JPH03252797A - Alarm monitoring device - Google Patents
Alarm monitoring deviceInfo
- Publication number
- JPH03252797A JPH03252797A JP5097890A JP5097890A JPH03252797A JP H03252797 A JPH03252797 A JP H03252797A JP 5097890 A JP5097890 A JP 5097890A JP 5097890 A JP5097890 A JP 5097890A JP H03252797 A JPH03252797 A JP H03252797A
- Authority
- JP
- Japan
- Prior art keywords
- external alarm
- alarm contact
- contact
- resistor
- capacitor
- 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
- 238000012806 monitoring device Methods 0.000 title claims description 10
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 230000007547 defect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、外部警報接点が閉じることにより、内蔵電源
より外部警報接点に電流が流れて警報の入力が行なわれ
る警報監視装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an alarm monitoring device in which when an external alarm contact is closed, a current flows from a built-in power supply to the external alarm contact, thereby inputting an alarm.
〔従来の技術１
従来、この種の警報監視装置では、省電力化のために外
部警報接点に常に低い値の電流が流されていた。[Prior Art 1] Conventionally, in this type of alarm monitoring device, a low value of current was always passed through the external alarm contact in order to save power.
上述した従来の警報監視装置は、外部警報接点に流す電
流が、常時低い値となっているので、外部警報接点によ
っては最小開閉負荷の条件をはずれるため接点障害を起
こし警報が正常に入力されないという欠点がある。In the conventional alarm monitoring device described above, the current flowing through the external alarm contact is always at a low value, so depending on the external alarm contact, the minimum switching load condition is exceeded, causing a contact failure and preventing the alarm from being input properly. There are drawbacks.
本発明の目的は、省電力を維持しながら、接点障害を起
こさない警報監視装置を提供することである。An object of the present invention is to provide an alarm monitoring device that does not cause contact failure while maintaining power saving.
［課題を解決するための手段〕
本発明の警報監視装置は、内蔵電源と外部警報接点の間
に抵抗が接続され、外部警報接点と抵抗に対して並列に
コンデンサが接続されている。[Means for Solving the Problems] In the alarm monitoring device of the present invention, a resistor is connected between a built-in power supply and an external alarm contact, and a capacitor is connected in parallel to the external alarm contact and the resistor.
外部警報接点が開いている間は、コンデンサは内蔵電源
により充電されている。外部警報接点が閉じた瞬間は放
電電流がコンデンサから抵抗を介して外部警報接点に流
れる。定常状態になった後は、内蔵電源から外部警報接
点に電流が流れる。While the external alarm contact is open, the capacitor is being charged by the internal power supply. At the moment the external alarm contact is closed, a discharge current flows from the capacitor to the external alarm contact via the resistor. After the steady state is reached, current flows from the built-in power supply to the external alarm contact.
内蔵電源と外部警報接点の間には前記抵抗とは別の抵抗
が接続されているので、外部警報接点を閉じた瞬間の方
が定常状態よりも外部警報接点に流れる電流が多い。Since a resistor other than the above-mentioned resistor is connected between the built-in power supply and the external alarm contact, more current flows through the external alarm contact at the moment the external alarm contact is closed than in a steady state.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示す警報監視装置の回路図
である。FIG. 1 is a circuit diagram of an alarm monitoring device showing one embodiment of the present invention.
外部警報接点１は一端が接地され、他端は抵抗４（抵抗
値Ｒ２）、ホトカブラ５のＬＥＤ側、抵抗３（抵抗値Ｒ
，）を介してインタフェース電源２（電源電圧Ｖ＋）に
接続されている。そして抵抗４と外部警報接点１に対し
て並列にコンデンサ６が接続されている。これらは警報
入力回路を構成している。一方、データ処理部８はロジ
ック用電源７とホトカブラ５のホトトラジスタに接続さ
れており、外部警報接点１が閉じるとホトカブラ５のＬ
ＥＤ側に電流が流れホトトランジスタがオンすることに
より、データ処理部８に外部警報接点１が閉じたことが
伝えられ、必要なデータ処理が行なわれる。One end of the external alarm contact 1 is grounded, the other end is connected to the resistor 4 (resistance value R2), the LED side of the photocoupler 5, and the resistor 3 (resistance value R2).
, ) to the interface power supply 2 (power supply voltage V+). A capacitor 6 is connected in parallel to the resistor 4 and the external alarm contact 1. These constitute an alarm input circuit. On the other hand, the data processing unit 8 is connected to the logic power supply 7 and the phototransistor of the photocoupler 5, and when the external alarm contact 1 closes, the photocoupler 5
When current flows to the ED side and the phototransistor turns on, the data processing section 8 is informed that the external alarm contact 1 has closed, and necessary data processing is performed.
