JPS55129709A - Data read-in unit - Google Patents
Data read-in unitInfo
- 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
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
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) |
-
1979
- 1979-03-30 JP JP3702579A patent/JPS55129709A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IE780972L (en) | Electronic device for producing an output signal related to¹electrical power | |
US4352104A (en) | Remote meter reading apparatus | |
JPS55129709A (en) | Data read-in unit | |
JPS57104325A (en) | Ecl circuit | |
US3614318A (en) | Data transmission system | |
JPS5337344A (en) | Data collecting system | |
US3066287A (en) | Electroluminescent device | |
US4151371A (en) | Remote meter reading apparatus comprising interphone means | |
GB1513624A (en) | Key sensing circuit in a digital calculator | |
JPS5616225A (en) | Input selection circuit for microcomputer | |
JPS5326945A (en) | Time division processing digital protective relay | |
JPS6450795A (en) | Electronic equipment | |
JPS5451456A (en) | Switching circuit of double balancing type | |
JPS5383599A (en) | Display circuit | |
JPS533767A (en) | Input-output-insulation circuit using photocoupler | |
JPS5585938A (en) | Input unit for digital information | |
SU920536A1 (en) | Multi-threshold voltage indicator | |
JPS5710531A (en) | Level conversion circuit | |
JPS56168243A (en) | Constant-voltage circuit | |
SU818014A1 (en) | Pulse distributor | |
JPS5672738A (en) | Parallel-series converting circuit | |
KR840000940A (en) | Digital transition register | |
GB977080A (en) | Improvements relating to two state electronic switching arrangements | |
JPS5492034A (en) | Integrated circuit | |
JPS5290049A (en) | Earth detection circuit |