CN217718493U - Sensor isolation conversion device - Google Patents
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- CN217718493U CN217718493U CN202221743923.2U CN202221743923U CN217718493U CN 217718493 U CN217718493 U CN 217718493U CN 202221743923 U CN202221743923 U CN 202221743923U CN 217718493 U CN217718493 U CN 217718493U
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Abstract
The utility model provides a sensor, a power supply module, an isolation conversion module, a microprocessor and an interface conversion module; the sensor is used for acquiring first data information of a measured object and converting the first data information into first transmission data; the isolation conversion module is connected with the sensor and obtains second transmission data through the first transmission data; the microprocessor is connected with the output end of the isolation conversion module to obtain second data information; the input end of the interface conversion module is connected with the microprocessor, and the output end of the interface conversion module is connected with the external PLC controller and used for sending the second data information to the external PLC controller; the power module is respectively connected with the sensor, the isolation conversion module, the microprocessor and the interface conversion module and is used for providing electric energy and realizing power isolation. The utility model discloses a power module realizes that the power keeps apart, keeps apart conversion module and realizes that the signal keeps apart to convert data information into the form that corresponds the PLC interface through interface conversion module.
Description
Technical Field
The utility model relates to a sensor protocol conversion technology field especially relates to a conversion equipment is kept apart to sensor.
Background
In the field of industrial control, RS485 is a very classic and common serial communication interface, and the communication protocol based on the RS485 interface is most commonly the Modbus RTU protocol, which is simple, reliable, universal and open, and thus is adopted by many industrial product manufacturers, especially by some sensors on the control bottom layer.
At present, when a sensor installed outdoors is subjected to lightning strike, high voltage can be introduced into a PLC (programmable logic controller) to cause serious damage to a control system, meanwhile, part of the PLC (programmable logic controller) is not provided with an RS485 interface, or even if the PLC is provided with the RS485 interface, the PLC does not support a Modbus-RTU protocol, and therefore obstacles are brought to the PLC for acquiring the sensor which transmits sensing data based on the RS485 and the Modbus RTU protocol.
Therefore, the sensor in the prior art has the problems that the PLC is damaged due to the fact that high voltage is easily introduced into the PLC, and the communication mode of the PLC does not support data interaction with the sensor.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a sensor isolation and conversion device, which aims to solve the problem that the PLC is possibly damaged due to the introduction of the PLC by high voltage when the outdoor sensor in the related technology is struck by lightning; meanwhile, for the PLC which does not support RS485 and/or Modbus-RTU protocols, the technical problem of obstacles exists in the process of acquiring data information of the sensor.
The utility model provides a conversion equipment is kept apart to sensor, conversion equipment includes:
the device comprises a sensor, a power supply module, an isolation conversion module, a microprocessor and an interface conversion module;
the sensor is used for acquiring first data information of a measured object and converting the first data information into first transmission data based on an RS485 communication protocol;
the input end of the isolation conversion module is connected with the output end of the sensor and is used for carrying out isolation conversion on the received first transmission data to obtain second transmission data;
the microprocessor is connected with the output end of the isolation conversion module and used for carrying out data analysis on the second transmission data to obtain second data information;
the input end of the interface conversion module is connected with the microprocessor, and the output end of the interface conversion module is connected with an external PLC controller when in use and is used for sending the second data information to the external PLC controller;
the power module is respectively connected with the sensor, the isolation conversion module, the microprocessor and the interface rotation module and is used for providing electric energy and realizing power isolation.
Optionally, the power module comprises:
an outer side voltage stabilizer, an inner side voltage stabilizer and a DCDC converter;
the input end of the DCDC converter is connected with the positive output end of the power supply, and the DCDC converter is used for converting the input voltage of the positive output end of the power supply into a fixed voltage and outputting the fixed voltage to the input end of the outer side voltage stabilizer;
the input end of the outer side voltage stabilizer is connected with the output end of the DCDC converter and used for converting the fixed voltage into stable target voltage, and the output end of the outer side voltage stabilizer is connected with the input end of the sensor;
the input of inboard stabiliser is connected the anodal output of power, the output of inboard stabiliser respectively with microprocessor keep apart conversion module and interface conversion module and connect, inboard stabiliser is connected simultaneously the DCDC converter, inboard stabiliser be used for with the voltage conversion of the anodal output of power input is stable target voltage, and export respectively extremely microprocessor keep apart conversion module and interface conversion module.
