CN202548567U - MBUS (Meter-Bus) main control data transmitting circuit - Google Patents
MBUS (Meter-Bus) main control data transmitting circuit Download PDFInfo
- Publication number
- CN202548567U CN202548567U CN2012200159692U CN201220015969U CN202548567U CN 202548567 U CN202548567 U CN 202548567U CN 2012200159692 U CN2012200159692 U CN 2012200159692U CN 201220015969 U CN201220015969 U CN 201220015969U CN 202548567 U CN202548567 U CN 202548567U
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- mbus
- control data
- adjustable
- bus
- electronic switch
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Abstract
The utility model relates to a MBUS (Meter-Bus) main control data transmitting circuit which comprises an adjustable three-terminal regulator. An input terminal of the adjustable three-terminal regulator is connected with a positive electrode of a power module, an output terminal of the adjustable three-terminal regulator is connected with one end of a MBUS, the other end of the MBUS is grounded, a regulating terminal of the three-terminal regulator is grounded through an adjustable resistance device controlled by an electronic switch, and a control end of the electronic switch is connected to a serial port transmitting end. The circuit is simple in structure and high in driving capability.
Description
Technical field
The utility model relates to the far distance instrument power supply and unlimited meter-copy collector, especially simple and reliable MBUS master control transmission circuit of long-range table system.
Background technology
MBUS, full name Meter-Bus is to be designed to consume energy the data bus that measurement instrument transmits specially, is a kind of European standard that is used for the far distance instrument reading of data.The MBUS major advantage is only to realize simultaneously power supply and transmitting serial data with two nonpolarity transmission lines, and each substation is connected in parallel on the MBUS bus.Utilize MBUS can simplify the wiring of residential quarters and energy consumption intellectualized management systems such as office space greatly and be connected, and have simple in structure, cheap, the reliability advantages of higher.
Adopt the variation of magnitude of voltage to represent by concentrator to the signal of end instrument terminal transmission according to the MBUS agreement; Be that concentrator is a kind of sequence of voltage pulses to the data code flow that end instrument sends; With+31 V presentation logic one states, usefulness+22V presentation logic " 0 " (transtation mission circuit).
Send the end instrument terminal by the end instrument terminal to concentrator and represent to be a kind of current pulse sequence to the data code flow that concentrator sends promptly by the end instrument terminal to the variation of the signal employing current value of concentrator transmission; Common current value presentation logic " 1 " with 1.5 mA; When transmission " 0 ", can make current value increase by 11～20 mA by the control of end instrument terminal.When stable state, the one state of the value on the circuit for continuing.When the end instrument terminal received signal, its electric current should be in stable state " 1 " (accepting circuit), and when receiving signal, the electric current that variation caused of its magnitude of voltage changes should not surpass 0.2%/V.
At present, MBUS governor circuit structure is complicated, poor reliability.
The utility model content
The purpose of the utility model provides a kind of MBUS major control data transtation mission circuit, in order to solve the problem of existing MBUS governor circuit complex structure, poor reliability.
For realizing above-mentioned purpose; The scheme of the utility model is: a kind of MBUS major control data transtation mission circuit; Comprise a three-port variable voltage regulator; It is anodal that the input end of this three-port variable voltage regulator connects power module, and the output terminal of three-port variable voltage regulator connects an end of MBUS bus, the other end ground connection of MBUS bus; The adjustable side of three-port variable voltage regulator is through an adjustable resistor device ground connection that is controlled by electronic switch, and the control end of said electronic switch is connected to the serial ports transmitting terminal.
Said adjustable resistor device comprises two resistance that are connected the three-port variable voltage regulator adjustable side, a resistance eutral grounding, and another resistance is through said electronic switch ground connection.
Said electronic switch is a triode, and its base stage connects said serial ports transmitting terminal.
The cathode voltage of said power module is 33V; Said adjustable voltage stabilizer output 31V or 22V.
Said MBUS bus is provided with fuse.
The MBUS major control data transtation mission circuit of the utility model utilizes adjustable voltage stabilizer to produce required voltage, and voltage is stable; Utilize electronic switch, make serial ports send the output that signal can be controlled adjustable voltage stabilizer; Circuit structure is simple, and reliability is high.
Description of drawings
Fig. 1 is a MBUS major control data transtation mission circuit block diagram;
Fig. 2 is a MBUS major control data transtation mission circuit schematic diagram;
Fig. 3 is a kind of MBUS major control data receiving circuit block diagram;
Fig. 4 is a MBUS major control data receiving circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
A kind of MBUS major control data transtation mission circuit as shown in Figure 1; Comprise a three-port variable voltage regulator; It is anodal that the input end of this three-port variable voltage regulator connects power module; The utility model adopts 33V, and the output terminal of three-port variable voltage regulator connects an end of MBUS bus, the other end ground connection of MBUS bus; The adjustable side of three-port variable voltage regulator is through an adjustable resistor device ground connection that is controlled by electronic switch, and the control end of said electronic switch is connected to the serial ports transmitting terminal.
