CN215526452U - Interface device for testing analog quantity module of distributed control system - Google Patents
Interface device for testing analog quantity module of distributed control system Download PDFInfo
- Publication number
- CN215526452U CN215526452U CN202121957378.2U CN202121957378U CN215526452U CN 215526452 U CN215526452 U CN 215526452U CN 202121957378 U CN202121957378 U CN 202121957378U CN 215526452 U CN215526452 U CN 215526452U
- Authority
- CN
- China
- Prior art keywords
- interface
- analog quantity
- channel
- testing
- quantity module
- 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.)
- Active
Links
Images
Landscapes
- Tests Of Electronic Circuits (AREA)
Abstract
The present invention relates to the field of electronic circuits. The utility model provides an interface device for testing an analog quantity module of a distributed control system. The interface device includes: a first interface (12) configured to be connected to a testing device (20) for testing of an analog quantity module (30); a second interface (11) configured to be connected to a plurality of channels (31) of the analog quantity module (30) and to the first interface (12) to simultaneously connect at least one channel (31) of the plurality of channels (31) to the testing device (20) via the first interface (12) to test the at least one channel (31). The interface device for testing the analog quantity module of the distributed control system can simultaneously connect one or more than two channels of the analog quantity module to the testing device, thereby realizing the simultaneous testing of one or more than two channels and improving the testing efficiency.
Description
Technical Field
The present invention relates to the field of electronic circuits, and in particular, to an interface device for testing an analog module of a distributed control system.
Background
Distributed Control Systems (DCS) are of increasing interest due to their flexibility and reliability of Control. In order to ensure the reliability of the distributed control system, the individual modules of the distributed control system need to be tested.
For example, it is necessary to test an analog quantity module (e.g., an analog quantity input module, an analog quantity output module) which is an important component of the distributed control system.
Generally, when testing an analog quantity module, it is necessary to individually connect each channel of the analog quantity module to a corresponding external device, and then input a test signal to a channel of the analog quantity module (e.g., an analog quantity input module) by the corresponding external device to obtain a value generated by the channel, or receive a signal to be tested from a channel of the analog quantity module (e.g., an analog quantity output module) to read the signal to be tested, so as to complete the test of the analog quantity module.
However, the analog module usually includes a large number of channels to be tested, so the testing efficiency of this testing method is low.
Therefore, a solution capable of improving the test efficiency of the analog quantity module is required.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to an interface device for testing an analog module of a distributed control system, which solves at least some of the problems of the prior art.
According to the utility model, there is provided an interface device for testing an analog module of a distributed control system, the interface device comprising: a first interface configured to be connected to a test apparatus for testing of an analog quantity module; and a second interface configured to be connected to the plurality of channels of the analog quantity module and to the first interface to simultaneously connect at least one of the plurality of channels to the test apparatus via the first interface to test the at least one channel, wherein the first interface and the second interface are used to transmit a signal generated by the at least one channel of the analog quantity module to the test apparatus or to transmit a signal generated by the test apparatus to the at least one channel of the analog quantity module to test the at least one channel by the transmitted signal.
Optionally, the first interface comprises at least one set of connection terminals, each set of connection terminals comprising a positive connection terminal and a negative connection terminal, each positive connection terminal configured to be connected to the positive connection terminal of the test apparatus and each negative connection terminal configured to be connected to the negative connection terminal of the test apparatus.
Optionally, the first interface comprises a set of connection terminals, wherein the positive channel terminal of each of the at least one channel is connected to the positive connection terminal of the set of connection terminals via the second interface, and the negative channel terminal of each of the at least one channel is connected to the negative connection terminal of the set of connection terminals via the second interface.
Optionally, the first interface includes a plurality of sets of connection terminals, wherein the number of sets of the plurality of sets of connection terminals is the same as the number of the plurality of channels, each set of connection terminals corresponds to one of the plurality of channels, and different sets of connection terminals correspond to different channels, wherein a positive channel terminal of each of the at least one channel is connected to a positive connection terminal of the corresponding set of connection terminals via the second interface, and a negative channel terminal of each of the at least one channel is connected to a negative connection terminal of the corresponding set of connection terminals via the second interface.
