CN215528135U

CN215528135U - Wiring device

Info

Publication number: CN215528135U
Application number: CN202121960851.2U
Authority: CN
Inventors: 郁强; 李嘉成
Original assignee: Siemens Power Plant Automation Ltd
Current assignee: Siemens Energy Automation Nanjing Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-01-14
Anticipated expiration: 2031-08-19

Abstract

The present invention relates to the field of electronic circuits. The utility model provides a wiring device, which is characterized in that the wiring device is used for connecting a thermocouple input module to be tested of an industrial control system to a thermocouple signal source, the thermocouple input module is used for generating a temperature signal according to a read thermocouple signal of the thermocouple signal source, and the wiring device comprises: an input interface configured to be connected to a thermocouple signal source; and a test module interface configured to connect to the plurality of channels of the thermocouple input module, the test module interface connected with the input interface such that each of the plurality of channels is connected to a thermocouple signal source. In the utility model, a highly integrated signal test connection template is provided aiming at the channel characteristics of a special thermocouple input module of an industrial 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

Wiring device

Technical Field

The present invention relates to the field of electronic circuits, and more particularly, to a wiring 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, inter alia, the test of the thermocouple input module. In the conventional test method, it is necessary to manually connect the respective channels of the thermocouple input module to the thermocouple signal source one by one, and then read the current value of the thermocouple signal generated from the thermocouple signal source by the thermocouple input module and thereby generate a temperature signal. And finally, comparing the measured temperature signal with the reference temperature of the thermocouple signal source to realize the precision verification of each channel.

However, a thermocouple input module often includes a large number of channels to be tested, so that the conventional manual testing method represents a large labor cost and time overhead, and the service life of the signal terminals in the channels can be significantly influenced by repeated plugging and unplugging operations of the channels.

In this context, it is desirable to provide an improved thermocouple input module testing scheme 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 junction device that solves at least some of the problems of the prior art.

According to the present invention, there is provided a wiring device for connecting a thermocouple input module to be tested of an industrial control system to a thermocouple signal source, the thermocouple input module for generating a temperature signal from a thermocouple signal of the thermocouple signal source read, the wiring device comprising:

an input interface configured to be connected to a thermocouple signal source; and

a test module interface configured to connect to a plurality of channels of a thermocouple input module, the test module interface connected with the input interface such that each of the plurality of channels is connected to a thermocouple signal source, wherein the test module interface comprises a plurality of sub-interfaces, one of the plurality of sub-interfaces configured to connect to one of the plurality of channels of the thermocouple input module and a different sub-interface configured to connect to a different channel of the thermocouple input module, each of the plurality of channels of the thermocouple input module comprising a positive measurement terminal and a negative measurement terminal, each sub-interface comprising a positive contact configured to connect with a positive measurement terminal in a channel of the thermocouple input module and a negative contact configured to connect with a negative measurement terminal in a channel of the thermocouple input module, such that thermoelectric generated by the thermocouple signal source is detected by the thermocouple input module through the positive measurement terminal and the negative measurement terminal The current value of the even signal.

The utility model comprises the following technical concepts: aiming at the channel characteristics of a special thermocouple input module of an industrial control system, a highly integrated signal test connection template is provided, so that the synchronous test signal access of multiple channels can be realized, and the wiring disconnection operation for one channel after each measurement is not required, so that the time overhead of batch channel test is remarkably saved, the manual wiring flow is simplified, the misoperation of personnel is reduced to a certain extent, and the test precision is improved. Furthermore, by such division of the contacts in the respective sub-interfaces, the feedback state of each terminal in the channel of the thermocouple input block can be individually checked at the time of channel test to obtain more accurate test results.

The following technical advantages are achieved in particular here: through designing test module interface into with a plurality of passageways can connect in plug-pull ground simultaneously, not only provide many sockets function in order to alleviate the wiring burden from this, but also make things convenient for processing equipment, realized test interface connection's modularization, reduce technology cost.

Optionally, the test module interface comprises a plurality of sub-interfaces, one of the plurality of sub-interfaces configured to connect to one of the plurality of channels of the thermocouple input module, and a different sub-interface configured to connect to a different channel of the thermocouple input module.

Optionally, the wiring device includes a 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 the change-over 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 thermocouple input module is realized.

Optionally, the test module interface comprises the same number of sub-interfaces as the number of channels of the thermocouple 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 thermocouple input module, so that the test of a complete thermocouple input module can be realized in each dismounting operation. And for the condition that a plurality of thermocouple input modules exist in one cabinet, the synchronous testing efficiency is greatly improved.

