JPH01144902U - - Google Patents
Info
- Publication number
- JPH01144902U JPH01144902U JP4060988U JP4060988U JPH01144902U JP H01144902 U JPH01144902 U JP H01144902U JP 4060988 U JP4060988 U JP 4060988U JP 4060988 U JP4060988 U JP 4060988U JP H01144902 U JPH01144902 U JP H01144902U
- Authority
- JP
- Japan
- Prior art keywords
- clock
- relay contact
- analog signal
- signal
- switching
- 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
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Safety Devices In Control Systems (AREA)
Description
第1は本考案に係るアナログ切替回路の一実施
例を示すブロツク図、第2図、第3図および第4
図は第1図に示した実施例の動作を説明するため
に用いられたタイミングチヤート、第5図は従来
のアナログ切替回路を示すブロツク図である。
1,3,9,10,18,20……アンド回路
、2,4,8,17,19……ノツト回路、5,
6,15……フリツプフロツプ、11……第1の
クロツク発生回路、12……第2のクロツク発生
回路、13,21……オア回路、16……タイマ
、22……遅延回路、101……リレー接点、1
02……負荷、103,107……比較回路、1
05……リレー駆動部、106……リレー。
The first is a block diagram showing one embodiment of the analog switching circuit according to the present invention, and FIGS.
This figure is a timing chart used to explain the operation of the embodiment shown in FIG. 1, and FIG. 5 is a block diagram showing a conventional analog switching circuit. 1, 3, 9, 10, 18, 20...AND circuit, 2, 4, 8, 17, 19...Knot circuit, 5,
6, 15...Flip-flop, 11...First clock generation circuit, 12...Second clock generation circuit, 13, 21...OR circuit, 16...Timer, 22...Delay circuit, 101...Relay Contact, 1
02...Load, 103,107...Comparison circuit, 1
05... Relay drive unit, 106... Relay.
Claims (1)
よび第2のアナログ信号のうちのいずれかを送出
するリレー接点と、このリレー接点から前記第1
のアナログ信号および前記第2のアナログ信号の
うちのいずれかを送出時にこれらの信号のレベル
が異なる場合は該リレー接点を切替える制御手段
とを備えたアナログ切替回路において、 前記制御手段は 前記リレー接点の切替タイミングを計る異なる
周期の第1のクロツク信号および第2のクロツク
信号のうちのいずれかを送出するクロツク発生手
段と、 このクロツク発生手段からの短い周期の前記第
1のクロツク信号に基づいて前記リレー接点が所
定の時間に予め設定された回数以上切替えられた
ことを検出する検出手段と、 この検出手段の検出出力に基づいて、前記クロ
ツク発生手段から該第1のクロツク信号の代りに
長い周期の前記第2のクロツク信号を送出するク
ロツク選択手段と を備えたことを特徴とするアナログ切替回路。[Claims for Utility Model Registration] A relay contact that sends out either a first analog signal or a second analog signal that exhibits the same level;
and a control means for switching the relay contact if the levels of these signals are different when sending either of the analog signal and the second analog signal, the control means switching the relay contact. clock generating means for transmitting either a first clock signal or a second clock signal with different cycles to measure the switching timing of the clock; and based on the first clock signal with a short cycle from the clock generating means. a detection means for detecting that the relay contact has been switched a preset number of times or more in a predetermined time; and clock selection means for sending out the second clock signal of a certain period.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4060988U JPH01144902U (en) | 1988-03-28 | 1988-03-28 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4060988U JPH01144902U (en) | 1988-03-28 | 1988-03-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01144902U true JPH01144902U (en) | 1989-10-05 |
Family
ID=31267078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4060988U Pending JPH01144902U (en) | 1988-03-28 | 1988-03-28 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01144902U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017187878A (en) * | 2016-04-04 | 2017-10-12 | アズビル株式会社 | Control device |
-
1988
- 1988-03-28 JP JP4060988U patent/JPH01144902U/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017187878A (en) * | 2016-04-04 | 2017-10-12 | アズビル株式会社 | Control device |