JPH07212971A - Protection of power circuit from external noise - Google Patents
Protection of power circuit from external noiseInfo
- Publication number
- JPH07212971A JPH07212971A JP6023141A JP2314194A JPH07212971A JP H07212971 A JPH07212971 A JP H07212971A JP 6023141 A JP6023141 A JP 6023141A JP 2314194 A JP2314194 A JP 2314194A JP H07212971 A JPH07212971 A JP H07212971A
- Authority
- JP
- Japan
- Prior art keywords
- printed board
- external noise
- circuit
- noise protection
- power circuit
- 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
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Combinations Of Printed Boards (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電源回路、特に既設
の電源回路に外来ノイズ保護回路を簡単に追加するため
の方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit, and more particularly to a method for easily adding an external noise protection circuit to an existing power supply circuit.
【０００２】[0002]
【従来の技術】既設の電源回路に外来ノイズ、例えば雷
サージの保護回路を追加して装備しようとする場合、従
来は電源回路を取り外し、プリント板の改造と部品の追
加を行っている。2. Description of the Related Art When an existing power supply circuit is to be additionally equipped with a protection circuit against external noise, for example, lightning surge, the power supply circuit is conventionally removed and the printed board is modified and parts are added.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このような方
法では改造に多くの手間と時間を必要とし、設備の休止
時間が長引くという問題がある。そこで、この発明は、
既設の電源回路にも簡単に外来ノイズ保護回路を追加で
きる方法を提供することを目的とするものである。However, such a method has a problem that a lot of labor and time are required for remodeling and the downtime of the equipment is prolonged. So, this invention
It is an object of the present invention to provide a method for easily adding an external noise protection circuit to an existing power supply circuit.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、この発明は、電源回路を搭載したプリント板と負荷
との間に、前記電源回路のための外来ノイズ保護回路を
搭載したプリント板を介挿して接続するものとする。In order to achieve the above object, the present invention provides a printed board having an external noise protection circuit for the power supply circuit between the printed board having the power supply circuit and a load. Shall be inserted and connected.
【０００５】[0005]
【作用】この発明は、外来ノイズ保護用のプリント板を
別途製作し、これを電源回路プリント板と負荷との間に
介挿して接続する。このような方法によれば、電源回路
と負荷との間のリード線を取り外して外来ノイズ保護プ
リント板を電源回路プリント板に接続し、次いで外来ノ
イズ保護プリント板に負荷側のリード線を接続するだけ
でよいので、電源回路プリント板を改造することなく現
場作業だけで短時間に外来ノイズ保護回路を追加するこ
とができる。According to the present invention, a printed board for protecting external noise is separately manufactured, and this printed board is inserted and connected between the power circuit printed board and the load. According to such a method, the lead wire between the power supply circuit and the load is removed, the external noise protection printed board is connected to the power supply circuit printed board, and then the load side lead wire is connected to the external noise protection printed board. Since it is sufficient, the external noise protection circuit can be added in a short time only by on-site work without modifying the power supply circuit printed board.
【０００６】[0006]
【実施例】図１及び図２は負荷に商用電源（２００Ｖ）
から直流定電圧（２４Ｖ）を供給する既設の電源回路
に、外来ノイズ保護回路を追加して装備する場合の実施
例を示すもので、図１はプリント板の接続図、図２はそ
れらの回路図である。図１において、電源回路プリント
板１の出力端子１ａには、負荷としての圧力センサ２が
Ｙ形端子３ａを持つリード線３を介して接続されてい
た。しかし、電源回路には外来ノイズ保護回路が設けら
れておらず、雷サージと考えられる外来ノイズにより出
力電圧が低下する。そのため、サージ吸収回路のみを搭
載した外来ノイズ保護プリント板４を別途製作し、これ
を電源回路プリント板１と負荷２との間に介挿して接続
するものである。[Embodiment] FIGS. 1 and 2 show a commercial power source (200 V) as a load.
FIG. 1 shows an embodiment in which an external noise protection circuit is additionally provided to an existing power supply circuit for supplying a DC constant voltage (24 V) from the circuit, FIG. 1 is a connection diagram of a printed board, and FIG. 2 is those circuits. It is a figure. In FIG. 1, a pressure sensor 2 as a load is connected to an output terminal 1a of a power circuit printed board 1 through a lead wire 3 having a Y-shaped terminal 3a. However, no external noise protection circuit is provided in the power supply circuit, and the output voltage drops due to external noise that is considered to be a lightning surge. Therefore, the external noise protection printed board 4 having only the surge absorbing circuit is manufactured separately, and is inserted and connected between the power circuit printed board 1 and the load 2.
