CN207909118U - A kind of M-bus channel selection circuits - Google Patents
A kind of M-bus channel selection circuits Download PDFInfo
- Publication number
- CN207909118U CN207909118U CN201820221530.2U CN201820221530U CN207909118U CN 207909118 U CN207909118 U CN 207909118U CN 201820221530 U CN201820221530 U CN 201820221530U CN 207909118 U CN207909118 U CN 207909118U
- Authority
- CN
- China
- Prior art keywords
- circuit
- channel
- effect tube
- field
- resistance
- 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.)
- Active
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A kind of M bus channel selection circuits, including microprocessor, telecommunication circuit, control signal circuit and at least two paths switch protecting circuit；Microprocessor is connected with telecommunication circuit, control signal circuit respectively by microprocessor control interface；Channel switch protects the front end connection communication circuit and control signal circuit of circuit, rear end connection to wait for meter reading meter；Control signal circuit includes relay, triode, single-phase diode；Single-phase diode is in parallel with capacitance；The base stage of triode connects the Single port of microprocessor control interface through resistance；The anode of the collector connection diode of triode, while being connected to the coil cathode of relay；The cathode of diode is connected to the coil electrode of relay；At least contact switch of the two paths switch protecting circuit through relay be with being connected to external power supply.On the one hand the utility model has saved the port resource of microprocessor；On the other hand the cost of investment of administrative department is reduced.
Description
Technical field
The utility model is related to intelligent meter data recording technical field, more particularly to a kind of M-bus channel selection circuits.
Background technology
The most reliable communication mode of the distant communication mode as meter remote monitoring and control is used at family all the time
It is widely used on meter and acquisition terminal, and the load capacity of equipment is related to the safety and reliability of communication, with
And the cost of investment of administrative department.The meter quantity that each channel is acquired in collecting device all has certain limitations, existing at present
There are following defects for telecommunication circuit：One, when needing more downlink meters of copy reading in scene, need more collecting devices that could expire
Foot requires；Two, using more collecting devices, the cost of investment of administrative department is increased；Three, due to using more collecting devices,
It is subsequent to connect up, safeguard, taking electricity aspect all be with many troubles.Therefore how to ensure what live copy reading meter was met the requirements
In the case of, make the network minimal of investment, so that collecting device is utilized as current urgent problem to be solved.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of reliable and stable, cost-effective M-
Bus channel selection circuits.
A kind of M-bus channel selection circuits provided by the utility model, including microprocessor, telecommunication circuit, control signal
Circuit and at least two paths switch protecting circuit；The microprocessor by microprocessor control interface respectively with communicate electricity
Road, control signal circuit are connected；Channel switch protects the front end connection communication circuit and control signal circuit of circuit, rear end connection
Wait for meter reading meter；The control signal circuit includes relay, triode, single-phase diode；Single-phase diode is in parallel with capacitance；Three
The base stage of pole pipe connects the Single port of microprocessor control interface through resistance；The anode of the collector connection diode of triode,
It is connected to the coil cathode of relay simultaneously；The cathode of diode is connected to the coil electrode of relay；At least two paths are opened
Close contact switch of the protection circuit through relay with being connected to external power supply.
Further, the channel switch protection circuit includes channel switching circuit and access port protection circuit, and channel is opened
The front end connection communication circuit and control signal circuit on powered-down road, rear end interface channel port protection circuit, access port protection
Circuit connection waits for meter reading meter.
Further, the channel switch protection circuit includes two-way, i.e. 1 switching circuit of channel, 1 port protection circuit of channel
And 2 switching circuit of channel, 2 port protection circuit of channel.
Further, normally-closed contact of 1 switching circuit of the channel through relay be with being connected to external power supply；Channel 2 switchs
Normally opened contact of the circuit through relay is with being connected to external power supply.
Further, the telecommunication circuit include Phototube Coupling integrate circuit, the first field-effect tube, the first single-phase diode,
Second single-phase diode and a series of resistance；Phototube Coupling integrates 1 foot of circuit through the internal electric source of resistance connection microprocessor
VCC；2 feet that Phototube Coupling integrates circuit connect microprocessor control interface；3 feet that Phototube Coupling integrates circuit connect first
The grid of effect pipe, 4 feet that Phototube Coupling integrates circuit connect the source electrode phase of the first field-effect tube, and are connected to external power supply
VCC2；The drain of first field-effect tube Q1 is connected with the anode of the second single-phase diode respectively；The cathode of second single-phase diode
It is connected with the cathode of the first single-phase diode, and is connected to channel switch protection circuit；The anode connection of first single-phase diode
To external power supply VCC3.
