JPS5920303U

JPS5920303U - signal converter

Info

Publication number: JPS5920303U
Application number: JP7492583U
Authority: JP
Inventors: 高堀　洋一; 千葉　博己
Original assignee: 株式会社日立製作所
Priority date: 1983-05-18
Filing date: 1983-05-18
Publication date: 1984-02-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来のプロセス制御系のブロック図、第２図は
本考案の信号変換装置をプロセス制御系に用いた一実施
例を示すブロック図、第３図は本考案の信号変換装置の
一実施例の基本構成を示すブロック図、第４図、第５図
は本考案の信号変換装置の具体的実施例を示す構成図、
第６図は来者　　　　。案の信号変換装置の他の実施例を示す構成図であ　　　
、る。１・・・検出器、５・・・操作器、６・・・プロセス入
力信号、７・・・プロセス出力信号、８・・・直流電源
、９・・・、共通電源母線、１０・・・信号変換装置、
１１・・・調節計、１２・・・直流電圧、１３・・・測
定電圧、１４・・・演算電圧、１５・・・電源スィッチ
、１６・・・ヒユーズ、１７・・・電源供給部、１８・
・・入力信号変換部、１９・・・出力信号変換部、２０
・・・手動バックアップ回路、２２・・・警報ヒユーズ
、２３．２４・・・表示ランプ、２５・・・外部指令接
点、Ｎ・・・ＤＣ−ＡＣコンバータ、Ｔ・・・トランス
、Ｗ・・・整流平滑回路、Ｐ・・・警報接点。ｒ−ｔｂｊｒ、ｑ第　５　図１　　　　１　俣〜ｔｓ　　　　　　１１ｉｆｔ”−ｉ
ｌ築　４　聞一一一・へ−（ｆ”　”　−□ ｉｌｇ”−−＝ｌFig. 1 is a block diagram of a conventional process control system, Fig. 2 is a block diagram showing an embodiment of the signal conversion device of the present invention used in a process control system, and Fig. 3 is a block diagram of an example of the signal conversion device of the present invention. FIGS. 4 and 5 are block diagrams showing the basic configuration of the embodiment; FIGS. 4 and 5 are block diagrams showing a specific embodiment of the signal conversion device of the present invention;
Figure 6 is the visitor. FIG. 2 is a configuration diagram showing another embodiment of the proposed signal conversion device;
,ru. DESCRIPTION OF SYMBOLS 1...Detector, 5...Manufacturer, 6...Process input signal, 7...Process output signal, 8...DC power supply, 9...Common power supply bus, 10... signal converter,
DESCRIPTION OF SYMBOLS 11... Controller, 12... DC voltage, 13... Measured voltage, 14... Calculated voltage, 15... Power switch, 16... Fuse, 17... Power supply unit, 18・
...Input signal conversion section, 19...Output signal conversion section, 20
...Manual backup circuit, 22...Alarm fuse, 23.24...Indication lamp, 25...External command contact, N...DC-AC converter, T...Transformer, W... Rectifier smoothing circuit, P...alarm contact. r-tbjr, q 5th Figure 1 1 Mata~ts 11ift”-i
l Tsuki 4 Kunichiichi・he−(f” ” −□ ilg”−−=l

Claims

[Scope of utility model registration request]

In systems where multiple process control systems consisting of multiple instruments are connected to a common DC power source, the control system is configured by receiving the process input signal provided for each process control system and converting it into a unified electrical signal. a signal converting unit comprising at least one of an input signal converting unit that receives a calculation signal equal to the unified electrical signal from the meter and converts it into a process output signal; and a power supply unit that receives power from the DC power supply and supplies the plurality of instruments and signal conversion unit that constitute a control system with a power that is DC-insulated from the DC power supply.