)
Inventor
Takashi Nakajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56033120A priority Critical patent/JPS57147738A/en
Publication of JPS57147738A publication Critical patent/JPS57147738A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent malfunction by installing a blind sector, which operates when a switching element is turned off and does not operate when the element is turned on, on a photocoupler corresponding to the ON/OFF operation of the switching element installed in a distant place. CONSTITUTION:A contact S of each kind of electronic device A is installed far from photocoupker PC, for example, at several 10m or 100m intervals, and positive and negative DC voltage from terminals P and N are impressed. When the resistance between LMD Dp and pole N is denoted as resistance R1, voltage VD on the cathode side of LMD Dp and the contact S is denoted as VD and the voltage between P and B is denoted as E, VD=E.R1/(R1+R2) can be obtained. In case of R1=R2, VD=1/2E can be obtained. In this case even if <=1/2E abnormal voltage is inputted to the anode side of the LME D<p>, current does not flow in the LMD D<p>. Voltage VD is operated as blind sector voltage and even if external interrupting voltage caused by noises is added, photocoupler PC can not operate malfunction.
JP56033120A 1981-03-10 1981-03-10 Input circuit Pending JPS57147738A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56033120A JPS57147738A (en) 1981-03-10 1981-03-10 Input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56033120A JPS57147738A (en) 1981-03-10 1981-03-10 Input circuit

Publications (1)

Publication Number Publication Date
JPS57147738A true JPS57147738A (en) 1982-09-11

Family

ID=12377766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56033120A Pending JPS57147738A (en) 1981-03-10 1981-03-10 Input circuit

Country Status (1)

Country Link
JP (1) JPS57147738A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421234A (en) * 1977-07-19 1979-02-17 Mitsubishi Electric Corp Input circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421234A (en) * 1977-07-19 1979-02-17 Mitsubishi Electric Corp Input circuit

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