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JPS53139498A - Display-line supervisory device - Google Patents

Display-line supervisory device

Info

Publication number
JPS53139498A
JPS53139498A JP5474977A JP5474977A JPS53139498A JP S53139498 A JPS53139498 A JP S53139498A JP 5474977 A JP5474977 A JP 5474977A JP 5474977 A JP5474977 A JP 5474977A JP S53139498 A JPS53139498 A JP S53139498A
Authority
JP
Japan
Prior art keywords
display
supervisory device
line supervisory
display line
relay
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
JP5474977A
Other languages
Japanese (ja)
Other versions
JPS583277B2 (en
Inventor
Mitsuo Iizuka
Toshinobu Ebizaka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5474977A priority Critical patent/JPS583277B2/en
Publication of JPS53139498A publication Critical patent/JPS53139498A/en
Publication of JPS583277B2 publication Critical patent/JPS583277B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Alarm Systems (AREA)

Abstract

PURPOSE: To exercise an accurate supervision identifying the actual trouble of a display line from the abnormality of a supervisory circuit, by providing a DC undervoltage relay to the DC output side of a power supply device and by detecting the short, disconnection and grounding of the display line under the condition that the relay will not operate.
COPYRIGHT: (C)1978,JPO&Japio
JP5474977A 1977-05-11 1977-05-11 Display line monitoring device Expired JPS583277B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5474977A JPS583277B2 (en) 1977-05-11 1977-05-11 Display line monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5474977A JPS583277B2 (en) 1977-05-11 1977-05-11 Display line monitoring device

Publications (2)

Publication Number Publication Date
JPS53139498A true JPS53139498A (en) 1978-12-05
JPS583277B2 JPS583277B2 (en) 1983-01-20

Family

ID=12979408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5474977A Expired JPS583277B2 (en) 1977-05-11 1977-05-11 Display line monitoring device

Country Status (1)

Country Link
JP (1) JPS583277B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0611092U (en) * 1992-07-13 1994-02-10 東急建設株式会社 Alarm device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0611092U (en) * 1992-07-13 1994-02-10 東急建設株式会社 Alarm device

Also Published As

Publication number Publication date
JPS583277B2 (en) 1983-01-20

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