CN207283386U - A kind of AC-DC power module of band RS485 isolation bus interface - Google Patents
A kind of AC-DC power module of band RS485 isolation bus interface Download PDFInfo
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- CN207283386U CN207283386U CN201721207757.3U CN201721207757U CN207283386U CN 207283386 U CN207283386 U CN 207283386U CN 201721207757 U CN201721207757 U CN 201721207757U CN 207283386 U CN207283386 U CN 207283386U
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Abstract
The utility model discloses a kind of AC DC power modules of band RS485 isolation bus interface, including two-way AC DC isolated power supplies, digital signal isolation circuit, RS485 transceivers, ac power input end, bus signals output terminal, control signal output；AC DC isolated power supplies are designed as isolation doubleway output AC DC isolated power supplies by the utility model, doubleway output can not only internally provide operating voltage, distribution voltage output can also be externally provided, it is achieved thereby that save a DC DC isolated power supply, the volume of product reduces, function is constant, RS485 number bus transmission circuits need not be redesigned when carrying out system design, the great design processes simplified of energy, allows client to possess the integrated level of higher and more preferable reliability.
Description
Technical field
Switch power technology field is the utility model is related to, more specifically, being related to a kind of band RS485 isolation bus interface
AC-DC power module.
Background technology
With the development of science and technology with progress, every field all respective equipment is proposed high integration, miniaturization
It is required that and the popularization of switch power technology is exactly to have complied with this demand and gone from strength to strength.
It is known that traditional Switching Power Supply can carry out voltage conversion, energy transmission and electrical isolation, such as：Traditional
Above-mentioned repertoire can be achieved in separate AC-DC Switching Power Supplies, however, in actual control system or data monitoring system
In, traditional separate AC-DC Switching Power Supplies only provide booster action in systems, and only account for the sub-fraction of system.
Fig. 1 show the control system formed using existing AC-DC isolated power supplies.Including AC-DC isolated power supplies, control electricity
Road, DC-DC isolated power supplies, digital signal isolation circuit, RS485 transceivers.AC-DC isolated power supply input terminals are connected to alternating current
Source, AC-DC isolated power supply output terminals are connected respectively to control circuit and DC-DC isolated power supplies, in order to control circuit and DC-DC isolation
Power supply provides drive signal；DC-DC isolated power supply output terminals are connected to RS485 transceivers, and isolation is provided for bus transceiver
Driving DC voltage；Control circuit include controller, other function modules, wherein controller respectively with other function modules, number
Word signal isolation circuit connects；Digital signal isolation circuit is connected with the controller in control circuit, RS485 transceivers at the same time；
Other function modules are used to receive extraneous I/O signal ports input signal, and the I/O signal ends that other function modules are received
The input signal of mouth sends controller to after specific function is handled, and the signal after controller module treats is converted into number
Word signal is output to number bus port after digital signal isolation circuit, RS485 transceivers successively.Same bus transceiver
Also number bus port input signal can be received, RS485 transceivers receive number bus port input signal, after conversion
It is transferred to digital signal isolation circuit and carries out electrical isolation, digital signal isolation circuit receives bus transceiver signal and passes through number
Controller is sent into after word signal isolation circuit electrical isolation, controller exports signal specific, work(to function module after treatment
Energy module is output to I/O signal ports after receiving the laggard particular procedure excessively of controller signals.
AC power is mainly converted to DC power supply and is used for other circuits in system by the AC-DC isolated power supplies in Fig. 1.
However, internal system usually also needs to integrated RS485 bus communication functions, and RS485 bus ports generally require to control with other
Circuit processed is (such as：Controller) electrical isolation is carried out, it is more conventional to realize that control circuit is isolated with RS485 bus ports
Way is to provide isolated power supply by DC-DC isolated power supplies for RS485 transceivers, using digital signal isolation circuit to controller
Isolated with RS485 transceivers, this traditional designing scheme is complicated, integrated level is low and volume is big, it is difficult to meet system height
The requirement of integrated level, small size and high reliability.
Utility model content
Have in view of that, the technical problem to be solved by the present invention is to provide a kind of AC- of band RS485 isolation bus interface
DC power module, breaks through the limitation that tradition separate AC-DC Switching Power Supplies only provide voltage conversion, energy transmission, electrical isolation,
Integrate RS485 isolation bus interface again on the basis of traditional separate AC-DC Switching Power Supplies.
