CN216132590U - Connecting device - Google Patents
Connecting device Download PDFInfo
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- CN216132590U CN216132590U CN202121959889.8U CN202121959889U CN216132590U CN 216132590 U CN216132590 U CN 216132590U CN 202121959889 U CN202121959889 U CN 202121959889U CN 216132590 U CN216132590 U CN 216132590U
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Abstract
The present invention relates to the field of electronic circuits. The present invention provides a connection device, characterized in that the connection device is used for connecting a thermal resistance input module to be tested of a distributed control system to a thermal resistance load, the thermal resistance input module is used for generating a temperature signal according to a read resistance value of the thermal resistance load, the thermal resistance input module comprises a plurality of channels, the connection device comprises: an input interface configured to be connected to a thermal resistive load; and a test module interface configured to connect to a plurality of channels of a thermal resistance input module, the test module interface connected with the input interface such that each of the plurality of channels is connected to a thermal resistance load. In the utility model, a highly integrated signal test connection template is provided aiming at the channel characteristics of the special thermal resistance input module of the distributed control system, so that the synchronous test signal access of multiple channels can be realized, and the time overhead of batch channel test is saved.
Description
Technical Field
The present invention relates to the field of electronic circuits, and more particularly, to a connecting device.
Background
A Distributed Control System (DCS) is a computer integrated System integrating process Control and process monitoring, and is widely applied to the field of industrial automation by virtue of a flexible configuration calling mode and rich Control algorithms.
In order to ensure the reliability of the distributed system after it has been put into use, it is necessary to test the individual dedicated modules of the distributed system one by one, which includes, in particular, the testing of the hot resistance input modules. In the conventional test method, it is necessary to independently and repeatedly connect each channel of the thermal resistance input module to the resistance box, and then read the corresponding resistance value by the thermal resistance input module and generate a temperature signal. Finally, the accuracy of each channel is verified by comparing the measured temperature signal with a reference resistance score.
However, a large number of channels to be tested are often included in a thermal resistance input module, so that the conventional manual testing method consumes a large amount of repetitive work, and the repeated plugging and unplugging operations of the channels also significantly affect the service life of the signal terminals in the channels.
In this context, it is desirable to provide an improved testing scheme for thermal resistance input modules to significantly save the workload of channel testing, greatly improve efficiency and meet standard testing requirements.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to provide a connection device that solves at least some of the problems of the prior art.
According to the present invention there is provided a connection apparatus for connecting a thermal resistance input module to be tested of a distributed control system to a thermal resistance load, the thermal resistance input module for generating a temperature signal in dependence on a read resistance value of the thermal resistance load, the thermal resistance input module comprising a plurality of channels, the connection apparatus comprising:
an input interface configured to be connected to a thermal resistive load; and
a test module interface configured to connect to a plurality of channels of a thermal resistance input module, the test module interface connected with the input interface such that each of the plurality of channels is connected to a thermal resistance load.
The utility model comprises the following technical concepts: aiming at the channel characteristics of a special thermal resistance input module of a distributed control system, a highly integrated signal test connection template is provided, so that synchronous or sequential test signal access of multiple channels can be realized, and wiring disassembly operation for one channel after each measurement is not required to be repeated, so that the time overhead of batch channel test is remarkably saved, the manual wiring process is simplified, the misoperation of personnel is reduced to a certain extent, and the test precision is improved.
Optionally, the test module interface is configured to be simultaneously pluggable to multiple channels of the hot resistance input module.
The following technical advantages are achieved in particular here: the test module interface is designed to be simultaneously connected with the channels in a pluggable manner, so that a multi-jack function is provided to reduce wiring burden, the processing and the assembly are convenient, the modularity of the test interface connection is realized, and the process cost is reduced.
Optionally, the test module interface comprises a plurality of sub-interfaces, one of the plurality of sub-interfaces being configured to connect to one of the plurality of channels of the thermal resistive input module, and a different sub-interface being configured to connect to a different channel of the thermal resistive input module.