Optionally, the wiring device further includes a switch control unit connected to the test module interface and configured to control on and off of each switch in the test module interface, so as to connect or disconnect each sub-interface in the test module interface with the input interface.

The following technical advantages are achieved in particular here: the test process of a plurality of test branches can be uniformly started or stopped by the aid of the centralized control unit, and test efficiency is improved.

Optionally, the wiring device further comprises a human-machine interface connected to the input interface and configured to display at least one current value of the thermocouple signal generated by the thermocouple signal source.

The following technical advantages are achieved in particular here: therefore, the reference temperature signal can be visualized so as to be compared with the temperature signal acquired by each channel, and the precision difference of the channels can be seen more intuitively.

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 junction device according to the present invention to a thermocouple signal source and to a thermocouple input module;

FIG. 2 shows a block diagram of a junction device according to an exemplary embodiment of the present invention;

FIG. 3 shows a block diagram of a junction device according to another exemplary embodiment of the present invention; and

fig. 4 shows a block diagram of a junction device according to another exemplary embodiment of the present invention.

Reference numerals

10 junction device

20 thermocouple signal source

30 thermocouple input module

11 test module interface

12 input interface

31 channel

100 change-over switch

110. 201, 202 sub-interface

111 upper interface unit

112 lower interface unit

121. 123 positive terminal

122. 124 negative terminal

1111 positive contact

1112 negative contact

130 switch control unit

140 human-machine interface

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 is a schematic diagram illustrating the connection of a wiring device 10 according to the present invention to a thermocouple signal source 20 and to a thermocouple input module 30. As shown in fig. 1, wiring device 10 includes an input interface 12 and a test module interface 11.

The input interface 12 is configured to be connected to a thermocouple signal source 20. The thermocouple signal source 20 may comprise at least one thermocouple, for example, in which case the measuring terminals of the thermocouple have to be connected manually to a medium having a reference temperature. It is also possible that the thermocouple signal source is a current signal generator for simulating thermocouple signal output, which can simulate a corresponding milliamp current signal according to a temperature value of the bus communication configuration.

The test module interface 11 is configured to connect to the plurality of channels 31 of the thermocouple input module 30. Here, there is also an electrical connection between the test module interface 11 and the input interface 12, which enables each of the plurality of channels 31 to be connected to the thermocouple signal source 20. The thermocouple input module 30 may be, for example, a dedicated temperature measuring module (e.g., TC module) of a distributed control system or a programmable logic controller, which is capable of generating a temperature signal from the read thermocouple signals, and fig. 1 shows an example of a thermocouple input module 30, which includes, for example, sixteen channels 31. In this example, sixteen 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 for synchronous pluggable connection with the individual channels 31 of the thermocouple input module 30. This greatly simplifies manual wiring operations and improves system reliability.

Fig. 2 shows a block diagram of the wiring connection device 10 according to an exemplary embodiment of the present invention.

As shown in fig. 2, the input interface 12 of the wiring 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 thermocouple signal source by the positive terminal 121 and to the other end of the thermocouple signal source by the negative terminal 122. The test module interface 11 of the wiring device 10 comprises, for example, sixteen sub-interfaces 110, which sub-interfaces 110 are connected in parallel between the positive terminal 121 and the negative terminal 122 of a terminal set of the input interface 12, thereby enabling the individual channels of the thermocouple input module to be connected in common to both ends of the thermocouple signal source. In addition, a changeover 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 thermocouple input module can be synchronously or sequentially connected to two ends of a thermocouple signal source so as to carry out a channel test experiment.

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 interface exactly fittingly to one channel of the thermocouple input module, a positive contact 1111 and a negative contact 1112 are provided in the upper interface unit 111 and the lower interface unit 112 of each sub-interface 110, for example, the positive contact 1111 being configured to be connected with a positive measurement terminal in the channel of the thermocouple input module (e.g., the measurement terminal M +) of the channel AI1 of the TC analog input module of the ET200_ SPHA), and correspondingly, the negative contact 1112 being configured to be connected with a negative measurement terminal in the channel of the thermocouple input module (e.g., the measurement terminal M-) of the channel AI1 of the TC analog input module of the ET200_ SPHA). Thus, the current value of the thermocouple signal generated by the thermocouple signal source can be detected by the measuring terminal of each channel of the thermocouple input module.

