JPH03127904U - - Google Patents
Info
- Publication number
- JPH03127904U JPH03127904U JP3606790U JP3606790U JPH03127904U JP H03127904 U JPH03127904 U JP H03127904U JP 3606790 U JP3606790 U JP 3606790U JP 3606790 U JP3606790 U JP 3606790U JP H03127904 U JPH03127904 U JP H03127904U
- Authority
- JP
- Japan
- Prior art keywords
- input
- input signal
- terminal
- photocoupler
- series
- 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
Landscapes
- Programmable Controllers (AREA)
- Electronic Switches (AREA)
Description
第１図は、この考案の一実施例による交直共用
入力カードを示す概略展開図、第２図は、従来の
ＤＣ入力カード及びＡＣ入力カードを示す概略展
開図である。
図において、１は外部スイツチ、２は外部ＡＣ
電源、３は外部ＤＣ電源、４はカードの入力端子
、６，６Ａ，６Ｂは抵抗器、７はコンデンサ、８
は整流回路素子、９はフオトカプラ、１０は内部
回路、１１はＤＣコモン端子、１２はＡＣコモン
端子、１００は入力カードを示す。なお、図中、
同一符号同一、又は相当部分を示す。
FIG. 1 is a schematic developed view showing an AC/DC common input card according to an embodiment of the invention, and FIG. 2 is a schematic developed view showing a conventional DC input card and an AC input card. In the figure, 1 is an external switch, 2 is an external AC
Power supply, 3 is external DC power supply, 4 is card input terminal, 6, 6A, 6B are resistors, 7 is capacitor, 8
1 is a rectifier circuit element, 9 is a photocoupler, 10 is an internal circuit, 11 is a DC common terminal, 12 is an AC common terminal, and 100 is an input card. In addition, in the figure,
The same reference numerals indicate the same or equivalent parts.
Claims (1)
上記フオトカプラの１次側に直列に接続された第
１の抵抗器と、上記第１の抵抗器に直列に挿入さ
れ、上記入力信号が交流入力信号の場合に上記入
力信号を整流する整流手段とを有する複数の入力
信号絶縁回路を備え、上記複数の入力絶縁回路の
共通入力線側の共通入力端子として、直流入力信
号を入力する直流用入力端子と、入力電流を制限
すると共に入力電圧を分圧して状フオトカプラに
入力するように、抵抗器もしくはコンデンサが上
記共通入力線に直列に挿入された交流入力信号を
入力する交流用端子とを有することを特徴とする
交直両用入力ユニツト。 A photocoupler that isolates the input signal and outputs it,
a first resistor connected in series to the primary side of the photocoupler; and a rectifier inserted in series with the first resistor to rectify the input signal when the input signal is an AC input signal. The common input terminal on the common input line side of the plurality of input isolation circuits is a DC input terminal for inputting a DC input signal, and a DC input terminal for limiting the input current and dividing the input voltage. 1. An AC/DC input unit comprising: an AC terminal for inputting an AC input signal to which a resistor or a capacitor is inserted in series with the common input line so as to input the AC input signal to the photocoupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3606790U JPH03127904U (en) | 1990-04-03 | 1990-04-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3606790U JPH03127904U (en) | 1990-04-03 | 1990-04-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03127904U true JPH03127904U (en) | 1991-12-24 |
Family
ID=31541977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3606790U Pending JPH03127904U (en) | 1990-04-03 | 1990-04-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03127904U (en) |
-
1990
- 1990-04-03 JP JP3606790U patent/JPH03127904U/ja active Pending