Optionally, the inner stabilizer comprises:
an inner side voltage stabilization management chip;
one end of the fuse is connected with the output end of the positive electrode of the power supply;
a first end of the first capacitor is connected with the second end of the fuse, and the second end of the first capacitor is grounded;
a first end of the second capacitor is connected with a second end of the fuse, and a second end of the second capacitor is connected with an output end of the inner side voltage stabilization management chip;
the cathode of the voltage stabilizing diode is connected with the output end of the inner side voltage stabilizing management chip, and the anode of the voltage stabilizing diode is grounded;
and the first end of the inductance coil is connected with the output end of the inner side voltage stabilization management chip, and the second end of the inductance coil is the output end of the inner side voltage stabilizer.
Optionally, the inner stabilizer further comprises:
the first end of the first resistor is connected with the second end of the fuse, and the second end of the first resistor is connected with the enabling end of the inner side voltage stabilization management chip;
and the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is grounded.
Optionally, the inner stabilizer further comprises:
and a first end of the third capacitor is connected with the voltage input end of the inner side voltage stabilization management chip, and a second end of the third capacitor is grounded.
Optionally, the inner stabilizer further comprises:
a first end of the fourth capacitor is connected with the second end of the inductance coil, and a second end of the fourth capacitor is grounded;
a first end of the third resistor is connected with a second end of the inductance coil, and a second end of the third resistor is connected with an output voltage feedback end of the inner side voltage stabilization management chip;
a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is grounded;
and a first end of the fifth capacitor is connected with the second end of the inductance coil, and a second end of the fifth capacitor is connected with an output voltage feedback end of the inner side voltage stabilization management chip.
Optionally, the isolation conversion module includes an ethernet transceiver and at least three optocouplers, the ethernet transceiver is connected to a 485 communication interface of the sensor, the ethernet transceiver is connected to the at least three optocouplers, and the at least three optocouplers are further connected to the microprocessor.
Optionally, the interface conversion module includes:
a power input end of the differential signal receiver is connected with an output end of the inner side voltage stabilizer; and the signal input end of the differential signal receiver is connected with the signal output end of the microprocessor, and the signal output end of the differential signal receiver is connected with the PLC.
Optionally, the output end of the inner side voltage stabilizer is connected to the power input end of the microprocessor, and the output ends of the inner side voltage stabilizers are respectively connected to the input ends of the primary sides of the at least three optocouplers; the output end of the outer side voltage stabilizer is connected with the input end of the Ethernet transceiver, and the output points of the outer side voltage stabilizer are respectively connected with the input ends of the at least three optical coupler secondary sides.
Optionally, the interface conversion module includes:
and the signal input end of the D/A converter is connected with the signal output end of the microprocessor, and the signal output end of the D/A converter is connected with the PLC.
The technical principle of the utility model is that:
the sensor is used for collecting first data information of a measured object and converting the first data information into first transmission data, the power supply module is used for converting a 9-30V direct-current power supply input from the outside into 5V which can be used by internal components, meanwhile, power supply to the sensor and power isolation of the microprocessor and the like are achieved, the isolation conversion module is used for receiving the first transmission data of the sensor and conducting isolation conversion, signal isolation is achieved, second transmission data are generated, electrical isolation between a follow-up microprocessor and the sensor is achieved through isolation combination of the power supply, the microprocessor analyzes the second transmission data to obtain second data information, and the interface conversion module converts the data information into an interface form corresponding to the PLC.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. through power module supplies power to the sensor, has realized the power isolation, has avoided outdoor sensor when receiving the condition of thunderbolt, introduces PLC with the high voltage and causes the condition of harm to control system.
2. The conversion and isolation conversion module realizes the isolation conversion of transmission data and realizes the electrical isolation by combining the power isolation.
3. And the data information analyzed by the microprocessor is further converted by the interface conversion module for subsequent acquisition of the PLC supporting the corresponding interface.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural diagram of a power module according to the present invention;
FIG. 3 is a circuit diagram of an inner side voltage stabilizer of the power module of the present invention;
fig. 4 is a circuit diagram of an external voltage regulator of the power module of the present invention;
fig. 5 is a circuit diagram of a DCDC converter of the power module according to the present invention;
fig. 6 is a circuit diagram of three opto-couplers and an ethernet transceiver in the middle isolation conversion module of the present invention;
fig. 7 is a circuit diagram of the microprocessor of the present invention;
fig. 8 is a circuit diagram of a differential signal receiver according to the present invention;
fig. 9 is a circuit diagram of the D/a converter of the present invention.
