JPS55135910A - Output circuit unit of sequence control device - Google Patents

Output circuit unit of sequence control device

Info

Publication number
JPS55135910A
JPS55135910A JP4272179A JP4272179A JPS55135910A JP S55135910 A JPS55135910 A JP S55135910A JP 4272179 A JP4272179 A JP 4272179A JP 4272179 A JP4272179 A JP 4272179A JP S55135910 A JPS55135910 A JP S55135910A
Authority
JP
Japan
Prior art keywords
thyristor
photo
coupler
case
loop
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
JP4272179A
Other languages
Japanese (ja)
Inventor
Masanori Wakuta
Junichi Sasaki
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.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co 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 Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP4272179A priority Critical patent/JPS55135910A/en
Publication of JPS55135910A publication Critical patent/JPS55135910A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Voltage And Current In General (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To make it possible to detect disconnection of the external load at an early stage, by providing an isolator element such as a photo-coupler, etc. in the output circuit. CONSTITUTION:When a gate signal is provided to the gate G of a thyristor T1, a loop consisting of an AC power supply AC. S, the external load L1 and the thyristor T1 becomes the conducting state. Since a current does not flow into a capacitor C1, a resistor R1 and a photo-coupler PC1 in the above state, its logical output A' becomes ''1''. Although a current flows into the loop of AC.S PC1 R1 C1 L1 AC.S in case the thyristor T1 is in OFF state, the impedance of C1, R1 and PC1 is selected so that the load L1 cannot be driven by the current value i in this case, and on the other hand in order that the logical output A' of the output terminal a1 of the photo detector d2 can be ''0'' by a constant ray emitted by LED d1 of the photo-coupler PC1. Accordingly, when the thyristor T1 is not ignited, in case of A'=1, it can be detected that the loop is disconnected somewhere ahead.
JP4272179A 1979-04-09 1979-04-09 Output circuit unit of sequence control device Pending JPS55135910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4272179A JPS55135910A (en) 1979-04-09 1979-04-09 Output circuit unit of sequence control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4272179A JPS55135910A (en) 1979-04-09 1979-04-09 Output circuit unit of sequence control device

Publications (1)

Publication Number Publication Date
JPS55135910A true JPS55135910A (en) 1980-10-23

Family

ID=12643923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4272179A Pending JPS55135910A (en) 1979-04-09 1979-04-09 Output circuit unit of sequence control device

Country Status (1)

Country Link
JP (1) JPS55135910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57187705A (en) * 1981-05-13 1982-11-18 Matsushita Electric Works Ltd Output monitoring circuit for sequencer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145456U (en) * 1974-10-01 1976-04-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5145456U (en) * 1974-10-01 1976-04-03

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57187705A (en) * 1981-05-13 1982-11-18 Matsushita Electric Works Ltd Output monitoring circuit for sequencer

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