CN203800953U - M-BUS converter - Google Patents
M-BUS converter Download PDFInfo
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- CN203800953U CN203800953U CN201420169423.1U CN201420169423U CN203800953U CN 203800953 U CN203800953 U CN 203800953U CN 201420169423 U CN201420169423 U CN 201420169423U CN 203800953 U CN203800953 U CN 203800953U
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- 238000002955 isolation Methods 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims description 39
- 239000003990 capacitor Substances 0.000 claims description 32
- 230000009977 dual effect Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000001629 suppression Effects 0.000 claims description 9
- 230000001052 transient effect Effects 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000007812 deficiency Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000036039 immunity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model brings forward a meter bus (M-BUS) converter comprising a power supply module, an M-BUS module, an RS485 module, an ethernet network module, an RS232 module, and an isolation module. The M-BUS module consists of an M-BUS interface, an M-BUS host sending circuit, and an M-BUS receiving circuit. The RS485 module includes an RS485 interface chip that is respectively connected with the power supply module and the M-BUS module. The ethernet network module includes an ethernet interface chip that is respectively connected with the power supply module and the M-BUS module. The RS232 module includes an RS232 interface chip that is respectively connected with the power supply module and the M-BUS module. And the isolation module is used for carrying our protection isolation on equipment connected with the RS485 interface chip, the ethernet interface chip, and the RS232 interface chip. According to the scheme, data of instrument connected to the M-BUS unit are obtained directly based on the standard RS-232 interface and the two-wire system RS-485 interface or an ethernet interface by a pass-through way; and the converter can be applied to various engineering situations not requiring simultaneous existence of bus protocols like the M-BUS unit and the RS485 unit.
Description
Technical field
The utility model relates to M-BUS bussing technique field, particularly a kind of M-BUS transducer.
Background technology
M-Bus (Meter Bus) bus is called again customer meter bus, is a kind of high-quality bus designing for consuming class measuring instrument transmission information specially, aspect building and the collection of industrial energy consumption data, is having a wide range of applications.Its feature is that two transmission lines are nonpolarity, and topological performance is good, can connect according to any topological form, and bus can be powered, solved the essential deficiency that relies on Power supply of other buses, and M-Bus bus communication is reliable, strong interference immunity, has been widely used in various remote transmission instruments.
M-Bus (Meter Bus) bus is not the standard communication interface of the equipment such as computer, industrial computer, PLC, centralized automatic meter-reading device; and these equipment have Ethernet, RS-232 or RS-485 communication interface conventionally, M-Bus transducer (M-Bus Master Converter) can facilitate these equipment to connect the instrumentation with M-Bus bus by Ethernet, RS-232 or RS-485.
M-Bus (Meter Bus) bus is called again customer meter bus, is a kind of high-quality bus designing for consuming class measuring instrument transmission information specially, aspect building and the collection of industrial energy consumption data, is having a wide range of applications.Its feature is that two transmission lines are nonpolarity, and topological performance is good, can connect according to any topological form, and bus can be powered, solved the essential deficiency that relies on Power supply of other buses, and M-Bus bus communication is reliable, strong interference immunity, has been widely used in various remote transmission instruments.
M-Bus (Meter Bus) bus is not the standard communication interface of the equipment such as computer, industrial computer, PLC, centralized automatic meter-reading device; and these equipment have Ethernet, RS-232 or RS-485 communication interface conventionally, M-Bus transducer (M-Bus Master Converter) can facilitate these equipment to connect the instrumentation with M-Bus bus by Ethernet, RS-232 or RS-485.
M-Bus advantage is as follows:
(1) interface flexible: can realize the function that M-Bus bus is changed mutually to Ethernet, RS-485 or RS-232 simultaneously.
(2) strong adaptability: can by supporting arranging, software arrange M-Bus, RS-485, RS-232 is any baud rate, can meet the far distance instrument of variety classes and different manufacturers.
(3) main equipment can be used different baud rates from M-Bus bus.
(4) compatible strong: to support Europe superscript EN1434/EN13757 and Chinese Industrial Standards (CIS) CJ/T188 agreement simultaneously.