Further, the access port protection circuit includes thermistor, transient suppressor and a series of resistance；Temperature-sensitive electricity
Resistance 1 foot be connected with 2 feet of transient suppressor, 1 foot of transient suppressor through resistance with connecing external power supply, the 1 of transient suppressor
Foot is also connected with the cathode port for waiting for meter reading meter, and resistance, temperature-sensitive electricity are connected between 2 feet of thermistor and 1 foot of transient suppressor
2 feet of resistance are also connected with the positive port for waiting for meter reading meter.
Further, the channel switching circuit includes the second field-effect tube and a series of resistance；The grid of second field-effect tube
Pole connects control signal circuit through resistance；The output end of the source electrode connection communication circuit of second field-effect tube；Second field-effect tube
Drain resistance grounded, the drain of the second field-effect tube is also connected with the input terminal of access port protection circuit.
Further, first field-effect tube uses the field-effect tube of P-channel.
Further, second field-effect tube uses the field-effect tube of P-channel.
The utility model has at least the following advantages：On the one hand the port resource of microprocessor has been saved, it is only necessary to all the way
Port control signal just can control the meter reading of two paths；On the other hand the cost of investment for reducing administrative department, is not increasing
In the case of collecting device, meter reading it is more.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
Carefully it is described as follows.
Description of the drawings
Fig. 1 is the circuit structure block diagram of the utility model embodiment；
Fig. 2 is the circuit diagram of the utility model embodiment microprocessor control interface；
Fig. 3 is the circuit diagram of the utility model embodiment telecommunication circuit；
Fig. 4 is the circuit diagram of the utility model embodiment control signal circuit；
Fig. 5 is the circuit diagram of 1 port protection circuit of 1 switching circuit of the utility model embodiment channel and channel；
Fig. 6 is the circuit diagram of 2 port protection circuit of 2 switching circuit of the utility model embodiment channel and channel.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
As depicted in figs. 1 and 2：A kind of M-bus channel selection circuits, including microprocessor control interface P1, telecommunication circuit,
Control signal circuit, 1 switching circuit of channel, 1 port protection circuit of channel, 2 switching circuit of channel and 2 port protection of channel electricity
Road.Wherein, microprocessor control interface is connected with telecommunication circuit, control signal circuit respectively；Telecommunication circuit is opened with channel 1 respectively
Powered-down road, 2 switching circuit of channel are connected；1 switching circuit front end connection communication circuit of channel and control signal circuit, rear end with it is logical
1 port protection circuit of road is connected；2 switching circuit front end connection communication circuit of channel and control signal circuit, rear end and 2 end of channel
Mouth protection circuit is connected；1 port protection circuit of channel and 2 port protection circuit rear end of channel, which are separately connected, corresponding waits for meter reading
Meter.
As shown in Figure 3：Telecommunication circuit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4,
One Phototube Coupling integrates circuit U 1, the first field-effect tube Q1, the first single-phase diode D1, the second single-phase diode D2.First electricity
Hindering the internal electric source VCC of R1 one end connection microprocessor, the other end connects 1 foot that the first Phototube Coupling integrates circuit U 1, and first
Phototube Coupling integrates 3 feet of the 2 feet connection microprocessor control interface P1 of circuit U 1；First Phototube Coupling integrates the 3 of circuit U 1
Foot is connected with second resistance R2 and 3rd resistor R3 respectively, and is connected to the grid of the first field-effect tube Q1,3rd resistor R3's
One end of the other end and the 4th resistance R4 are connected, and with being connected to external power supply, the first Phototube Coupling integrate 4 feet of circuit U 1 with
The source electrode of the other end of second resistance R2 and the first field-effect tube Q1 are connected, and are connected to external power supply VCC2；First field-effect
The drain of pipe Q1 is connected with the other end of the anode of the second single-phase diode D2, the 4th resistance R4 respectively；Second single-phase diode
The cathode of D2 is connected with the cathode of the first single-phase diode D1, and is connected to 2 switching circuit of 1 switching circuit of channel and channel, the
The anode of one single-phase diode D1 is connected to external power supply VCC3.
