JPH0397253U - - Google Patents
Info
- Publication number
- JPH0397253U JPH0397253U JP545890U JP545890U JPH0397253U JP H0397253 U JPH0397253 U JP H0397253U JP 545890 U JP545890 U JP 545890U JP 545890 U JP545890 U JP 545890U JP H0397253 U JPH0397253 U JP H0397253U
- Authority
- JP
- Japan
- Prior art keywords
- pair
- signal
- external device
- output
- power supply
- 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
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Electronic Switches (AREA)
- Dc Digital Transmission (AREA)
Description
第１図は本考案のデジタル信号入力回路のブロ
ツク図、第２図は正極性電源を有する外部機器に
対応する本考案の実施例の回路図、第３図は負極
性電源を有する外部機器に対応する本考案の実施
例の回路図、第４図はフリー接点出力を有する外
部機器に対応する本考案の実施例の回路図、第５
図〜第７図は従来技術を示す回路図である。
主要部分の符号の説明、１ａ，１ｂ，１ｃ……
信号線切替回路、１１〜１３……外部機器、２０
ａ，２０ｂ，２０ｃ……信号伝達素子。
Fig. 1 is a block diagram of the digital signal input circuit of the present invention, Fig. 2 is a circuit diagram of an embodiment of the present invention corresponding to an external device having a positive polarity power supply, and Fig. 3 is a block diagram of an embodiment of the present invention corresponding to an external device having a negative polarity power supply. FIG. 4 is a circuit diagram of a corresponding embodiment of the present invention, and FIG. 5 is a circuit diagram of an embodiment of the present invention corresponding to an external device having a free contact output.
7 to 7 are circuit diagrams showing the prior art. Explanation of symbols of main parts, 1a, 1b, 1c...
Signal line switching circuit, 11-13...External device, 20
a, 20b, 20c...signal transmission elements.
Claims (1)
用いて、外部機器からの信号を入力する信号入力
回路であつて、前記外部機器からの１対の信号出
力線と夫々接続された１対の入力端子と、前記信
号伝達素子への１対の信号入力線と夫々接続され
た１対の出力端子と、電源が供給される電源端子
と、アース端子と、これ等１対の入力端子、１対
の出力端子、電源端子及びアース端子とを所望に
接続自在な切替手段とを有することを特徴とする
信号入力回路。 A signal input circuit that inputs a signal from an external device using a signal transmission element whose input side and output side are insulated, and a pair of signal output lines each connected to a pair of signal output lines from the external device. a pair of output terminals each connected to a pair of signal input lines to the signal transmission element, a power supply terminal to which power is supplied, a ground terminal, and a pair of input terminals, 1. A signal input circuit comprising a pair of output terminals, a power supply terminal, and a ground terminal, and switching means that can be freely connected to each other as desired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP545890U JPH0397253U (en) | 1990-01-24 | 1990-01-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP545890U JPH0397253U (en) | 1990-01-24 | 1990-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0397253U true JPH0397253U (en) | 1991-10-07 |
Family
ID=31509170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP545890U Pending JPH0397253U (en) | 1990-01-24 | 1990-01-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0397253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012075032A (en) * | 2010-09-29 | 2012-04-12 | Brother Ind Ltd | Output circuit and output device |
-
1990
- 1990-01-24 JP JP545890U patent/JPH0397253U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012075032A (en) * | 2010-09-29 | 2012-04-12 | Brother Ind Ltd | Output circuit and output device |
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