JPS5534813A - Relay-driving circuit with fall-safe output - Google Patents
Relay-driving circuit with fall-safe outputInfo
- Publication number
- JPS5534813A JPS5534813A JP10626278A JP10626278A JPS5534813A JP S5534813 A JPS5534813 A JP S5534813A JP 10626278 A JP10626278 A JP 10626278A JP 10626278 A JP10626278 A JP 10626278A JP S5534813 A JPS5534813 A JP S5534813A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- transistor
- output
- failure
- fall
- 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
Links
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
PURPOSE: To actuate a failure-sensing relay by driving individual output relays by an alternating signals from individual logic circuits, obtaining "or" of currents flowing into these output relays, taking out only an ac component of the "or", and rectifying it.
CONSTITUTION: When the circuit 11 among logic circuits 11W1N fails, and high- level dc output is sent out to an amplification transistor 21 to turn it on, or when the transistor 21 fails and its output, which is used to drive an output relay 31, is continuously applied to the relay 31, a bias current is continuously flown through a transistor 4, and it is turned on. Therefore, a current does not flow to a failure- sensing relay 8, which is connected to the transistor 4 through a transistor 5, a transformer 6, and a rectifier 7, and the relay is turned off, thereby the failure can be sensed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53106262A JPS6032403B2 (en) | 1978-09-01 | 1978-09-01 | Fail-safe signal output device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53106262A JPS6032403B2 (en) | 1978-09-01 | 1978-09-01 | Fail-safe signal output device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5534813A true JPS5534813A (en) | 1980-03-11 |
JPS6032403B2 JPS6032403B2 (en) | 1985-07-27 |
Family
ID=14429174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53106262A Expired JPS6032403B2 (en) | 1978-09-01 | 1978-09-01 | Fail-safe signal output device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6032403B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01150608U (en) * | 1988-04-02 | 1989-10-18 | ||
JPH0614202U (en) * | 1992-07-27 | 1994-02-22 | 勝也 平岡 | Sidewalk concrete panel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4734142U (en) * | 1971-04-29 | 1972-12-16 |
-
1978
- 1978-09-01 JP JP53106262A patent/JPS6032403B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4734142U (en) * | 1971-04-29 | 1972-12-16 |
Also Published As
Publication number | Publication date |
---|---|
JPS6032403B2 (en) | 1985-07-27 |
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