CN220399816U - Output circuit board - Google Patents
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- CN220399816U CN220399816U CN202322220095.5U CN202322220095U CN220399816U CN 220399816 U CN220399816 U CN 220399816U CN 202322220095 U CN202322220095 U CN 202322220095U CN 220399816 U CN220399816 U CN 220399816U
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- 230000002159 abnormal effect Effects 0.000 description 2
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Abstract
The application provides an output circuit board which is coupled with a main circuit board and a load, wherein the main circuit board provides signals with two different levels to the output circuit board based on logic of a control command, and the output circuit board comprises a connecting end, a first switch and a second switch. The connecting end comprises a power input end and a power output end, wherein the power input end receives input power, and the power output end is coupled with the load. The first switch is coupled to the main circuit board and the power input terminal, is turned on based on a first level signal provided by the main circuit board, and is turned off based on a second level signal provided by the main circuit board. The second switch is coupled to the main circuit board, the power output end and the first switch, is turned off based on the first level signal, and is turned on based on the second level signal. When the first switch and the second switch are both conducted, the input power is provided to the load through the power output end.
Description
Technical Field
The present disclosure relates to an output circuit board, and more particularly, to an output circuit board for an industrial control system.
Background
In the current industry, the operation of the circuit control matching machine gradually replaces the manpower. As a result, there is an increasing demand for automation control, and the system security and reliability derived therefrom must also meet relevant regulations. However, in the prior art, the control failure is still easy to occur, and the reason is often that the control line is damaged or the signal transmission is problematic due to the interference of the control signal, so that the industrial accident occurs. Further, please refer to fig. 1, which is a circuit diagram of a conventional output circuit board. The output circuit board 100A is coupled to the main circuit board 200 and the load 300, and the output circuit board 100A includes a power supply path Ls formed by the single switch 2. The main circuit board 200 provides a single control signal Sc to turn on the power supply path Ls, so that the input power Vin can be provided to the load 300 through the power supply path Ls.
In the circuit architecture of fig. 1, since the main circuit board 200 only provides the single control signal Sc to turn on the power supply path Ls formed by the single switch 2. Therefore, if the control signal Sc is disturbed by noise and the switch 2 is turned on by mistake, the input power Vin will be supplied to the load 300 by mistake. Therefore, when the load 300 is, for example, but not limited to, a shredder, the load 300 may operate due to the erroneous reception of the input power Vin, which may cause an irreparable situation. On the other hand, since the main circuit board 200 provides the single control signal Sc, the output circuit board 100A does not confirm whether the control signal Sc is interfered by noise or is a real signal.
Therefore, how to design an output circuit board to solve the above-mentioned problems and meet the related specifications is a big issue to be studied in the present application.
Disclosure of Invention
In order to solve the above-mentioned problems, the present application provides an output circuit board to overcome the problems of the prior art.
Therefore, the output circuit board is coupled with the main circuit board and the load, the main circuit board provides signals with two different levels to the output circuit board based on the logic of the control command, and the output circuit board comprises a connecting end, a first switch and a second switch. The connecting end comprises a power input end and a power output end, wherein the power input end receives input power, and the power output end is coupled with the load. The first switch is coupled to the main circuit board and the power input terminal, is turned on based on a first level signal provided by the main circuit board, and is turned off based on a second level signal provided by the main circuit board. The second switch is coupled to the main circuit board, the power output end and the first switch, is turned off based on the first level signal, and is turned on based on the second level signal. When the first switch and the second switch are both conducted, the input power is provided to the load through the power output end.
In one embodiment, the output circuit board further includes a first power monitoring circuit. The first power monitoring circuit is coupled to the power input end and monitors a first power parameter of the input power. The first power supply monitoring circuit provides an input power supply to the first switch based on the first power supply parameter being normal.
In one embodiment, the output circuit further includes an isolation circuit. The isolation circuit is coupled to the first power monitoring circuit and the main circuit board. The first power supply monitoring circuit provides a notification signal to notify the main circuit board through the isolation circuit based on the abnormality of the first power supply parameter.
