CN105652724B - Multifunctional signal isolating converter - Google Patents
Multifunctional signal isolating converter Download PDFInfo
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- CN105652724B CN105652724B CN201410631579.1A CN201410631579A CN105652724B CN 105652724 B CN105652724 B CN 105652724B CN 201410631579 A CN201410631579 A CN 201410631579A CN 105652724 B CN105652724 B CN 105652724B
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Abstract
The present invention provides a kind of multifunctional signal isolating converter, is set to safety zone, which is applied to be set to the electronic device in danger area；The multifunctional signal isolating converter includes signal input part, microprocessor and power-supply unit.The microprocessor judges whether the built-in function of the multifunctional signal isolating converter is normal, to obtain the first judgment value.The electronic device transmits the input signal to the microprocessor by the signal input part；According to the input signal, which judges whether the function of the electronic device is normal, to obtain the second judgment value.According to first judgment value and second judgment value, which controls whether the power-supply unit transmits driving power to the electronic device.Whereby, low cost and efficient multifunctional signal isolating converter are provided.
Description
Technical field
The present invention is in relation to a kind of signal isolation converter, especially a kind of multifunctional signal isolating converter.
Background technology
IEC 60079 and IEC 80079 is the standard that International Electrotechnical Commission is directed to that explosion-proof electric apparatus is stipulated.The relevant technologies
Signal isolation converter captures and common electric signal in converting industry sensor field (such as 0~20mA, 4~20mA, 0
~5V and 0~10V etc.), later the signal isolation converter of the relevant technologies convert above-mentioned electric signal and output signal (such as
0~25mA and -10~10Vdc etc.).
Therefore, signal isolation converter is extremely important.However, the shortcomings that signal isolation converter of the relevant technologies is height
Cost and poor efficiency.
Invention content
The shortcomings that improve the above-mentioned prior art, the purpose of the present invention is to provide a kind of isolation of multifunctional signal to convert
Device.
To reach the above-mentioned purpose of the present invention, multifunctional signal isolating converter of the invention is set to safety zone, this is more
Function signal isolating converter is applied to be set to the electronic device in danger area, which includes：Letter
Number input terminal, the signal input part are electrically connected to the electronic device；Microprocessor, the microprocessor are electrically connected to described
Signal input part；And power-supply unit, the power-supply unit are electrically connected to the microprocessor and the electronic device,
The power-supply unit supplies driving power.The wherein described microprocessor judges the inside of the multifunctional signal isolating converter
Whether function is normal, to obtain the first judgment value；The wherein described electronic device transmits input signal by the signal input part
To the microprocessor；According to the input signal, the microprocessor judges whether the function of the electronic device is normal, with
To the second judgment value；Wherein according to first judgment value and second judgment value, the microprocessor controls the power supply
Whether supply unit transmits the described driving power to the electronic device.
Preferably, the multifunctional signal isolating converter also includes：
Signal isolation unit, the signal isolation unit are electrically connected to the microprocessor and the signal input part,
The wherein described signal isolation unit passes through the signal isolation cell isolation to receive the input signal
The input signal is notified the microprocessor by ground, so as to protecting the microprocessor.
Preferably, the signal isolation unit is electromagnetic type signal isolator, condenser type signal isolator or inductance type letter
Number isolator.
Preferably, the multifunctional signal isolating converter also includes：
Pressure-limit current-limit circuit, the pressure-limit current-limit circuit are electrically connected to the microprocessor, signal input part, described
Signal isolation unit, the power-supply unit and the electronic device,
Wherein the pressure-limit current-limit circuit includes：
At least one Zener diode；And
Current-limiting resistance, the current-limiting resistance are electrically connected to the Zener diode.
Preferably, the multifunctional signal isolating converter also includes：
Signal output apparatus, the signal output apparatus are electrically connected to the microprocessor,
The wherein described microprocessor passes through the signal output apparatus output signal output.
