JPS55129709A - Data read-in unit - Google Patents

Data read-in unit

Info

Publication number
JPS55129709A
JPS55129709A JP3702579A JP3702579A JPS55129709A JP S55129709 A JPS55129709 A JP S55129709A JP 3702579 A JP3702579 A JP 3702579A JP 3702579 A JP3702579 A JP 3702579A JP S55129709 A JPS55129709 A JP S55129709A
Authority
JP
Japan
Prior art keywords
circuit
meter
read
switch
series connection
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
JP3702579A
Other languages
Japanese (ja)
Inventor
Kazuhito Saito
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP3702579A priority Critical patent/JPS55129709A/en
Publication of JPS55129709A publication Critical patent/JPS55129709A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To establish the read-in unit suitable for remote metering, by conducting the switching circuit having the threshold voltage corresponding to each bit output of the counter when a plurality of constant voltage sources corresponding to this voltage are scanned.
CONSTITUTION: The data collection station side 10 and the terminal unit side 20 are connected with three transmission lines. The terminal unit 20 has the switching circuit in series connection of diodes equal to the number of output bits of the counter meter 21, and the collective station 10 has the diode circuit in series connection with the constant current circuit 11. The potential at the junction points 0W9 is equal to the threshold potential of the junction points 0'W9' corresponding to it. When the indication of the meter 21 is 7432, and when the switch S1 is turned on and off and the switch S10 is sequentially scanned toward the arrow, a current flows to the ammeter 12 when it reaches the threshold voltage of the circuit 12, enabling to read the indication value 7 of 103 digit of the meter. Similar operation can be made to other digits.
COPYRIGHT: (C)1980,JPO&Japio
JP3702579A 1979-03-30 1979-03-30 Data read-in unit Pending JPS55129709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3702579A JPS55129709A (en) 1979-03-30 1979-03-30 Data read-in unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3702579A JPS55129709A (en) 1979-03-30 1979-03-30 Data read-in unit

Publications (1)

Publication Number Publication Date
JPS55129709A true JPS55129709A (en) 1980-10-07

Family

ID=12486100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3702579A Pending JPS55129709A (en) 1979-03-30 1979-03-30 Data read-in unit

Country Status (1)

Country Link
JP (1) JPS55129709A (en)

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