In one embodiment, the output circuit further includes a first isolation circuit. The first isolation circuit is coupled to the first switch and the main circuit board and electrically isolates a control end of the first switch from the main circuit board. The first isolation circuit drives the first switch to be turned on based on the first level signal and drives the first switch to be turned off based on the second level signal.
In one embodiment, the output circuit further includes a first filter circuit. The first filter circuit is coupled to the first isolation circuit and the main circuit board and filters the first level signal and the second level signal.
In one embodiment, the output circuit board further includes a second isolation circuit. The second isolation circuit is coupled to the second switch and the main circuit board and electrically isolates the control end of the second switch from the main circuit board. The second isolation circuit drives the second switch to be turned off based on the first level signal, and drives the second switch to be turned on based on the second level signal.
In one embodiment, the output circuit board further includes a second filter circuit. The second filter circuit is coupled to the second isolation circuit and the main circuit board and filters the second level signal and the first level signal.
In one embodiment, the output circuit board further includes a second power monitoring circuit. The second power monitoring circuit is coupled to the second switch, the power output end and the main circuit board and monitors a second power parameter of the input power to provide the second power parameter to the main circuit board.
In an embodiment, the output circuit board further includes a third isolation circuit. The third isolation circuit is coupled to the main circuit board and the second power monitoring circuit and electrically isolates the main circuit board from the second power monitoring circuit.
In one embodiment, when the first switch or the second switch is turned off, the power input terminal and the power output terminal are disconnected.
The main purpose and effect of the present application is that the main circuit board provides two signals with different levels to the output circuit board based on the logic of the control command, so that the output circuit board conducts the path between the input power source and the load based on the signals with two different levels, and the input power source is provided to the load to supply power to the load. Therefore, the output circuit can ensure the accuracy of the control command issued by the main circuit board, avoid the situation that the input power is supplied to the load by mistake due to the error in signal transmission, and further improve the reliability of the system.
For a further understanding of the technology, means, and efficacy of the present application, reference should be made to the following detailed description of the application and to the accompanying drawings, which are included to provide a further understanding of the utility model, and to the specific features and aspects of the application, however, reference should be made to the appended drawings and descriptive matter only and not to the limitation of the application.
Drawings
FIG. 1 is a circuit diagram of a conventional output circuit board;
FIG. 2 is a circuit configuration diagram of an output circuit board of the present application; and
Fig. 3 is an internal circuit configuration diagram of the output circuit board of the present application.
Wherein, the reference numerals:
100. 100A-output circuit board
1-connecting terminal
12-Power input terminal
14-power supply output terminal
2-switch
2A-first switch
24A-first isolation circuit
26A-first filter circuit
2B-second switch
24B-second isolation circuit
26B-second filter circuit
4-first power supply monitoring circuit
42-isolation circuit
6-second power supply monitoring circuit
62-third isolation circuit
200-main circuit board
200A-control system
200B-control module
300-load
Ls-supply path
Sc-control signal
Sh-first level signal
Sl-second level signal
Sn 1-first notification signal
Sn 2-second notification signal
Vin-input power supply
Cc control command
Pp 1-first Power supply parameter
Pp 2-second power supply parameter.
Detailed Description
In the description, numerous specific details are provided to provide a thorough understanding of particular embodiments of the present application; however, it will be apparent to one skilled in the art that the present application may be practiced without one or more of these specific details; in other instances, well-known details are not shown or described in order to avoid obscuring the essential features of the present application. The technical content and detailed description related to the present application are described below with reference to the drawings:
please refer to fig. 2, which is a circuit configuration diagram of the output circuit board of the present application, and is matched with fig. 1. The output circuit board 100 is coupled to the main circuit board 200 and the load 300, and the main circuit board 200 is mainly used for controlling the control system 200A. The output circuit board 100 is mainly used for I/O operation of an industrial control system, and is mainly used for detecting an external power source (i.e., an input power source Vin) and determining whether to provide the input power source Vin to the load 300. Specifically, the controller, processor or control circuit (hereinafter referred to as control module 200B) of the main circuit board 200 provides two signals with different levels to the output circuit board 100 based on the logic of the control command Cc, so that the output circuit board 100 conducts the path between the input power Vin and the load 300 based on the two signals with different levels to provide the input power Vin to the load 300 to supply power to the load 300. Therefore, when the control module 200B erroneously provides two signals at the same level or the signals are severely disturbed by noise, even if the output circuit board 100 fails, the path between the input power Vin and the load 300 is broken, so that the input power Vin cannot be provided to the load 300.