Optionally, the analog quantity module is an analog quantity input module, the testing device is an analog signal generator, the analog signal generator is configured to generate a test signal for testing the analog quantity module, and the first interface and the second interface are configured to transmit the test signal to the at least one channel in the analog quantity module.
Optionally, the analog quantity module is an analog quantity output module, the testing device is a multimeter, wherein the at least one channel in the analog quantity module is used for generating a channel signal to be tested for testing the channel, and the first interface and the second interface are used for transmitting the channel signal to be tested to the multimeter.
The interface device for testing the analog quantity module of the distributed control system can simultaneously connect one or more than two channels of the analog quantity module to the testing device, thereby realizing the simultaneous testing of one or more than two channels and improving the testing efficiency.
Drawings
The principles, features and advantages of the present invention may be better understood by describing the utility model in more detail below with reference to the accompanying drawings. The drawings comprise:
FIG. 1 shows a schematic block diagram of an interface arrangement for testing of an analog quantity module of a distributed control system according to an exemplary embodiment of the present invention;
FIG. 2 shows a schematic diagram of an interface apparatus for testing of an analog quantity module of a distributed control system according to an exemplary embodiment of the present invention; and
fig. 3 shows a schematic diagram of an interface device for testing an analog quantity module of a distributed control system according to another exemplary embodiment of the utility model.
Description of reference numerals:
10: an interface device; 20: a testing device; 30: an analog quantity module; 12: a first interface; 11: second interface, 31: a channel; 121. 123: a positive connection terminal; 122. 124: a negative connection terminal; 100: a switching element; 110: a sub-interface; 130: a switch control unit; 1111: a first positive terminal; 1112: a first negative terminal; 111: a second positive terminal; 112: a second negative terminal.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. In the drawings, the same or equivalent elements or components are denoted by the same reference numerals. It should be understood that the specific embodiments described herein are only for illustrating the technical idea of the present invention, and are not intended to limit the scope of the present invention.
It is to be understood that, herein, the expressions "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance, nor are they to be construed as implicitly indicating the number of technical features indicated. A feature defined as "first" or "second" may be explicitly or implicitly indicated as including at least one of the feature.
As used herein, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Fig. 1 shows a schematic block diagram of an interface arrangement for testing of an analog quantity module of a distributed control system according to an exemplary embodiment of the present invention.
Fig. 1 shows a connection relationship between an interface device 10 according to the present invention and a test device 20 and an analog quantity module 30.
As shown in fig. 1, the interface device 10 according to the present invention may be connected to an analog quantity module 30 of a distributed control system to be tested and a test device 20 for testing of the analog quantity module 30, respectively.
The Distributed Control System (DCS) may be, for example, ET200_ SPHA or the like.
As an example, the analog module to be tested 30 may be an analog input module or an analog output module.
For example, the analog input module may be configured to receive any analog signal (e.g., a temperature signal, a humidity signal, etc. detected by a sensor or other detection device) and may convert the received analog signal into a digital signal (e.g., a temperature value, a humidity value, etc. corresponding to the detected temperature signal, humidity signal, etc., respectively).
For example, the analog output module may be configured to receive any digital signal (e.g., an expected temperature value, a humidity value, etc.) and may convert the received digital signal into an analog signal (e.g., a temperature control signal, etc. for implementing the expected temperature value, humidity value, etc.).
The interface device 10 according to the utility model comprises a first interface 12 and a second interface 11.
The first interface 12 is configured as a test device 20 to which it is connected.
The second interface 11 is configured to be connected to a plurality of channels 31 of the analog quantity module 30 and to the first interface 12 to simultaneously connect at least one channel 31 of the plurality of channels 31 to the testing device 20 via the first interface 12 to test the at least one channel 31.
Here, the plurality of channels 31 of the analog quantity module 30 represent channels for multiplexing signals. For example, each channel 31 may be configured to transmit the same or different signals.
To facilitate an integral connection between the interface device 10 and the analog quantity module 30 and/or the testing device 20, in an embodiment, the second interface 11 of the interface device 10 may be configured for pluggable connection with the plurality of channels 31 of the analog quantity module 30 and/or the testing device 20.
In one embodiment, the testing device 20 may be an analog signal generator in case the analog quantity module 30 to be tested is an analog quantity input module. The analog signal generator may be used to generate a test signal for testing of the analog quantity module 30. At this point, the first interface 12 and the second interface 11 of the interface device 10 are available for transmitting said test signal to at least one channel 31 in the analog quantity module 30.
