CN202565149U - Intrinsically safe converter wide in input voltage range - Google Patents
Intrinsically safe converter wide in input voltage range Download PDFInfo
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- CN202565149U CN202565149U CN201220211944XU CN201220211944U CN202565149U CN 202565149 U CN202565149 U CN 202565149U CN 201220211944X U CN201220211944X U CN 201220211944XU CN 201220211944 U CN201220211944 U CN 201220211944U CN 202565149 U CN202565149 U CN 202565149U
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Abstract
The utility model relates to the field of communication, in particular to an intrinsically safe converter wide in the input voltage range. The intrinsically safe converter wide in the input voltage range comprises a power input, two wide input voltage switch power modules, an RS232 signal input module, a limiting processing circuit, an RS232-RS485 conversion module, an isolating module and an RS485 intrinsically safe output module. The intrinsically safe converter wide in the input voltage range has the advantages that intrinsically safe RS485 signals can be outputted by the aid of the RS232-RS485 conversion module, the intrinsically safe converter can be applied to intrinsic safety of explosive environments, the wide power voltage input range can be provided, the intrinsically safe converter is compatible to direct current input and alternate current input, the strict requirements of operating environments on input power sources can be met, and interference resistance is enhanced.
Description
Technical field
The utility model relates to communication field, relates in particular to a kind of wide input voltage range essential safe type transducer.
Background technology
Present conversion equipment between RS232 in communication field and the RS485, major part all is not applied to the essential safety design of explosive atmosphere, perhaps; Input power supply for environment for use has the strict requirement of comparison; Like direct current N volt or interchange N volt, such product, or got into not the environment that colliery and oil etc. have explosive dust or gas; Owing to the power supply that does not have coupling in the applied environment needs to increase extra power-supply device, space and fund have been wasted.
The utility model content
The utility model is to overcome the weak point that exists in the prior art; Purpose is to provide a kind of wide input voltage range essential safe type transducer; This transducer can be exported the RS485 signal of essential safety, and very wide supply voltage input range is also arranged, simultaneously compatible direct current and the power supply input that exchanges; Increase jamproof performance simultaneously, solved the problem that exists in the prior art.
The utility model is to achieve the above object through following technological means: a kind of wide input voltage range essential safe type transducer comprises: power supply input, two wide input voltage switch power supply modules, RS232 signal input module, current limliting treatment circuit, RS232-RS485 modular converter, isolation module, RS485 intrinsic safety output module.The power supply input is connected with two wide input voltage switch power supply modules respectively; A wide input voltage switch power supply module is connected with the current limliting treatment circuit; Supply with RS485 intrinsic safety output module behind the power supply process current limliting treatment circuit; When circuit breaks down, or the circuit outside when causing danger situation this part circuit the power supply and the signal of essential safety can be provided; Another wide input voltage switch power supply module then is connected with the RS232 signal input module; The RS232 signal input module is connected with the RS232-RS485 modular converter; After the signal of RS232-RS485 modular converter output is isolated through isolation module; Be sent to RS485 intrinsic safety output module and connect, export the RS485 signal that finally converts through RS485 intrinsic safety output module.
As optimized technical scheme, described isolation module is the light-coupled isolation module, reaches intrinsic safety and non-intrinsic safety are isolated, and the power supply of intrinsic safety side reaches the intrinsic safety requirement of power supply through the current limliting treatment circuit; The isolation of intrinsic safety and non-intrinsic safety is through the light-coupled isolation module, the inner transformer of the switch power module of intrinsic safety power pack is realized electrical isolation completely.
A wide input voltage switch power supply module can produce interchange or the direct current of 24V to 250V, through the current limliting treatment circuit, guarantees the electric current output of intrinsic safety type, and normal operating current of circuit and voltage are provided.Signal is input to the RS232-RS485 modular converter afterwards, output RS485 intrinsic safety signal.
Another wide input voltage switch power supply module also can produce interchange or the direct current of 24V to 250V, for non-intrinsically safe circuit provides power supply.Signal is through the light-coupled isolation module, and isolated with intrinsically safe circuit, the light-coupled isolation module is imported signal, is received output RS485 intrinsic safety signal by the RS232-RS485 modular converter.
Beneficial effect: the utility model has the advantages that the RS485 signal that to export essential safety through the RS232-RS485 signal converter; Be applied to the essential safety of explosive atmosphere; And very wide supply voltage input range can be provided; The strict demand of environment for use to the input power supply satisfied in the input of compatible direct current and alternating current simultaneously, strengthened antijamming capability simultaneously.