M-Bus defect is as follows:
(1) load capacity of M-Bus is limited, should not connect too much equipment, and the story height of nova community, resident family is many, and the many reasons of metered quantity of installation need to be used M-Bus repeater for some high buildings.
(2) for only using the user of simple function, can increase extra cost.
Utility model content
The purpose of this utility model is intended at least solve one of described technological deficiency.
For this reason, the purpose of this utility model is to propose a kind of M-BUS transducer, RS-232, two-wire system RS-485 interface or the Ethernet interface of this equipment by standard directly obtains and is connected to the instrumented data on M-Bus in the mode of transparent transmission, can be applied to multiple without the simultaneous project situation of bus protocol (M-BUS, RS485).
To achieve these goals, embodiment of the present utility model provides a kind of Communication Gateway equipment of M-BUS bus host end, comprising: power module; M-BUS module, described M-BUS module is connected with described power module, and wherein, described M-BUS module comprises: M-BUS interface, described M-BUS interface access M-BUS bus, wherein, is connected with a plurality of instrument in described M-BUS bus; M-BUS main frame transtation mission circuit, one end of described M-BUS main frame transtation mission circuit is connected with described power module, the other end is connected with M-BUS passage, wherein, described M-BUS main frame transtation mission circuit comprises: the first to the 6th resistance, wherein one end of the first resistance is connected with described power module, a termination M-BUS transmitted signal of the other end of described the first resistance and the second resistance; The first triode, the base stage of described the first triode is connected with the other end of described the second resistance, and grounded emitter is parallel with the 3rd resistance between the base stage of described the first triode and emitter, and the collector electrode of described the first triode connects one end of the 4th resistance; The first metal-oxide-semiconductor, the grid of the first metal-oxide-semiconductor is parallel with the 5th resistance between the other end of described the 4th resistance and the source electrode of described the first metal-oxide-semiconductor described in another termination of described the 4th resistance; The first diode, power module described in the anodal termination of described the first diode, the drain electrode of metal-oxide-semiconductor described in negative pole termination; Fuse, one end of described fuse is connected with the drain electrode of described metal-oxide-semiconductor; Bipolarity Transient Suppression Diode, described bipolarity Transient Suppression Diode is connected with the other end of described fuse, and at described bipolarity Transient Suppression Diode two ends, be parallel with the 6th resistance, the two ends of described the 6th resistance are connected to access described M-BUS bus with described M-BUS interface; M-BUS receiving circuit, one end of described M-BUS receiving circuit is connected with described power module, and the other end is connected with described M-BUS passage, wherein, described M-BUS receiving circuit comprises: two voltage comparator integrated circuits, and described pair of voltage ratio meets M-BUS compared with integrated circuit and receives signal; The first and second dual operational amplifiers, described the first dual operational amplifier and described the second dual operational amplifier cascade; RS485 module, described RS485 module comprises RS485 interface chip, described RS485 interface chip is connected with described M-BUS module with described power module respectively; Ethernet module, described ethernet module comprises Ethernet chip, described Ethernet chip is connected with described M-BUS module with described power module respectively; RS232 module, described RS232 module comprises RS232 interface chip, described RS232 interface chip is connected with described M-BUS module with described power module respectively; Isolation module, for carrying out protective separation to described RS485 interface chip, described Ethernet chip and the equipment that described RS232 interface chip is connected.