Like Fig. 2 is physical circuit, three-port variable voltage regulator U6, output terminal OUT; Input end IN; Adjustable side ADJ, adjustable resistor device comprises two resistance that are connected three-port variable voltage regulator U6 adjustable side, resistance R 9 ground connection; Another resistance R 8 is through a triode Q1 ground connection, and triode Q1 base stage connects serial ports transmitting terminal TX.
Triode Q1 saturation conduction when TX sends high level, R8 ground connection, the voltage of regulating circuit output 22V; Both slave computer was accepted high level; When TX sends low level triode Q1 by, R8 is earth-free, thus the output voltage that changes adjustable voltage stabilizer U6 is with the clamp bus voltage.
In addition, the utility model gives receiving circuit embodiment.
MBUS data receiver circuit as shown in Figure 3; MBUS bus one end ground connection; The other end is through a stabilivolt and a pull-up resistor ground connection; Be parallel with one group of diode in series group and a resistance capacitance delay cell on the pull-up resistor, the diode cathode near pull-up resistor in the said diode group connects pull-up resistor; Diode group two ends connect two input ends of an operational amplifier respectively; The in-phase input end of operational amplifier connects the positive pole of said diode group; Inverting input connects said diode group negative pole, and the output terminal of operational amplifier connects the serial data receiving end.
Shown in Figure 4 is physical circuit, and the diode group is made up of two diode D1, D2 series connection, and diode D1, D2 also are in series with resistance R 2, and resistance capacitance delay cell is parallel resistor R3 and electric capacity.It is anodal that the operational amplifier in-phase input end connects diode D1, inverting input connection delay unit (MBUSIN).
When slave computer (on the bus) does not have information to send, under stable state because diode D1, the D2 forward bias, so the in-phase end voltage of discharge circuit U5 greater than end of oppisite phase voltage, RX exports high level.According to the MBUS agreement, when the slave computer transmission is " 0 ", a 20mA ascending current is arranged, the positive pole of D1 just has a voltage drop like this; D1 when selecting suitable resistance value R4, the cathode voltage of D2 will be less than cathode voltages, thus D1; The D2 reverse bias and by, so enough big R3, D1; D2 can guarantee the certain hour reverse bias, because D1, the end of oppisite phase voltage of discharge circuit is greater than in-phase end voltage during the D2 reverse bias.So the low level of discharge circuit output certain hour when slave computer sends " 1 ", is got back to former incoming current again, the D1 cathode voltage rises rapidly, thus rapid forward conduction, and amplifier is exported high level again.The MBUS bus is provided with fuse (thermistor PTC1), is provided with voltage dependent resistor (VDR) YM3 and stabilivolt Z2 between the bus two ends.
Send and MBUS-serial ports interconnecting module of receiving circuit formation, if increase serial ports-bluetooth module, then can also form MBUS-bluetooth interconnecting module, thereby realize wireless data transmission.
Claims (5)
1. MBUS major control data transtation mission circuit; It is characterized in that, comprise a three-port variable voltage regulator, it is anodal that the input end of this three-port variable voltage regulator connects power module; The output terminal of three-port variable voltage regulator connects an end of MBUS bus, the other end ground connection of MBUS bus; The adjustable side of three-port variable voltage regulator is through an adjustable resistor device ground connection that is controlled by electronic switch, and the control end of said electronic switch is connected to the serial ports transmitting terminal.
2. a kind of MBUS-serial ports conversion equipment according to claim 1 is characterized in that said adjustable resistor device comprises two resistance that are connected the three-port variable voltage regulator adjustable side, a resistance eutral grounding, and another resistance is through said electronic switch ground connection.
3. a kind of MBUS major control data transtation mission circuit according to claim 2 is characterized in that said electronic switch is a triode, and its base stage connects said serial ports transmitting terminal.
4. a kind of MBUS major control data transtation mission circuit according to claim 1 is characterized in that the cathode voltage of said power module is 33V; Said adjustable voltage stabilizer output 31V or 22V.
5. a kind of MBUS major control data transtation mission circuit according to claim 1 is characterized in that said MBUS bus is provided with fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200159692U CN202548567U (en) | 2012-01-14 | 2012-01-14 | MBUS (Meter-Bus) main control data transmitting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200159692U CN202548567U (en) | 2012-01-14 | 2012-01-14 | MBUS (Meter-Bus) main control data transmitting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202548567U true CN202548567U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200159692U Expired - Fee Related CN202548567U (en) | 2012-01-14 | 2012-01-14 | MBUS (Meter-Bus) main control data transmitting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202548567U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728951A (en) * | 2014-01-06 | 2014-04-16 | 深圳市兴源智能仪表科技有限公司 | Current regulative diode circuit of meter bus slave interface |
-
2012
- 2012-01-14 CN CN2012200159692U patent/CN202548567U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728951A (en) * | 2014-01-06 | 2014-04-16 | 深圳市兴源智能仪表科技有限公司 | Current regulative diode circuit of meter bus slave interface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20130114 |