CN101893868A - Analog output module - Google Patents
Analog output module Download PDFInfo
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- CN101893868A CN101893868A CN2010101850575A CN201010185057A CN101893868A CN 101893868 A CN101893868 A CN 101893868A CN 2010101850575 A CN2010101850575 A CN 2010101850575A CN 201010185057 A CN201010185057 A CN 201010185057A CN 101893868 A CN101893868 A CN 101893868A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The present invention relates to a kind of analog output module, be disposed at this analog output module of PLC (programmable logic controller (PLC)), can reduce lead-out terminal effectively.Described analog output module has: the signal transfer part, and it provides input signal as first signal of voltage form or the secondary signal of current forms; Outlet terminal, it exports the signal that described signal transfer part is provided to outside; Analog multiplexer, it optionally offers above-mentioned outlet terminal with described first signal or secondary signal.
Description
Technical field
The present invention relates to a kind of analog output module, it is used for exporting simulating signal to outside, is specifically related to a kind ofly convert digital signal to simulating signal go forward side by side PLC (the Programmable LogicController: simulating signal output module programmable logic controller (PLC)) of line output.
Background technology
In traditional industry spot, automation equipment is made of the machinery and equipment of using relay etc.If want to change the function of the automation equipment that constitutes by machinery and equipment, need one by one the wiring of conversion unit inside again, therefore comparatively bother.Developed PLC in order to address the above problem.
PLC is a programmable logic controller (PLC), and PLC generally plays the effect identical with computer, and it receives the signal from machine, and after handling according to the content of having programmed in inside, exports the signal of having handled to machine.PLC is replaced the function of relay, timer and counter equal controller by semiconductor elements such as integrated circuit and transistors, therefore on basic sequence control function, appended calculation function, thereby can carry out programmed control, and according to the program on the reservoir that is stored in this PLC inside in advance, the logic that puts rules into practice.PLC can be applicable in the multiple work, for example, the numerical value setting of the control of device, device, the control of time, in real time monitoring, data real-time collection and to the startup of safety feature etc.
PLC has: analog output module, and it offers signal in the machine of automation equipment etc.; And analog input module, it is used to receive the signal from machine.Analog input module will become digital signal by the analog signal conversion that machine provides, and offer inner arithmetic processing section.The reflection calculation process result's who is provided by arithmetic processing section digital signal is provided analog output module, and this digital signal is converted to simulating signal and passes to machine.
The simulating signal that is passed to machine has voltage form and current forms.The analog output module of PLC need possess, voltage output end that the simulating signal of voltage form is exported and current output terminal that the simulating signal of current forms is exported.Usually, because a PLC carries out essence control to different machines simultaneously, so a PLC has a plurality of terminals (Terminal).Therefore, for the simulating signal of voltage form and the simulating signal of current forms, provide by a plurality of terminals, analog output module need have the output terminal subnumber that doubles the machine number that can connect.
Summary of the invention
The objective of the invention is to, a kind of PLC analog output module that can reduce lead-out terminal effectively is provided.
In order to achieve the above object, analog output module provided by the invention, it has: the signal transfer part, it provides input signal as first signal of voltage form or the secondary signal of current forms; Outlet terminal (Terminal), it exports the signal that the signal transfer part provides to outside; Analog multiplexer, it optionally offers above-mentioned outlet terminal with above-mentioned first signal or secondary signal.
In addition, above-mentioned analog output module also has: the current/voltage selector switch, it provides control signal, so that above-mentioned multiplexer is selected above-mentioned first signal or above-mentioned secondary signal.
In addition, above-mentioned analog output module is characterized in that, the signal transfer part has: digital to analog converter, and receiving above-mentioned input signal and converting thereof into simulating signal provides; Voltage amplification portion after its voltage signal that above-mentioned digital to analog converter is provided amplifies, provides as above-mentioned first signal; And the electric current enlarging section, after its current signal that above-mentioned digital to analog converter is provided amplifies, provide as above-mentioned secondary signal.
In addition, analog output module also has arithmetic processing apparatus, and it will provide as above-mentioned input signal corresponding to calculation process result's digital signal.
In addition, the signal transfer part also has photoelectrical coupler, and it forms insulation between mimic channel portion and above-mentioned arithmetic processing apparatus, and this mimic channel portion comprises, above-mentioned digital to analog converter, above-mentioned voltage amplification portion and above-mentioned electric current enlarging section.
In addition, in analog output module, above-mentioned analog multiplexer comprises: the route diversion switch, and it offers above-mentioned outlet terminal with first signal that above-mentioned voltage amplification portion provides, and perhaps the secondary signal that above-mentioned electric current enlarging section is provided offers above-mentioned outlet terminal; And impact damper, after its control signal that above-mentioned current/voltage selector switch is provided cushions, export as the control signal of above-mentioned route diversion switch.