In an embodiment of the present utility model, described power module comprises: the first booster circuit, and described the first booster circuit comprises: the first booster type voltage-stabilizing controller, the power supply termination power supply signal of described the first booster type voltage-stabilizing controller; Little wire-wound inductor, power supply signal described in a termination of described little wire-wound inductor; The 9th resistance, one end of described the 9th resistance is connected with the output of described the first booster type voltage-stabilizing controller; The second metal-oxide-semiconductor, the grid of described the second metal-oxide-semiconductor is connected with the other end of described the 9th resistance, source class ground connection, drain electrode is connected with the other end of described little wire-wound inductor; The first Schottky diode, the forward end of described the first Schottky diode is connected with the other end of described little wire-wound inductor; The the tenth to the 12 resistance, one end of described the tenth resistance is connected with the backward end of described the first Schottky diode, one end of another termination the first electric capacity of described the tenth resistance, described the 11 resistance and described the tenth resistance and described the first Capacitance parallel connection, and the other end of described the first electric capacity is connected with one end of described the 12 resistance, the other end ground connection of described the 12 resistance; The first and second electrochemical capacitors, described the first electrochemical capacitor and described the second electrochemical capacitor are in parallel, wherein, the backward end of the first Schottky diode described in a termination of described the first and second electrochemical capacitors, other end ground connection; The second booster circuit, described the second booster circuit comprises: the second booster type voltage-stabilizing controller, the power supply termination power supply signal of described the second booster type voltage-stabilizing controller; Large wire-wound inductor, power supply signal described in a termination of described large wire-wound inductor; The 13 resistance, one end of described the 13 resistance is connected with the output of described the second booster type voltage-stabilizing controller; The 3rd metal-oxide-semiconductor, the grid of described the 3rd metal-oxide-semiconductor is connected with the other end of described the 13 resistance, source class ground connection, drain electrode is connected with the other end of described large wire-wound inductor; The second Schottky diode, the forward end of described the second Schottky diode is connected with the other end of described large wire-wound inductor; The the 14 to the 16 resistance, one end of described the 14 resistance is connected with the backward end of described the second Schottky diode, one end of another termination the second electric capacity of described the 14 resistance, described the 15 resistance and described the 14 resistance and described the second Capacitance parallel connection, and the other end of described the second electric capacity is connected with one end of described the 16 resistance, the other end ground connection of described the 16 resistance; The third and fourth electrochemical capacitor, described the 3rd electrochemical capacitor and described the 4th electrochemical capacitor are in parallel, wherein, the backward end of the second Schottky diode described in a termination of described the third and fourth electrochemical capacitor, other end ground connection.
In another embodiment of the present utility model, the reception differential signal end of described RS485 interface chip and transmission differential signal end are connected with respectively fuse, one end of input termination the 7th resistance of the driver of described RS485 interface chip, the positive terminal of another termination the second diode of described the 7th resistance, the base stage of negative pole termination second triode of described the second diode, the grounded emitter of described the second triode, collector electrode connects the 8th resistance.
In another embodiment of the present utility model, described the first metal-oxide-semiconductor, described the second metal-oxide-semiconductor and described the 3rd metal-oxide-semiconductor are P-channel enhancement type metal-oxide-semiconductor.
In another embodiment of the present utility model, also comprise: alternate serial port, described alternate serial port is connected with described RS232 interface chip.
According to the M-BUS transducer of the utility model embodiment, the signal between realization simultaneously and RS-485, RS-232, ethernet interface is changed mutually.Make main equipment access easily M-Bus bus by RS-232, RS-485 or the Ethernet interface of standard, communicate by letter mutually with the equipment in M-Bus bus.The utility model has been realized the analog-digital conversion function of physical layer; its built-in buffer circuit; can effectively protect M-Bus instrumentation and main equipment, at M-Bus end, carry out multiple protective and filtering processing, can provide M-Bus stable, that essential safety is extremely strong with antijamming capability to communicate by letter.The utility model is also supported the flexible setting to M-Bus, RS-485, RS-232 baud rate, has strengthened the scope of application of M-Bus transducer.
The aspect that the utility model is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is according to the structure chart of the M-BUS transducer of the utility model embodiment;
Fig. 2 is according to the schematic diagram of the M-BUS transducer of the utility model embodiment;
Fig. 3 is according to the circuit diagram of the power module of the utility model embodiment;
Fig. 4 is according to the circuit diagram of the M-BUS main frame transtation mission circuit of the utility model embodiment;
Fig. 5 is according to the circuit diagram of the M-BUS receiving circuit of the utility model embodiment;
Fig. 6 is according to the circuit diagram of the RS485 module of the utility model embodiment;
Fig. 7 is according to the circuit diagram of the ethernet module of the utility model embodiment;
Fig. 8 is according to the RS232 interface chip of the utility model embodiment and the circuit diagram of spare interface;
Fig. 9 is according to the configuration schematic diagram of the M-BUS transducer of the utility model embodiment.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
The M-BUS transducer of the utility model embodiment, it is a kind of Communication Gateway device that a kind of M-BUS of relating to bus, RS485 bus, RS232 and ICP/IP protocol can realize mutual conversion, the utility model can be linked in M-Bus bus easily by RS-232, RS-485 or the Ethernet interface of standard, realizes and communicating by letter mutually with the instrumentation in M-Bus bus.