Description of drawings
Fig. 1 is a kind of wide input voltage range essential safe type converter structure sketch map.
Embodiment
The utility model is done further to set forth through embodiment below in conjunction with accompanying drawing, but the protection range of the utility model is not limited in this:
As shown in Figure 1; A kind of wide input voltage range essential safe type transducer comprises: power supply input, two wide input voltage switch power supply modules, RS232 signal input module, current limliting treatment circuit, RS232-RS485 modular converter, isolation module, RS485 intrinsic safety output module.The power supply input is connected with two wide input voltage switch power supply modules respectively; A wide input voltage switch power supply module is connected with the current limliting treatment circuit; Power supply is through supplying with RS485 intrinsic safety output module behind the current limliting treatment circuit, when circuit breaks down, or the circuit outside when causing danger situation this part circuit the power supply and the signal of essential safety can be provided; Another wide input voltage switch power supply module then is connected with the RS232 signal input module; The RS232 signal input module is connected with the RS232-RS485 modular converter; The signal of RS232-RS485 modular converter output is sent to RS485 intrinsic safety output module and connects after isolating through isolation module; Export the RS485 signal that finally converts through RS485 intrinsic safety output module.
Described isolation module is the light-coupled isolation module, reaches intrinsic safety and non-intrinsic safety are isolated, and the power supply of intrinsic safety side reaches the intrinsic safety requirement of power supply through the current limliting treatment circuit; The isolation of intrinsic safety and non-intrinsic safety is through the light-coupled isolation module, the inner transformer of the switch power module of intrinsic safety power pack is realized electrical isolation completely.
Two wide input voltage switch power supply modules, assurance can input AC or direct current 24V to the input range of 250V.The current limliting treatment circuit can be demonstrate,proved the electric current output that guarantees intrinsic safety type, and normal operating current of circuit and operating voltage are provided.Ifs circuit breaks down, or intrinsically safe circuit outside dangerous situation such as be short-circuited, and current-limiting circuit is had an effect.Limit big electric current and powerful output, prevent accident and dangerous extension.Play the effect of protection personal safety and device security.There is the two level current limiting defencive function current-limiting circuit inside, if there is first class of protection to lose efficacy, another grade protection can also play a protective role.Further guaranteed the output of essential safe type.
Above said be specific embodiment of the utility model and the know-why of being used; As if the change of doing according to the conception of the utility model; When the function that it produced does not exceed spiritual that specification and accompanying drawing contain yet, must belong to the protection range of the utility model.
Claims (2)
1. wide input voltage range essential safe type transducer is characterized in that comprising: power supply input, two wide input voltage switch power supply modules, RS232 signal input module, current limliting treatment circuit, RS232-RS485 modular converter, isolation module, RS485 intrinsic safety output module; The power supply input is connected with two wide input voltage switch power supply modules respectively; A wide input voltage switch power supply module is connected with the current limliting treatment circuit; Supply with RS485 intrinsic safety output module behind the power supply process current limliting treatment circuit; When circuit breaks down, or the circuit outside when causing danger situation this part circuit the power supply and the signal of essential safety can be provided; Another wide input voltage switch power supply module then is connected with the RS232 signal input module; The RS232 signal input module is connected with the RS232-RS485 modular converter; After the signal of RS232-RS485 modular converter output is isolated through isolation module; Be sent to RS485 intrinsic safety output module and connect, export the RS485 signal that finally converts through RS485 intrinsic safety output module.
2. a kind of wide input voltage range essential safe type transducer as claimed in claim 1, it is characterized in that: isolation module is the light-coupled isolation module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220211944XU CN202565149U (en) | 2012-05-08 | 2012-05-08 | Intrinsically safe converter wide in input voltage range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220211944XU CN202565149U (en) | 2012-05-08 | 2012-05-08 | Intrinsically safe converter wide in input voltage range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202565149U true CN202565149U (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220211944XU Expired - Fee Related CN202565149U (en) | 2012-05-08 | 2012-05-08 | Intrinsically safe converter wide in input voltage range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202565149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684455A (en) * | 2012-05-08 | 2012-09-19 | 费江海 | Intrinsic safety type converter with wide input voltage range |
-
2012
- 2012-05-08 CN CN201220211944XU patent/CN202565149U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684455A (en) * | 2012-05-08 | 2012-09-19 | 费江海 | Intrinsic safety type converter with wide input voltage range |
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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 |
Granted publication date: 20121128 Termination date: 20150508 |
|
| EXPY | Termination of patent right or utility model |