For example, the analog signal generator may generate an analog current (e.g., a current of 4 to 20 ma) as a test signal, the generated current may be transmitted to at least one channel of the analog quantity module 30 via the first interface 12 and the second interface 11 of the interface device 10, and the at least one channel 31 may respectively generate a value corresponding to the received current to complete a test of the at least one channel of the analog quantity input module by comparing the generated value with a predetermined reference value.
In another embodiment, in the case that the analog quantity module 30 to be tested is an analog quantity output module, the testing device 20 may be a multimeter. At this time, at least one channel 31 in the analog quantity module 30 may be used to generate a channel-under-test signal for testing of the channel, and the first interface 12 and the second interface 11 may be used to transmit the channel-under-test signal to the multimeter.
For example, at least one channel to be tested of the analog quantity output module may generate a corresponding channel signal to be tested (e.g., the channel signal to be tested is generated according to an analog signal received from other equipment), and the first interface 12 and the second interface 11 may be used to transmit the channel signal to be tested to corresponding terminals of the multimeter for reading, so as to complete the testing of the at least one channel of the analog quantity output module according to the comparison of the read value and a corresponding reference value.
Through the mode, one or more than two channels in the analog quantity module can be simultaneously tested through the single connection between the interface device and the analog quantity module to be tested.
Fig. 2 shows a schematic diagram of an interface device 10 for testing of an analog module of a distributed control system according to an exemplary embodiment of the present invention.
To achieve accurate connection of the first interface 12 of the interface apparatus 10 of fig. 1 with the testing apparatus 20, in one embodiment, the first interface 12 may include at least one set of connection terminals, each set of connection terminals may include one positive connection terminal 121 and one negative connection terminal 122, each positive connection terminal 121 is configured to be connected to a positive connection terminal of the testing apparatus 20, and each negative connection terminal 122 is configured to be connected to a negative connection terminal of the testing apparatus 20.
For example, in the case where the analog quantity module 30 to be tested is an analog quantity input module and the test device 20 is an analog signal generator, the positive connection terminal of the test device 20 may represent a positive output terminal of the signal generator, and the negative connection terminal of the test device 20 may represent a negative output terminal of the signal generator.
For example, in the case where the analog module 30 to be tested is an analog output module and the testing apparatus 20 is a multimeter, the positive connection terminal of the testing apparatus 20 may represent a positive connection terminal of the multimeter, and the negative connection terminal of the testing apparatus 20 may represent a negative connection terminal of the multimeter.
Fig. 2 shows an example in which the first interface 12 includes a set of connection terminals (i.e., one positive connection terminal 121 and one negative connection terminal 122).
Furthermore, to implement the connection of the second interface 11 of the interface device 10 of fig. 1 to the plurality of channels of the analog quantity module 30 and the connection of the second interface 11 to the first interface, in one embodiment, the second interface 11 of the interface device 10 may include a plurality of sub-interfaces 110.
For example, each sub-interface 110 of the plurality of sub-interfaces 110 may be configured to connect to one channel of the analog quantity module 30, and a different sub-interface 110 of the plurality of sub-interfaces 110 is configured to connect to a different channel of the analog quantity module 30.
Furthermore, the plurality of sub-interfaces 110 may also be configured to be connected to the same set of connection terminals of the first interface 12; alternatively, each sub-interface 110 of the plurality of sub-interfaces 110 may be configured to be connected to a different set of connection terminals of the at least one set of connection terminals of the first interface 12.
In one embodiment, each sub-interface 110 may include a first set of connection terminals to enable connection with the corresponding channel 31, and each sub-interface 110 may further include a second set of connection terminals to enable connection with the first interface 12.
In one embodiment, each first connection terminal set may include a first positive terminal 1111 and a first negative terminal 1112. Each first positive terminal 1111 may be configured to be connected to a positive channel terminal of a corresponding channel of the analog quantity module 30, and each first negative terminal 1112 may be configured to be connected to a negative channel terminal of a corresponding channel of the analog quantity module 30.