As depicted in figs. 1 and 2, the M-BUS transducer of the utility model embodiment (MBUS Converter), comprising: power module 1, M-BUS module 2, RS485 module 3, ethernet module 4, RS232 module 5 and isolation module 6.
As shown in Figure 3, power module 1 comprises the first booster circuit and the second booster circuit.Particularly, the first booster circuit can boost to 24V by 12V, and wherein the first booster circuit comprises: the first booster type voltage-stabilizing controller U1, little wire-wound inductor L1, the 9th resistance R 3, the second metal-oxide-semiconductor QV1, the first Schottky diode D1, the tenth to the 12 resistance, the first and second electrochemical capacitors.The power end VCC of the first booster type voltage-stabilizing controller U1 meets power supply signal 12V, a termination power supply signal of little wire-wound inductor L1, one end of the 9th resistance R 3 is connected with the output OUT of the first booster type voltage-stabilizing controller, the grid G of the second metal-oxide-semiconductor is connected with the other end of the 9th resistance R 3, source class ground connection, drain electrode is connected with the other end of little wire-wound inductor L1.The forward end of the first Schottky diode D1 is connected with the other end of little wire-wound inductor L1, one end of the tenth resistance R 4 is connected with the backward end of the first Schottky diode D1, one end of another termination the first capacitor C 6 of the tenth resistance R 4, the 11 resistance R 5 is in parallel with the tenth resistance R 4 and the first capacitor C 6, and the other end of the first capacitor C 6 is connected with one end of the 12 resistance R 6, the other end ground connection of the 12 resistance R 6.The first electrochemical capacitor C7 and the second electrochemical capacitor C8 are in parallel, wherein, and the backward end of a termination first Schottky diode D1 of the first and second electrochemical capacitors, other end ground connection.Forward end output 24V voltage signal from electrochemical capacitor C7 and electrochemical capacitor C8.
The second booster circuit can boost to 36V by 12V, comprising: the second booster type voltage-stabilizing controller U3, large wire-wound inductor L2, the 13 resistance R 18, the 3rd metal-oxide-semiconductor QV2, the second Schottky diode D4, the 14 to the 16 resistance, the third and fourth electrochemical capacitor.The power end VCC of the second booster type voltage-stabilizing controller U3 meets power supply signal 12V, a termination power supply signal 12V of large wire-wound inductor L2, one end of the 13 resistance R 18 is connected with the output OUT of the second booster type voltage-stabilizing controller U3, the grid of the 3rd metal-oxide-semiconductor QV2 is connected with the other end of the 13 resistance R 18, source class ground connection, drain electrode is connected with the other end of large wire-wound inductor L2.The forward end of the second Schottky diode D4 is connected with the other end of large wire-wound inductor L2, one end of the 14 resistance R 19 is connected with the backward end of the second Schottky diode D4, one end of another termination the second capacitor C 14 of the 14 resistance R 19, the 15 resistance R 20 is in parallel with the 14 resistance R 19 and the second capacitor C 14, and the other end of the second capacitor C 14 is connected with one end of the 16 resistance R 21, the other end ground connection of the 16 resistance R 21.The 3rd electrochemical capacitor C15 and the 4th electrochemical capacitor C16 are in parallel, wherein, and the backward end of a termination second Schottky diode D4 of the third and fourth electrochemical capacitor, other end ground connection.
In an embodiment of the present utility model, the model of booster type voltage-stabilizing controller U1 and booster type voltage-stabilizing controller U3 is FP5138B.
