JPS57125360A - Device for detecting connection in electronic unit - Google Patents

Device for detecting connection in electronic unit

Info

Publication number
JPS57125360A
JPS57125360A JP56010188A JP1018881A JPS57125360A JP S57125360 A JPS57125360 A JP S57125360A JP 56010188 A JP56010188 A JP 56010188A JP 1018881 A JP1018881 A JP 1018881A JP S57125360 A JPS57125360 A JP S57125360A
Authority
JP
Japan
Prior art keywords
signal line
potential
main unit
unit
control section
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
JP56010188A
Other languages
Japanese (ja)
Inventor
Yasufumi Tanimoto
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 JP56010188A priority Critical patent/JPS57125360A/en
Publication of JPS57125360A publication Critical patent/JPS57125360A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

PURPOSE:To enable for a main unit to detect the connection between the main unit and attached unit only by connecting therebetween by a device wherein the main unit having a control section is equipped with a signal line for detecting the connection and the attached unit controlled by the control section is equipped with a signal line for effecting the detection. CONSTITUTION:A main unit 1 is equipped with signal lines 3-6 and a power line 7 which are connected to a control section 2, while an attached unit 11 is equipped with signal lines 13-17. The signal line 3 serves as a signal line for detecting the connection, to which positive biasing potential preset by a biasing power supply B is applied, and the signal line 13 serves as a signal line for effecting the detection and to cause potential of the signal line 3 to be dropped to the earth potential when connected to the signal line 3. Upon just connecting the main unit 1 and the attached unit 11, the signal line 3 is connected to the signal line 13 so that the potential of the signal line 3 drops from the positive biasing potential to the earth potential. Based on such a change in the potential of the signal line 3, the control section 2 detects the fact that the attached unit 11 is connected to the main unit 1.
JP56010188A 1981-01-28 1981-01-28 Device for detecting connection in electronic unit Pending JPS57125360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56010188A JPS57125360A (en) 1981-01-28 1981-01-28 Device for detecting connection in electronic unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56010188A JPS57125360A (en) 1981-01-28 1981-01-28 Device for detecting connection in electronic unit

Publications (1)

Publication Number Publication Date
JPS57125360A true JPS57125360A (en) 1982-08-04

Family

ID=11743301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56010188A Pending JPS57125360A (en) 1981-01-28 1981-01-28 Device for detecting connection in electronic unit

Country Status (1)

Country Link
JP (1) JPS57125360A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01162435A (en) * 1987-12-18 1989-06-26 Fujitsu Ltd Interfering radio wave preventing circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01162435A (en) * 1987-12-18 1989-06-26 Fujitsu Ltd Interfering radio wave preventing circuit
JPH0793605B2 (en) * 1987-12-18 1995-10-09 富士通株式会社 Interference prevention circuit

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