CN201450499U - Field bus access device - Google Patents
Field bus access device Download PDFInfo
- Publication number
- CN201450499U CN201450499U CN2009200430555U CN200920043055U CN201450499U CN 201450499 U CN201450499 U CN 201450499U CN 2009200430555 U CN2009200430555 U CN 2009200430555U CN 200920043055 U CN200920043055 U CN 200920043055U CN 201450499 U CN201450499 U CN 201450499U
- Authority
- CN
- China
- Prior art keywords
- converter
- access device
- input
- output
- fieldbus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
Abstract
The utility model discloses a field bus access device which comprises an electric current isolator (1), an isolation temperature transmitter (2), an electric current commutator (3), a voltage converter (4), a switching value input/output adaptor (5), a frequency converter (6), a power source (7) and related auxiliary circuits (8), wherein the auxiliary circuits (8) comprise a bus AB, a terminal resistance R and a switch K; the power source (7) supplies power to the isolator, the transmitter and the converters; by the bus AB, the field bus access device converts related signals, and is then accessed into an Modbus field bus network to realize distributed management and control, and can save a mass of wires and reduce the economic cost of the system and the implementary difficulty of the engineering.
Description
Technical field
The utility model relates to a kind of field-bus interface apparatus field, specifically, is a kind of fieldbus access device.
Background technology
Fieldbus is a kind of industry data bus, digital communication between field apparatuss such as the intelligent instrumentation at its scene of mainly solving, controller, actuator and the information problem of transmission between these field apparatuss and the upper strata control system.Series of advantages such as it is simple, reliable, economical and practical that fieldbus has.It becomes one of focus of current automatic field technical development.
In recent years, support that the intelligence instrument of fieldbus is increasing, field bus control system is used more and more wider.But the actual industrial scene also exists a large amount of conventional instruments only can provide as multiple non-bus type signals such as switch, pulse, thermal resistance (idol), normalized current and voltages.These non-bus signals have the direct instrument of a transmission lines, signal of one-way transmission; Be subject to interference, the low poor reliability of transmission precision; Install, transform complexity, shortcomings such as operating expenses height.
It is significant that these non-bus type signals are converted into fieldbus signal: a pair of transmission line can connect N platform instrument, a plurality of signals of transmitted in both directions; Improve the observing and controlling precision, reduced the transmission error; Constitute a kind of architecture of complete dispersed control system newly; Save a large amount of leads, reduction systematic economy cost and engineering construction difficulty.
Summary of the invention
The purpose of this utility model is the multiple non-bus type signals such as switch, pulse, thermal resistance (idol), normalized current and voltage that exist in a large number at present, design a kind of fieldbus access device, by this device, the convenient Modbus fieldbus networks that inserts of multiple non-bus type signal is realized distributed observing and controlling; Save a large amount of leads, reduction systematic economy cost and engineering construction difficulty.
The utility model adopts following technical scheme for achieving the above object:
Fieldbus access device of the present utility model comprises galvanic separation, isolated temperature transmitter, current converter, electric pressure converter, switching value input/output converter, frequency converter, power supply and auxiliary circuit composition; Wherein the input of galvanic separation links to each other with the external perimysium reference current signal, the input of isolated temperature transmitter links to each other with the external heat resistance signal, and the output of the output of galvanic separation, isolated temperature transmitter links to each other with the input of current converter respectively; The input of electric pressure converter links to each other with the external perimysium reference voltage signal, and the input of switching value input/output converter links to each other with outside input amount, and the input of frequency converter links to each other with the external pulse signal; The output of current converter, electric pressure converter, switching value input/output converter and frequency converter is connected with the bus AB of auxiliary circuit respectively; Power supply is all isolators, transmitter and transducer power supply.
Further, fieldbus access device of the present utility model, described auxiliary circuit is made up of with the terminal resistance R, the K switch that are connected across on the bus AB bus AB.