As shown in Figure 4：Control signal circuit includes the 8th resistance R8, third single-phase diode D3, the first capacitance C1, the 4th
Triode Q4, relay J1.4 feet of a termination microprocessor control interface P1 of 8th resistance R8, the four or three pole of another termination
The base stage of pipe Q4, with connecing internal electric source, the collector connection third of the 4th triode Q4 is single-phase for the emitter of the 4th triode Q4
The anode of diode D3 and one end of the first capacitance C1, while being connected to the coil cathode of relay J1；Third single-phase diode
The cathode of D3 is connected with the other end of the first capacitance C1, and is connected to the coil electrode of relay J1, while being connected to internal electricity
13 feet of source VCC, relay J1 are grounded, and 11 feet of relay J1 connect one end of the 9th resistance R9 in 1 switching circuit of road, relay
9 feet of device J1 connect one end of the 16th resistance R16 in 2 switching circuit of road.
On the one hand the control signal circuit of the present embodiment has saved the port money of microprocessor by using relay J1
Source, it is only necessary to which port control signal just can control the meter reading of two paths all the way；On the other hand the investment of administrative department is reduced
Cost, in the case where not increasing collecting device, meter reading it is more.
As shown in Figure 5：1 switching circuit of channel include the 7th resistance R7, the 9th resistance R9, eleventh resistor R11, second
Effect pipe Q2.1 port protection circuit of channel includes the 5th resistance R5, the 6th resistance R6, the first thermistor F1, the first transition suppression
Device TVS1 processed.7th one end resistance R7 is connected with one end of the grid of the second field-effect tube Q2 and the 9th resistance R9, the 7th electricity
The other end of resistance R7 is connected with the source electrode of the second field-effect tube Q2, and is connected to the output end of telecommunication circuit；Second field-effect tube
The drain end of Q2 is connected to 1 foot of one end and the first thermistor F1 of eleventh resistor R11, and eleventh resistor R11's is another
End is with being connected to external power supply；1 foot of first thermistor F1 is connected with 2 feet of the first transient suppressor TVS1, the first transition
1 foot of suppressor TVS1 is connected to one end of the 5th resistance R5, and is connected on the cathode port for waiting for meter reading meter, the 5th resistance R5
Another termination external power supply, 2 feet of the first thermistor F1 are connected with the other end of the 6th resistance R6, and be connected to and wait copying
On the positive port of meter.
As shown in Figure 6：2 switching circuit of channel include the 16th resistance R16, the 14th resistance R14, the 18th resistance R18,
Third field-effect tube Q3.1 port protection circuit of channel includes twelfth resistor R12, thirteenth resistor R13, the second thermistor
F2, the second transient suppressor TVS2.Specific connection relation and 1 switching circuit of channel, the connection of 1 port protection circuit of channel
Relationship is identical, and details are not described herein again.
The operation principle of the present embodiment is as follows：
When microprocessor by telecommunication circuit to external copy reading meter transmission data when, pass through microprocessor control interface P1
Set signal M_bus-TX to low level " 0 ", the first Phototube Coupling integrates circuit U 1 and is connected at this time, and the first Phototube Coupling is integrated
3,4 feet of circuit U 1 are in short-circuit condition, and the grid of the first field-effect tube Q1 is high level, the source electrode of the first field-effect tube Q1 and
Drain is in cut-off state, its drain end output is low level, the second single-phase diode D2 cut-offs, the first single-phase diode D1
Conducting, the voltage value of M_bus+ signals is close to VCC3 at this time.When signal M_bus-TX is set by microprocessor control interface P1
It is set to high level " 1 ", the first Phototube Coupling integrates circuit U 1 and ends at this time, and the first Phototube Coupling integrates at 3,4 feet of circuit U 1
It is low level in the grid of open-circuit condition, the first field-effect tube Q1, the source electrode and drain of the first field-effect tube Q1 are on shape
State, its drain end output are high level, the second single-phase diode D2 conductings, since supply voltage VCC2 is more than VCC3 voltages
10V or more, so, the first single-phase diode D1 reversely ends, and the voltage value of M_bus+ signals is close to VCC2 at this time.
When needing the channels M_bus1 copy reading meter data, by microprocessor control interface P1 by signal M_bus_CTL
It is set as high level " 1 ", the base stage of the 4th triode Q4 is height, at this time the 4th triode Q4 cut-offs, at the coil of relay J1
In off-position, 11 feet of relay J1 by normally-closed contact with being connected to external power supply, the grid of the second field-effect tube Q2 at this time
Extremely low level, the source electrode and drain of the second field-effect tube Q2 is in the conduction state, its drain end output is high level, is passed through
Signal of communication is sent to the output port M_bus1+ of 1 port protection circuit of channel, signal M_bus1- by the first thermistor F1
With being connected to external power supply by the 5th resistance R5.