M-BUS module 2 is connected with power module 1, and wherein, M-BUS module 2 comprises: M-BUS interface, M-BUS main frame transtation mission circuit and M-BUS receiving circuit.
M-BUS interface access M-BUS bus, is wherein connected with a plurality of instrument in M-BUS bus, has powerful instrument load capacity, 200 instrument of maximum energy load.
As shown in Figure 4, one end of M-BUS main frame transtation mission circuit is connected with power module 1, and the other end is connected with M-BUS passage.M-BUS main frame transtation mission circuit comprises: the first to the 6th resistance, the first triode Q1, the first metal-oxide-semiconductor Q2, the first diode D2, fuse F1 and bipolarity Transient Suppression Diode TVS1.Wherein, one end of the first resistance R 8 is connected with power module 1, a termination M-BUS transmitted signal MBUS_TX of the other end of the first resistance R 8 and the second resistance.The base stage B of the first triode Q1 is connected with the other end of the second resistance R 9, emitter E ground connection.The collector electrode C that is parallel with the 3rd resistance R 10, the first triode Q1 between the base stage B of the first triode Q1 and emitter E connects one end of the 4th resistance R 11.The grid of another termination the first metal-oxide-semiconductor Q2 of the 4th resistance C is parallel with the 5th resistance R 12 between the other end of the 4th resistance R 11 and the source electrode of the first metal-oxide-semiconductor Q2.The anodal termination power module 1 of the first diode D2, the drain electrode of negative pole termination the first metal-oxide-semiconductor Q2.One end of fuse F1 is connected with the drain electrode of the first metal-oxide-semiconductor Q2D.Bipolarity Transient Suppression Diode TVS1 is connected with the other end of fuse F1, and the two ends that are parallel with the 6th resistance R 14, the six resistance R 14 at bipolarity Transient Suppression Diode TVS1 two ends are connected with M-BUS interface with access M-BUS bus.
As shown in Figure 5, one end of M-BUS receiving circuit is connected with power module 1, and the other end is connected with M-BUS passage, and wherein, M-BUS receiving circuit comprises: two voltage comparator integrated circuit U4, the first dual operational amplifier U5 and the second dual operational amplifier U6.Wherein, two voltage ratios meet M-BUS compared with integrated circuit U4 and receive signal MBUS_RX, the first dual operational amplifier U5 and the second dual operational amplifier U6 cascade.In an example of the present utility model, the model of two voltage comparator integrated circuit U4 is LM393.The model of the first dual operational amplifier U5 and the second dual operational amplifier U6 is LM358.
At an embodiment of the present utility model, red, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and the 3rd metal-oxide-semiconductor are P-channel enhancement type metal-oxide-semiconductor.
As shown in Figure 6, RS485 module 3 comprises RS485 interface chip U7, and RS485 interface chip U7 is connected with M-BUS module 2 with power module 1 respectively.The reception differential signal end A of RS485 interface chip U7 and transmission differential signal end B are connected with respectively fuse, the input DI of the driver of RS485 interface chip connects one end of the 7th resistance R 40, the positive terminal of another termination second diode D13 of the 7th resistance R 40, the base stage of negative pole termination the second triode Q3 of the second diode D13, the grounded emitter of the second triode Q3, collector electrode connects the 8th resistance R 41.Wherein, the model of RS485 interface chip U7 is MAX485.
As shown in Figure 7, ethernet module 4 comprises Ethernet chip, and Ethernet chip is connected with described M-BUS module with described power module respectively.
When ethernet module 4 adopts Ethernet protocol to carry out communication, communication module comprises: microcontroller U3, Ethernet chip U4 and isolating transformer U7.Wherein, microcontroller U3 is connected with power module 1, and Ethernet chip U4 is connected with microcontroller U3 with power module 1, and isolating transformer U7 is connected with microcontroller U3 with power module 1, and isolating transformer U7 connects RJ45 interface.
In an embodiment of the present utility model, the model of microcontroller U3 is STM32F103C8, and the model of Ethernet chip U4 is DM9000A, and the model of isolating transformer U7 is H1260NL.