According to the present invention, the analog output circuit that PLC had from an original 2n outlet terminal, changes into and only needs n outlet terminal, and can constitute and performance by holding circuit equally.Therefore, when analog output circuit of the present invention is applicable to PLC, the more effectively wiring of configuration-system.
Description of drawings
Fig. 1 is the block diagram of existing analog output module.
Fig. 2 is the analog output module block diagram according to desirable embodiment of the present invention.
Fig. 3 is the internal circuit of analog multiplexer shown in Figure 2 and the internal circuit synoptic diagram of current/voltage selector switch.
Fig. 4 is the action schematic of analog multiplexer shown in Figure 3.
The reference numeral explanation
100:MPU 210: analog multiplexer
220: signal transfer part 230: outlet terminal
300: current/voltage selector switch portion
Embodiment
Those of ordinary skill in the art followingly desirable embodiment of the present invention is elaborated, so that can implement technological thought of the present invention easily with reference to accompanying drawing.
Fig. 1 is the block diagram of existing analog output module, as shown in Figure 1, analog output module has: microprocessing unit (Micro process unit is hereinafter to be referred as MPU) 10, the first analog output circuit 20_1, the second analog output circuit 20_2 ..., n analog output circuit 20_n.Analog output circuit 20_1～20_n, respectively by each self-corresponding outlet terminal, output is used to drive the analog voltage output signal and the analog current output signal of external unit.After MPU10 carried out calculation process with the digital signal of input, the digital signal corresponding with this result offered analog output circuit 20_1～20_n.
The first analog output circuit 20_1 has: photoelectrical coupler 21, digital to analog converter 22, voltage amplification portion 23, electric current enlarging section 24, voltage signal outlet terminal 25 and current signal outlet terminal 26.Second analog output circuit 20_2 to the n analog output circuit 20_n also has the identical in fact formation with the first analog output circuit 20_1.Photoelectrical coupler 21, its signal that MPU10 is provided passes to digital to analog converter 22, and make between MPU10 and the mimic channel portion and insulate, wherein, above-mentioned MPU10 handles laggard line output to digital signal, and above-mentioned mimic channel portion comprises digital to analog converter 22, voltage amplification portion 23 and electric current enlarging section 24.Digital to analog converter 22 will convert simulating signal to by the digital signal of photoelectrical coupler 21 transmission.The voltage signal that voltage amplification portion 23 logarithmic mode converters 22 provide amplifies, and exports corresponding voltage signal outlet terminal 25 to.The current signal that electric current enlarging section 24 logarithmic mode converters 22 provide amplifies, and exports corresponding current signal outlet terminal 26 to.
Usually, when analog output circuit have n channel C H1, CH2 ..., during CHn, have 2n outlet terminal.That is because each passage needs to distinguish the terminal of transfer overvoltage signal and current signal.Therefore, when the passage of analog output circuit increased, required terminal number increased to 2n.Therefore, the miniaturization to PLC with analog output circuit has brought difficulty.In addition, 2n outlet terminal is connected with the wiring of external unit also brings a lot of difficulties.When replacing is connected the external unit on the analog output circuit and when need changing outside wiring, need reconnects 2n wiring, so bother very much.In order to address the above problem, the invention provides a kind of analog output circuit that can reduce outlet terminal.
Fig. 2 is the block diagram of the analog output module of desirable embodiment according to the present invention.
With reference to Fig. 2, according to the analog output module 1000 of present embodiment, it has: MPU100, a plurality of analog output circuit 200_1～200_n and current/voltage selector switch portion 300.After MPU100 carried out calculation process to the numerical information of input, digital signal that will be corresponding with this result offered each analog output circuit 200_1～200_n.Therefore as shown in Figure 2, a plurality of analog output current 200_1～200_n have identical formation, only the inside of analog output circuit 200_1 are constituted to be elaborated.
Analog output circuit 200_1 has: analog multiplexer 210, signal transfer part 220 and outlet terminal 230.Analog multiplexer 210 from signal transfer part 220 input first signal or secondary signals, and offers outlet terminal 230.The digital signal that signal transfer part 220 provides MPU100 offers analog multiplexer 210 after converting the secondary signal of first signal of voltage form or current forms to.Outlet terminal 230 is to be used for exporting the signal that analog multiplexer 210 provides to outside terminal.Current/voltage selector switch portion 300 provides control signal, so that multiplexer is selected first signal or secondary signal.
As shown in Figure 2, because the analog output module in the present embodiment has analog multiplexer 210, therefore, can utilize an outlet terminal output analog voltage signal and analog current signal.
