JPS628627A - Optical communication system for building management system - Google Patents

Optical communication system for building management system

Info

Publication number
JPS628627A
JPS628627A JP60146547A JP14654785A JPS628627A JP S628627 A JPS628627 A JP S628627A JP 60146547 A JP60146547 A JP 60146547A JP 14654785 A JP14654785 A JP 14654785A JP S628627 A JPS628627 A JP S628627A
Authority
JP
Japan
Prior art keywords
optical
data processing
section
data
processing section
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
JP60146547A
Other languages
Japanese (ja)
Inventor
Etsuo Kawai
川井　悦雄
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.)
Hitachi Ltd
Hitachi Elevator Engineering Co
Original Assignee
Hitachi Ltd
Hitachi Elevator Engineering Co
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 Hitachi Ltd, Hitachi Elevator Engineering Co filed Critical Hitachi Ltd
Priority to JP60146547A priority Critical patent/JPS628627A/en
Publication of JPS628627A publication Critical patent/JPS628627A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Communication System (AREA)

Abstract

PURPOSE:To operate a data communication system even when the power of a data processing section is lowered by using separately the power supply for an optical data transmission/reception section and the data processing section of a terminal equipment. CONSTITUTION:The terminal equipment is separated into the optical transmission/reception section and the data processing section and the power supply of the optical transmission/reception section contributed to data communication of the other terminal equipment is provided separately with the power supply of the data processing section. When the power supply 23 of the data processing section 21 is lost, since the optical transmission system functions, data outputted from the data processing section 11 is sent from the optical transmission section 14 to the optical transmission/reception section 24 via an optical fiber 4 and sent to an optical transmission/reception section 34 via an optical fiber 5 at the same time and also to a data processing section 31. Thus, when the power supply of the terminal equipment is lowered, no effect is given to the transmission to the next terminal device.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、通信システムに係り、特に、ビル管理システ
ムに好適な光通信システムに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a communication system, and particularly to an optical communication system suitable for a building management system.

〔発明の背景〕[Background of the invention]

従来のビル管理システムでは、特開昭５６−３１２９７
号公報に記載のように中央処理装置とビル内に設いた。In the conventional building management system,
A central processing unit and a building were installed as described in the publication.

従って、ある端末装置の電源が落ちても、他の電源の入
っている端末装置は、支障なくデータ通信が行なえるよ
うになっている。Therefore, even if the power of one terminal device is turned off, other terminal devices whose power is on can perform data communication without any problem.

光通信を用いた。ビル管理通信システムでは、第３図に
示すように、光ケーブルから、各端末装置が、並列に光
信号を受けることが、光ファイバーの減衰量が大きいた
めにできない、従って、データ通信は、各端末装置で、
光信号を受は電気に変え、これを再び光に変換して次の
端°末へ送出する直列接続とならざるを得ない、この様
なデータ通信では、端末装置と光送受信部の電源を同一
にしておくと、端末をオフラインしたり、電源を落すと
、その端末装置以降の端末装置とデータ通信が、できな
くなる不具合が生じた。Optical communication was used. In the building management communication system, as shown in Figure 3, it is impossible for each terminal device to receive optical signals in parallel from the optical cable due to the large attenuation of the optical fiber. Therefore, data communication is limited to each terminal device. in,
In this type of data communication, where the receiver converts the optical signal into electricity, converts it back into light, and sends it out to the next terminal, a series connection is required. If they were set to be the same, a problem occurred in which when a terminal was taken offline or the power was turned off, data communication with subsequent terminal devices became impossible.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、ビル管理システムの通信システムに光
通信システムを用いたシステムにおいて、複数の端末装
置の内、任意の端末装置の電源を落しても他の端末装置
に影響を与えないシステムを提供することにある。An object of the present invention is to provide a system in which an optical communication system is used as the communication system of a building management system, in which even if the power of any terminal device among a plurality of terminal devices is turned off, other terminal devices are not affected. It is about providing.

〔発明の概要〕[Summary of the invention]

本発明の要点は端末装置を光送受信部とデータ処理部と
に分は他端末装置へのデータ通信に寄与する光送受信部
の電源をデータ処理部の電源とは別のものとし、端末装
置の電源（データ処理部の電源）を落としてもデータ通
信システムが稼動できるようにしたことにある。The key point of the present invention is that a terminal device is divided into an optical transmitting/receiving section and a data processing section. The purpose is to enable the data communication system to operate even if the power (the power to the data processing unit) is turned off.

〔発明の実施例〕[Embodiments of the invention]

以下１本発明の実施例を第１図により説明する。 An embodiment of the present invention will be described below with reference to FIG.

中央処理装置１は、データ処理部１１と光送受信部１４
と電源１２，１３で構成される。The central processing unit 1 includes a data processing section 11 and an optical transceiver section 14.
and power supplies 12 and 13.

端末装置２は、データ処理部２１と光送受信部２４と、
電源２２．２３で構成する。The terminal device 2 includes a data processing section 21, an optical transceiver section 24,
It consists of power supplies 22 and 23.

端末装置３は、データ処理部３１と光送受信部３４と電
源３２．３３で構成する。The terminal device 3 includes a data processing section 31, an optical transmitter/receiver section 34, and power supplies 32 and 33.

中央処理装置と端末装置２．及び端末装置２と端末装置
３は、二本の光ファイバー４，５で通信を行なう。Central processing unit and terminal device2. The terminal device 2 and the terminal device 3 communicate through two optical fibers 4 and 5.

次に、データ通信の信号の流れを説明する。Next, the flow of signals in data communication will be explained.