The following technical advantages are achieved in particular here: when a plurality of sub-interfaces are connected in parallel between the positive terminal and the negative terminal of the same terminal group of the input interface, multi-channel synchronous or sequential connection of the thermal resistor input module to two ends of the same thermal resistor in the thermal resistor load can be realized, so that mutual precision verification among all channels is facilitated. When multiple terminal interfaces are connected between the positive and negative terminals of different terminal sets of the input interface, respectively, then different thermal resistors in the thermal resistive load can be independently assigned to each channel of the thermal resistive input module, thereby adding to the targeted performance testing.
Optionally, the connection means comprises a first type of diverter switch connected between the sub-interface of the test module interface and the input interface.
The following technical advantages are achieved in particular here: by arranging a selector switch in the test branch with each sub-interface, the on-off of each test branch can be controlled independently, so that the independent control among different channels of the thermal resistance input module is realized.
Optionally, each of the plurality of channels of the thermal resistance input module comprises a power supply terminal and a measurement terminal, each sub-interface comprises a first type contact and a second type contact, the first type contact is configured to be connected with the power supply terminal in the channel of the thermal resistance input module so that power is supplied to the thermal resistance load by the thermal resistance input module through the power supply terminal, the second type contact is configured to be connected with the measurement terminal in the channel of the thermal resistance input module so that a resistance value of the thermal resistance load is detected by the thermal resistance input module through the measurement terminal, wherein the connecting means comprises a second type switch connected between the first type contact and the second type contact of each sub-interface.
The following technical advantages are achieved in particular here: by performing such classification of the contacts in the respective sub-interfaces, the feedback state of each terminal in the channel of the thermal resistance input module can be individually checked at the time of performing the channel test to obtain a more accurate test result. In addition, by arranging the change-over switch between the first-type contact and the second-type contact, the short circuit between different terminals in each channel can be selectively realized according to specific resistance load models, so that the whole test scheme is suitable for wider field working condition.
Optionally, the test module interface comprises the same number of sub-interfaces as the number of channels of the thermal resistance input module.
The following technical advantages are achieved in particular here: the number of the sub interfaces is designed to be consistent with the number of the channels of the thermal resistance input module, so that the test of the complete thermal resistance input module can be realized by each dismounting operation. The synchronous testing efficiency is greatly improved under the condition that a plurality of thermal resistance input modules exist in one cabinet.
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 is a schematic diagram showing the connection of a connection device according to the present invention to a hot resistive load and to a hot resistive input module;
FIG. 2 shows a block diagram of a connection device according to an exemplary embodiment of the present invention;
fig. 3 shows a block diagram of a connecting device according to another exemplary embodiment of the present invention; and
fig. 4 shows a block diagram of a connection device according to another exemplary embodiment of the present invention.
Reference numerals
10 connecting device
20 thermal resistance load
30 thermal resistance input module
11 test module interface
12 input interface
31 channel
100 first class changeover switch
200 second class changeover switch
110. 201, 202 sub-interface
111 upper interface unit
112 lower interface unit
121. 221, 222, 1211, 1212 positive terminal
122. 221', 222', 1221, 1222 negative terminal
1111. 1113 contacts of the first type
1112. 1114 contacts of a second type
130 switch control unit
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 diagram of the connection of a connection device 10 according to the present invention to a resistive heating load 20 and to a resistive heating input module 30. As shown in fig. 1, the connection device 10 comprises an input interface 12 and a test module interface 11.
The test module interface 11 is configured to connect to a plurality of channels 31 of the thermal resistance input module 30. Here, there is also an electrical connection between test module interface 11 and input interface 12, which enables each of the plurality of channels 31 to be connected to thermal resistive load 20. The thermal resistance input module 30 can be, for example, a dedicated temperature measurement module (e.g., an RTD module) of a distributed control system or a programmable logic controller, which can generate a temperature signal from the read resistance value. In fig. 1, a thermal resistance input module 30 is shown by way of example, which comprises, for example, eight channels 31. In this example, eight channels 31 are connected in parallel to the test module interface 11 by means of transmission lines, but it is also possible for the test module interface 11 to be of a universal design and, for example, to be configured to be pluggable in synchronism with the individual channels 31 of the thermal resistance input module 30. This greatly simplifies manual wiring operations and improves system reliability.