Fig. 3 is the internal circuit of analog multiplexer shown in Figure 2 and the internal circuit synoptic diagram of current/voltage selector switch.Fig. 4 is the action schematic of analog multiplexer shown in Figure 3.
With reference to Fig. 3, analog multiplexer 210 has: route diversion switch SW 1, SW2, and it will offer outlet terminal 230 by first signal that voltage amplification portion 223 provides, or will be offered outlet terminal 230 by the secondary signal that electric current enlarging section 224 provides; Impact damper 211,212, it will export route diversion switch SW 1, SW2 to after will being cushioned by the control signal that current/voltage selector switch portion 300 provides.
Current/voltage selector switch portion 300 has current/voltage selector switch SW3, and it connects analog multiplexer and ground voltage terminal.The side of current/voltage selector switch SW3 disposes pull-up resistor.When current/voltage selector switch SW3 is switched on, analog multiplexer 210 will be passed to outlet terminal 230 by the secondary signal of electric current enlarging section 224 outputs, and when current/voltage switch SW 3 is disconnected, analog multiplexer 210 will be passed to outlet terminal 230 by first signal of electric current enlarging section 224 outputs.
Represented in detail by truth table (Truth table) that in Fig. 4 the signal of being exported is with the annexation of analog multiplexer 210 internal wirings when current selected switch switches on and off.When current/voltage selector switch SW3 was disconnected, wiring S1, the S3 of analog multiplexer 210 was connected to wiring D1, D2.At this moment, first signal by 223 outputs of voltage amplification portion is passed to outlet terminal 230.When current/voltage selector switch SW3 was switched on, wiring S2, the S4 of analog multiplexer 210 was connected to wiring D1, D2.At this moment, the secondary signal by 224 outputs of electric current enlarging section is passed to outlet terminal.
As mentioned above, in the analog output circuit of Fig. 2 and desirable embodiment of the present invention shown in Figure 3, though it is similar with analog output circuit shown in Figure 1 that whole block diagram constitutes, yet in the present invention, after the digital signal that MPU is provided converts simulating signal to, the signal of conversion is passed to outlet terminal through multiplexer.Therefore, needn't be that voltage signal still is a current signal and exporting to the outside through each self-corresponding outlet terminal respectively according to the signal of being changed, but, optionally export from an outlet terminal by multiplexer.
When constituting when n terminal provides the analog output module of voltage signal and current signal, existing analog output module needs 2n outlet terminal, yet, in the present invention, only use n analog multiplexer and n outlet terminal to get final product.Therefore, analog output circuit of the present invention has the circuit that connects external unit and constitutes better simply advantage.In addition, when changing with external unit that analog output circuit is connected, prior art need reconfigure 2n wiring, and only need reconfigure n wiring according to the present invention, so has reduced change to connect up and the burden brought.Analog output module provided by the invention in circuit formation that keeps existing analog output module and function, can improve the efficient of wiring.In addition, significantly reduced the outlet terminal quantity that is configured on the analog output circuit, therefore, the miniaturization of the PLC circuit of analog output circuit of the present invention has been used in realization easily.
More than by representing embodiment that the present invention has been done detailed explanation, those of ordinary skill in the art is not in exceeding scope of the present invention, can carry out various deformation to the foregoing description, so embodiment that interest field of the present invention is not limited to illustrate, not only comprise claim scope of the present invention, also should comprise these distortion.
Claims (6)
1. analog output module has:
The signal transfer part, it provides input signal with first signal of voltage form or the secondary signal of current forms;
Outlet terminal, it will export the outside to by the signal that described signal transfer part is provided;
Analog multiplexer, it optionally offers described outlet terminal with described first signal or secondary signal.
2. analog output module as claimed in claim 1 is characterized in that also having:
The current/voltage selector switch, it provides control signal to make described analog multiplexer select described first signal or described secondary signal.
3. analog output module as claimed in claim 2 is characterized in that, described signal transfer part has:
Digital to analog converter, it provides after receiving described input signal and converting simulating signal to;
Voltage amplification portion, it will provide as described first signal after will amplifying from the voltage signal of described digital to analog converter; And
The electric current enlarging section, it will provide as described secondary signal after will amplifying from the current signal of described digital to analog converter.
4. analog output module as claimed in claim 3 is characterized in that also having:
Arithmetic processing apparatus, it will be corresponding to calculation process result's digital signal, provides as the input signal of described digital to analog converter.
5. analog output module as claimed in claim 4 is characterized in that, described signal transfer part also has:
Photoelectrical coupler, it makes between mimic channel portion and the described arithmetic processing apparatus and insulate, and this mimic channel portion comprises, described digital to analog converter, described voltage amplification portion and described electric current enlarging section.
