JPS55135907A - Conversion circuit of ac input of sequence control device - Google Patents
Conversion circuit of ac input of sequence control deviceInfo
- Publication number
- JPS55135907A JPS55135907A JP4272079A JP4272079A JPS55135907A JP S55135907 A JPS55135907 A JP S55135907A JP 4272079 A JP4272079 A JP 4272079A JP 4272079 A JP4272079 A JP 4272079A JP S55135907 A JPS55135907 A JP S55135907A
- Authority
- JP
- Japan
- Prior art keywords
- current
- diode
- voltage
- flows
- becomes
- 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)
Abstract
PURPOSE: To reduce the power consumption by providing a constant-voltage element and a current limiting resistor in parallel with an isolator and a switching element.
CONSTITUTION: When a limit switch LS is closed, current I1 flows through the resistor R3, when the potential difference between the points P1 and P2 is raised exceeding Zener voltage of the Zener diode ZD, current I2 flows, and the terminal voltage of the diode is lowered suddenly. Furthermore, when the current I2 rises up and the potential difference between the points P1 and P2 becomes ON voltage of the switching element SBS, current I3 flows toward the photo-coupler. Resulting from the foregoing, most of the currents I2 which have flowed in the diode ZD flow toward the photo-coupler PC and the element SBS as the current I3, the voltage applied to the diode ZD is lowered, becomes below Zener voltage finally, and the diode ZD becomes a cut-off status. Accordingly, the current I2 does not flow in case the element SBS is ON.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4272079A JPS55135907A (en) | 1979-04-09 | 1979-04-09 | Conversion circuit of ac input of sequence control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4272079A JPS55135907A (en) | 1979-04-09 | 1979-04-09 | Conversion circuit of ac input of sequence control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55135907A true JPS55135907A (en) | 1980-10-23 |
Family
ID=12643895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4272079A Pending JPS55135907A (en) | 1979-04-09 | 1979-04-09 | Conversion circuit of ac input of sequence control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55135907A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5845007U (en) * | 1981-09-21 | 1983-03-26 | リョービ株式会社 | Paper binding mechanism in paper binding/folding machine |
JPS625404A (en) * | 1985-07-01 | 1987-01-12 | Shinko Electric Co Ltd | Signal level converter |
-
1979
- 1979-04-09 JP JP4272079A patent/JPS55135907A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5845007U (en) * | 1981-09-21 | 1983-03-26 | リョービ株式会社 | Paper binding mechanism in paper binding/folding machine |
JPS625404A (en) * | 1985-07-01 | 1987-01-12 | Shinko Electric Co Ltd | Signal level converter |
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