JPS5685951A - Data transmission device - Google Patents

Data transmission device

Info

Publication number
JPS5685951A
JPS5685951A JP16166779A JP16166779A JPS5685951A JP S5685951 A JPS5685951 A JP S5685951A JP 16166779 A JP16166779 A JP 16166779A JP 16166779 A JP16166779 A JP 16166779A JP S5685951 A JPS5685951 A JP S5685951A
Authority
JP
Japan
Prior art keywords
terminal equipment
data
gathering station
data gathering
photocoupler
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
JP16166779A
Other languages
Japanese (ja)
Inventor
Toshiaki Mizuta
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 JP16166779A priority Critical patent/JPS5685951A/en
Publication of JPS5685951A publication Critical patent/JPS5685951A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To protect the terminal equipment from a noize such as lightning surge, etc. and prevent a measuring error, by connecting the data gathering station in the data transmission device for executing a remote inspection of the working amount, and the terminal equipment, by the means which has electrically insulated the terminal equipment side.
CONSTITUTION: In case when a data which is electrically stored in the terminal equipment 20 is transmitted to the data gathering station 10 through the transmission lines l1, l2, the transmission lines l1, l2 and the terminal equipment 20 through the photocouplers PC1, PC2. When the transistor Tr is controlled to on and off by a clock pulse in the data gathering station 10, the photocoupler PC1 of the terminal equipment 20 operates, the same clock pulse is generated in its output terminal C, and a data from the information processing device 22 is read out. And, when the photocoupler PC2 is made active and nonactive, the potential level variation of the point B in the data gathering station 10 is detected, and the data is read.
COPYRIGHT: (C)1981,JPO&Japio
JP16166779A 1979-12-14 1979-12-14 Data transmission device Pending JPS5685951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16166779A JPS5685951A (en) 1979-12-14 1979-12-14 Data transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16166779A JPS5685951A (en) 1979-12-14 1979-12-14 Data transmission device

Publications (1)

Publication Number Publication Date
JPS5685951A true JPS5685951A (en) 1981-07-13

Family

ID=15739539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16166779A Pending JPS5685951A (en) 1979-12-14 1979-12-14 Data transmission device

Country Status (1)

Country Link
JP (1) JPS5685951A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5092621A (en) * 1973-12-14 1975-07-24
JPS52109804A (en) * 1976-01-09 1977-09-14 Post Office Data transmission system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5092621A (en) * 1973-12-14 1975-07-24
JPS52109804A (en) * 1976-01-09 1977-09-14 Post Office Data transmission system

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