Preferably, the multifunctional signal isolating converter also includes：
Communication module, the communication module are electrically connected to the microprocessor.
Preferably, the multifunctional signal isolating converter also includes：
Amplifying circuit, the amplifying circuit are electrically connected to the microprocessor and the signal output apparatus.
Preferably, the microprocessor judges that the built-in function of the multifunctional signal isolating converter includes：It is described more
Whether the builtin voltage of function signal isolating converter complies with standard voltage, the microprocessor is isolated with the multifunctional signal
Whether the communication of the internal component of converter normal and whether the internal temperature of the multifunctional signal isolating converter meets mark
Quasi- temperature.
Preferably, the microprocessor judges that the function of the electronic device includes：The current value of the input signal is
Whether the no current value for being more than zero or described input signal complies with standard current value.
Preferably, the microprocessor includes analog digital converting unit, the analog digital converting unit will be to will be described
Input signal is converted to digital signal；First judgment value and second judgment value are digital signal value；When described first
When judgment value is not 1 for 1 or described second judgment value, the microprocessor control power-supply unit does not transmit described
Driving power is to the electronic device；When first judgment value is 1 and second judgment value is 1, the microprocessor
It controls the power-supply unit and transmits the driving power to the electronic device；The microprocessor also includes inquiry table；
The microprocessor checks the inquiry table to control whether the power-supply unit transmits the driving power to the electricity
Sub-device.
Compared to the prior art, effect of the invention is to provide low cost and efficient multifunctional signal isolating converter.
Description of the drawings
Fig. 1 is the block diagram of the multifunctional signal isolating converter of the present invention；
Fig. 2 is the schematic diagram of the analog signal of the present invention and the first embodiment of input and output (I/O) conversion function；
Fig. 3 is the schematic diagram of the analog signal of the present invention and the second embodiment of input and output (I/O) conversion function；
Fig. 4 is the schematic diagram of the analog signal input of the present invention and the first embodiment of output conversion function；
Fig. 5 is the schematic diagram of the analog signal input of the present invention and the second embodiment of output conversion function；
Fig. 6 is the schematic diagram of the analog signal input of the present invention and the 3rd embodiment of output conversion function；
Fig. 7 is the schematic diagram of the analog signal input of the present invention and the fourth embodiment of output conversion function；
Fig. 8 is the circuit diagram of the pressure-limit current-limit circuit of the present invention；
Fig. 9 is the schematic diagram of the embodiment of the multifunctional signal isolating converter with digital communication functions in the present invention.
Reference sign
10 safety zone 20 of multifunctional signal isolating converter
30 electronic device 40 of danger area
42 signal input part 102 of input signal
104 signal isolation unit 106 of pressure-limit current-limit circuit
108 amplifying circuit 110 of microprocessor
112 communication module 114 of signal output apparatus
116 analog digital converting unit 118 of power-supply unit
120 driving power 122 of inquiry table
124 transistor switch 126 of output signal
128 first Zener diode 130 of current-limiting resistance
Second Zener diode, 132 third Zener diode 134
First diode, 136 second diode 138
The 4th Zener diode 142 of third diode 140
The 6th Zener diode 146 of 5th Zener diode 144
300 hub 301 of computer
302 sensor S1~9 of wireless hub
901 curve 902 of curve
903 curve 911 of curve
912 curve 913 of curve
914 curve 921 of curve
922 curve 923 of curve
924 curve 931 of curve
932 curve 933 of curve
Curve 934
Specific implementation mode
Detailed description for the present invention and technology contents, cooperation description of the drawings is as follows, however the only conduct of appended attached drawing
Illustrative purposes are not intended to the limitation present invention.
Referring to FIG. 1, the block diagram of the multifunctional signal isolating converter for the present invention.Multifunctional signal isolating converter
10 are set to safety zone 20 (the firstth area), which is applied to be set to danger area 30 (the secondth area)
Electronic device 40.
