JPS5792951A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS5792951A
JPS5792951A JP16982180A JP16982180A JPS5792951A JP S5792951 A JPS5792951 A JP S5792951A JP 16982180 A JP16982180 A JP 16982180A JP 16982180 A JP16982180 A JP 16982180A JP S5792951 A JPS5792951 A JP S5792951A
Authority
JP
Japan
Prior art keywords
photocoupler
slave station
station
turned
master station
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
JP16982180A
Other languages
Japanese (ja)
Inventor
Masaichi Omori
Kozo Suzuki
Yasuhiro Shimizu
Susumu Watanabe
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.)
Panasonic Holdings Corp
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Matsushita Electric Industrial 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 Tokyo Electric Power Co Inc, Matsushita Electric Industrial Co Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP16982180A priority Critical patent/JPS5792951A/en
Publication of JPS5792951A publication Critical patent/JPS5792951A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Abstract

PURPOSE:To transmit data from slave stations placed in the master station side of the faulty point even if the fault occurs in a certain slave station, by connecting a light emitting diode for receiving and a transistor for returning, which are connected to a constant voltage or constant current circuit, in directions opposite to each other to constitute a transmitting and receiving circuit of the slave station. CONSTITUTION:In case of data transmission from a master station 1 to a slave station 2 or 3, a transistor 12 is turned on and off through a photocoupler 11 to transmit data to a photocoupler 21 connected to a constant voltage circuit (or a constant current circuit) 22 in the slave station 2 or 3. Meanwhile, in case of data return from the slave station 2 or 3 to the master station 1, a photocoupler 111 in the master station 1 is turned on, and a photocoupler 15 is turned on. Under this state, a photocoupler 27 in the slave station 2 or 3 is turned on and off in accordance with return data to transfer this return data to a photocoupler 16 in the master station 1. Consequently, even if a fault occurs in the slave station 3, data transmission between the slave station 2 and the master station 1 is not troubled by the action of the constant voltage circuit 22.
JP16982180A 1980-12-02 1980-12-02 Signal transmission system Pending JPS5792951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16982180A JPS5792951A (en) 1980-12-02 1980-12-02 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16982180A JPS5792951A (en) 1980-12-02 1980-12-02 Signal transmission system

Publications (1)

Publication Number Publication Date
JPS5792951A true JPS5792951A (en) 1982-06-09

Family

ID=15893516

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16982180A Pending JPS5792951A (en) 1980-12-02 1980-12-02 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS5792951A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110252A (en) * 1982-12-15 1984-06-26 Sumitomo Electric Ind Ltd Receiving circuit
JPH0447161U (en) * 1990-08-29 1992-04-22

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122804A (en) * 1974-03-15 1975-09-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122804A (en) * 1974-03-15 1975-09-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110252A (en) * 1982-12-15 1984-06-26 Sumitomo Electric Ind Ltd Receiving circuit
JPH0447161U (en) * 1990-08-29 1992-04-22

Similar Documents

Publication Publication Date Title
KR900006789B1 (en) Loop transmission system having automatic loop configuration control means
FR2342600A1 (en) INFORMATION TRANSFER SYSTEM
DE3772404D1 (en) CIRCUIT ARRANGEMENT FOR SERIAL DATA TRANSFER BETWEEN SEVERAL PARTICIPANTS.
JPS5792951A (en) Signal transmission system
US4046959A (en) Data communication system using photocouplers
JPS56104561A (en) Data transmission system
JPS6472695A (en) Remote supervisory and controlling system
AU5114685A (en) Data network interface module
JPS56104558A (en) Switching system of multitransmission line
JPS5742248A (en) Switching device for communication system
JPS56125141A (en) Pulse signal transmission system
DE3069003D1 (en) Communication equipment
JPS56138346A (en) Control system for multipoint line
JPS57183154A (en) Multispeed transmission system
JPS57107648A (en) Signal transmission and reception system
JPS57150236A (en) Channel shared type receiving device
JPS5555642A (en) Duplex system in data transmission slave station
JPS55154849A (en) Signal transmitter
JPS5634257A (en) Data transmission system with automatic
JPS5613856A (en) Signal transmitting system
SU813488A1 (en) Signal transmitting and receiving device
JPS54148408A (en) Transmission line return control system
JPS5733851A (en) Switching system of station
JPS56149831A (en) Duplex line switching unit
JPS5355910A (en) Pcm transmission system