CN210093194U

CN210093194U - Simple voltage-isolated double-circuit isolation circuit structure

Info

Publication number: CN210093194U
Application number: CN201921343306.1U
Authority: CN
Inventors: 刘金龙
Original assignee: LANGFANG D&G MACHINERY TECHNOLOGY Co Ltd
Current assignee: LANGFANG D&G MACHINERY TECHNOLOGY Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-02-18
Anticipated expiration: 2029-08-19

Abstract

A simple voltage-isolated two-way isolation circuit structure comprises a power supply input end, a first 0-10V analog output end, a second 0-10V input end and a second 0-10V analog output end, wherein a first capacitor and a second capacitor are connected in parallel between the input ends and the output ends of a first T5530 isolation transmitter and a second T5530 isolation transmitter to remove high-frequency noise; the switch module power supply is arranged at the input end of the power supply input end, the first capacitor and the second capacitor are connected in parallel at the output end of the switch module power supply, and the 7824 circuit is positioned between the first capacitor C1 and the second capacitor C2; the utility model discloses realize that electrical insulation's signal between input and the output is kept apart, by wide application in aspects such as industrial measurement system, medical electronic equipment, power equipment, suitable voltage, electric current scope are wider, can prevent to damage the PLC module when analog quantity joins conversely.

Description

Simple voltage-isolated double-circuit isolation circuit structure

Technical Field

The utility model relates to a PLC analog quantity control's circuit isolation technical field especially relates to a double-circuit isolation circuit structure of simple and easy type voltage isolation suitable for various PLC analog quantity control system field.

Background

With the progress of modern electronic technology, various electronic products are more and more, the PLC module can be damaged by overlarge current impact, reverse connection of a power supply and irregular wiring, and even more, serious accidents and loss cannot be measured can be caused.

Therefore, the designer of the present invention, through careful research and design, synthesizes the experience and achievement of the related industry for many years, and develops a simple voltage-isolated dual-path isolation circuit structure to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a double-circuit isolating circuit structure of simple and easy type voltage isolation, it has the isolation protect function, realizes that electrical insulation's signal keeps apart between input and the output, by wide application in aspects such as industrial measurement system, medical electronic equipment, power equipment, has characteristics such as output precision height, linearity are good, the temperature floats the coefficient for a short time.

In order to achieve the purpose, the utility model discloses a simple voltage-isolated two-way isolating circuit structure, which comprises a power input end, a first way 0-10V analog output end, a second way 0-10V input end and a second way 0-10V analog output end, wherein the power input end comprises a first terminal, a second terminal and a third terminal, and the power input end is connected with a power supply; the first path of 0-10V analog output end and the second path of 0-10V analog output end are connected with analog output, and the device is characterized in that:

also included is a switch module power supply, a diode, a first capacitor, a second capacitor, a 7824 circuit, a first sliding varistor, a first resistor, a first T5530 isolation transmitter, a second sliding varistor, a second resistor, and a second T5530 isolation transmitter, the first and second capacitors connected in parallel between the input and output of the first and second T5530 isolation transmitters to remove high frequency noise;

the switch module power supply is arranged at the input end of the power supply input end, the first capacitor and the second capacitor are connected in parallel at the output end of the switch module power supply, and the 7824 circuit is arranged between the first capacitor C1 and the second capacitor C2 so as to form a three-terminal voltage stabilizing circuit.

Wherein: the input ends of the first sliding rheostat, the first resistor and the first T5530 isolation transmitter are connected in series with a first path of 0-10V voltage isolation input end to form a first path of input and output isolation circuit, and the first path of 0-10V analog output end is arranged at the output end of the first T5530 isolation transmitter.

Wherein: the input ends of the second sliding rheostat, the second resistor and the second T5530 isolation transmitter are connected in series with the second path of 0-10V voltage isolation input end to form a second path of input and output isolation circuit, and the second path of 0-10V analog output end E is arranged at the output end of the second T5530 isolation transmitter.