The technical solution that the utility model solves above-mentioned technical problem is as follows：
A kind of AC-DC power module of band RS485 isolation bus interface, it is characterised in that：Isolate electricity including two-way AC-DC
Source, digital signal isolation circuit, RS485 transceivers, ac power input end, bus signals output terminal and control signal output
End；
Two-way AC-DC isolated power supplies input terminal connects AC power, receives alternating voltage drive signal；Two-way AC-DC every
First via DC power supply is exported from the first output terminal of power supply, the second output terminal of two-way AC-DC isolated power supplies exports the second road direct current
Power supply, first via DC power supply and the second road DC power supply are electrically isolated from one another；
First end connection two-way AC-DC the second output terminals of isolated power supply of RS485 transceivers, when RS485 transceivers receive
To the second output terminal of two-way AC-DC isolated power supplies provide direct voltage drive signal when just start-up operation；
The first output terminal of digital signal isolation circuit first end connection two-way AC-DC isolated power supplies, digital signal isolation electricity
Road second end connection two-way AC-DC the second output terminals of isolated power supply, when digital signal isolation circuit receives two-way AC-DC at the same time
Just start during the direct voltage drive signal that the first output terminal of isolated power supply and the second output terminal of two-way AC-DC isolated power supplies provide
Work；
Control signal output, digital signal isolation circuit, RS485 transceivers and bus signals output terminal are sequentially connected with,
It is used for realization and is mutually transmitted between external control circuit, digital signal isolation circuit, RS485 transceivers and external bus
Signal.
Preferably, two-way AC-DC isolated power supplies are Switching Power Supply.
Preferably, the first DC power output end, the first DC power output end and two-way AC-DC isolated power supplies are further included
First output terminal connects, for externally providing distribution voltage.
Preferably, the second DC power output end, the second DC power output end and two-way AC-DC isolated power supplies are further included
Second output terminal connects, for externally providing distribution voltage.
Preferably, the first DC power output end and the second DC power output end are further included；First DC power supply exports
End is connected with two-way AC-DC the first output terminals of isolated power supply, for externally providing first via distribution voltage；Second DC power supply is defeated
Outlet is connected with two-way AC-DC the second output terminals of isolated power supply, for externally providing the second road distribution voltage.
It should be noted that：Input terminal, the first DC power output end and the second direct current of two-way AC-DC isolated power supplies
Source output terminal is positive minus two terminals；The first output terminal and the second output terminal, RS485 of two-way AC-DC isolated power supplies
First end, the first end and second end of digital signal isolation circuit of transceiver are positive minus two output ports；Bus
The number of terminals of signal output part and control signal output can carry out flexible configuration according to the actual requirements；These are for ability
It is known technology for the technical staff in domain, equivalent to implicit disclosure, in order to enable the claim of the utility model
Book is more brief, without limitation.
The innovative point of the utility model be AC-DC isolated power supplies not exclusively of the prior art to Fig. 1, DC-DC every
Simply function superposition is carried out from power supply, RS485 transceivers and digital signal isolation circuit to integrate, but dexterously by AC-
DC isolated power supplies are designed as isolation doubleway output AC-DC isolated power supplies, relevant first DC power output end and the second direct current
Power output end can not only internally provide operating voltage, moreover it is possible to distribution voltage output externally be provided, it is achieved thereby that saving
One DC-DC isolated power supply, the volume reduction of product, function are constant.
The beneficial effects of the utility model are as follows：
(1) also integrated RS485 isolation bus is received on the basis of traditional separate AC-DC Switching Power Supply repertoires are realized
Function is sent out, need not redesign RS485 isolation bus transmission circuits when carrying out system design, the great design processes simplified of energy,
Client is allowed to possess the integrated level of higher and more preferable reliability；
(2) indoor design has the mutually isolated D/C power output of two-way, on the premise of traditional scheme identical function is realized
A DC-DC isolated power supply can be saved, which can be greatly improved system power supply conversion, utilization ratio, it is difficult to reduce system design
Degree, saves design, Material Cost, reduces system bulk, there is provided system reliability.
Brief description of the drawings
Fig. 1 is the control system schematic diagram that the AC-DC power supplys of the prior art form；
Fig. 2 is the control for the AC-DC power module composition that a kind of band RS485 provided by the utility model isolates bus interface
System schematic；
Fig. 3 is the AC-DC power module structural representation that a kind of band RS485 provided by the utility model isolates bus interface
Figure.
Embodiment
In order to illustrate more clearly of the technical solution of the utility model, introduced in detail below in conjunction with attached drawing, show and
Easy insight, drawings in the following description are only the embodiment of the utility model, for those of ordinary skill in the art,
On the premise of not making the creative labor, other attached drawings can also be obtained according to the attached drawing of offer.
