JPH01169822U - - Google Patents

Info

Publication number
JPH01169822U
JPH01169822U JP6661988U JP6661988U JPH01169822U JP H01169822 U JPH01169822 U JP H01169822U JP 6661988 U JP6661988 U JP 6661988U JP 6661988 U JP6661988 U JP 6661988U JP H01169822 U JPH01169822 U JP H01169822U
Authority
JP
Japan
Prior art keywords
circuit
input
photocoupler
output side
waveform shaping
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
Application number
JP6661988U
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP6661988U priority Critical patent/JPH01169822U/ja
Publication of JPH01169822U publication Critical patent/JPH01169822U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Programmable Controllers (AREA)
  • Manipulation Of Pulses (AREA)

Description

【図面の簡単な説明】
第1図は本考案によるPCの入力回路の一実施
例を示す結線図、第2図は従来のPCの入力回路
の一例を示す結線図、第3図はPCの入力回路の
各部の状態を示す波形図である。 5:ホトカプラ、10:コンパレータ、11:
フイルタ回路、13:可変抵抗器。

Claims (1)

    【実用新案登録請求の範囲】
  1. 信号が入力されるホトカプラと、このホトカプ
    ラの出力側が接続されるフイルタ回路と、このフ
    イルタ回路の出力側がその一方の入力端に接続さ
    れ、他方の入力端に制御電圧が基準電圧として接
    続されるコンパレータよりなる波形整形回路とを
    備え、前記波形整形回路のしきい値を可変にした
    ことを特徴とするプログラマブルコントローラの
    入力回路。
JP6661988U 1988-05-20 1988-05-20 Pending JPH01169822U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6661988U JPH01169822U (ja) 1988-05-20 1988-05-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6661988U JPH01169822U (ja) 1988-05-20 1988-05-20

Publications (1)

Publication Number Publication Date
JPH01169822U true JPH01169822U (ja) 1989-11-30

Family

ID=31292018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6661988U Pending JPH01169822U (ja) 1988-05-20 1988-05-20

Country Status (1)

Country Link
JP (1) JPH01169822U (ja)

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