Wherein: the first capacitor C1 and the second capacitor C2 are electrolytic capacitors, container capacitors or ceramic capacitors.

Wherein: the switch module power supply 100 is a 220V/24V switch module power supply.

Wherein: the diode is connected in series with the output end of the switch module power supply.

According to the above structure, the utility model discloses a simple and easy type voltage isolation's double-circuit isolating circuit structure has following effect:

1. the intelligent control system has an isolation protection function, realizes the signal isolation of electrical insulation between input and output, receives 0-10V signal input from a site, and outputs the signal input to a control room or DCS in a standard signal 0-10V mode.

2. The input, output, power supply and isolated power supply output are isolated from each other, and are widely applied to the aspects of industrial measurement systems, medical electronic equipment, electric power equipment and the like.

3. Have output accuracy height, linearity good, temperature coefficient of drift characteristics such as little, under equal model, suitable voltage, electric current scope are wider, and the isolator has steady voltage protection architecture, has circuit isolation function, can the greatly reduced PLC module damage probability, and whole circuit structure can avoid damaging the PLC module because of the electric current is too big, can prevent to damage the PLC module when analog quantity joins conversely.

The details of the present invention can be obtained from the following description and the attached drawings.

Drawings

Fig. 1 shows a schematic diagram of a simple voltage-isolated two-way isolation circuit structure of the present invention.

Detailed Description

Referring to fig. 1, a simple voltage isolated dual-circuit isolation circuit structure of the present invention is shown.

The simple voltage-isolated two-way isolation circuit structure comprises a power input end A, a first 0-10V input end B, a first 0-10V analog quantity output end C, a second 0-10V input end D and a second 0-10V analog quantity output end E, wherein the power input end A comprises a first terminal 1, a second terminal 2 and a third terminal 3, L of an external power supply is connected with the first terminal 1, N of the external power supply is connected with the second terminal 2, E of the external power supply is connected with the third terminal 3, the first 0-10V input end B comprises a fourth terminal 4, a fifth terminal 5 and a sixth terminal 6, the first 0-10V analog quantity output end C comprises a seventh terminal 7 and an eighth terminal 8, the second 0-10V input end D comprises a ninth terminal 9, a tenth terminal 10 and an eleventh terminal 11, the second 0-10V analog quantity output end E comprises a twelfth terminal 12 and a thirteenth terminal 13, the power input end A is used for connecting a power supply; the first path of 0-10V analog output end C and the second path of 0-10V analog output end E are used for being connected with analog output.

And a switch module power supply 100, a diode D1, a first capacitor C1, a second capacitor C2, a 7824 circuit 101, a first sliding varistor R1, a first resistor R2, a first T5530 isolation transmitter 102, a second sliding varistor R3, a second resistor R4, and a second T5530 isolation transmitter 103, the first capacitor C1 and the second capacitor C2 connected in parallel between the input and output of the first T5530 isolation transmitter 102 and the second T5530 isolation transmitter 103 for removing high frequency noise; the first slide rheostat R1 and the first resistor R2 form a current limiting circuit to play a role in limiting current; the second slide rheostat R3 and the second resistor R4 form a current limiting circuit to play a role in limiting current;

each of the first sliding rheostat R1, the first resistor R2, the second sliding rheostat R3 and the second resistor R4 is not limited to a certain material, a certain package or a certain capacitance.

The first capacitor C1 and the second capacitor C2 may be electrolytic capacitors, capacitor capacitors or ceramic capacitors, and each capacitor is not limited to a material, a package or a capacitance.

The switch module power supply 100 is a 220V/24V switch module power supply, and is arranged at the input end of a power supply input end A.

The diode D1 is connected in series with the output terminal of the switch module power supply 100, the first capacitor C1 is connected in parallel with the output terminal of the switch module power supply 100, the second capacitor C2 is connected in parallel with the output terminal of the switch module power supply 100, and the 7824 circuit 101 is located between the first capacitor C1 and the second capacitor C2, so that the first capacitor, the second capacitor and the 7824 circuit 101 form a three-terminal voltage stabilizing circuit.