Furthermore, the wiring connection device 10 further comprises a switch control unit 130, the switch control unit 130 being connected to the test module interface 11 and configured to control the switching of the respective switch 100 in the test module interface 11 to switch the respective 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 wiring 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 group of the input interface 12, but are instead connected to the positive and negative terminals of different terminal groups of the input interface 12, respectively. For example, one terminal interface 201 of the test module interface 11 is connected between the positive and

negative terminals

121, 122 of the first terminal set of the input interface 12, and the other terminal interface 202 is connected between the positive and

negative terminals

123, 124 of the second terminal set of the input interface 12. In this way, for example, a channel of the thermocouple input module connected to one sub-interface 201 can be brought into a closed loop with a first thermocouple in the thermocouple signal source 20, and another channel of the thermocouple input module connected to another sub-interface 202 can be brought into a closed loop with a second thermocouple in the thermocouple signal source. Thus, by means of the selector switch 110 arranged in each measuring branch, it is possible to synchronize or sequentially form a closed circuit of a plurality of channels of the thermocouple input module with different thermocouples, enabling a more flexible test solution.

Fig. 4 shows a block diagram of the wiring connection device 10 according to another exemplary embodiment of the present invention.

The embodiment shown in fig. 4 differs from that of fig. 3 in that the wiring device 10 further includes a human-machine interface 140, the human-machine interface 140 being connected to the input interface 12 and configured to be capable of displaying the current value of the thermocouple signal generated by the thermocouple signal source 20. For example, when the thermocouple signal source 20 used is a current signal generator, the current signal generator receives a reference temperature signal and simulates a milliamp current signal generated by a thermocouple according to circuit principles, in which case, a milliamp current value of the currently generated thermocouple signal or a corresponding reference temperature signal can be displayed by means of the human-machine interface 140. Meanwhile, the current signals acquired by the thermocouple input module and the corresponding measured temperature signals can be read from the thermocouple input module, and the precision state of the channel can be clearly seen through comparison with data displayed on a human-computer interface. Here, in addition to using the current signal generator as the thermocouple signal source, it is also conceivable to use other common types of thermocouples such as a k-type thermocouple, a b-type thermocouple, and an e-type thermocouple.

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

1. A wiring device (10), characterized in that the wiring device (10) is configured to connect a thermocouple input module (30) of an industrial control system to be tested to a thermocouple signal source (20), the thermocouple input module (30) is configured to generate a temperature signal from a thermocouple signal of the thermocouple signal source (20) that is read, the wiring device (10) comprising:

an input interface (12) configured to be connected to a thermocouple signal source (20); and

a test module interface (11) configured to connect to a plurality of channels (31) of a thermocouple input module (30), the test module interface (11) being connected with an input interface (12) such that each of the plurality of channels (31) is connected to a thermocouple signal source (20), wherein the test module interface (11) comprises a plurality of sub-interfaces (110), one of the plurality of sub-interfaces (110) being configured to connect to one of the plurality of channels (31) of the thermocouple input module (30), and a different sub-interface (110) being configured to connect to a different channel (31) of the thermocouple input module (30), each of the plurality of channels (31) of the thermocouple input module (30) comprising a positive measurement terminal and a negative measurement terminal, each sub-interface (110) comprising a positive contact (1111) and a negative contact (1112), the positive contact (1111) being configured to connect with the positive measurement terminal in the channel (31) of the thermocouple input module (30) The negative contact (1112) is configured to be connected with a negative measurement terminal in a channel (31) of a thermocouple input module (30) so that a current value of a thermocouple signal generated by a thermocouple signal source (20) is detected by the thermocouple input module (30) through the positive measurement terminal and the negative measurement terminal.

2. The wiring device (10) according to claim 1, characterized in that the wiring device (10) comprises a changeover switch (100) connected between the sub-interface (110) of the test module interface (11) and the input interface (12).

3. The wiring device (10) according to claim 1 or 2, characterized in that the test module interface (11) comprises the same number of sub-interfaces (110) as the number of channels of the thermocouple input module (30).

4. The wiring device (10) according to claim 3, characterized in that the wiring device (10) further comprises a switch control unit (130), the switch control unit (130) being connected to the test module interface (11) and configured to control the switching of the respective changeover switch (100) in the test module interface (11) to switch the respective sub-interface (110) in the test module interface (11) on or off with the input interface (12).

5. The wiring device (10) according to claim 1, wherein the wiring device (10) further comprises a human machine interface (140), the human machine interface (140) being connected to the input interface (12) and configured to display a current value of a thermocouple signal generated by the thermocouple signal source (20).