CN211263724U - Marine circuit for detecting disconnection and short circuit of switching value - Google Patents
Marine circuit for detecting disconnection and short circuit of switching value Download PDFInfo
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- CN211263724U CN211263724U CN201921859936.4U CN201921859936U CN211263724U CN 211263724 U CN211263724 U CN 211263724U CN 201921859936 U CN201921859936 U CN 201921859936U CN 211263724 U CN211263724 U CN 211263724U
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Abstract
The utility model provides a marine circuit that detects switching value disconnection and short circuit, including the switching value sensor that contains the contact, with the PLC and the detection circuitry that switching value sensor passes through the signal transmission cable and connects, detection circuitry include first resistance R1, second resistance R2, third resistance R3, first resistance R1 is established ties on the signal transmission cable between PLC and switching value sensor, second resistance R2 and third resistance R3 are parallelly connected at the both ends of switching value sensor contact, and second resistance (R2) is parallelly connected at the both ends of switching value sensor. A switch 103 is arranged between the two contacts of the switching value sensor. The first resistor R1 is a resistor of 1.5k omega, the second resistor R2 is a resistor of 1.5k omega, and the third resistor R3 is a resistor of 0.5k omega. The utility model discloses easy to carry out can realize switching value broken string and short circuit.
Description
Technical Field
The utility model belongs to the technical field of digital industrial control, concretely design marine circuit of detection switching value broken string and short circuit.
Background
In the ship control application, according to the requirements of the classification society, the PLC module used on the ship needs to realize the detection of the disconnection and the short circuit of the switching value, the PLC module is simple to judge the disconnection and the closing of the switching value, and only the switching value acquisition module is connected, but most of the PLCs cannot realize the disconnection and the short circuit of the switching value.
SUMMERY OF THE UTILITY MODEL
To solve the above problems, a circuit for detecting disconnection and short circuit of a switching value for a ship is provided.
The purpose of the utility model is realized with the following mode:
the utility model provides a marine circuit that detects switching value disconnection and short circuit, including the switching value sensor that contains the contact, with the PLC and the detection circuitry that switching value sensor passes through the signal transmission cable and connects, detection circuitry include first resistance R1, second resistance R2, third resistance R3, first resistance R1 is established ties on the signal transmission cable between PLC and switching value sensor, second resistance R2 and third resistance R3 are parallelly connected at the both ends of switching value sensor contact, and second resistance (R2) is parallelly connected at the both ends of switching value sensor.
A switch 103 is arranged between the two contacts of the switching value sensor.
The first resistor R1 is a resistor of 1.5k omega, the second resistor R2 is a resistor of 1.5k omega, and the third resistor R3 is a resistor of 0.. 5k omega.
The utility model has the advantages that: the switching value disconnection and short circuit can be realized.
Drawings
Fig. 1 is a detection circuit of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A circuit for detecting disconnection and short circuit of a switching value for a ship comprises a switching value sensor 102 with contacts, a PLC 101 connected with the switching value sensor through a signal transmission cable, and a detection circuit, wherein the detection circuit comprises a first resistor R1, a second resistor R2 and a third resistor R3, the first resistor R1 is connected on the signal transmission cable between the PLC and the switching value sensor in series, the second resistor R2 and the third resistor R3 are connected between two contacts of the switching value sensor in parallel, and the second resistor R2 is connected at two ends of the switching value sensor in parallel. The parallel position may be between any two contacts of the switching value sensor, or between two adjacent contacts.
A switch 103 is arranged between the two contacts of the switching value sensor.
The first resistor R1 is a resistor of 1.5k omega, the second resistor R2 is a resistor of 1.5k omega, and the third resistor R3 is a resistor of 0.. 5k omega.
In the circuit shown in fig. 1, a first resistor R1 of 1.5K,0.5W is connected in series to the signal transmission cable between the PLC and the switching value sensor, and a second resistor R2 of 1.5K,0.5W and a third resistor R3 of 0.5W, a second resistor R2 and a third resistor R3 are connected in series to both ends of the contact of the switching value sensor, and a second resistor R2 is connected in parallel to both ends of the switching value sensor so that the state of the switching value can be judged by judging the current flowing into the collecting channel:
under normal conditions:
A. in the case of an open sensor contact, the channel current is 24V/(1.5K +1.5K) = 8 ± 1 mA;
B. when the sensor contact is closed, the current of the channel is 24V/(1.5K + 0.5K) = 12 +/-1 mA;
C. when the sensor is disconnected, the current of the channel is 24V/∞ =0 mA;
D. in case of short circuit of the sensor, the current of the channel 24V/1.5k = 16 ± 1 mA;
by judging these values, the conditions present in the cable and the sensor can be derived.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Claims (3)
1. A circuit for detecting disconnection and short circuit of a switching value for a ship is characterized in that: including the switching value sensor who contains the contact, with the PLC and the detection circuitry that the switching value sensor passes through the signal transmission cable and connects, detection circuitry include first resistance (R1), second resistance (R2), third resistance (R3), first resistance (R1) is established ties on the signal transmission cable between PLC and switching value sensor, second resistance (R2) and third resistance (R3) are parallelly connected between two contacts of switching value sensor, and second resistance (R2) parallelly connected at the both ends of switching value sensor.
2. The marine circuit for detecting a disconnection and a short circuit of a switching value according to claim 1, wherein: and a switch is arranged between the two contacts of the switching value sensor.
3. The marine circuit for detecting a disconnection and a short circuit of a switching value according to claim 1, wherein: the first resistor (R1) is a resistor of 1.5k omega, the second resistor (R2) is a resistor of 1.5k omega, and the third resistor (R3) is a resistor of 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859936.4U CN211263724U (en) | 2019-10-31 | 2019-10-31 | Marine circuit for detecting disconnection and short circuit of switching value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859936.4U CN211263724U (en) | 2019-10-31 | 2019-10-31 | Marine circuit for detecting disconnection and short circuit of switching value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211263724U true CN211263724U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921859936.4U Active CN211263724U (en) | 2019-10-31 | 2019-10-31 | Marine circuit for detecting disconnection and short circuit of switching value |
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| CN (1) | CN211263724U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156335A (en) * | 2021-05-09 | 2021-07-23 | 武汉捷成电力科技有限公司 | Vortex shedding flowmeter disconnection detection circuit, method, controller and storage medium |
| CN117368798A (en) * | 2023-12-04 | 2024-01-09 | 浙江国利信安科技有限公司 | Fault detection circuit and related circuitry |
-
2019
- 2019-10-31 CN CN201921859936.4U patent/CN211263724U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156335A (en) * | 2021-05-09 | 2021-07-23 | 武汉捷成电力科技有限公司 | Vortex shedding flowmeter disconnection detection circuit, method, controller and storage medium |
| CN117368798A (en) * | 2023-12-04 | 2024-01-09 | 浙江国利信安科技有限公司 | Fault detection circuit and related circuitry |
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