In particular, since the I/O operation of an industrial control system has to comply with the international standard of IEC61508 (functional safety of electrical/electronic/programmable electronic safety related systems), the core of the standard is the concept of risk and safety functions. Therefore, through the operation of the output circuit board 100, the accuracy of the control command Cc issued by the control module 200B can be ensured, and the situation that the input power Vin is provided to the load 300 by mistake due to the error in signal transmission can be avoided, thereby improving the reliability of the system. The input power Vin may be, for example, but not limited to, a dc power of 20.4V-28.8V, but the voltage value is not limited thereto.
Further, the output circuit board 100 includes a connection terminal 1, a first switch 2A, and a second switch 2B. The connection terminal 1 includes a power input terminal 12 and a power output terminal 14, the power input terminal 12 receives an input power Vin, and the power output terminal 14 is coupled to the load 300. The main circuit board 200 may provide a first level signal Sh (e.g., without limitation, a high level) or a second level signal Sl (e.g., without limitation, a low level) to the output circuit board 100 based on the logic (0 or 1) of the control command Cc. The first switch 2A is coupled to the main circuit board 200 and the power input 12, and the second switch 2B is coupled to the main circuit board 200, the power output 14 and the first switch 2A. The first switch 2A is turned on based on the first level signal Sh provided by the main circuit board 200, and turned off based on the second level signal Sl provided by the main circuit board 200.
On the contrary, the second switch 2B is turned off based on the first level signal Sh provided by the main circuit board 200, and turned on based on the second level signal Sl provided by the main circuit board 200. Therefore, when both the first switch 2A and the second switch 2B are turned on, the output circuit board 100 generates a path from the power input terminal 12 to the power output terminal 14, so that the input power Vin is transmitted to the power output terminal 14 through the path, and the input power Vin is provided to the load 300 through the power output terminal 14. Conversely, when one or both of the first switch 2A and the second switch 2B are turned off, the path between the power input terminal 12 and the power output terminal 14 is turned off, so that the path is broken, and the input power Vin cannot be transmitted to the power output terminal 14 through the path. Therefore, the first switch 2A and the second switch 2B use reverse designs (such as but not limited to N-MOS transistors and P-MOS transistors) to enable the two switches to receive signals at two different levels and to be turned on simultaneously. It should be noted that, in one embodiment, the output circuit board 100 and the main circuit board 200 may be disposed on the same circuit board, or may be disposed separately on different circuit boards, which may be selectively disposed according to practical requirements.
Please refer to fig. 3, which is a diagram of an internal circuit structure of the output circuit board of the present application, and is matched with fig. 2. The output circuit board 100 may further include a first power monitor circuit 4, and the first power monitor circuit 4 is coupled to the power input terminal 12. The first power monitoring circuit 4 is mainly configured to monitor a first power parameter Pp1 (i.e. a voltage, a current, etc.) of the input power Vin, and when the first power parameter Pp1 indicates that the input power Vin has a fault condition such as, but not limited to, an overvoltage, an undervoltage, an overcurrent, etc., the first power monitoring circuit 4 cuts off the input power Vin to prevent the fault input power Vin from affecting the device (such as, but not limited to, the first switch 2A) at the back end. Conversely, when the first power monitoring circuit 4 determines that the input power Vin is normal through the first power parameter Pp1, the input power Vin may be provided to the first switch 2A through the first power monitoring circuit 4, so that the input power Vin may be provided to the power output terminal 14 when the first switch 2A and the second switch 2B are turned on. It should be noted that, in an embodiment, the first power monitoring circuit 4 may include a plurality of sensors for measuring signals such as voltage and current of the input power Vin to generate the first power parameter Pp1, and then the measured values may be processed by using a chip such as a controller.