Each second connection terminal set may include a second positive terminal 111 and a second negative terminal 112. Each second positive terminal 111 may be configured to be connected to a positive connection terminal 121 of a corresponding set of connection terminals of the first interface 12, and each second negative terminal 112 is configured to be connected to a negative connection terminal 122 of a corresponding set of connection terminals of the first interface 12.
In one example, in case the first interface 12 comprises only one set of connection terminals (one positive connection terminal 121 and one attachment link terminal 122) as shown in fig. 2, all the second positive terminals 111 of the second interface 11 may be connected to the positive connection terminal 121 of the set of connection terminals of the first interface 12, and all the second negative terminals 112 of the second interface 11 may be connected to the negative connection terminal 122 of the set of connection terminals of the first interface 12.
In another example, where the first interface 12 includes multiple sets of connection terminals, for any sub-interface 110, the second positive terminal 111 of the sub-interface 110 may be connected to the positive connection terminal 121 of the corresponding set of connection terminals of the first interface 12 configured to be connected corresponding to that sub-interface, and the second negative terminal 112 of the sub-interface 110 may be connected to the negative connection terminal 122 of the corresponding set of connection terminals of the first interface 12 configured to be connected corresponding to that sub-interface 110.
Here, in order to enable accurate testing of all channels 31 of the analog quantity module 30 through a single connection of the interface device 10 with the analog quantity module 30 to be tested, in one embodiment, the second interface 11 may include the same number of sub-interfaces 110 as the number of channels 31 of the analog quantity module 30. Accordingly, the first interface 12 may include a plurality of sets of connection terminals having the same number of sets as the number of the plurality of channels, each set of connection terminals corresponding to one channel (one sub-interface 110) of the plurality of channels 31, and different sets of connection terminals corresponding to different channels 31 (different sub-interfaces 110).
For example, in the case where the analog quantity module 30 includes 16 channels, the second interface 11 may include 16 sub-interfaces.
It should be understood that the number of channels of the analog quantity module, the number of sub-interfaces of the second interface, and the number of sub-interfaces shown in fig. 2 shown in the above examples are only examples, and the channels and the sub-interfaces, which are the same as or different from the above examples and the number shown in fig. 2, may be provided according to actual needs.
In the case where a plurality of sub-interfaces 110 are simultaneously connected to the same set of connection terminals of the first interface 12 as shown in fig. 2, the connection between the first interface 12 and the second interface 11 and the test apparatus 20 can be easily realized by only two terminals (the positive connection terminal 121, the negative connection terminal 122) of the first interface 12, thereby enabling the interface apparatus 10 to be realized in a compact and small size.
In addition, when the plurality of sub-interfaces are respectively connected to different groups of connection terminals of the first interface, different connection paths with the test device can be independently allocated to each channel of the analog quantity module, so that the performance test can be more specifically performed.
Furthermore, in order to enable the interface device 10 to switch the connection of the different channels to be tested of the analog quantity module 30 with the testing device 20, in one embodiment, the interface device 10 according to the present invention may further include a switching element 100 connected between each sub-interface 110 in the second interface 11 and the first interface 12.
For example, as shown in fig. 2, for each of the terminal interfaces 110, a switching element 100 may be disposed between the second positive terminal 111 of the terminal interface 110 and the positive connection terminal 121 of the first interface 12, and/or a switching element 100 may be disposed between the second negative terminal 112 of the terminal interface 110 and the negative connection terminal 122 of the first interface 12.
Each switching element 100 is switchable between an on state and an off state to connect or disconnect a corresponding sub-interface 110 of the second interface 11 to the first interface 12, thereby connecting or disconnecting the corresponding channel of the analog quantity module 30 to which the sub-interface 110 is connected to the testing apparatus 20.
Through the above manner, individual control of each branch in the interface device 10 can be realized, thereby realizing independent control of different channels of the analog quantity module.
To achieve this control, in one embodiment, the interface device 10 may further include a switch control unit 130, as shown in fig. 2. The switch control unit 130 may be connected to each switching element 100 and configured to control on and off of each switching element 100 to connect or disconnect the corresponding sub-interface 110 in the second interface 11 with or from the first interface 12.
For example, the switch control unit 130 may simultaneously connect or disconnect all switching elements 100 (e.g., two switching elements) on the same branch of the interface device 10, i.e., the branch connected to the single sub-interface 110, so as to connect or disconnect the corresponding channels of the analog quantity module 30 to or from the test device 20 via the single sub-interface 110, the switching elements 100, the first interface 12.