The multifunctional signal isolating converter 10 includes signal input part 102, pressure-limit current-limit circuit 104, signal isolation list
Member 106, microprocessor 108, amplifying circuit 110, signal output apparatus 112, communication module 114 and power-supply unit 116.It should
Microprocessor 108 includes analog digital converting unit 118 and inquiry table 120.
The signal input part 102 is electrically connected to the electronic device 40；It is micro- that the pressure-limit current-limit circuit 104 is electrically connected to this
Processor 108, the signal input part 102, the signal isolation unit 106, the power-supply unit 116 and the electronic device 40；
The signal isolation unit 106 is electrically connected to the microprocessor 108 and the signal input part 102；The microprocessor 108 electrically connects
It is connected to the signal input part 102；The amplifying circuit 110 is electrically connected to the microprocessor 108 and the signal output apparatus 112；
The signal output apparatus 112 is electrically connected to the microprocessor 108；The communication module 114 is electrically connected to the microprocessor
108；The power-supply unit 116 is electrically connected to the microprocessor 108 and the electronic device 40.
The power-supply unit 116 supplies driving power 122.The microprocessor 108 judges that multifunctional signal isolation turns
Whether the built-in function of parallel operation 10 is normal, to obtain the first judgment value.The electronic device 40 is transmitted by the signal input part 102
Input signal 42 is to the microprocessor 108；According to the input signal 42, which judges the work(of the electronic device 40
Can whether normal, to obtain the second judgment value.According to first judgment value and second judgment value, the microprocessor 108 control
Whether the power-supply unit 116 transmits the driving power 122 to the electronic device 40.
The signal isolation unit 106 is to receive the input signal 42, and isolator by the signal isolation unit 106
The input signal 42 is notified into the microprocessor 108, so as to protecting the microprocessor 108.The signal isolation unit 106 can be such as
But it is not limited to electromagnetic type signal isolator, condenser type signal isolator or inductance type signal isolator.
The signal output apparatus 112 includes relay (Fig. 1 is not shown)；The microprocessor 108 exports electricity by the signal
Road 112 and 110 output signal output 124 of amplifying circuit.The analog digital converting unit 118 is to by 42 turns of the input signal
It is changed to digital signal.
The microprocessor 108 judges that the built-in function of the multifunctional signal isolating converter 10 includes：The multifunctional signal
Whether the builtin voltage of isolating converter 10 complies with standard voltage, the microprocessor 108 and the multifunctional signal isolating converter
10 internal component (such as Serial Peripheral Interface (SPI) (Serial Peripheral Interface, SPI), I2C(Inter-
Integrated Circuit), universal asynchronous receiving-transmitting transmitter (Universal Asynchronous Receiver/
Transmitter, UART)) whether communication normal and whether the internal temperature of the multifunctional signal isolating converter 10 meets
Normal temperature.
If the builtin voltage of the multifunctional signal isolating converter 10 complies with standard voltage, which is judged to
It is set to 1；If the builtin voltage of the multifunctional signal isolating converter 10 does not meet normal voltage, which is judged to
It is set to 0.If the microprocessor 108 and the communication of the internal component of the multifunctional signal isolating converter 10 are normal, this
One judgment value is judged as 1；If the communication of the microprocessor 108 and the internal component of the multifunctional signal isolating converter 10
Abnormal, then first judgment value is judged as 0.If the internal temperature of the multifunctional signal isolating converter 10 complies with standard
Temperature, then first judgment value be judged as 1；If the internal temperature of the multifunctional signal isolating converter 10 is not inconsistent standardization
Temperature, then first judgment value be judged as 0.
The microprocessor 108 judges that the function of the electronic device 40 includes：
1, the online detecting between the multifunctional signal isolating converter 10 and the electronic device 40：Detect the input signal
Whether 42 current value is more than zero.The current value of the input signal 42 is usually 4~20mA；So if the input signal 42
Current value is more than zero, then second judgment value is judged as 1；If the current value of the input signal 42 is zero, this second is sentenced
Disconnected value is judged as 0.