Isolation module 6 carries out protective separation for the equipment that RS485 interface chip, Ethernet chip and RS232 interface chip are connected, and can effectively protect the equipment that connects serial ports.And, at M-BUS end, carried out multiple protective and filtering processing, can provide M-BUS stable, that essential safety is extremely strong with antijamming capability to communicate by letter.
As shown in Figure 8, RS232 module 5 comprises RS232 interface chip, and RS232 interface chip is connected with M-BUS module 2 with power module 1 respectively.In an embodiment of the present utility model, M-BUS transducer of the present utility model also comprises: alternate serial port, alternate serial port is connected with RS232 interface chip.
Fig. 9 is according to the configuration schematic diagram of the M-BUS transducer of the utility model embodiment.
M-BUS transducer of the present utility model support configures RS485, M-BUS, Ethernet Configuration parameter by serial ports, has expanded the scope of application of equipment.Wherein, the server ip of the serial ports baud rate of M-Bus, RS-485, RS-232, check digit, position of rest, data bit, Ethernet and port numbers all can arrange flexibly.Signal by the utility model M-Bus bus simultaneously and between RS-485, RS-232, Ethernet interface is changed mutually.And the serial ports baud rate of M-Bus, RS-485, RS-232 can arrange flexibly, main equipment can be used different baud rates from M-Bus bus.
In order to transport safely, M-BUS transducer of the present utility model needs reasonably packing conventionally, is arranged in aluminium alloy casing, and there is fixing position, hole at both sides or two, facilitate user installation.
Below the pin definitions of each interface is described.
(1) up 232 interfaces, 3 binding posts, pin definitions is as table 1:
| G | R | T |
| 1 | 2 | 3 |
Table 1
(2) descending bus interface, 2 binding posts, pin definitions is as table 2:
| M-BUS1+ | M-BUS1- |
| 1 | 2 |
Table 2
(3) RS232, DB9 interface:
Daily record serial ports: output system operation information, facilitate user to debug, during use, just connect.
Management serial ports: for M-BUS transducer is managed, just connect during use.
(4) up RS485 interface, 2 binding posts, pin definitions is as table 3:
| RS485A | RS485B |
| 9 | 10 |
Table 4
(5) up Ethernet interface: RJ45 interface
Fig. 9 is according to the configuration schematic diagram of the M-BUS transducer of the utility model embodiment.The parameter setting of M-BUS transducer completes by device management software.
According to the utility model embodiment M-BUS transducer, relate to check meter, signal conversion, analog-to-digital conversion, energy monitor and MBUS bus field, M-Bus is to the signal of RS-485, RS-232, the Ethernet equipment M-Bus transducer of conversion mutually.Particularly, RS-232, two-wire system RS-485 interface or the Ethernet interface of the utility model by standard directly obtains and is connected to the instrumented data on M-Bus in the mode of transparent transmission, can be applied to multiple without the simultaneous project situation of bus protocol (M-BUS, RS485).M-BUS transducer of the present utility model has been realized the translation function of physical layer, realizes the signal conversion between M-Bus interface and RS-485, RS-232, Ethernet interface.The utility model can arrange serial ports and Ethernet flexibly, provides essential safety and antijamming capability extremely strong M-Bus interface.
Signal between the utility model realization simultaneously and RS-485, RS-232, ethernet interface is changed mutually.Make main equipment access easily M-Bus bus by RS-232, RS-485 or the Ethernet interface of standard, communicate by letter mutually with the equipment in M-Bus bus.The utility model has been realized the analog-digital conversion function of physical layer; its built-in buffer circuit; can effectively protect M-Bus instrumentation and main equipment, at M-Bus end, carry out multiple protective and filtering processing, can provide M-Bus stable, that essential safety is extremely strong with antijamming capability to communicate by letter.The utility model is also supported the flexible setting to M-Bus, RS-485, RS-232 baud rate, has strengthened the scope of application of M-Bus transducer.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in the situation that not departing from principle of the present utility model and aim in scope of the present utility model, modification, replacement and modification.Scope of the present utility model is extremely equal to and limits by claims.