Fig. 2 shows a block diagram of a connection device 10 according to an exemplary embodiment of the present invention.
As shown in fig. 2, the input interface 12 of the connection device 10 includes a terminal set including a positive terminal 121 and a negative terminal 122 so that the input interface 12 can be connected to one end of the thermal resistive load by the positive terminal 121 and to the other end of the thermal resistive load by the negative terminal 122. The test module interface 11 of the connection device 10 comprises a plurality of sub-interfaces 110, which sub-interfaces 110 are connected in parallel between the positive terminal 121 and the negative terminal 122 of one terminal set of the input interface 12, thereby enabling the common connection of the respective channels of the hot resistive input module to both ends of the hot resistive load. In addition, a first type of selector switch 100 is provided between each sub-interface 110 and the positive terminal 121 and/or the negative terminal 122 of the input interface 12, so that the switching on and off of the test branch containing each sub-interface 110 can be controlled individually. Therefore, a plurality of channels of the same thermal resistance input module can be synchronously or sequentially connected to two ends of a thermal resistance load so as to carry out a channel test.
Here, each of the terminal interfaces 110 further includes an upper interface unit 111 and a lower interface unit 112, the upper interface unit 111 being connected to a positive terminal 121 of the input interface 12, and the lower interface unit 112 being connected to a negative terminal 122 of the input interface 12.
In order to enable each sub-interface 110 to be accurately and adaptively docked to one channel of the thermal resistance input module, two types of contacts are provided in the upper interface unit 111 and the lower interface unit 112 of each sub-interface 110, respectively, and the first type of contact 1111 is configured to be connected to a power supply terminal (e.g., power supply terminal I + or I-) of channel AI1 of the RTD analog input module of ET200_ SPHA) in the channel of the thermal resistance input module for supplying a constant current signal to the thermal resistance load through the thermal resistance input module. Accordingly, the second type of contact 1112 is configured to be connected to a measurement terminal in a channel of the thermal resistance input module (e.g., measurement terminal M + or M-) of channel AI1 of the RTD analog input module of ET200_ SPHA) for detecting a resistance value of the thermal resistance load through the thermal resistance input module.
Furthermore, the connection device 10 comprises a switch control unit 130, the switch control unit 130 being connected to the test module interface 11 and being configured to control the switching of each first type switch 100 in the test module interface 11 to switch each sub-interface 110 in the test module interface 11 on or off with the input interface 12.
Fig. 3 shows a block diagram of a connection device 10 according to another exemplary embodiment of the present invention.
The embodiment shown in fig. 3 differs from that of fig. 2 in that the input interface 12 no longer comprises only one terminal set, but a plurality of terminal sets. Furthermore, the respective terminal interfaces 201, 202 of the test module interface 11 are no longer connected in common in parallel between the positive and negative terminals of the same terminal set, but are connected to the positive and negative terminals of different terminal sets of the input interface 12, respectively. For example, the first terminal interface 201 of the test module interface 11 is connected between the positive terminal 221 and the negative terminal 221 'of the first terminal set of the input interface 12, and the second terminal interface 202 is connected between the positive terminal 222 and the negative terminal 222' of the second terminal set of the input interface 12. In this way, the channel of the resistive-heat input module connected to one sub-interface 201 can be made to form a closed loop with one resistor (not shown) in the resistive-heat load, while the other channel of the resistive-heat input module connected to the other sub-interface 202 forms a closed loop with another resistor (not shown) in the resistive-heat load. Thereby, it is possible to connect a plurality of channels of the thermal resistance input module to different thermal resistors simultaneously or sequentially, enabling a more flexible test scheme.
Fig. 4 shows a block diagram of a connection device 10 according to another exemplary embodiment of the present invention.