In another aspect, the first power monitoring circuit 4 may be coupled to the main circuit board 200 by, for example and without limitation, the isolation circuit 42, and the isolation circuit 42 is configured to electrically isolate the first power monitoring circuit 4 from the main circuit board 200. When the first power parameter Pp1 is abnormal or the input power Vin is cut off, the first power monitoring circuit 4 provides the first notification signal Sn1 to the control module 200B of the main circuit board 200 through the isolation circuit 42 to notify the control module 200B of the failure of the input power Vin or the cut-off of the input power Vin. The isolation circuit 42 may be, for example and without limitation, a circuit such as an optocoupler that electrically isolates the input terminal from the output terminal to protect the control module 200B.
With further reference to fig. 3, the output circuit board 100 may further include a first isolation circuit 24A. The first isolation circuit 24A is coupled to the first switch 2A and the main circuit board 200, and the first isolation circuit 24A is configured to electrically isolate the control terminal of the first switch 2A from the main circuit board 200. The second switch 2B may further include a second isolation circuit 24B. Similarly, the second isolation circuit 24B is coupled to the second switch 2B and the main circuit board 200, and the second isolation circuit 24B is configured to electrically isolate the control terminal of the second switch 2B from the main circuit board 200. When the main circuit board 200 provides the first level signal Sh to the first isolation circuit 24A based on the control command Cc, the first isolation circuit 24A drives the first switch 2A to be turned on based on the first level signal Sh. On the contrary, when the main circuit board 200 provides the second level signal Sl to the first isolation circuit 24A based on the control command Cc, the first isolation circuit 24A drives the first switch 2A to turn off based on the second level signal Sl. On the other hand, when the main circuit board 200 provides the first level signal Sh to the second isolation circuit 24B based on the control command Cc, the second isolation circuit 24B drives the second switch 2B to turn off based on the first level signal Sh. On the contrary, when the main circuit board 200 provides the second level signal Sl to the second isolation circuit 24B based on the control command Cc, the second isolation circuit 24B drives the second switch 2B to be turned on based on the second level signal Sl.
In another aspect, the output circuit board 100 may further include a first filter circuit 26A and a second filter circuit 26B. The first filter circuit 26A is coupled to the first isolation circuit 24A and the main circuit board 200, and the first filter circuit 26A filters the first level signal Sh or the second level signal Sl provided by the control module 200B. The second filter circuit 26B is coupled to the second isolation circuit 24B and the main circuit board 200, and the second filter circuit 26B filters the first level signal Sh and the second level signal Sl provided by the control module 200B. It should be noted that, in an embodiment, when the control module 200B of the main circuit board 200 can provide a signal with better quality (i.e. not significantly affected by noise), the output circuit board 100 may not need the first filter circuit 26A and the second filter circuit 26B, which may be adaptively configured according to practical requirements.
With further reference to fig. 3, the output circuit board 100 may further include a second power monitoring circuit 6. The second power monitoring circuit 6 is coupled to the second switch 2B, the power output terminal 14 and the main circuit board 200, and the second power monitoring circuit 6 monitors a second power parameter Pp2 (i.e. parameters such as voltage and current) of the input power Vin transmitted from the second switch 2B to the power output terminal 14, so as to provide the second power parameter Pp2 to the main circuit board 200, so that the control module 200B can determine whether the output circuit board 100 is faulty or not according to the second power parameter Pp 2. Specifically, the control module 200B may test the output circuit board 100 when the load 300 is uncoupled. When the control module 200B is to test the output circuit board 100, the control module 200B provides two signals with the same level to the output circuit board 100 (e.g., but not limited to, two first level signals Sh or two second level signals Sl). When both the first switch 2A and the second switch 2B are normal, one of them is supposed to be turned on and the other is supposed to be turned off, so that the input power Vin cannot be transmitted from the second switch 2B to the power output terminal 14.