Claims (5)
1. a M-BUS transducer, is characterized in that, comprising:
Power module;
M-BUS module, described M-BUS module is connected with described power module, and wherein, described M-BUS module comprises:
M-BUS interface, described M-BUS interface access M-BUS bus, wherein, is connected with a plurality of instrument in described M-BUS bus;
M-BUS main frame transtation mission circuit, one end of described M-BUS main frame transtation mission circuit is connected with described power module, and the other end is connected with M-BUS passage, and wherein, described M-BUS main frame transtation mission circuit comprises:
The first to the 6th resistance, wherein one end of the first resistance is connected with described power module, a termination M-BUS transmitted signal of the other end of described the first resistance and the second resistance;
The first triode, the base stage of described the first triode is connected with the other end of described the second resistance, and grounded emitter is parallel with the 3rd resistance between the base stage of described the first triode and emitter, and the collector electrode of described the first triode connects one end of the 4th resistance;
The first metal-oxide-semiconductor, the grid of the first metal-oxide-semiconductor is parallel with the 5th resistance between the other end of described the 4th resistance and the source electrode of described the first metal-oxide-semiconductor described in another termination of described the 4th resistance;
The first diode, power module described in the anodal termination of described the first diode, the drain electrode of metal-oxide-semiconductor described in negative pole termination;
Fuse, one end of described fuse is connected with the drain electrode of described metal-oxide-semiconductor;
Bipolarity Transient Suppression Diode, described bipolarity Transient Suppression Diode is connected with the other end of described fuse, and at described bipolarity Transient Suppression Diode two ends, be parallel with the 6th resistance, the two ends of described the 6th resistance are connected to access described M-BUS bus with described M-BUS interface;
M-BUS receiving circuit, one end of described M-BUS receiving circuit is connected with described power module, and the other end is connected with described M-BUS passage, and wherein, described M-BUS receiving circuit comprises:
Two voltage comparator integrated circuits, described pair of voltage ratio meets M-BUS compared with integrated circuit and receives signal;
The first and second dual operational amplifiers, described the first dual operational amplifier and described the second dual operational amplifier cascade;
RS485 module, described RS485 module comprises RS485 interface chip, described RS485 interface chip is connected with described M-BUS module with described power module respectively;
Ethernet module, described ethernet module comprises Ethernet chip, described Ethernet chip is connected with described M-BUS module with described power module respectively;
RS232 module, described RS232 module comprises RS232 interface chip, described RS232 interface chip is connected with described M-BUS module with described power module respectively;
Isolation module, for carrying out protective separation to described RS485 interface chip, described Ethernet chip and the equipment that described RS232 interface chip is connected.
2. M-BUS transducer as claimed in claim 1, is characterized in that, described power module comprises:
The first booster circuit, described the first booster circuit comprises:
The first booster type voltage-stabilizing controller, the power supply termination power supply signal of described the first booster type voltage-stabilizing controller;
Little wire-wound inductor, power supply signal described in a termination of described little wire-wound inductor;
The 9th resistance, one end of described the 9th resistance is connected with the output of described the first booster type voltage-stabilizing controller;
The second metal-oxide-semiconductor, the grid of described the second metal-oxide-semiconductor is connected with the other end of described the 9th resistance, source class ground connection, drain electrode is connected with the other end of described little wire-wound inductor;
The first Schottky diode, the forward end of described the first Schottky diode is connected with the other end of described little wire-wound inductor;
The the tenth to the 12 resistance, one end of described the tenth resistance is connected with the backward end of described the first Schottky diode, one end of another termination the first electric capacity of described the tenth resistance, described the 11 resistance and described the tenth resistance and described the first Capacitance parallel connection, and the other end of described the first electric capacity is connected with one end of described the 12 resistance, the other end ground connection of described the 12 resistance;