6. analog output module as claimed in claim 3 is characterized in that, described analog multiplexer has:
The route diversion switch, it will offer described outlet terminal from first signal of described voltage amplification portion, perhaps will offer described outlet terminal by the secondary signal that described electric current enlarging section provides; And
Impact damper, it is exported as the control signal of described route diversion switch after control signal from described current/voltage selector switch is cushioned.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090044565A KR101024466B1 (en) | 2009-05-21 | 2009-05-21 | Analog output module |
| KR10-2009-0044565 | 2009-05-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101893868A true CN101893868A (en) | 2010-11-24 |
| CN101893868B CN101893868B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010185057.5A Active CN101893868B (en) | 2009-05-21 | 2010-05-20 | Analog output module |
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| KR (1) | KR101024466B1 (en) |
| CN (1) | CN101893868B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235547A (en) * | 2012-01-20 | 2013-08-07 | Ls产电株式会社 | Analog input and output module |
| CN103576643A (en) * | 2012-08-10 | 2014-02-12 | Ls产电株式会社 | HART analog input module with differential input stage |
| CN104810783A (en) * | 2014-01-27 | 2015-07-29 | Ls产电株式会社 | Analog current output module |
| CN106227182A (en) * | 2015-06-02 | 2016-12-14 | Ls 产电株式会社 | The output adjustment device of analog output module |
| CN110489366A (en) * | 2019-07-12 | 2019-11-22 | 苏州浪潮智能科技有限公司 | A kind of server master board connector signal multiplex system |
| CN113110279A (en) * | 2021-04-20 | 2021-07-13 | 中国长江电力股份有限公司 | PLC analog output module for remote anti-electromagnetic interference transmission of analog signal |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566484A (en) * | 2011-12-15 | 2012-07-11 | 无锡科思电子科技有限公司 | Multifunctional analog quantity acquisition module and information transmission method thereof |
| KR101326590B1 (en) * | 2012-03-27 | 2013-11-08 | 주식회사 케이디티 시스템즈 | Programmable logic controller using time division multiplexing |
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| KR19990069038A (en) * | 1998-02-04 | 1999-09-06 | 이종수 | Analog output module of PLC system |
| KR200352646Y1 (en) * | 2004-03-18 | 2004-06-05 | 엘지산전 주식회사 | Analog output module of plc system |
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2009
- 2009-05-21 KR KR1020090044565A patent/KR101024466B1/en active IP Right Grant
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2010
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Patent Citations (4)
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| CN2729787Y (en) * | 2004-09-08 | 2005-09-28 | 北京硕人时代科技有限公司 | Analog output card |
| CN1893280A (en) * | 2005-06-30 | 2007-01-10 | 英飞凌科技股份公司 | Multi-channel digital/analog converter arrangement |
| EP1956717A2 (en) * | 2007-02-12 | 2008-08-13 | ABB Oy | Signal interface circuit |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103235547A (en) * | 2012-01-20 | 2013-08-07 | Ls产电株式会社 | Analog input and output module |
| US10158505B2 (en) | 2012-01-20 | 2018-12-18 | Lsis Co., Ltd. | Analog input and output module |
| CN103576643A (en) * | 2012-08-10 | 2014-02-12 | Ls产电株式会社 | HART analog input module with differential input stage |
| US9178967B2 (en) | 2012-08-10 | 2015-11-03 | Lsis Co., Ltd. | HART analog input module with differential input stage |
| CN103576643B (en) * | 2012-08-10 | 2016-12-28 | Ls产电株式会社 | There is the HART Analog input mModule of differential input level |
| CN104810783A (en) * | 2014-01-27 | 2015-07-29 | Ls产电株式会社 | Analog current output module |
| CN106227182A (en) * | 2015-06-02 | 2016-12-14 | Ls 产电株式会社 | The output adjustment device of analog output module |
| US10120362B2 (en) | 2015-06-02 | 2018-11-06 | Lsis Co., Ltd. | Output adjustment device of analog output module |
| CN106227182B (en) * | 2015-06-02 | 2021-06-25 | Ls 产电株式会社 | Output regulator for analog output module |
| CN110489366A (en) * | 2019-07-12 | 2019-11-22 | 苏州浪潮智能科技有限公司 | A kind of server master board connector signal multiplex system |
| CN113110279A (en) * | 2021-04-20 | 2021-07-13 | 中国长江电力股份有限公司 | PLC analog output module for remote anti-electromagnetic interference transmission of analog signal |
| CN113110279B (en) * | 2021-04-20 | 2023-02-17 | 中国长江电力股份有限公司 | PLC analog output module for remote anti-electromagnetic interference transmission of analog signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101893868B (en) | 2014-03-19 |
| KR20100125719A (en) | 2010-12-01 |
| KR101024466B1 (en) | 2011-03-23 |
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