When needing the channels M_bus2 copy reading meter data, by microprocessor control interface P1 by signal M_bus_CTL
It is set as low level " 0 ", the base stage of the 4th triode Q4 is low, and the 4th triode Q4 is connected at this time, at the coil of relay J1
In electriferous state, 9 feet of relay J1 are closed with being connected to external power supply by normally opened contact, at this time third field-effect tube Q3
Grid is low level, and the source electrode and drain of third field-effect tube Q3 is in the conduction state, its drain end output is high level, is led to
Cross the output port M_bus2+ that signal of communication is sent to 2 port protection circuit of channel by the second thermistor F2, signal M_
Bus2- by twelfth resistor R12 with being connected to external power supply.
The first transient suppressor TVS1, the first thermistor F1, the 6th R6 pairs of resistance in 1 port protection circuit of channel
The channels M_bus1 play a protective role, and inhibit the influence of outside port overvoltage and overcurrent；In 2 port protection circuit of channel
The second transient suppressor TVS2, the second thermistor F2, thirteenth resistor R13 play a protective role to the channels M_bus2, press down
The influence of outside port overvoltage and overcurrent processed.
The first field-effect tube Q1, the second field-effect tube Q2, third field-effect tube Q3 in the M-bus channel selection circuits is equal
Using the field-effect tube of P-channel.
The above is only the preferred embodiment of the utility model, is not intended to limit the utility model, it is noted that
For those skilled in the art, without deviating from the technical principle of the utility model, it can also do
Go out several improvements and modifications, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
1. a kind of M-bus channel selection circuits, including microprocessor, telecommunication circuit, control signal circuit and at least two-way is logical
Road switch protecting circuit；The microprocessor by microprocessor control interface respectively with telecommunication circuit, control signal circuit phase
Even；Channel switch protects the front end connection communication circuit and control signal circuit of circuit, rear end connection to wait for meter reading meter；Its feature exists
In the control signal circuit includes relay, triode, single-phase diode；Single-phase diode is in parallel with capacitance；Triode
Base stage connects the Single port of microprocessor control interface through resistance；The anode of the collector connection diode of triode, connects simultaneously
It is connected to the coil cathode of relay；The cathode of diode is connected to the coil electrode of relay；At least two paths switch protection
Contact switch of the circuit through relay is with being connected to external power supply.
2. M-bus channel selection circuits according to claim 1, which is characterized in that the channel switch protects circuit packet
Include channel switching circuit and access port protection circuit, the front end connection communication circuit and control signal electricity of channel switching circuit
Road, rear end interface channel port protection circuit, access port protection circuit connection wait for meter reading meter.
3. M-bus channel selection circuits according to claim 2, which is characterized in that the channel switch protects circuit packet
Include two-way, i.e. 2 switching circuit of 1 switching circuit of channel, 1 port protection circuit of channel and channel, 2 port protection circuit of channel.
4. M-bus channel selection circuits according to claim 3, which is characterized in that 1 switching circuit of the channel is through relay
The normally-closed contact of device is with being connected to external power supply；Normally opened contact of 2 switching circuit of channel through relay is with being connected to external power supply.
5. according to claim 1 ~ 4 any one of them M-bus channel selection circuits, which is characterized in that the telecommunication circuit packet
It includes Phototube Coupling and integrates circuit, the first field-effect tube, the first single-phase diode, the second single-phase diode and a series of resistance；Light
1 foot for being electrically isolated integrated circuit connects the internal electric source VCC of microprocessor through resistance；Phototube Coupling integrates the 2 feet connection of circuit
Microprocessor control interface；Phototube Coupling integrates the grid of 3 feet the first field-effect tube of connection of circuit, and Phototube Coupling integrates circuit
4 feet connect the source electrode phase of the first field-effect tube, and be connected to external power supply VCC2；The drain of first field-effect tube Q1 respectively with
The anode of second single-phase diode is connected；The cathode of second single-phase diode is connected with the cathode of the first single-phase diode, and even
It is connected to channel switch protection circuit；The anode of first single-phase diode is connected to external power supply VCC3.
6. according to claim 2 ~ 4 any one of them M-bus channel selection circuits, which is characterized in that the access port is protected
Protection circuit includes thermistor, transient suppressor and a series of resistance；1 foot of thermistor is connected with 2 feet of transient suppressor,
With connecing external power supply through resistance, 1 foot of transient suppressor is also connected with the cathode port for waiting for meter reading meter to 1 foot of transient suppressor, heat
Resistance is connected between 2 feet of quick resistance and 1 foot of transient suppressor, 2 feet of thermistor are also connected with the positive terminal for waiting for meter reading meter
Mouthful.
