JPS5553701A - Output switching circuit - Google Patents
Output switching circuitInfo
- Publication number
- JPS5553701A JPS5553701A JP12588378A JP12588378A JPS5553701A JP S5553701 A JPS5553701 A JP S5553701A JP 12588378 A JP12588378 A JP 12588378A JP 12588378 A JP12588378 A JP 12588378A JP S5553701 A JPS5553701 A JP S5553701A
- Authority
- JP
- Japan
- Prior art keywords
- switching
- light
- output
- switching circuit
- photo
- 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
- Safety Devices In Control Systems (AREA)
Abstract
PURPOSE: To secure the insulation between the signal sources while featuring the contactless structure by installing the 1st and 2nd photo couplers.
CONSTITUTION: Switching circuit 11 provided in output switching circuit 2 possesses command circuit parts 14A and 14B (containing photo couplers YA and YB each) corresponding to signal sources 1A and 1B. And YA and YB emit the light when connected to power source E0 via switch command contacts S2a and S2b to turn on switching transistor Tr of the output end plus Y3a and Y3b each. Then 2nd photo coupler XAO1 and XAO2 of 1st and 2nd switching circuits 12 and 13 emit the light according to the ON/OFF state of switching TrGA1 and GA2 of sources 1A and 1B when Y3a is turned on. The output ends of the photo couplers are connected to E0 via load resistances XA0 and XB0 each. Thus "0" and "1" are delivered from the photo coupler emitted the light and that emitted no light respectively to be transmitted in the form of switching output U and V from source 1A.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12588378A JPS5553701A (en) | 1978-10-13 | 1978-10-13 | Output switching circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12588378A JPS5553701A (en) | 1978-10-13 | 1978-10-13 | Output switching circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5553701A true JPS5553701A (en) | 1980-04-19 |
Family
ID=14921274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12588378A Pending JPS5553701A (en) | 1978-10-13 | 1978-10-13 | Output switching circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5553701A (en) |
-
1978
- 1978-10-13 JP JP12588378A patent/JPS5553701A/en active Pending
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