2, whether the current value of the input signal 42 complies with standard current value：
If (a) specification of the current value of the input signal 42 of the electronic device 40 is 4~20mA：When the electronic device
The current value of 40 input signal 42 is less than 3.8mA or is more than 20.5mA, then second judgment value is judged as 0；Conversely, should
Second judgment value is judged as 1.
If (b) specification of the current value of the input signal 42 of the electronic device 40 is 8/16mA：When the electronic device
The current value of 40 input signal 42 is except 8/16mA+-10%, then second judgment value is judged as 0；Conversely, this
Two judgment values are judged as 1.
First judgment value and second judgment value for example but can be not limited to digital signal value；When first judgment value not
For 1 or second judgment value be not 1 when, the microprocessor 108 control the power-supply unit 116 do not transmit the driving power
122 to the electronic device 40；When first judgment value is 1 and second judgment value is 1, which controls the electricity
Source supply unit 116 transmits the driving power 122 to the electronic device 40.
The microprocessor 108 checks the inquiry table 120 to control whether the power-supply unit 116 transmits the driving power
122 to the electronic device 40.The electronic device 40 for example but can be not limited to sensor or actuator.The sensor is measuring
Physical quantity, such as temperature, pressure, thing liquid position etc.；The actuator is changing physical quantity, such as heater, motor etc..More work(
Can signal isolation converter 10 controlling the stop and start of the actuator.
The communication module 114 is to the RS-232 interface for connecting external RS-485 interfaces, outside, external high-speed channel
Addressable remote transducer (highway addressable remote transducer, HART) interface, purple honeybee (ZigBee)
Interface, wireless HART interface or global system for mobile communications (Global System for Mobile Communication,
GSM) interface.The amplifying circuit 110 can increase the input pin of the microprocessor 108 and the quantity of output connecting pin, to reach straight
Connect the equipment for controlling larger voltage and current；The amplifying circuit 110 includes relay (Fig. 1 is not shown).
In addition, the multifunctional signal isolating converter 10 also includes analog signal input module (Fig. 1 is not shown) and number
Signal input module (Fig. 1 is not shown).The analog signal input module is electrically connected to the signal input part 102 and pressure limiting limit
Current circuit 104；The digital signal input module is electrically connected to the signal input part 102 and the pressure-limit current-limit circuit 104.
The analog signal input module is the analog signal input circuit of expansion, to measure other than 0~24mA
Analog signal, such as 0~5V voltages, 0~10V voltages etc..The digital signal input module is to Intelligence sensor of arranging in pairs or groups
(electronic device 40) uses, and numerical data, such as Modbus, HART, Profibus etc. can be transmitted between Intelligence sensor
Transmission specification or independently developed communication protocol.
Referring to FIG. 2, the signal of the first embodiment for the analog signal and input and output (I/O) conversion function of the present invention
Figure；Referring to FIG. 3, the schematic diagram of the second embodiment for the analog signal and input and output (I/O) conversion function of the present invention.Very
(True)/false (False) be the microprocessor 108 input and output pin (I/O) state；That is, the microprocessor 108 according to
According in the inquiry table 120 the 3rd, 4 figures adjust input and output pin (I/O) state.
It please refers to Fig.2；When input signal is greater than the set value, input and output pin (I/O) is set as High, otherwise is set
It is set to Low.It please refers to Fig.3；When input signal is less than setting value, input and output pin (I/O) is set as High, otherwise is set
It is set to Low.Therefore, analog current input signal can be converted to the digital signal of High/Low；The microprocessor 108 can be direct
It is communicated with programmable logic controller (PLC) (Programmable Logic Controller, PLC)；The microprocessor 108
PLC can be directly controlled by the amplifying circuit 110.