データ処理部１１より出力したデータは、光送受信部１
４により光信号に変換され、光ファイバー４を介して、
光送受信部２４に転送される。光送受信部２４で、光信
号を電気信号に変換し、データ処理部２１に送信する。The data output from the data processing section 11 is transmitted to the optical transceiver section 1.
4 is converted into an optical signal and transmitted through the optical fiber 4.
The data is transferred to the optical transmitting/receiving section 24. The optical transmitting/receiving section 24 converts the optical signal into an electrical signal and transmits it to the data processing section 21 .

それと同時に、電気信号は、再度、光信号に変換され、
光ファイバー５を介して光送受信部３４で電気信号に変
換し。At the same time, the electrical signal is converted back into an optical signal,
The signal is converted into an electrical signal by the optical transmitter/receiver 34 via the optical fiber 5.

データ処理部３１へ送信する。It is transmitted to the data processing section 31.

このシステムにおいて、データ処理部２１の電源２３を
落とした場合、光伝送システムは、機能しているので、
データ処理部１１より出力したデータは、光送信部１４
より、光ファイバー４を介して、光送受信部２４に送−
信し、同時に、光ファイバー５を介して、光送受信部３
４に送信し、データ処理部３１に送信することができる
。In this system, when the power supply 23 of the data processing unit 21 is turned off, the optical transmission system is still functioning.
The data output from the data processing section 11 is transmitted to the optical transmitting section 14.
The signal is transmitted to the optical transmitter/receiver 24 via the optical fiber 4.
At the same time, the optical transmitter/receiver 3
4 and the data processing unit 31.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、中央処理装置と、複数の端末装置をも
つ、光伝送システムにおいて、端末装置の電源を落とし
た場合に１次の端末装置への伝送に影響を及ぼさない効
果がある。According to the present invention, in an optical transmission system having a central processing unit and a plurality of terminal devices, there is an effect that transmission to the primary terminal device is not affected when the power of the terminal device is turned off.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本発明の一実施例の光通信システムを用いた
ビル管理システムの構成図、第２図は。 金属電線を媒体とする通信システムを用いた。ビル管理
システムの構成図、第３図は、従来の光通信システムを
用いたビル管理システムの構成図である。 １・・・中央処理装置、２，３・・・端末装置、４，５
・・・光ファスバー線、６・・・電線。FIG. 1 is a block diagram of a building management system using an optical communication system according to an embodiment of the present invention, and FIG. 2 is a diagram. A communication system using metal wires as a medium was used. FIG. 3 is a block diagram of a building management system using a conventional optical communication system. 1... Central processing unit, 2, 3... Terminal device, 4, 5
... Optical fiber wire, 6... Electric wire.

Claims (1)

【特許請求の範囲】 １、ビル管理システムにおける中央処理装置とビル内に
設置する端末装置間のデータ通信に光ファイバーケーブ
ルを用いたデータ通信システムにおいて、 前記端末装置の光データ送受信部とデータ処理部の電源
を別にしたことを特徴とするビル管理システムの光通信
システム。 ２、特許請求の範囲第１項において、 前記中央処理装置の前記光データ送受信部と前記データ
処理部の電源をも別にしたことを特徴とするビル管理シ
ステムの光通信システム。[Scope of Claims] 1. In a data communication system using optical fiber cables for data communication between a central processing unit in a building management system and a terminal device installed in a building, an optical data transmitting/receiving section and a data processing section of the terminal device. An optical communication system for a building management system characterized by a separate power source. 2. The optical communication system for a building management system according to claim 1, wherein the optical data transmitting/receiving section and the data processing section of the central processing unit are also powered separately.
JP60146547A 1985-07-05 1985-07-05 Optical communication system for building management system Pending JPS628627A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60146547A JPS628627A (en) 1985-07-05 1985-07-05 Optical communication system for building management system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60146547A JPS628627A (en) 1985-07-05 1985-07-05 Optical communication system for building management system

Publications (1)

Publication Number Publication Date
JPS628627A true JPS628627A (en) 1987-01-16

Family

ID=15410124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60146547A Pending JPS628627A (en) 1985-07-05 1985-07-05 Optical communication system for building management system

Country Status (1)

Country Link
JP (1) JPS628627A (en)

Similar Documents

Publication Publication Date Title
MXPA03005313A (en) Interfacing fiber optic data with electrical power systems.
US9306755B2 (en) Data transmission device
BG100993A (en) Hybrid electrical and telecommunication distribution network
ES2161527T3 (en) METHOD AND PROVISION FOR CONNECTION OF A COMPUTER TO A NETWORK OF COMPUTERS, THROUGH A TELEPHONE CENTRAL.
TW362205B (en) An arrangement for the transmission of signals via a field bus
US20140126912A1 (en) Systems and methods for interconnection discovery in optical communication systems
JPS628627A (en) Optical communication system for building management system
US5068847A (en) Fiber optic network architecture having data feedback for monitoring communications thereon
JPS58202633A (en) Optical space propagation network system
JP2766242B2 (en) Bus system for printing press
JPS6187439A (en) On-vehicle data transmission network
JPS5736305A (en) Multivalue control system
JPH03104434A (en) Method for optical reception level adjustment
JPS6276332A (en) Optical connector
JPS58172039A (en) Optical transmission system
JPS6253032A (en) Optical fiber two-way transmission system
JPS58101536A (en) Annular optical communication device
JPS63203027A (en) Optical relay transmission system
JPS6292531A (en) Space propagation light communication equipment
JPH01181343A (en) Wavelength split multiplex optical transmitter
JPS60230744A (en) Data transmission equipment in loop type communicating system
JPS6178246A (en) Data transmission system
JPH0388529A (en) Network device for duplex optical communication
JPH0243851A (en) Direct coupler
JPH01238330A (en) Optical transmission equipment