The input ends of the first sliding rheostat R1, the first resistor R2 and the first T5530 isolation transmitter 102 are connected in series with a first path of 0-10V voltage isolation input end B to form a first path of input and output isolation circuit, and the first path of 0-10V analog output end C is arranged at the output end of the first T5530 isolation transmitter 102.

The input ends of the second sliding rheostat R3, the second resistor R4 and the second T5530 isolation transmitter 103 are connected in series with the second path of 0-10V voltage isolation input end D to form a second path of input and output isolation circuit, and the second path of 0-10V analog output end E is arranged at the output end of the second T5530 isolation transmitter 103.

The working principle of the utility model is as follows:

the power L is sent into the switch module power, outputs direct current voltage, and reduces the fluctuation of circuit voltage through parallelly connected first electric capacity C1, second electric capacity C2 and plays the effect of considering ripples, can the steady voltage. The first path of 0-10V input end is connected in series with a sliding resistor R1 and a resistor R2 to play a role in limiting current; the analog output end plays a role in four-end isolation through a T5530 isolation module: the signal input, the signal output, the power supply and the power output are mutually isolated, and the PLC module is protected. The circuit structure with double-circuit isolation is realized through a 0-10V input end and a 0-10V analog output end.

Only A in the whole circuit structure is provided with an external power supply, so that the probability of damaging circuit devices due to wiring errors is reduced. The sensor power is wholly provided with a power supply by an isolation circuit, and the analog quantity of the sensor is accessed through the input end of the isolation circuit, passes through the isolation circuit and is connected to the PLC module through the output end. The PLC module is not directly connected with an external circuit, so that the phenomenon that poor contact current rises due to wiring errors, circuit induction and untight wiring is avoided, and the damage of the module can be accelerated if the PLC module runs for a long time. Four-terminal isolation is achieved through the design of the whole isolation circuit: the signal input, the signal output, the power supply and the power output are mutually isolated, and the PLC module is protected.

It is to be understood that the above description and illustrations are exemplary only and are not intended to limit the present disclosure, application, or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention is intended to include any embodiments that fall within the foregoing description and the appended claims.

Claims

1. A simple voltage-isolated two-way isolation circuit structure comprises a power supply input end, a first 0-10V analog output end, a second 0-10V input end and a second 0-10V analog output end, wherein the power supply input end comprises a first terminal, a second terminal and a third terminal, and is connected with a power supply; the first path of 0-10V analog output end and the second path of 0-10V analog output end are connected with analog output, and the device is characterized in that:

2. A simplified voltage isolated dual path isolation circuit configuration as defined in claim 1, wherein: the input ends of the first sliding rheostat, the first resistor and the first T5530 isolation transmitter are connected in series with a first path of 0-10V voltage isolation input end to form a first path of input and output isolation circuit, and the first path of 0-10V analog output end is arranged at the output end of the first T5530 isolation transmitter.

3. A simplified voltage isolated dual path isolation circuit configuration as defined in claim 1, wherein: the input ends of the second sliding rheostat, the second resistor and the second T5530 isolation transmitter are connected in series with the second path of 0-10V voltage isolation input end to form a second path of input and output isolation circuit, and the second path of 0-10V analog output end E is arranged at the output end of the second T5530 isolation transmitter.

4. A simplified voltage isolated dual path isolation circuit configuration as defined in claim 1, wherein: the first capacitor C1 and the second capacitor C2 are electrolytic capacitors, container capacitors or ceramic capacitors.

5. A simplified voltage isolated dual path isolation circuit configuration as defined in claim 1, wherein: the switch module power supply 100 is a 220V/24V switch module power supply.

6. A simplified voltage isolated dual path isolation circuit configuration as defined in claim 1, wherein: the diode is connected in series with the output end of the switch module power supply.