In this way, the interface device 10 can be connected to the analog module 30 at a single time, so that the testing device 20 can be connected to different channels of the analog module 30 at the same time, and the different channels can be tested at the same time.
Fig. 3 shows a schematic illustration of an interface device 10 for an analog module of a distributed control system according to a further exemplary embodiment of the present invention.
The embodiment shown in fig. 3 differs from that of fig. 2 in that the first interface 12 comprises not only one set of positive and negative terminals but also a plurality of sets of connection terminals (e.g. a first set of connection terminals 121, 122; a second set of connection terminals 123, 124). Further, the respective sub-interfaces 110 of the second interface 11 are not connected to the same group of connection terminals of the first interface 12 in common, but are connected to different groups of connection terminals of the first interface 12, respectively, and each sub-interface 110 is connected to one group of connection terminals and different sub-interfaces 110 are connected to different groups of connection terminals. For example, the leftmost sub-interface 110 of the second interface 11 in fig. 3 is connected to a first set of connection terminals of the first interface 12 (e.g., the second positive terminal 111 is connected to the positive connection terminal 121, the second negative terminal 112 is connected to the negative connection terminal 122), the adjacent sub-interface 110 is connected to a second set of connection terminals of the first interface 12 (e.g., the second positive terminal 111 is connected to the positive connection terminal 123, the second negative terminal 112 is connected to the negative connection terminal 124), and so on.
In this way, each channel 31 of the analog quantity module 30 can be independently assigned a different connection path with the test device 20, so that the path to be tested can be determined more clearly.
Here, the connections between the different channels of the analog module and the test device can still be switched by means of switching elements 100 arranged in the branches of the interface device 10. An example in which the switching element 100 is provided only between the second negative terminal 112 of the sub-interface 110 and the positive connection terminal 122 of the first interface 12 is shown in fig. 3.
It should be understood that the interface device of fig. 3 may also include a switch control unit as shown in fig. 2, and the number of sub-interfaces included in the second interface shown in fig. 2 and 3 is only an example, and the interface device may include the same or different sub-interfaces as the number of sub-interfaces shown in fig. 2 and 3 according to actual needs, for example, the number of channels of the analog quantity module.
The interface device for testing the analog quantity module of the distributed control system can simultaneously connect one or more than two channels of the analog quantity module to the testing device, thereby realizing the simultaneous testing of one or more than two channels and improving the testing efficiency.
Although specific embodiments of the utility model have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the utility model. Various substitutions, alterations, and modifications may be devised without departing from the spirit and scope of the present invention.
Claims (6)
1. An interface device (10) for testing of an analog quantity module (30) of a distributed control system, characterized in that said interface device (10) comprises:
a first interface (12) configured to be connected to a testing device (20) for testing of an analog quantity module (30); and
a second interface (11) configured to be connected to a plurality of channels (31) of an analog quantity module (30) and to be connected to the first interface (12) for simultaneously connecting at least one channel (31) of the plurality of channels (31) to the testing device (20) via the first interface (12) for testing the at least one channel (31),
wherein the first interface (12) and the second interface (11) are used for transmitting signals generated by the at least one channel (31) of the analog quantity module (30) to the testing device (20) or for transmitting signals generated by the testing device (20) to the at least one channel (31) of the analog quantity module (30) so as to test the at least one channel (31) through the transmitted signals.
2. Interface device (10) for testing of an analog quantity module (30) of a distributed control system according to claim 1, characterized in that the first interface (12) comprises at least one set of connection terminals, each set of connection terminals comprising one positive connection terminal (121) and one negative connection terminal (122), each positive connection terminal (121) being configured to be connected to a positive connection terminal of the test device (20), each negative connection terminal (122) being configured to be connected to a negative connection terminal of the test device (20).
3. Interface device (10) for testing of an analog quantity module (30) of a distributed control system according to claim 2, characterized in that the first interface (12) comprises a set of connection terminals, wherein the positive channel terminal of each channel (31) of the at least one channel (31) is connected to the positive connection terminal of the set of connection terminals via the second interface (11) and the negative channel terminal of each channel (31) of the at least one channel (31) is connected to the negative connection terminal of the set of connection terminals via the second interface (11).