Further, fieldbus access device of the present utility model, the output of described current converter, electric pressure converter, switching value input/output converter and frequency converter link to each other with bus AB in the auxiliary circuit respectively.
Further, fieldbus access device of the present utility model, when the fieldbus access device was not in Modbus fieldbus networks terminal, the K switch in the described auxiliary circuit should disconnect.
Further, fieldbus access device of the present utility model, when the fieldbus access device was in Modbus fieldbus networks terminal, the K switch in the described auxiliary circuit should be closed.
Beneficial effect
The utility model adopts technique scheme, compared with prior art has following advantage:
The utility model can be realized multiple non-bus type Signal Spacing such as switch, pulse, thermal resistance (idol), normalized current and voltages, be converted into unified fieldbus signal; By this device, the convenient fieldbus networks that inserts of multiple non-bus type signal is realized distributed observing and controlling.Can save a large amount of leads, reduction systematic economy cost and engineering construction difficulty.
Description of drawings
Fig. 1 is an electrical structure schematic diagram of the present utility model.
Fig. 2 is that bus network of the present utility model inserts schematic diagram.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
As shown in Figure 1, a kind of fieldbus access device, it is mainly by mainly being made up of galvanic separation 1 (model can be CZ2067), isolated temperature transmitter 2 (model can be CZ2271), current converter 3 (model can be RemoDAQ8017SC), electric pressure converter 4 (model can be RemoDAQ8017SV), switching value input/output converter 5 (model can be RemoDAQ8065), frequency converter 6 (model can be RemoDAQ8080), power supply 7 and relevant auxiliary circuit 8; Power supply 7 is each isolation and modular converter power supply, and auxiliary circuit 8 comprises bus AB, terminal resistance R and K switch.The input of galvanic separation 1 links to each other with the external perimysium reference current signal, and the output of galvanic separation 1 links to each other with the input of current converter 3; The input of isolated temperature transmitter 2 links to each other with external heat resistance (idol) signal, and the output of isolated temperature transmitter 2 links to each other with the input of current converter 3; The input of electric pressure converter 4 links to each other with the external perimysium reference voltage signal, and the input of switching value input/output converter 5 links to each other with outside input amount, and the input of frequency converter 6 links to each other with the external pulse signal; Current converter 3, electric pressure converter 4, switching value input/output converter 5 and frequency converter 6 are converted to behind the Modbus bus signals cross-over connection separately with corresponding electric current, voltage, switching value input and output and frequency signal and export on the bus AB in the auxiliary circuit 8; By bus AB, the fieldbus access device transforms the back with coherent signal and inserts the Modbus fieldbus networks.
As shown in Figure 2, when a plurality of fieldbus access devices insert the Modbus fieldbus networks, when if the fieldbus access device is in Modbus fieldbus networks terminal, K switch should be closed in its auxiliary circuit 8, be in order to absorb reflected signal like this, avoid signal reflex, strengthen communication stability.Otherwise being in the auxiliary circuit 8 of fieldbus access device of nonterminal K switch should open, and makes communication smooth and easy.
Claims (5)
1. a fieldbus access device is characterized in that: comprise galvanic separation (1), isolated temperature transmitter (2), current converter (3), electric pressure converter (4), switching value input/output converter (5), frequency converter (6), power supply (7) and auxiliary circuit (8); Wherein the input of galvanic separation (1) links to each other with the external perimysium reference current signal, the input of isolated temperature transmitter (2) links to each other with the external heat resistance signal, and the output of the output of galvanic separation (1), isolated temperature transmitter (2) links to each other with the input of current converter (3) respectively; The input of electric pressure converter (4) links to each other with the external perimysium reference voltage signal, and the input of switching value input/output converter (5) links to each other with outside input amount, and the input of frequency converter (6) links to each other with the external pulse signal; The output of current converter (3), electric pressure converter (4), switching value input/output converter (5) and frequency converter (6) is connected with auxiliary circuit (8) respectively; Power supply (7) is all isolators, transmitter and transducer power supply.