The first and second electrochemical capacitors, described the first electrochemical capacitor and described the second electrochemical capacitor are in parallel, wherein, the backward end of the first Schottky diode described in a termination of described the first and second electrochemical capacitors, other end ground connection;
The second booster circuit, described the second booster circuit comprises:
The second booster type voltage-stabilizing controller, the power supply termination power supply signal of described the second booster type voltage-stabilizing controller;
Large wire-wound inductor, power supply signal described in a termination of described large wire-wound inductor;
The 13 resistance, one end of described the 13 resistance is connected with the output of described the second booster type voltage-stabilizing controller;
The 3rd metal-oxide-semiconductor, the grid of described the 3rd metal-oxide-semiconductor is connected with the other end of described the 13 resistance, source class ground connection, drain electrode is connected with the other end of described large wire-wound inductor;
The second Schottky diode, the forward end of described the second Schottky diode is connected with the other end of described large wire-wound inductor;
The the 14 to the 16 resistance, one end of described the 14 resistance is connected with the backward end of described the second Schottky diode, one end of another termination the second electric capacity of described the 14 resistance, described the 15 resistance and described the 14 resistance and described the second Capacitance parallel connection, and the other end of described the second electric capacity is connected with one end of described the 16 resistance, the other end ground connection of described the 16 resistance;
The third and fourth electrochemical capacitor, described the 3rd electrochemical capacitor and described the 4th electrochemical capacitor are in parallel, wherein, the backward end of the second Schottky diode described in a termination of described the third and fourth electrochemical capacitor, other end ground connection.
3. M-BUS transducer as claimed in claim 1, it is characterized in that, the reception differential signal end of described RS485 interface chip and transmission differential signal end are connected with respectively fuse, one end of input termination the 7th resistance of the driver of described RS485 interface chip, the positive terminal of another termination the second diode of described the 7th resistance, the base stage of negative pole termination second triode of described the second diode, the grounded emitter of described the second triode, collector electrode connects the 8th resistance.
4. M-BUS transducer as claimed in claim 1, is characterized in that, described the first metal-oxide-semiconductor, described the second metal-oxide-semiconductor and described the 3rd metal-oxide-semiconductor are P-channel enhancement type metal-oxide-semiconductor.
5. M-BUS transducer as claimed in claim 1, is characterized in that, also comprises: alternate serial port, described alternate serial port is connected with described RS232 interface chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420169423.1U CN203800953U (en) | 2014-04-09 | 2014-04-09 | M-BUS converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420169423.1U CN203800953U (en) | 2014-04-09 | 2014-04-09 | M-BUS converter |
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| CN203800953U true CN203800953U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420169423.1U Expired - Lifetime CN203800953U (en) | 2014-04-09 | 2014-04-09 | M-BUS converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104679707A (en) * | 2015-03-11 | 2015-06-03 | 从兴技术有限公司 | M-bus interface circuit |
| CN106205101A (en) * | 2016-09-28 | 2016-12-07 | 申丽 | A kind of M BUS communication interface transducer for the most compatible Europe superscript agreement of centralized meter-reading system |
| CN107123252A (en) * | 2017-05-27 | 2017-09-01 | 南京林洋电力科技有限公司 | A kind of M BUS trailing frogs and its intelligent switching circuit |
| CN112068480A (en) * | 2020-09-08 | 2020-12-11 | 国网福建省电力有限公司 | Industrial wireless measurement and control terminal |
-
2014
- 2014-04-09 CN CN201420169423.1U patent/CN203800953U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104679707A (en) * | 2015-03-11 | 2015-06-03 | 从兴技术有限公司 | M-bus interface circuit |
| CN104679707B (en) * | 2015-03-11 | 2018-03-13 | 从兴技术有限公司 | A kind of M Bus interface circuits |
| CN106205101A (en) * | 2016-09-28 | 2016-12-07 | 申丽 | A kind of M BUS communication interface transducer for the most compatible Europe superscript agreement of centralized meter-reading system |
| CN107123252A (en) * | 2017-05-27 | 2017-09-01 | 南京林洋电力科技有限公司 | A kind of M BUS trailing frogs and its intelligent switching circuit |
| CN112068480A (en) * | 2020-09-08 | 2020-12-11 | 国网福建省电力有限公司 | Industrial wireless measurement and control terminal |
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