4. Interface device (10) for the testing of an analog quantity module (30) of a distributed control system according to claim 2, characterized in that the first interface (12) comprises a plurality of sets of connection terminals,
wherein the number of sets of the plurality of sets of connection terminals is the same as the number of the plurality of channels, each set of connection terminals corresponds to one of the plurality of channels, and different sets of connection terminals correspond to different channels,
wherein the positive channel terminal of each channel (31) of the at least one channel (31) is connected to the positive connection terminal of the corresponding group of connection terminals via the second interface (11), and the negative channel terminal of each channel (31) of the at least one channel (31) is connected to the negative connection terminal of the corresponding group of connection terminals via the second interface (11).
5. Interface device (10) for testing of an analog quantity module (30) of a distributed control system according to any of claims 1-4, characterized in that the analog quantity module (30) is an analog quantity input module, the test device (20) is an analog signal generator for generating a test signal for testing of the analog quantity module (30), wherein the first interface (12) and the second interface (11) are for transmitting the test signal to the at least one channel (31) in the analog quantity module (30).
6. Interface device (10) for testing of an analog quantity module (30) of a distributed control system according to any of claims 1-4, characterized in that the analog quantity module (30) is an analog quantity output module and the testing device (20) is a multimeter, wherein the at least one channel (31) in the analog quantity module (30) is used for generating a channel-under-test signal for testing of the channel, and the first interface (12) and the second interface (11) are used for transmitting the channel-under-test signal to the multimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121957378.2U CN215526452U (en) | 2021-08-19 | 2021-08-19 | Interface device for testing analog quantity module of distributed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121957378.2U CN215526452U (en) | 2021-08-19 | 2021-08-19 | Interface device for testing analog quantity module of distributed control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215526452U true CN215526452U (en) | 2022-01-14 |
Family
ID=79792105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121957378.2U Active CN215526452U (en) | 2021-08-19 | 2021-08-19 | Interface device for testing analog quantity module of distributed control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215526452U (en) |
-
2021
- 2021-08-19 CN CN202121957378.2U patent/CN215526452U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7511517B2 (en) | Semi-automatic multiplexing system for automated semiconductor wafer testing | |
| CN108923850B (en) | Parallel multi-channel optical module testing device for 40Gbs, 100Gbs and 120Gbs | |
| CN106872849B (en) | Equipment internal IO sampling method, device and system | |
| CN109167634A (en) | Optic communication device automatic adjusting and testing device, method, equipment and storage medium | |
| CN215526452U (en) | Interface device for testing analog quantity module of distributed control system | |
| KR101138200B1 (en) | Semiconductor wafer, semiconductor circuit, testing board and testing system | |
| CN108055075B (en) | Optical module temperature cycle test system and method | |
| CN218445837U (en) | Aging board and chip aging test system | |
| CN105589026A (en) | Large switch matrix testing device | |
| CN217428124U (en) | Test system of light emission receiving assembly on-board equipment | |
| CN101311740A (en) | Electronic assembly test system | |
| CN215931952U (en) | Connecting device for testing switching value output module | |
| CN115421026A (en) | Aging test method, circuit and system for batch PD chips | |
| US10884067B2 (en) | Modification of test measurement signals for protective devices for electric power networks | |
| US5821640A (en) | Electrical switching assembly | |
| CN215262317U (en) | Connecting device, checking equipment and checking system | |
| EP2388605B1 (en) | Testing a light producing element | |
| CN215528135U (en) | Wiring device | |
| RU2785919C1 (en) | Measuring system | |
| CN216132590U (en) | Connecting device | |
| CN220210450U (en) | Calibration circuit and calibration system | |
| CN210377439U (en) | Testing device | |
| CN219266399U (en) | Detection device and detection system | |
| CN219590930U (en) | Multichannel signal output device | |
| CN117675431A (en) | same-ID CAN equipment control system and method based on switch matrix |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211100 No.37 Yihuai street, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee after: Siemens Energy Automation (Nanjing) Co.,Ltd. Address before: 211100 No.37 Yihuai street, Jiangning Economic and Technological Development Zone, Nanjing, Jiangsu Province Patentee before: SIEMENS POWER PLANT AUTOMATION Ltd. |