CN215769443U

CN215769443U - Analog output control module with signal interruption protection function

Info

Publication number: CN215769443U
Application number: CN202121950180.1U
Authority: CN
Inventors: 赖朴溪
Original assignee: Guangzhou Development Power Technology Co ltd
Current assignee: Guangzhou Development Power Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-02-08
Anticipated expiration: 2031-08-18

Abstract

The utility model discloses an analog output control module with a signal break protection function, which comprises: the analog quantity control function module is used for receiving a control signal sent by the upper computer and calculating an output signal value of the analog quantity output control module; and the super signal detection function module and the analog quantity control function module form a loop and are used for detecting whether the output signal value is abnormal or not. The analog quantity output control module is simple in structure and small in size, can realize information sharing and improves the universality of the module.

Description

Analog output control module with signal interruption protection function

Technical Field

The utility model relates to the technical field of analog quantity control modules, in particular to an analog quantity output control module with a signal break protection function.

Background

The output end can be divided into a switching value type control module, an analog quantity control module and the like according to the control of an industrial standard. The analog quantity control module generally outputs a standard signal of 1-5V or 4-20MA, and the standard signal is sent to a field to control a valve, an actuator or other control components so as to meet the requirements of a process flow. The field control component depends on whether links such as control signals of the analog quantity control module, cables for conveying control lines, wiring terminals and the like are normal or not. If a link in the loop is broken or shunted by short circuit, the normal operation of the production process is directly influenced, and even the production process is directly stopped and interrupted. Therefore, important control signals are currently being addressed. The detection device for controlling signal interruption is generally required to be arranged, once the control loop is disconnected, the detection outputs a signal to control the electromagnetic valve or other parts immediately, the valve or equipment is directly kept to stop running, and the direct influence on the technological process is avoided.

However, the analog quantity control module and the interrupt signal detection module in the prior art are usually separately arranged, which not only has low safety, but also does not have a control detection function of shunting control signals. Simultaneously, because separately set up detection module and lead to this structure bulky, the structure is complicated, and then is unfavorable for the requirement that the on-the-spot was used widely and was integrated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an analog output control module with a broken signal protection function, which is used for solving the problems of complex structure, large volume and single function in the analog output control module in the prior art.

In order to overcome the defects in the prior art, the utility model provides an analog output control module with a signal break protection function, which comprises:

the analog quantity control function module is used for receiving a control signal sent by the upper computer and calculating an output signal value of the analog quantity output control module;

and the super signal detection function module and the analog quantity control function module form a loop and are used for detecting whether the output signal value is abnormal or not.

Furthermore, the output end of the analog quantity control functional module is connected with the input end of the super signal detection functional module; and the first output end of the super signal detection functional module is connected with the input end of the analog quantity control functional module.

Further, the super-signal detection function module is further configured to:

when the output signal value is detected to be abnormal, the output signal is grounded through a second output end; and outputting a field control signal through the first output end, and uploading the field control signal to the upper computer through the analog quantity control functional module.

Further, the field control signal includes: alarm signals and interlock signals.

Further, the circuit of the super signal detection functional module consists of a resistor.

Further, the resistance value of the resistor is 250 ohms.

Compared with the prior art, the utility model has the beneficial effects that:

1) the utility model can increase the function of the analog quantity control module, so that the reaction speed is faster when the signal is interrupted;

2) according to the utility model, the two modules are integrated into a whole, so that the module structure is more compact, the control system is more suitable for integration, and the universality of the control system module is improved;

3) the utility model can send the break signal to the central control system in time, complete the detection and alarm of the field equipment at the system level and the interlock reaction disposal of the related system, and fully play the role of information sharing.

Drawings

Fig. 1 is a schematic structural diagram of an analog output control module with an interrupt signal protection function according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.

It is to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, an embodiment of the present invention provides an analog output control module with a signal-break protection function, including:

It should be noted that, in the existing method, the analog quantity control module and the interrupt signal detection module are usually separately arranged, so that not only is the structure of the module complex and the safety low, but also the analog quantity control module does not have a control detection function of controlling signal shunting (i.e. control current over-limit). In addition, the modules which are separately arranged are large in size, so that the requirements of field popularization and integration are not met, and the thought requirement of a centralized control system is not utilized. Therefore, the present embodiment aims to provide an analog output control module having a simple structure, a smaller size, and a control and detection function for controlling signal splitting.

Specifically, as shown in fig. 1: the analog quantity control output module is communicated with an upper computer, receives signals, calculates the output current (voltage) value of the module, outputs the output current (voltage) value to a control component required by local equipment through a control loop and a module hardware terminal to form a loop, and once the control current is abnormal, the abnormal condition of the control current is detected in the over-signal detection functional block, for example, when the current is less than a minimum threshold value of 3.8MA or greater than a maximum threshold value of 20.4MA, the over-signal detection functional block immediately responds. It should be noted that 3.8MA and 20.4MA in this embodiment may be set according to actual requirements, and are not limited herein.

The analog quantity control module and the broken signal detection module form a loop in the following mode: the output end of the analog quantity control functional module is connected with the input end of the super signal detection functional module; and the first output end of the super signal detection function module is connected with the input end of the analog quantity control function module.

In one embodiment, the super-signal detection function module is further configured to:

It should be noted that when the ultra-signal detection function module detects an abnormality, two reactions can be immediately made, one is to immediately output a signal to the local through the second output end to complete a protection interlocking function in a certain range, and the other is to upload the signal to an upper computer (or system) through the communication function of the analog quantity control output function block so as to realize the information sharing function of the whole system, so that the functions of alarming, interlocking, outputting, cutting off algorithms and the like of the field control signal abnormality of the equipment can be conveniently realized.

In one embodiment, the super signal detection function is comprised of a resistor. The resistance of the resistor can be set to 250 ohms in general.

The analog quantity output control module has the advantages of simple structure and small volume, and can realize information sharing and improve the universality of the module.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides an analog output control module of disconnected signal protect function in area which characterized in that includes:

2. The analog quantity output control module with the signal break protection function according to claim 1, wherein an output end of the analog quantity control function module is connected with an input end of the super signal detection function module; and the first output end of the super signal detection functional module is connected with the input end of the analog quantity control functional module.

3. The analog output control module with the function of protecting a signal from interruption according to claim 2, wherein the function module for detecting a super signal is further configured to:

4. The analog output control module with the function of protecting the interrupt signal according to claim 3, wherein the field control signal comprises: alarm signals and interlock signals.

5. The analog output control module with the function of protecting a signal from interruption of claim 1, wherein the circuit of the function module for detecting a super signal is composed of a resistor.

6. The analog quantity output control module with the function of signal break protection according to claim 5, characterized in that the resistance value of the resistor is 250 ohms.