7. according to claim 2 ~ 4 any one of them M-bus channel selection circuits, which is characterized in that the channel switch electricity
Road includes the second field-effect tube and a series of resistance；The grid of second field-effect tube connects control signal circuit through resistance；Second
The output end of the source electrode connection communication circuit of field-effect tube；The drain resistance grounded of second field-effect tube, the second field-effect tube
Drain be also connected with access port protection circuit input terminal.
8. M-bus channel selection circuits according to claim 5, which is characterized in that further include：First field-effect tube
Using the field-effect tube of P-channel.
9. M-bus channel selection circuits according to claim 7, which is characterized in that further include：Second field-effect tube
Using the field-effect tube of P-channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820221530.2U CN207909118U (en) | 2018-02-08 | 2018-02-08 | A kind of M-bus channel selection circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820221530.2U CN207909118U (en) | 2018-02-08 | 2018-02-08 | A kind of M-bus channel selection circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207909118U true CN207909118U (en) | 2018-09-25 |
Family
ID=63562338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820221530.2U Active CN207909118U (en) | 2018-02-08 | 2018-02-08 | A kind of M-bus channel selection circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207909118U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360404A (en) * | 2018-12-13 | 2019-02-19 | 湖南常德牌水表制造有限公司 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device and method |
| CN109754591A (en) * | 2018-12-21 | 2019-05-14 | 湖南常德牌水表制造有限公司 | A kind of kilowatt meter reading-out system and meter register method |
| CN113867303A (en) * | 2021-10-25 | 2021-12-31 | 杭州和利时自动化有限公司 | IO channel circuit and DCS system |
-
2018
- 2018-02-08 CN CN201820221530.2U patent/CN207909118U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360404A (en) * | 2018-12-13 | 2019-02-19 | 湖南常德牌水表制造有限公司 | A kind of M-Bus main website multi-channel intelligent meter reading remote transmission device and method |
| CN109360404B (en) * | 2018-12-13 | 2023-08-15 | 湖南常德牌水表制造有限公司 | Multichannel intelligent meter reading remote transmission device and method for M-Bus master station |
| CN109754591A (en) * | 2018-12-21 | 2019-05-14 | 湖南常德牌水表制造有限公司 | A kind of kilowatt meter reading-out system and meter register method |
| CN113867303A (en) * | 2021-10-25 | 2021-12-31 | 杭州和利时自动化有限公司 | IO channel circuit and DCS system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207909118U (en) | A kind of M-bus channel selection circuits | |
| CN203481783U (en) | Short circuit and overcurrent protection circuit and mass production test equipment | |
| CN107069655A (en) | A kind of voltage protection circuit | |
| CN103490374A (en) | Mass production test device and short-circuit current foldback circuit thereof | |
| CN205539381U (en) | Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts | |
| CN207677431U (en) | A kind of overvoltage crowbar and Switching Power Supply | |
| CN207117156U (en) | A kind of voltage protection circuit | |
| CN103683178A (en) | Data center equipment and over-current and under-voltage protection circuit thereof | |
| CN103163419B (en) | Indicator and method for cable core correction and transformer tripping outlet correction | |
| CN201075665Y (en) | Protection test control apparatus having functions of alternating-current/direct-current general use and checking the same term | |
| CN208386141U (en) | output protecting device and terminal controller | |
| CN204205576U (en) | A kind of T link differential protection | |
| CN207601191U (en) | A kind of relay protection outlet pulse-detecting circuit | |
| CN208001163U (en) | A kind of battery charge-discharge circuit with short circuit and reversal connection protection function | |
| CN103997101B (en) | A kind of charging circuit and a kind of electronic equipment | |
| CN209119793U (en) | Overcurrent short-circuit protection circuit and electronic equipment | |
| CN102290861A (en) | Intelligent modular comprehensive terminal protector | |
| CN205484714U (en) | Circuit is listened to killer switch state | |
| CN204205708U (en) | A kind of multi input power supply switch circuit | |
| CN209486845U (en) | A kind of bidirectional bus short circuit isolator | |
| CN203504129U (en) | Component for determining breaker switching on/off signal generation | |
| CN208969835U (en) | Mbus host transmit circuit | |
| CN206272139U (en) | A kind of electronic type of distribution terminal it is anti-jump and point, combined floodgate monitoring arrangement | |
| CN203231468U (en) | Cabinet air conditioner having direct-current reverse connection resisting and alternating-current voltage offset detecting functions | |
| CN207717932U (en) | Circuit state diagnostic circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |