JPS55159628A - Switching unit - Google Patents

Switching unit

Info

Publication number
JPS55159628A
JPS55159628A JP6787979A JP6787979A JPS55159628A JP S55159628 A JPS55159628 A JP S55159628A JP 6787979 A JP6787979 A JP 6787979A JP 6787979 A JP6787979 A JP 6787979A JP S55159628 A JPS55159628 A JP S55159628A
Authority
JP
Japan
Prior art keywords
circuit
led7
illumination
current
illuminated
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.)
Granted
Application number
JP6787979A
Other languages
Japanese (ja)
Other versions
JPS6134694B2 (en
Inventor
Yoshihisa Ishigami
Hideki Fukusono
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP6787979A priority Critical patent/JPS55159628A/en
Publication of JPS55159628A publication Critical patent/JPS55159628A/en
Publication of JPS6134694B2 publication Critical patent/JPS6134694B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Abstract

PURPOSE:To avoid the increase in leakage current, by connecting the absorber circuit when a current from AC power input is interrupted to an inductive load, and avoiding the connection in other cases. CONSTITUTION:When an operating switch 4 is closed and a DC voltage Vi is fed to a solid state relay 2, a transistor (Tr)8 is ON and a capacitor C is charged. On the other hand, a current flows to an inductive load L. In this case, since Tr9 is OFF, LED7 is not illuminated and an absorber circuit 5 is not connected. Next, when the switch 4 is OFF, the relay 2 is OFF and the current flowing to the load L is interrupted. Simultaneously, Tr8 is OFF and Tr9 is ON. Thus, the capacitor C is discharged and LED7 is illuminated. This illumination turns on the photo Tr6 and the circuit 5 is connected. Thus, the differentiating wave produced at OFF state is absorbed at the circuit 5. The illumination of LED7 is determined with the discharge time constant of CR and Tr6 is OFF after the stop of illumination.
JP6787979A 1979-05-31 1979-05-31 Switching unit Granted JPS55159628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6787979A JPS55159628A (en) 1979-05-31 1979-05-31 Switching unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6787979A JPS55159628A (en) 1979-05-31 1979-05-31 Switching unit

Publications (2)

Publication Number Publication Date
JPS55159628A true JPS55159628A (en) 1980-12-11
JPS6134694B2 JPS6134694B2 (en) 1986-08-08

Family

ID=13357626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6787979A Granted JPS55159628A (en) 1979-05-31 1979-05-31 Switching unit

Country Status (1)

Country Link
JP (1) JPS55159628A (en)

Also Published As

Publication number Publication date
JPS6134694B2 (en) 1986-08-08

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