【０００７】外来ノイズ保護プリント板４は入力側に、
リード線３のＹ形端子３ａと同一構成のＹ形端子４ａを
備え、また出力側には電源回路プリント板１の出力端子
１ａと同一構成の出力端子４ｂを備えている。そこで、
リード線３を出力端子１ａから取り外して、これに矢印
で示すように外来ノイズ保護プリント板４の入力側を接
続し、その出力側にリード線３を改めて接続する。これ
により、負荷２には電源用プリント板１から外来ノイズ
保護プリント板４を介して、常に安定した直流電圧が供
給される。The external noise protection printed board 4 is provided on the input side.
A Y-shaped terminal 4a having the same configuration as the Y-shaped terminal 3a of the lead wire 3 is provided, and an output terminal 4b having the same configuration as the output terminal 1a of the power circuit printed board 1 is provided on the output side. Therefore,
The lead wire 3 is removed from the output terminal 1a, the input side of the external noise protection printed board 4 is connected to this as shown by the arrow, and the lead wire 3 is connected to the output side again. As a result, a stable DC voltage is always supplied to the load 2 from the power supply printed board 1 through the external noise protection printed board 4.
【０００８】ここで、図２の回路について簡単に説明す
ると、まず電源回路プリント板１はは図示しない整流回
路及び平滑回路と図示定電圧回路とからなり、定電圧回
路は３端子レギュレータ５及びその入出力側に接続され
た電解コンデンサ６から構成されている。一方、外来ノ
イズ保護プリント板４は、電圧回路からの出力を整流用
ダイオード７を介してツェナーダイオード８に加えて電
圧を固定し、更に細かいノイズをサージ吸収用フィルム
コンデンサ９で取り除く構成となっている。The circuit of FIG. 2 will be briefly described. First, the power supply circuit printed board 1 is composed of a rectifying circuit and a smoothing circuit (not shown) and a constant voltage circuit shown in the figure. It is composed of an electrolytic capacitor 6 connected to the input / output side. On the other hand, the external noise protection printed board 4 has a structure in which the output from the voltage circuit is applied to the Zener diode 8 via the rectifying diode 7 to fix the voltage, and further fine noise is removed by the surge absorbing film capacitor 9. There is.
【０００９】[0009]
【発明の効果】この発明は、電源回路用の外来ノイズ保
護プリント板を別途製作し、これを電源回路プリント板
と負荷との間に介挿して接続するようにしたので、既設
の電源回路を改造することなく、簡単に外来ノイズ保護
回路を増設することができる。According to the present invention, the external noise protection printed board for the power supply circuit is separately manufactured, and is inserted and connected between the power supply circuit printed board and the load. An external noise protection circuit can be easily added without modification.
【図１】この発明の実施例を示すプリント板の接続図で
ある。FIG. 1 is a connection diagram of a printed board showing an embodiment of the present invention.
【図２】図１のプリント板の回路図である。FIG. 2 is a circuit diagram of the printed board of FIG.
１ 電源回路プリント板 ２ 負荷 ４ 外来ノイズ保護プリント板 1 Power circuit printed board 2 Load 4 External noise protection printed board
Claims (1)
間に、前記電源回路の外来ノイズ保護回路を搭載したプ
リント板を介挿して接続することを特徴とする電源回路
の外来ノイズ保護方法。1. A method for protecting external noise of a power supply circuit, characterized in that a printed board having an external noise protection circuit for the power supply circuit is inserted and connected between a printed circuit board having the power supply circuit and a load. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6023141A JPH07212971A (en) | 1994-01-25 | 1994-01-25 | Protection of power circuit from external noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6023141A JPH07212971A (en) | 1994-01-25 | 1994-01-25 | Protection of power circuit from external noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07212971A true JPH07212971A (en) | 1995-08-11 |
Family
ID=12102291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6023141A Pending JPH07212971A (en) | 1994-01-25 | 1994-01-25 | Protection of power circuit from external noise |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07212971A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017147909A (en) * | 2016-02-19 | 2017-08-24 | 横河電機株式会社 | Surge protection device and field equipment mounting the same |
-
1994
- 1994-01-25 JP JP6023141A patent/JPH07212971A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017147909A (en) * | 2016-02-19 | 2017-08-24 | 横河電機株式会社 | Surge protection device and field equipment mounting the same |
| US10418807B2 (en) | 2016-02-19 | 2019-09-17 | Yokogawa Electric Corporation | Surge protection device and field device including surge protection device |
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