JPH0250720U - - Google Patents
Info
- Publication number
- JPH0250720U JPH0250720U JP13034488U JP13034488U JPH0250720U JP H0250720 U JPH0250720 U JP H0250720U JP 13034488 U JP13034488 U JP 13034488U JP 13034488 U JP13034488 U JP 13034488U JP H0250720 U JPH0250720 U JP H0250720U
- Authority
- JP
- Japan
- Prior art keywords
- contact
- output relay
- heater
- control system
- temperature control
- 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 description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control Of Temperature (AREA)
Description
第１図は本考案の一実施例に係る温度制御シス
テムにおける出力リレーの接点溶着検出回路の回
路図、第２図は動作説明用のタイムチヤートであ
る。
２…電気炉、４…ヒータ、６…熱電対、８…電
源、１０…電磁開閉器（出力リレー）、１０ａ…
接点、１０ｂ…コイル、１２…温度調節器、１４
…本実施例の接点溶着検出回路、１６ａ，１６ｂ
…発光ダイオード、１８…受光トランジスタ、２
０…ＡＮＤ回路、Ｓ１…制御信号、Ｓ２…受光ト
ランジスタの出力、Ｓ３…ＡＮＤ回路の出力（接
点溶着検出信号）。
FIG. 1 is a circuit diagram of a contact welding detection circuit of an output relay in a temperature control system according to an embodiment of the present invention, and FIG. 2 is a time chart for explaining the operation. 2... Electric furnace, 4... Heater, 6... Thermocouple, 8... Power supply, 10... Electromagnetic switch (output relay), 10a...
Contact, 10b...Coil, 12...Temperature controller, 14
...Contact welding detection circuit of this embodiment, 16a, 16b
...Light emitting diode, 18...Light receiving transistor, 2
0...AND circuit, S1...control signal, S2...output of light receiving transistor, S3...output of AND circuit (contact welding detection signal).
Claims (1)
ヒータを加熱駆動する電源と、この電源に直列に
接続された接点を有し、かつ制御信号に応答して
当該接点を開閉駆動する出力リレーと、前記出力
リレーに制御信号を出力する温度調節器とを備え
た温度制御システムに備えられるものであつて、 前記接点に並列に接続された発光ダイオードと
、 前記発光ダイオードの発光を受けてオン・オフ
する受光トランジスタと、 一方の入力部に前記制御信号が、また、他方の
入力部に前記受光トランジスタの出力がそれぞれ
与えられるＡＮＤ回路 とを具備したことを特徴とする、温度制御シス
テムにおける出力リレーの接点溶着検出回路。[Claims for Utility Model Registration] A heater, a power supply connected in series to the heater to heat and drive the heater, and a contact connected in series to the power supply, and in response to a control signal, the contact A temperature control system comprising: an output relay that opens and closes an output relay; and a temperature controller that outputs a control signal to the output relay, the temperature control system comprising: a light emitting diode connected in parallel to the contact; The invention is characterized by comprising: a light-receiving transistor that is turned on and off in response to the light emission of , Output relay contact welding detection circuit in temperature control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13034488U JPH0250720U (en) | 1988-10-04 | 1988-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13034488U JPH0250720U (en) | 1988-10-04 | 1988-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0250720U true JPH0250720U (en) | 1990-04-10 |
Family
ID=31385430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13034488U Pending JPH0250720U (en) | 1988-10-04 | 1988-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0250720U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5882314A (en) * | 1981-11-10 | 1983-05-17 | Kubota Ltd | Controller for reaping height of reaping and harvesting machine |
-
1988
- 1988-10-04 JP JP13034488U patent/JPH0250720U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5882314A (en) * | 1981-11-10 | 1983-05-17 | Kubota Ltd | Controller for reaping height of reaping and harvesting machine |
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