2. fieldbus access device according to claim 1 is characterized in that: described auxiliary circuit (8) is made up of with the terminal resistance R, the K switch that are connected across on the bus AB bus AB.
3. fieldbus access device according to claim 1 is characterized in that: the output of described current converter (3), electric pressure converter (4), switching value input/output converter (5) and frequency converter (6) is connected with bus AB in the auxiliary circuit (8) respectively.
4. fieldbus access device according to claim 2 is characterized in that: when the fieldbus access device was not in Modbus fieldbus networks terminal, the K switch in the described auxiliary circuit (8) should disconnect.
5. fieldbus access device according to claim 2 is characterized in that: when the fieldbus access device was in Modbus fieldbus networks terminal, the K switch in the described auxiliary circuit (8) should be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200430555U CN201450499U (en) | 2009-06-29 | 2009-06-29 | Field bus access device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200430555U CN201450499U (en) | 2009-06-29 | 2009-06-29 | Field bus access device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201450499U true CN201450499U (en) | 2010-05-05 |
Family
ID=42555222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200430555U Expired - Fee Related CN201450499U (en) | 2009-06-29 | 2009-06-29 | Field bus access device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201450499U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102387059A (en) * | 2011-10-25 | 2012-03-21 | 中国西电电气股份有限公司 | Method and device for carrying out automatic matching on field bus terminals |
| CN102761008A (en) * | 2011-04-25 | 2012-10-31 | 上海熊猫机械(集团)有限公司 | Novel intelligent switch bus connector |
-
2009
- 2009-06-29 CN CN2009200430555U patent/CN201450499U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761008A (en) * | 2011-04-25 | 2012-10-31 | 上海熊猫机械(集团)有限公司 | Novel intelligent switch bus connector |
| CN102387059A (en) * | 2011-10-25 | 2012-03-21 | 中国西电电气股份有限公司 | Method and device for carrying out automatic matching on field bus terminals |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102096407B (en) | Chain type STATCOM control system based on EtherCA technology | |
| CN203894319U (en) | Isolation sampling system | |
| CN203466798U (en) | Serial-port switching device based on electronic switch | |
| CN111175601A (en) | Modular functional test system | |
| CN112202571A (en) | POE power transmission device, POE switch and POE system | |
| CN201450499U (en) | Field bus access device | |
| CN103713563A (en) | Megawatt converter parallel control method and system | |
| CN101951160A (en) | Cascade module control system | |
| CN205249666U (en) | Converter controller | |
| CN103218005A (en) | Intelligent power plate based on microcomputer | |
| CN202711112U (en) | Microcontroller-based intelligent power board | |
| CN202906930U (en) | POE power supply system based on multi-network distribution of cat5 cables | |
| CN102243481B (en) | Device, method and circuit for realizing interconnection between modules powered by different power supplies | |
| CN220108002U (en) | PSE power supply equipment special for rail transit | |
| CN201600574U (en) | Vehicular logic control unit for realizing interchange of inserts | |
| CN201255832Y (en) | Multipath signal selection apparatus for redundant control system | |
| CN206133271U (en) | Stage equipment switched systems based on PLC control | |
| CN201096833Y (en) | Photoelectric mutual inductor merger with analog interface | |
| CN202841126U (en) | Power serial server device with exchange function | |
| CN220120907U (en) | Low-voltage intelligent capacitor joint debugging testing device | |
| CN217360607U (en) | Computer lab power environment monitored control system | |
| CN203732921U (en) | Megawatt converter parallel control system | |
| CN204389994U (en) | A kind of node apparatus for RS422 bus | |
| CN215833794U (en) | Ethernet controlled 8-way switching value output circuit | |
| CN203466789U (en) | Through-flow coupler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20130629 |