JPS577569A - Detecting system for disconnection in digital output circuit - Google Patents

Detecting system for disconnection in digital output circuit

Info

Publication number
JPS577569A
JPS577569A JP8094280A JP8094280A JPS577569A JP S577569 A JPS577569 A JP S577569A JP 8094280 A JP8094280 A JP 8094280A JP 8094280 A JP8094280 A JP 8094280A JP S577569 A JPS577569 A JP S577569A
Authority
JP
Japan
Prior art keywords
disconnection
power output
elements
circuit
output circuit
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.)
Granted
Application number
JP8094280A
Other languages
Japanese (ja)
Other versions
JPS6321870B2 (en
Inventor
Yoshihiro Chiba
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.)
Fuji Facom Corp
Original Assignee
Fuji Facom Corp
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 Fuji Facom Corp filed Critical Fuji Facom Corp
Priority to JP8094280A priority Critical patent/JPS577569A/en
Publication of JPS577569A publication Critical patent/JPS577569A/en
Publication of JPS6321870B2 publication Critical patent/JPS6321870B2/ja
Granted 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

Abstract

PURPOSE:To reliably detect a disconnection of power output elements with a simple circuit, by connecting a resistor to each of power output parts in parallel to provide a detecting circuit to detect the change in resistance resulting from the disconnection of power output elements. CONSTITUTION:When one of drivers DR0-DR3 is on (off), and the one of relays RY0-RY3 which corresponds thereto has been disconnected, the potential at one of points P0-P3 is extremely lower than before the disconnection of the relay, and the output of one of inverters INV0-INV3 becomes H. Consequently, an AND circuit is opened to report abnormality. In this case, because the potentials at the points P0- P3 are independent of the on and off of the drivers DR0-DR3, the disconnection accident of the relays can be detected independently of the on and off of the drives. By such a constitution, the disconnection of power output elements can be reliably detected with a simple circuit by using inexpensive parts or elements.
JP8094280A 1980-06-17 1980-06-17 Detecting system for disconnection in digital output circuit Granted JPS577569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8094280A JPS577569A (en) 1980-06-17 1980-06-17 Detecting system for disconnection in digital output circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8094280A JPS577569A (en) 1980-06-17 1980-06-17 Detecting system for disconnection in digital output circuit

Publications (2)

Publication Number Publication Date
JPS577569A true JPS577569A (en) 1982-01-14
JPS6321870B2 JPS6321870B2 (en) 1988-05-09

Family

ID=13732534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8094280A Granted JPS577569A (en) 1980-06-17 1980-06-17 Detecting system for disconnection in digital output circuit

Country Status (1)

Country Link
JP (1) JPS577569A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6937035B2 (en) 2001-07-19 2005-08-30 Omron Corporation Method and apparatus for inspecting printed circuit boards
JP2005261127A (en) * 2004-03-12 2005-09-22 Aisin Aw Co Ltd Electric vehicle abnormality determining apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6937035B2 (en) 2001-07-19 2005-08-30 Omron Corporation Method and apparatus for inspecting printed circuit boards
US7250785B2 (en) 2001-07-19 2007-07-31 Omron Corporation Method and apparatus for inspecting printed circuit boards
JP2005261127A (en) * 2004-03-12 2005-09-22 Aisin Aw Co Ltd Electric vehicle abnormality determining apparatus
JP4492160B2 (en) * 2004-03-12 2010-06-30 アイシン・エィ・ダブリュ株式会社 Electric vehicle abnormality determination device

Also Published As

Publication number Publication date
JPS6321870B2 (en) 1988-05-09

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