The embodiment shown in fig. 4 differs from that of fig. 1 in that the thermal resistive load (not shown) external to the connection device 10 is no longer a two-wire thermal resistor, but a four-wire one, meaning that one thermal resistor has four connection terminals. To enable connection with a four-wire heating resistor as well, the input interface 12 includes two positive terminals 1211, 1212 and two negative terminals 1221, 1222 in a set of positive and negative terminals. The positive first type contact 1111 and the negative first type contact 1113 of the test module interface 11 are then connected to a positive terminal 1211 and a negative terminal 1221, respectively, of the input interface 12, so that a channel of the thermal resistance input module forms a power supply loop with the thermal resistor. The positive second type contact 1112 and the negative second type contact 1114 of the test module interface 11 are connected to the other positive terminal 1212 and the other negative terminal 1222, respectively, such that one channel of the thermal resistor input module forms a measurement loop with the thermal resistor. Thus, the test of a plurality of channels of the thermal resistance input module can be performed under the condition that the four-wire system external thermal resistance is used.
It can also be seen here that a second type changeover switch 200 is also provided between the positive first-type contact 1111 and the positive second-type contact 1112 of each subinterface (and correspondingly between the negative first-type contact 1113 and the negative second-type contact 1114), which configuration has the advantage: when using a two-wire external thermal resistor, the second type of diverter switch between the positive first type of contact 1111 and the positive second type of contact 1112 may be closed (correspondingly, the second type of diverter switch between the negative first type of contact 1113 and the negative second type of contact 1114) thereby shorting the supply terminal and the measurement terminal in a single channel. When a four-wire system or a three-wire system heat resistor is used, the second type changeover switch 200 can be selectively turned off. Therefore, the connecting device 10 can be adapted to different types of thermal resistance loads in different switch on-off states, and can be adapted to various field test conditions.
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. A connection device (10), wherein the connection device (10) is used for connecting a thermal resistance input module (30) to be tested of a distributed control system to a thermal resistance load (20), the thermal resistance input module (30) is used for generating a temperature signal according to a read resistance value of the thermal resistance load (20), the thermal resistance input module (30) comprises a plurality of channels (31), the connection device (10) comprises:
an input interface (12) configured to be connected to a thermal resistive load (20); and
a test module interface (11) configured to connect to a plurality of channels (31) of a thermal resistive input module (30), the test module interface (11) being connected with the input interface (12) such that each of the plurality of channels (31) is connected to a thermal resistive load (20).
2. Connection device (10) according to claim 1, characterized in that the test module interface (11) is configured to be pluggable simultaneously with a plurality of channels (31) of the thermal resistance input module (30).
3. Connecting device (10) according to claim 1 or 2, characterized in that the test module interface (11) comprises a plurality of sub-interfaces (110), one of the plurality of sub-interfaces (110) being configured to be connected to one of the plurality of channels (31) of the hot resistive input module (30) and a different sub-interface (110) being configured to be connected to a different channel (31) of the hot resistive input module (30).
4. Connection device (10) according to claim 3, characterized in that the connection device (10) comprises a first type of changeover switch (100) connected between the sub-interface (110) of the test module interface (11) and the input interface (12).
5. Connecting device (10) according to claim 4, wherein each of the plurality of channels (31) of the thermal resistive input module comprises a supply terminal and a measurement terminal, each sub-interface (110) comprising a first type of contact (1111) and a second type of contact (1112), the first type of contact (1111) being configured to be connected to the supply terminal in the channel (31) of the thermal resistive input module (30) for supplying power to the thermal resistive load (20) through the supply terminal by the thermal resistive input module (30), the second type of contact (1112) being configured to be connected to the measurement terminal in the channel (31) of the thermal resistive input module (30) for detecting the resistance value of the thermal resistive load (20) through the measurement terminal by the thermal resistive input module (30).
6. Connection device (10) according to claim 5, characterized in that the connection device (10) comprises a second type of diverter switch (200) connected between the first type of contacts (1111) and the second type of contacts (1112) of each sub-interface (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121959889.8U CN216132590U (en) | 2021-08-19 | 2021-08-19 | Connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121959889.8U CN216132590U (en) | 2021-08-19 | 2021-08-19 | Connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216132590U true CN216132590U (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121959889.8U Active CN216132590U (en) | 2021-08-19 | 2021-08-19 | Connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216132590U (en) |
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2021
- 2021-08-19 CN CN202121959889.8U patent/CN216132590U/en active Active
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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. |