Referring to FIG. 4, the schematic diagram of the first embodiment for the analog signal input and output conversion function of the present invention.It should
Microprocessor 108 carrys out converting analogue signals according to Fig. 4~7 in the inquiry table 120.Fig. 4 is electric current conversion table, wherein curve
901 be 4~20mA of input and output 0~20mA transformation curves；Curve 902 is 0~20mA of input and output 0~20mA conversions are bent
Line；Curve 902 is also 4~20mA of input and output 4~20mA transformation curves；Curve 903 be input 0~20mA with output 4~
20mA transformation curves.Above-mentioned signal is the signal that the electronic device 40 (sensor) directly measures, in commercial Application usually
Referred to as controlling level.
Referring to FIG. 5, the schematic diagram of the second embodiment for the analog signal input and output conversion function of the present invention.It is bent
Line 911 is 4~20mA of input and output 20~0mA transformation curves；Curve 912 is 0~20mA of input and output 20~0mA conversions
Curve；Curve 913 is 0~20mA of input and output 20~4mA transformation curves；Curve 914 be input 4~20mA with output 20~
4mA transformation curves.The analog signal and Fig. 4 exported according to Fig. 5 curves is reverse signal, commonly referred to as high in commercial Application
Spend lower limit (Level Low).Upper height limit (Level High) and height lower limit can be converted by Fig. 4,5.
Referring to FIG. 6, the schematic diagram of the 3rd embodiment for the analog signal input and output conversion function of the present invention.It is bent
Line 921 is 4~20mA of input and output 0~5V transformation curves；Curve 922 is 4~20mA of input and output 0~10V conversions are bent
Line；Curve 923 is 0~20mA of input and output 0~5V transformation curves；Curve 924 is that 0~20mA of input and 0~10V of output turns
Change curve.The common current signal of industry can be converted to voltage signal by Fig. 6.
Referring to FIG. 7, the schematic diagram of the fourth embodiment for the analog signal input and output conversion function of the present invention.It is bent
Line 931 is 4~20mA of input and output 5~0V transformation curves；Curve 932 is 4~20mA of input and output 10~0V conversions are bent
Line；Curve 933 is 0~20mA of input and output 5~0V transformation curves；Curve 934 is that 0~20mA of input and 10~0V of output turns
Change curve.Fig. 6,7 are as can be also converted level height and empty barrel height in Fig. 4,5.
Referring to FIG. 8, the circuit diagram of the pressure-limit current-limit circuit for the present invention.The pressure-limit current-limit circuit 104 includes transistor
Switch 126, current-limiting resistance 128, the first Zener diode 130, the second Zener diode 132, third Zener diode 134,
One diode 136, the second diode 138, third diode 140, the 4th Zener diode 142, the 5th Zener diode 144 and
6th Zener diode 146.
The transistor switch 126 is electrically connected to the microprocessor 108 and the power-supply unit 116；The current-limiting resistance
128 are electrically connected to the transistor switch 126 and the electronic device 40；First Zener diode 130 is electrically connected to the electricity
Sub-device 40 and the current-limiting resistance 128；Second Zener diode 132 is electrically connected to the electronic device 40 and the current-limiting resistance
128；The third Zener diode 134 is electrically connected to the electronic device 40 and the current-limiting resistance 128.
First diode 136 is electrically connected to the signal input part 102；Second diode 138 is electrically connected to this
First diode 136；The third diode 140 is electrically connected to second diode 138 and the signal isolation unit 106；It should
4th Zener diode 142 is electrically connected to the third diode 140 and the signal isolation unit 106；5th Zener, two pole
Pipe 144 is electrically connected to the third diode 140 and the signal isolation unit 106；6th Zener diode 146 is electrically connected
To the third diode 140 and the signal isolation unit 106.
When the transistor switch 126 is connected in the microprocessor 108, which transmits the driving power
122 to the electronic device 40；When the microprocessor 108 is not turned on the transistor switch 126, the power-supply unit 116 is not
The driving power 122 is transmitted to the electronic device 40.