次に、本実施例の動作を説明する。Next, the operation of this embodiment will be explained.
外部警報接点１が開いている間は、コンデンサ６はイン
タフェース電源２により充電されている。外部警報接点
１が閉じた瞬間は、放電電流がコンデンサ６から抵抗４
を介して外部警報接点ｌに流れその値１１は、１．＝Ｖ
Ｉ／Ｒ２である。While the external alarm contact 1 is open, the capacitor 6 is being charged by the interface power supply 2. At the moment when external alarm contact 1 closes, the discharge current flows from capacitor 6 to resistor 4.
through the external alarm contact l, whose value 11 is 1. =V
It is I/R2.
定常状態になった後はインタフェース電源２から抵抗３
、ホトカブラ５そして抵抗４を介して外部警報接点１に
電流が流れる。この電流の値■２はＩｚ＝ （ｖ＋−
ｖｚ）／（Ｒ＋＋Ｒｉ）で与えられる。ここで、■２は
ホトカブラ５の順方向電圧降下である。したがってＩＩ
＞Ｉ２であり、外部警報接点１が閉じた瞬間、外部警報
接点１に大きい電流が流れることになる。After reaching steady state, connect resistor 3 from interface power supply 2.
, photocoupler 5 and resistor 4 to external alarm contact 1 . The value of this current ■2 is Iz= (v+-
vz)/(R++Ri). Here, (2) is the forward voltage drop of the photocoupler 5. Therefore II
>I2, and a large current will flow through the external alarm contact 1 at the moment the external alarm contact 1 closes.
なお、この後ホトカブラ５がオンして、データ処理部８
に外部警報接点１が閉じたことが伝えられ、必要な処理
が行なわれる。Note that after this, the photocoupler 5 is turned on, and the data processing section 8
is notified that the external alarm contact 1 has closed, and necessary processing is performed.
［発明の効果］
以上説明したように本発明は、内蔵電源と外部警報接点
の間に抵抗を接続し、外部警報接点と抵抗に並列にコン
デンサを接続することにより、外部警報接点が閉じた瞬
間だけ大きな電流が流れるので、接点障害を起こさない
という効果がある。[Effects of the Invention] As explained above, the present invention connects a resistor between the built-in power supply and the external alarm contact, and connects a capacitor in parallel to the external alarm contact and the resistor. This has the effect of preventing contact failure because a large current flows through it.
第１図は本発明の一実施例を示す警報監視装置の回路図
である。
１・・・外部警報接点、
２・・・インタフェース電源、
３・・・抵抗、 ４・・・抵抗、５・・・
ホトカブラ、 ６・・・コンデンサ、７・・・ロ
ジック用電源、 ８・・・データ処理部。FIG. 1 is a circuit diagram of an alarm monitoring device showing one embodiment of the present invention. 1... External alarm contact, 2... Interface power supply, 3... Resistor, 4... Resistor, 5...
Photocoupler, 6... Capacitor, 7... Logic power supply, 8... Data processing section.
Claims (1)
外部警報接点に電流が流れて警報の入力が行なわれる警
報監視装置において、 内蔵電源と外部警報接点の間に抵抗が接続され、外部警
報接点と抵抗に対して並列にコンデンサが接続されてい
ることを特徴とする警報監視装置。[Claims] 1. In an alarm monitoring device in which when an external alarm contact closes, a current flows from the built-in power supply to the external alarm contact and an alarm is input, a resistance is provided between the built-in power supply and the external alarm contact. an alarm monitoring device, characterized in that a capacitor is connected in parallel to the external alarm contact and the resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5097890A JPH03252797A (en) | 1990-03-01 | 1990-03-01 | Alarm monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5097890A JPH03252797A (en) | 1990-03-01 | 1990-03-01 | Alarm monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03252797A true JPH03252797A (en) | 1991-11-12 |
Family
ID=12873900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5097890A Pending JPH03252797A (en) | 1990-03-01 | 1990-03-01 | Alarm monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03252797A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016103181A (en) * | 2014-11-28 | 2016-06-02 | 株式会社テクノス | Activity detection device |
-
1990
- 1990-03-01 JP JP5097890A patent/JPH03252797A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016103181A (en) * | 2014-11-28 | 2016-06-02 | 株式会社テクノス | Activity detection device |
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