CN203387493U - Digital signal isolating circuit for programmable logic controller (PLC) of scrapper plate conveyer - Google Patents
Digital signal isolating circuit for programmable logic controller (PLC) of scrapper plate conveyer Download PDFInfo
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- CN203387493U CN203387493U CN201320422757.0U CN201320422757U CN203387493U CN 203387493 U CN203387493 U CN 203387493U CN 201320422757 U CN201320422757 U CN 201320422757U CN 203387493 U CN203387493 U CN 203387493U
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Abstract
The utility model discloses a digital signal isolating circuit for a PLC of a scrapper plate conveyer under the shaft. An underground solenoid valve includes an intrinsic safe circuit, and a PLC digital quantity module of the scrapper plate conveyer is a non-intrinsic safe circuit; and when the PLC digital quantity module is used to drive the solenoid valve, the non-intrinsic safe circuit is connected with the intrinsic safe circuit, which requires isolation. The isolating circuit, which is composed of an electronic integrated circuit, mainly comprises a signal input part, a signal isolation part and a signal output part, wherein input signals come from the PLC digital quantity module, output signals are connected with the solenoid valve, and the input signals are isolated via an optoelectronic coupler U1 and then control connection of a driver U2, so that the isolated signals control motion of the solenoid valve, and the goal of isolating digital signals is achieved. It is solved the isolation problem happening when the PLC digital quantity module (i.e., the non-intrinsic safe circuit) drives the solenoid valve (i.e., the intrinsic safe circuit); and the digital signal isolating circuit has the advantages including high response speed and high reliability.
Description
Affiliated technical field:
The utility model discloses a kind of digital quantity signal buffer circuit for colliery underground scraper conveyor PLC controller.
Background technology:
The colliery underground magnetic valve is the essential safe type circuit, the digital module of drag conveyor PLC controller is non-essential safe type circuit, while utilizing the digital module driving electromagnetically operated valve of PLC controller, be the connection of immaterial safety circuit and intrinsically safe circuit, need isolation.So designed a kind of digital signal buffer circuit, solved isolating problem when the non-intrinsically safe circuit of PLC controller digital module drives the electromagnetically operated valve intrinsically safe circuit.
Summary of the invention:
The purpose of this utility model is a kind of digital signal buffer circuit of design, the isolating problem while solving the non-intrinsically safe circuit driving of PLC controller digital module electromagnetically operated valve intrinsically safe circuit.
The utility model is realized by the following technical solutions: the control circuit board that utilizes a kind of electronic integrated circuit to form is arranged in the control cabinet explosion-proof chamber, by mainly being comprised of stimulus part, signal isolated part and segment signal output.
The annexation of input signal partial circuit is: signal input terminal X1, X2, X3, X4 pass through respectively resistance R 5, R6, R7, R8, R9 and D1 parallel connection, connect the other end of R5 and the input of photoelectrical coupler U1, R10 and D2 parallel connection, connect the other end of R6 and the input of photoelectrical coupler U1, R11 and D3 parallel connection, connect the other end of R7 and the input of photoelectrical coupler U1, R12 and D4 parallel connection, connect the other end of R8 and the input of photoelectrical coupler U1.
Signal is processed and the annexation of output circuit is: the output of photoelectrical coupler U1 meets respectively R1, R2, R3, R4, the input of the driver connected U2 of output of photoelectrical coupler U1, the output signal of driver U2 connects the control loop of electromagnetically operated valve, realizes the isolation features to the PLC digital quantity signal.
Described power unit: input terminal X5, X6 enter power module U3, be output as+12V of power module U3 power supply, for photoelectrical coupler U1 and driver U2 work, Y5 is power module U3 output+12V power supply, X5 and Y5 receive electric power selection apparatus JP, and selecting the operating voltage of electromagnetically operated valve by electric power selection apparatus JP is 24V or 12V.
Above-mentioned technical solution, the buffer circuit that utilizes electronic integrated circuit to form, realize the isolation of input signal by photoelectrical coupler, thereby make the action of the signal controlling electromagnetically operated valve after isolation, reaches the purpose of isolation digital quantity signal.Solve isolating problem when the non-intrinsically safe circuit of PLC controller digital module drives the electromagnetically operated valve intrinsically safe circuit, there is fast response time, high reliability.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
The accompanying drawing explanation:
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
Embodiment:
As shown in Figure 1, the annexation of input signal partial circuit is: signal input terminal X1, X2, X3, X4 pass through respectively resistance R 5, R6, R7, R8, R9 and D1 parallel connection, connect the other end of R5 and the input of photoelectrical coupler U1, R10 and D2 parallel connection, connect the other end of R6 and the input of photoelectrical coupler U1, R11 and D3 parallel connection, connect the other end of R7 and the input of photoelectrical coupler U1, R12 and D4 parallel connection, connect the other end of R8 and the input of photoelectrical coupler U1.