Therefore, if the control module 200B determines that the power output terminal 14 has the input power Vin according to the second power parameter Pp2 at this time, it represents that one of the switches 2A and 2B is faulty (typically, the switch receiving the second level signal Sl). Therefore, the control module 200B can provide the signal level to the first switch 2A and the second switch 2B through the alternate change, and can know which switch 2A, 2B of the output circuit board 100 fails through the second power parameter Pp 2. The specific flow is simple control logic and will not be described in detail herein. In addition, in the normal power mode, the control module 200B may determine whether the output circuit board 100 is faulty through the second power parameter Pp 2. In another aspect, the output circuit board 100 further includes a third isolation circuit 8. The third isolation circuit 8 is coupled to the main circuit board 200 and the second power monitoring circuit 6, and the third isolation circuit 8 is used for electrically isolating the second power monitoring circuit 6 from the main circuit board 200. When the second power parameter Pp2 is abnormal, the second power monitoring circuit 6 provides the second notification signal Sn2 to the control module 200B of the main circuit board 200 through the third isolation circuit 8 to notify the control module 200B of the failure condition of the input power Vin.
However, the above description is only of the preferred embodiments of the present application, and the scope of the application should not be limited to the embodiments, i.e. the patent coverage of this application should be protected by the equivalents and modifications. The present application is capable of other various embodiments and its several details are capable of modification in accordance with the present application, as will be apparent to those of ordinary skill in the art without departing from the spirit and scope of the present application.
Claims (10)
1. An output circuit board coupled to a main circuit board and a load, wherein the main circuit board provides signals of two different levels to the output circuit board based on logic of a control command, and the output circuit board comprises:
the connecting end comprises a power input end and a power output end, wherein the power input end receives an input power supply, and the power output end is coupled with the load;
the first switch is coupled with the main circuit board and the power input end, is turned on based on a first level signal provided by the main circuit board, and is turned off based on a second level signal provided by the main circuit board; and
The second switch is coupled with the main circuit board, the power output end and the first switch, is turned off based on the first level signal and is turned on based on the second level signal;
when the first switch and the second switch are both conducted, the input power is provided to the load through the power output end.
2. The output circuit board of claim 1, further comprising:
the first power supply monitoring circuit is coupled with the power supply input end and monitors a first power supply parameter of the input power supply;
wherein the first power supply monitoring circuit provides the input power to the first switch based on the first power supply parameter being normal.
3. The output circuit board of claim 2, further comprising:
the isolation circuit is coupled with the first power supply monitoring circuit and the main circuit board;
the first power supply monitoring circuit provides a notification signal to notify the main circuit board through the isolation circuit based on the first power supply parameter abnormality.
4. The output circuit board of claim 1, further comprising:
the first isolation circuit is coupled with the first switch and the main circuit board and electrically isolates the control end of the first switch from the main circuit board;
the first isolation circuit drives the first switch to be turned on based on the first level signal and drives the first switch to be turned off based on the second level signal.
5. The output circuit board of claim 4, further comprising:
the first filter circuit is coupled to the first isolation circuit and the main circuit board and filters the first level signal and the second level signal.
6. The output circuit board of claim 1, further comprising:
the second isolation circuit is coupled with the second switch and the main circuit board and electrically isolates the control end of the second switch from the main circuit board;
the second isolation circuit drives the second switch to be turned off based on the first level signal and drives the second switch to be turned on based on the second level signal.
7. The output circuit board of claim 6, further comprising:
and the second filter circuit is coupled with the second isolation circuit and the main circuit board and filters the second level signal and the first level signal.
8. The output circuit board of claim 1, further comprising:
and the second power supply monitoring circuit is coupled with the second switch, the power supply output end and the main circuit board and monitors a second power supply parameter of the input power supply so as to provide the second power supply parameter to the main circuit board.
9. The output circuit board of claim 8, further comprising:
and the third isolation circuit is coupled with the main circuit board and the second power supply monitoring circuit and electrically isolates the main circuit board from the second power supply monitoring circuit.
10. The output circuit board of claim 1, wherein the power input is disconnected from the power output when the first switch or the second switch is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322220095.5U CN220399816U (en) | 2023-08-17 | 2023-08-17 | Output circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322220095.5U CN220399816U (en) | 2023-08-17 | 2023-08-17 | Output circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220399816U true CN220399816U (en) | 2024-01-26 |
Family
ID=89613684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322220095.5U Active CN220399816U (en) | 2023-08-17 | 2023-08-17 | Output circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220399816U (en) |
-
2023
- 2023-08-17 CN CN202322220095.5U patent/CN220399816U/en active Active
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