JPS5539476A - Selection circuit - Google Patents

Selection circuit

Info

Publication number
JPS5539476A
JPS5539476A JP11341878A JP11341878A JPS5539476A JP S5539476 A JPS5539476 A JP S5539476A JP 11341878 A JP11341878 A JP 11341878A JP 11341878 A JP11341878 A JP 11341878A JP S5539476 A JPS5539476 A JP S5539476A
Authority
JP
Japan
Prior art keywords
selection
power source
change
bus
over switch
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
JP11341878A
Other languages
Japanese (ja)
Inventor
Koichi Kyo
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 JP11341878A priority Critical patent/JPS5539476A/en
Publication of JPS5539476A publication Critical patent/JPS5539476A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To secure an assured actuation of the selection circuit by adding the backup selection input circuit to the power source which is formed independently from the selection input power source to drive the change-over switch. CONSTITUTION:Group selection bus 50 and individual selection bus 80 are provided between positive power source 10 and negative power source 20, and the switch and selection control is carried out by group selection bus change-over switch 104 and individual selection bus change-over switch 105. Then backup selection input circuits 101 and 102 are added to the power source formed independently from selection input power sources 10 and 20 which drive change-over switches 104 and 105, and thus OV is secured for the voltage applied to buses 50 and 80 at the nonselection time. As a result, the incapability of the selection control due to the loss of the power source and other factors can be solved, thus securing an assured operation for the selection circuit.
JP11341878A 1978-09-14 1978-09-14 Selection circuit Pending JPS5539476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11341878A JPS5539476A (en) 1978-09-14 1978-09-14 Selection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11341878A JPS5539476A (en) 1978-09-14 1978-09-14 Selection circuit

Publications (1)

Publication Number Publication Date
JPS5539476A true JPS5539476A (en) 1980-03-19

Family

ID=14611744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11341878A Pending JPS5539476A (en) 1978-09-14 1978-09-14 Selection circuit

Country Status (1)

Country Link
JP (1) JPS5539476A (en)

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