Signal is processed and the annexation of output circuit is: the output of photoelectrical coupler U1 meets respectively R1, R2, R3, R4, the input of the driver connected U2 of output of photoelectrical coupler U1, the output signal of driver U2 connects the control loop of electromagnetically operated valve, realizes the isolation features to the PLC digital quantity signal.
Described power unit: input terminal X5, X6 enter power module U3, be output as+12V of power module U3 power supply, for photoelectrical coupler U1 and driver U2 work, Y5 is power module U3 output+12V power supply, X5 and Y5 receive electric power selection apparatus JP, and selecting the operating voltage of electromagnetically operated valve by electric power selection apparatus JP is 24V or 12V.
The control principle of embodiment of the present utility model is: input X1, X2, X3, X4 are from the PLC digital module, when the PLC digital module has signal output, the PLC digital quantity signal enters photoelectrical coupler U1 by resistance R 5, R6, R7, R8 are laggard respectively, signal is by controlling driver U2 conducting after photoelectric coupler isolation, thereby make the action of the signal controlling electromagnetically operated valve after isolation, reach the purpose of isolation digital quantity signal.
It is known according to above explanation: when the PLC digital module has signal output, the PLC digital quantity signal becomes intrinsically safe circuit after the buffer circuit isolation, can control the action of the electromagnetically operated valve of intrinsically safe circuit, buffer circuit has played the effect of isolating non-intrinsically safe circuit digital quantity signal and intrinsic safety digital quantity signal.
Finally should be noted that: allly only depend on the conversion electron line construction and reach the various conversion of the present utility model purpose, within all should dropping on protection range of the present utility model.
Claims (1)
1. a drag conveyor PLC controller digital signal buffer circuit, circuit board is arranged in the control cabinet explosion-proof chamber, it is characterized in that: stimulus part, signal processing and output, power unit, consist of;
The annexation of input signal partial circuit is: signal input terminal X1, X2, X3, X4 pass through respectively resistance R 5, R6, R7, R8, R9 and D1 parallel connection, connect the other end of R5 and the input of photoelectrical coupler U1, R10 and D2 parallel connection, connect the other end of R6 and the input of photoelectrical coupler U1, R11 and D3 parallel connection, connect the other end of R7 and the input of photoelectrical coupler U1, R12 and D4 parallel connection, connect the other end of R8 and the input of photoelectrical coupler U1;
Signal is processed and the annexation of output circuit is: the output of photoelectrical coupler U1 meets respectively R1, R2, R3, R4, the output of photoelectrical coupler U1 is the input of driver connected U2 respectively, the output signal of driver U2 connects the control loop of electromagnetically operated valve, realizes the isolation features to the PLC digital quantity signal;
Described power unit: input terminal X5, X6 enter power module U3, be output as+12V of power module U3 power supply, for photoelectrical coupler U1 and driver U2 work, Y5 is power module U3 output+12V power supply, X5 and Y5 receive electric power selection apparatus JP, and selecting the operating voltage of electromagnetically operated valve by electric power selection apparatus JP is 24V or 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320422757.0U CN203387493U (en) | 2013-07-09 | 2013-07-09 | Digital signal isolating circuit for programmable logic controller (PLC) of scrapper plate conveyer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320422757.0U CN203387493U (en) | 2013-07-09 | 2013-07-09 | Digital signal isolating circuit for programmable logic controller (PLC) of scrapper plate conveyer |
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| Publication Number | Publication Date |
|---|---|
| CN203387493U true CN203387493U (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320422757.0U Expired - Lifetime CN203387493U (en) | 2013-07-09 | 2013-07-09 | Digital signal isolating circuit for programmable logic controller (PLC) of scrapper plate conveyer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410405A (en) * | 2014-09-29 | 2015-03-11 | 中国航天科技集团公司第九研究院第七七一研究所 | Implementation method of programmable general digital quantity I/O signal conditioning |
| CN109884952A (en) * | 2019-03-20 | 2019-06-14 | 上海久辉电气有限公司 | A kind of soft starting system controller for coal mine transfer machine with two-stage drawing strickle |
-
2013
- 2013-07-09 CN CN201320422757.0U patent/CN203387493U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410405A (en) * | 2014-09-29 | 2015-03-11 | 中国航天科技集团公司第九研究院第七七一研究所 | Implementation method of programmable general digital quantity I/O signal conditioning |
| CN109884952A (en) * | 2019-03-20 | 2019-06-14 | 上海久辉电气有限公司 | A kind of soft starting system controller for coal mine transfer machine with two-stage drawing strickle |
| CN109884952B (en) * | 2019-03-20 | 2022-02-01 | 上海久辉电气有限公司 | Soft start system controller for coal mine double-speed scraper conveyor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |
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| CX01 | Expiry of patent term |