The purpose of this utility model is a kind of AC-DC power module of band RS485 isolation bus interface, and the power module was both
It can realize the repertoire of traditional separate AC-DC Switching Power Supplies, and RS485 digital signal isolation features can be provided, and can be real
Existing RS485 digital signals are mutually changed with RS485 number bus, moreover it is possible to save a DC-DC isolated power supply so as to reduce product
Volume.
In order to enable the above-mentioned purpose of the utility model, feature and advantage can become apparent, say in detail below
It is bright.
Fig. 2 is shown using a kind of AC-DC power module group of band RS485 isolation bus interface provided by the utility model
Into control system, control system described in Fig. 2 with described in Fig. 1 control system realize function it is identical.Include described in Fig. 2：Band
The AC-DC isolated power supplies module of RS485 isolation bus interface, (wherein control circuit includes control circuit：Other function modules,
Controller)；AC-DC isolated power supplies module with RS485 isolation bus interface is connected with AC power port and control circuit, is used
Driving DC voltage, which is converted into, in the AC drive voltage for inputting AC power port is supplied to control circuit；Band RS485 every
AC-DC isolated power supplies module from bus interface is connected with control circuit internal controller, for receiving the number of controller output
Word signal, and the digital signal isolation of controller output is converted into bus signals and is output to number bus port；Band RS485 every
AC-DC isolated power supplies module from bus interface can also receive the bus signals of number bus port, and bus signals are converted
For digital signal, and controller is sent to after electrical isolation.
In Fig. 2 schemes, AC power essential characteristic includes but not limited to：Signal frequency：50Hz、60Hz；Signal waveform：
Sine wave；
In Fig. 2 schemes, number bus is RS485 buses；
In Fig. 2 schemes, the type that I/O signals include can carry out flexible configuration, the utility model according to the actual requirements
It is without limitation.
A kind of AC-DC isolated power supplies module of band RS485 isolation bus interface of the utility model shown in Fig. 2 should possess following
Feature：
1st, two-way AC-DC isolated power supplies are isolation type switching power supply, it can realize traditional separate AC-DC Switching Power Supply energy
Realize all functions, include but not limited to voltage conversion, electrical isolation, energy transmission.
2nd, two-way AC-DC isolated power supplies possess the mutually isolated DC power supply output of two-way；
3rd, the AC-DC isolated power supplies module with RS485 isolation bus interface is internally integrated numeral for isolation type switching power supply
Signal isolation circuit and bus transceiver.
Fig. 3 shows that a kind of AC-DC power module structure of band RS485 isolation bus interface provided by the utility model is shown
It is intended to.
AC-DC power module with RS485 isolation bus interface shown in Fig. 3 includes, two-way AC-DC isolated power supplies 100, number
Word signal isolation circuit 200, RS485 transceivers 300.
Wherein, the input terminal of two-way AC-DC isolated power supplies 100 is connected with AC signal port, for receiving AC signal
The alternating voltage drive signal of input port, it is double after two-way AC-DC isolated power supplies 100 receive alternating voltage drive signal
Road AC-DC isolated power supplies 100 are started to work.Two-way AC-DC isolated power supplies 100 include the DC voltage that two-way is electrically isolated from one another
Signal is exported, the direct voltage output signal that two-way is electrically isolated from one another is respectively DC power supply 1, DC power supply 2, DC power supply
1 is connected with 200 first side of digital signal isolation circuit, and DC power supply 2 is connected with 200 second side of digital signal isolation circuit, when
Digital signal isolation circuit 200 starts when receiving DC power supply 1, the direct voltage drive signal that DC power supply 2 provides at the same time
Work.DC power supply 1 is also connected with DC power supply port 1 at the same time, for the direct voltage drive signal for exporting DC power supply 1
It is output to DC power supply port 1.DC power supply 2 is connected with RS485 transceivers 300 at the same time, for being carried for RS485 transceivers 300
For direct voltage drive signal, RS485 transceivers 300 start when receiving the driving DC voltage signal of the offer of DC power supply 2
Work.DC power supply 2 is also connected with DC power supply port 2, for the direct voltage drive signal output for exporting DC power supply 2
To DC power supply port 2.
200 first side of digital signal isolation circuit is connected with director port, the second side of digital signal isolation circuit 200
It is connected with RS485 transceivers 300.Be used for realization digital signal isolation circuit 200 and controller, 300 three of RS485 transceivers it
Between mutually transmit signal, be in more detail the first function be 200 first side joint admission controller of digital signal isolation circuit send
To the digital signal of digital signal isolation circuit 200, and by digital signal after digital signal isolation circuit 200 is isolated from
Two sides are transmitted to RS485 transceivers 300；Second function is that 200 second side joint of digital signal isolation circuit receives RS485 transceivers
300 are sent to the digital signal of digital signal isolation circuit 200, and by digital signal by digital signal isolation circuit 200 every
From after controller is transmitted to from the first side.