Referring to FIG. 9, for the embodiment of the multifunctional signal isolating converter with digital communication functions in the present invention
Schematic diagram.Fig. 9 includes three kinds of communication loops：
1, these multifunctional signal isolating converters 10 are connected to hub 301 (HUB)；The hub 301 is connected to
Level controller, for example, computer 300, can program logic controller (Programmable Logic Controller, PLC, Fig. 9 are not
Show) or data acquisition and monitoring system (supervisory control and data acquisition, SCADA, Fig. 9
It is not shown).
2, these multifunctional signal isolating converters 10 are connected to wireless hub 302；The wireless hub 302 wirelessly connects
(such as ZigBee) is met to the computer 300.
3, these multifunctional signal isolating converters 10 are directly wirelessly connected (such as ZigBee) to the computer 300.
Wherein, the computer 300, the hub 301 (HUB), the wireless hub 302 and the isolation of these multifunctional signals turn
Communication loop between parallel operation 10 can be for example RS-485, RS-232, HART interface, wireless Zigbee, WirelessHART,
The interfaces such as GSM.Communication loop between these multifunctional signal isolating converters 10 and more than two sensor S1~9 can for
Such as Modbus, HART, Profibus.
Effect of the present invention is to provide low cost and efficient multifunctional signal isolating converter.The multifunctional signal
Isolating converter 10 meets IEC 60079 and IEC 80079 (International Electrotechnical Commission is directed to the standard that explosion-proof electric apparatus is stipulated) etc.
Relevant laws and regulations specification.The multifunctional signal isolating converter 10 captures and common electric signal in converting industry sensor field
(such as 0~20mA, 4~20mA, 0~5V and 0~10V etc.), later the multifunctional signal isolating converter 10 convert above-mentioned electricity
Gas signal simultaneously exports the output signal 124 (such as 0~25mA and -10~10Vdc etc.).
The above, only presently preferred embodiments of the present invention illustrate, not limiting to the protection model of the present invention
It encloses, other any equivalent transformations should all belong to claims hereof range.
Claims (10)
1. a kind of multifunctional signal isolating converter, which is characterized in that the multifunctional signal isolating converter is set to safety zone,
The multifunctional signal isolating converter is applied to be set to the electronic device in danger area, the multifunctional signal isolating converter packet
Contain：
Signal input part, the signal input part are electrically connected to the electronic device；
Microprocessor, the microprocessor are electrically connected to the signal input part；And
Power-supply unit, the power-supply unit are electrically connected to the microprocessor and the electronic device, which supplies
Unit is answered to supply driving power,
The wherein described microprocessor judges whether the built-in function of the multifunctional signal isolating converter is normal, to obtain first
Judgment value；
The wherein described electronic device transmits the input signal to the microprocessor by the signal input part；Believe according to the input
Number, the microprocessor judges whether the function of the electronic device is normal, to obtain the second judgment value；
Wherein according to first judgment value and second judgment value, the microprocessor, which controls the power-supply unit, is
It is no to transmit the driving power to the electronic device.
2. multifunctional signal isolating converter as described in claim 1, which is characterized in that the multifunctional signal isolating converter
Also include：
Signal isolation unit, the signal isolation unit are electrically connected to the microprocessor and the signal input part,
The wherein described signal isolation unit is incited somebody to action to receive the input signal by the signal isolation cell isolation
The input signal notifies the microprocessor, so as to protecting the microprocessor.
3. multifunctional signal isolating converter as claimed in claim 2, which is characterized in that the signal isolation unit is electromagnetism
Formula signal isolator, condenser type signal isolator or inductance type signal isolator.
