JPS5923606B2

JPS5923606B2 - Relay operation abnormality detection circuit

Info

Publication number: JPS5923606B2
Application number: JP15937379A
Authority: JP
Inventors: 洋司古本
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 1979-12-03
Filing date: 1979-12-03
Publication date: 1984-06-04
Also published as: JPS5679821A

Description

【発明の詳細な説明】この発明は、リレーの動作を確認し、動作の異常を検出
する回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circuit for checking the operation of a relay and detecting an abnormality in the operation.

従来、この種の回路として、第１図に示すものがあった
。Conventionally, there has been a circuit of this type as shown in FIG.

第１図において、リレー１−１〜１−ｎは、それぞれキ
ープ・リレーよシ成り、接点１−１ａ、１−１ｂ、１
１ｃ、１−１ｄ；〜；１−ｎａ、１−ｎｂ、１ｎｅ
、１−ｎｄを有する。In FIG. 1, relays 1-1 to 1-n are keep relays, and contacts 1-1a, 1-1b, 1
1c, 1-1d; ~; 1-na, 1-nb, 1 ne
, 1-nd.

そして、信号接点として働くスイッチ２の接点２ａ。A contact 2a of the switch 2 serves as a signal contact.

及び各リレー１−１〜１−ｎの接点１−１ａ〜１−（ｎ
−１）ａを用い、接点２ａの閉成を起点として順次リレ
ー１−１〜１−ｎを動作させるように接続している。and contacts 1-1a to 1-(n
-1) A is used to connect the relays 1-1 to 1-n in order to operate them starting from the closing of the contact 2a.

更に、接点１１ｅ、１−１ｄ；〜；１−ｎａ、
１−ｎｄを用い、論理式で示すと、（（１１ｃ）十−−
４（１−ｎｃ））（（１−１ｄ）＋・・・・・・＋（１
−ｎｄ））の条件によりタイム・リレー３を動作させる
接続をしている。Furthermore, the contacts 1 1e, 1-1d; ~; 1-na,
Using 1-nd and expressing it in a logical formula, ((11c) ten--
4(1-nc))((1-1d)+・・・・・・+(1
-nd))) is connected to operate time relay 3.

しかし、このような接続によると、全てのリレーが不動
作となった場合は、タイム・リレー３も不動作となシ、
このような場合の故障を検出することができない。However, according to this type of connection, if all relays become inoperable, time relay 3 will also become inoperable.
Failures in such cases cannot be detected.

従来のリレー動作異常検出回路は、以上のように構成さ
れているので、検出不能となる故障が存在し、またリレ
ーの接点数を多く必要とする欠点があった。Since the conventional relay operation abnormality detection circuit is configured as described above, it has the disadvantage that there are failures that cannot be detected and that a large number of relay contacts are required.

この発明は、前記のような従来のものの欠点を除去する
ためになされたもので、信号接点と、最終段のキープ・
リレーの接点と、タイム・リレーとを直列接続すること
により、全てのリレーが不動作となる故障をも検出でき
るリレー動作異常検出回路を提供することを目的とする
。This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it includes a signal contact and a keep/keep terminal at the final stage.
An object of the present invention is to provide a relay operation abnormality detection circuit capable of detecting a failure in which all relays become inoperable by connecting relay contacts and a time relay in series.

以下、この発明の一実施例を示す第２図について説明す
る。Hereinafter, FIG. 2 showing an embodiment of the present invention will be described.

第２図において、点線で囲む部分は第１図に示したもの
と同一である。In FIG. 2, the portion surrounded by dotted lines is the same as that shown in FIG.

ここでは、タイム・リレー４がリレー１−ｎの接点１−
ｎａ。Here, time relay 4 is connected to contact 1-n of relay 1-n.
na.

１−ｎｂを介してそれぞれスイッチ２の接点２ａ。1-nb respectively through the contacts 2a of the switch 2.

２ｂに接続される。2b.

タイム・リレー４の接点４ａは故障表示用の接点として
外部回路に接続される。A contact 4a of the time relay 4 is connected to an external circuit as a contact for indicating a failure.

動作を説明する。Explain the operation.

スイッチ２の接点２ａを閉成すると、第１図の場合と同
様にリレー１−１〜１−ｎが順次動作をする。When the contact 2a of the switch 2 is closed, the relays 1-1 to 1-n operate in sequence as in the case of FIG.

最終段のリレー１−ｎが動作すると、接点１ｎａが
開く。When the final stage relay 1-n operates, the contact 1na opens.

いま、タイム・リレー４の時限Ｔを接点２ａの動作から
リレー１−ｎの動作までに要する時限以上のものに設定
すると、各リレー１−１〜１−ｎが正常である限り、タ
イム・リレー４が動作に至ることはない。Now, if the time limit T of time relay 4 is set to be longer than the time required from the operation of contact 2a to the operation of relay 1-n, as long as each relay 1-1 to 1-n is normal, the time relay will continue to operate. 4 will never come into action.

しかシ、リレー１−１〜１−ｎのいずれかに異常があっ
たためにリレー１−ｎが不動作となシ、時限Ｔを経過す
ると、タイム・リレー４の接点４ａが閉成するに至る。However, because there is an abnormality in one of relays 1-1 to 1-n, relay 1-n becomes inoperable, and when time limit T elapses, contact 4a of time relay 4 closes. .

即ち、接点４ａの閉成により、すレー１−１〜１−ｎに
故障があることが検出される。That is, by closing the contact 4a, it is detected that there is a failure in the relays 1-1 to 1-n.

なお、前記実施例は１群のリレーについての故障を検出
するものを示したが、第３図に示す他の実施例のように
同一構成から成る複数の群のリレーにって回路を構成し
てもよい。In addition, although the above-mentioned embodiment shows a case where a failure is detected in one group of relays, the circuit may be configured with a plurality of groups of relays having the same configuration as in another embodiment shown in FIG. You can.

以上のように、この発明によれば、信号接点と、最終段
のキープ・リレーの接点と、タイム・リレーとを直列接
続することにより、全キープ・リレーが不動作となる故
障をも検出でき、各キープ・リレーの接点数を少なくす
ることができる。As described above, according to the present invention, by connecting the signal contact, the contact of the final stage keep relay, and the time relay in series, it is possible to detect a failure in which all the keep relays become inoperable. , the number of contacts of each keep relay can be reduced.

[Brief explanation of drawings]

第１図は従来のリレー動作異常検出回路の接続図、第２
図はこの発明の一実施例を示す接続図、第３図はこの発
明の他の実施例を示す接続図である。１−１〜１−ｎ・・・リレー、４・・・タイム・リレー
。なお、図中、同一符号は同一部分を示す。Figure 1 is a connection diagram of a conventional relay operation abnormality detection circuit, Figure 2
The figure is a connection diagram showing one embodiment of the invention, and FIG. 3 is a connection diagram showing another embodiment of the invention. 1-1 to 1-n...Relay, 4...Time relay. In addition, in the figures, the same reference numerals indicate the same parts.

Claims

[Claims]

1 A first relay connected to a common signal contact, and a plurality of second relays including the first relay connected to the signal contact through the contacts of respective adjacent relays and sequentially energized. and said second relay of the last energized connection.
is connected to the signal contact via the contact of the relay and has a time limit longer than the time from the closing of the signal contact to the activation of the contact of the second relay of the last energized connection.・Relay operation abnormality detection circuit equipped with a relay.