Bus transceiver is connected with the second side of digital signal isolation circuit 200 and number bus port at the same time.For connecing
Receive the digital signal of 200 second side of digital signal isolation circuit and be converted into number bus signal and exported from number bus port,
Or receive the digital signal of number bus port and be converted into digital signal and be output to the second of digital signal isolation circuit 200
Side.
In conclusion a kind of AC-DC power module of band RS485 isolation bus interface provided by the utility model, the electricity
Source module can realize the repertoire of traditional separate AC-DC Switching Power Supplies first, while should be electrically isolated from one another with two-way
DC power supply, and the power supply be integrated with digital signal isolation and bus transceiver, so in practical application the power supply will more
Advantage, is embodied in the Power integrity higher, better reliability, with traditional scheme relatively under can more save a DC-
DC isolated power supplies, cost is lower, volume smaller.
The described above of embodiment disclosed in the utility model, is to enable those skilled in the art real
Now or using the utility model, a variety of modifications to the above embodiment will be apparent to one skilled in the art
, the general principles defined herein can without departing from the spirit or scope of the present utility model, in other realities
Apply in mode and realize, therefore, the utility model is not intended to be limited to embodiment shown in this article, and is to fit to and this paper
Disclosed utility model conceives consistent most wide scope.
Claims (5)
- A kind of 1. AC-DC power module of band RS485 isolation bus interface, it is characterised in that：Isolate electricity including two-way AC-DC Source, digital signal isolation circuit, RS485 transceivers, ac power input end, bus signals output terminal and control signal output End；Two-way AC-DC isolated power supplies input terminal connects AC power, receives alternating voltage drive signal；Two-way AC-DC isolation electricity Source the first output terminal output first via DC power supply, the second output terminal of two-way AC-DC isolated power supplies export the second road DC power supply, First via DC power supply and the second road DC power supply are electrically isolated from one another；First end connection two-way AC-DC the second output terminals of isolated power supply of RS485 transceivers, when RS485 transceivers receive it is double Just start to work during the direct voltage drive signal that road the second output terminal of AC-DC isolated power supplies provides；Digital signal isolation circuit first end connection two-way AC-DC isolated power supplies the first output terminal, digital signal isolation circuit the Two ends connect two-way AC-DC the second output terminals of isolated power supply, when digital signal isolation circuit receives two-way AC-DC isolation at the same time Just start work during the direct voltage drive signal that the first output terminal of power supply and the second output terminal of two-way AC-DC isolated power supplies provide Make；Control signal output, digital signal isolation circuit, RS485 transceivers and bus signals output terminal are sequentially connected with, and are used for Realize and letter is mutually transmitted between external control circuit, digital signal isolation circuit, RS485 transceivers and external bus Number.
- 2. the AC-DC power module of band RS485 isolation bus interface according to claim 1, it is characterised in that：Two-way AC-DC isolated power supplies are Switching Power Supply.
- 3. the AC-DC power module of band RS485 isolation bus interface according to claim 1, it is characterised in that：Further include First DC power output end, the first DC power output end are connected with two-way AC-DC the first output terminals of isolated power supply, for pair Outer offer distribution voltage.
- 4. the AC-DC power module of band RS485 isolation bus interface according to claim 1, it is characterised in that：Further include Second DC power output end, the second DC power output end are connected with two-way AC-DC the second output terminals of isolated power supply, for pair Outer offer distribution voltage.
- 5. the AC-DC power module of band RS485 isolation bus interface according to claim 1, it is characterised in that：Further include First DC power output end and the second DC power output end；First DC power output end and two-way AC-DC isolated power supplies First output terminal connects, for externally providing first via distribution voltage；Second DC power output end isolates electricity with two-way AC-DC Source the second output terminal connection, for externally providing the second road distribution voltage.
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| CN201721207757.3U CN207283386U (en) | 2017-09-20 | 2017-09-20 | A kind of AC-DC power module of band RS485 isolation bus interface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591995A (en) * | 2017-09-20 | 2018-01-16 | 广州金升阳科技有限公司 | A kind of AC DC power modules of band RS485 isolation EBI |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591995A (en) * | 2017-09-20 | 2018-01-16 | 广州金升阳科技有限公司 | A kind of AC DC power modules of band RS485 isolation EBI |
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