4. multifunctional signal isolating converter as claimed in claim 2, which is characterized in that the multifunctional signal isolating converter
Also include：
Pressure-limit current-limit circuit, the pressure-limit current-limit circuit are electrically connected to the microprocessor, the signal input part, the signal
Isolated location, the power-supply unit and the electronic device,
Wherein the pressure-limit current-limit circuit includes：
At least one Zener diode；And
Current-limiting resistance, the current-limiting resistance are electrically connected to the Zener diode.
5. multifunctional signal isolating converter as claimed in claim 4, which is characterized in that the multifunctional signal isolating converter
Also include：
Signal output apparatus, the signal output apparatus are electrically connected to the microprocessor,
The wherein described microprocessor passes through the signal output apparatus output signal output.
6. multifunctional signal isolating converter as claimed in claim 5, which is characterized in that the multifunctional signal isolating converter
Also include：
Communication module, the communication module are electrically connected to the microprocessor.
7. multifunctional signal isolating converter as claimed in claim 6, which is characterized in that the multifunctional signal isolating converter
Also include：
Amplifying circuit, the microprocessor connect the amplifying circuit, and the amplifying circuit reconnects the signal output electricity
Road.
8. multifunctional signal isolating converter as claimed in claim 7, which is characterized in that the microprocessor judges described more
The built-in function of function signal isolating converter includes：Whether the builtin voltage of the multifunctional signal isolating converter meets mark
Whether quasi- voltage, the communication of the microprocessor and the internal component of the multifunctional signal isolating converter are normal and described more
Whether the internal temperature of function signal isolating converter complies with standard temperature.
9. multifunctional signal isolating converter as claimed in claim 8, which is characterized in that the microprocessor judges the electricity
The function of sub-device includes：Whether the current value whether current value of the input signal is more than zero or described input signal meets
Standard current value.
10. multifunctional signal isolating converter as claimed in claim 9, which is characterized in that the microprocessor includes simulation
Digital conversion unit, the analog digital converting unit by the input signal being converted to digital signal；Described first judges
Value and second judgment value are digital signal value；When it is not 1 that first judgment value, which is not 1 or described second judgment value,
The microprocessor controls the power-supply unit and does not transmit the driving power to the electronic device；Sentence when described first
When disconnected value is 1 and second judgment value is 1, the microprocessor controls the power-supply unit and transmits the driving power
To the electronic device；The microprocessor also includes inquiry table；The microprocessor checks the inquiry table to control the electricity
Whether source supply unit transmits the driving power to the electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410631579.1A CN105652724B (en) | 2014-11-11 | 2014-11-11 | Multifunctional signal isolating converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410631579.1A CN105652724B (en) | 2014-11-11 | 2014-11-11 | Multifunctional signal isolating converter |
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| Publication Number | Publication Date |
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| CN105652724A CN105652724A (en) | 2016-06-08 |
| CN105652724B true CN105652724B (en) | 2018-08-31 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876848Y (en) * | 2005-11-30 | 2007-03-07 | 北京华控技术有限责任公司 | Real-time Industrial ethernet pressure transmitter |
| CN102959363A (en) * | 2009-07-09 | 2013-03-06 | 罗斯蒙德公司 | Process variable transmitter with two-wire process control loop diagnostics |
| CN102981471A (en) * | 2012-11-17 | 2013-03-20 | 福建德生通讯设备有限公司 | Remote monitoring system for radar running status |
-
2014
- 2014-11-11 CN CN201410631579.1A patent/CN105652724B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876848Y (en) * | 2005-11-30 | 2007-03-07 | 北京华控技术有限责任公司 | Real-time Industrial ethernet pressure transmitter |
| CN102959363A (en) * | 2009-07-09 | 2013-03-06 | 罗斯蒙德公司 | Process variable transmitter with two-wire process control loop diagnostics |
| CN102981471A (en) * | 2012-11-17 | 2013-03-20 | 福建德生通讯设备有限公司 | Remote monitoring system for radar running status |
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| Publication number | Publication date |
|---|---|
| CN105652724A (en) | 2016-06-08 |
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