The reference numbers illustrate:
100. a sensor; 110. a power supply module; 111. a DCDC converter; 112. an inner side voltage stabilizer; 113. an outer side voltage stabilizer; 120. an isolation conversion module; 130. a microprocessor; 140. an interface conversion module; 150. a PLC controller.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a sensor 100 isolation conversion device, which comprises:
the sensor 100, the power supply module 110, the isolation conversion module 120, the microprocessor 130 and the interface conversion module 140;
the sensor 100 is configured to collect first data information of a measured object, and further configured to convert the first data information into first transmission data based on an RS485 communication protocol;
the input end of the isolation conversion module 120 is connected to the output end of the sensor 100, and is configured to perform isolation conversion on the received first transmission data to obtain second transmission data;
the microprocessor 130 is connected to the output end of the isolation conversion module 120, and is configured to perform data analysis on the second transmission data to obtain the second data information;
the input end of the interface conversion module 140 is connected to the microprocessor 130, and the output end of the interface conversion module 140 is connected to the external PLC controller 150 when in use, and is configured to send the second data information to the external PLC controller 150;
the power module 110 is respectively connected to the sensor 100, the isolation conversion module 120, the microprocessor 130 and the connection module, and is configured to provide electric energy and achieve power isolation.
In this embodiment, the data information acquired by the sensor 100 includes, but is not limited to, temperature information, pressure information, humidity information, and the like, and the microprocessor 130 is of a type STC8F2K32S2; the power module 110 is respectively connected to the sensor 100, the isolation conversion module 120 and the microprocessor 130, and provides power for the sensor 100, the isolation conversion module 120 and the microprocessor 130, and simultaneously realizes power isolation, the power module 110 is used for converting an externally input 9-30V dc power into 5VDC which can be used by the sensor 100, the isolation conversion module 120 and the microprocessor 130, the isolation conversion module 120 mainly realizes level conversion of a physical interface of the sensor 100, and belongs to a conventional means of a person skilled in the art, and details are not repeated herein;
the sensor 100 collects first data information of a measured object, the first data information is converted into first transmission data through an RS485 (Modbus-RTU) protocol, the first transmission data are transmitted to the isolation conversion module 120, the isolation conversion module 120 receives the first transmission data and conducts isolation conversion, signal isolation is achieved, second transmission data are generated, electrical isolation between the follow-up microprocessor 130 and the sensor 100 is achieved through the isolation combination of the power supply, the microprocessor 130 analyzes the second transmission data to obtain second data information, and the interface conversion module 140 converts the second data information into an interface form corresponding to the PLC 150.
Referring to fig. 2 and 5, optionally, the power module 110 includes:
an outer regulator 113, an inner regulator 112, and a DCDC converter 111;
the input end of the DCDC converter 111 is connected to the positive output end of the power supply, and the DCDC converter 111 is configured to convert an input voltage at the positive output end of the power supply into a fixed voltage and output the fixed voltage to the input end of the outer side voltage stabilizer 113;
the input end of the external regulator 113 is connected to the output end of the DCDC converter 111, and is configured to convert the fixed voltage into a stable target voltage;
the input end of the inner side voltage stabilizer 112 is connected to the power supply anode output end, the output end of the inner side voltage stabilizer 112 is respectively connected to the microprocessor 130, the isolation conversion module 120 and the interface conversion module 140, the inner side voltage stabilizer 112 is simultaneously connected to the DCDC converter 111, and the inner side voltage stabilizer 112 is used for converting the voltage input by the power supply anode output end into a stable target voltage and respectively outputting the stable target voltage to the microprocessor 130, the isolation conversion module 120 and the interface conversion module 140.
In this embodiment, since the conversion of a large voltage into a fixed small voltage is to be achieved, the step-down DCDC converter 111 is adopted, the DCDC converter 111 converts the input voltage of the positive output terminal of the power supply into an effectively output fixed voltage 24VDC, and the external regulator 113 and the internal regulator 112 are used for converting the voltage into the working power supply 5VDC of the microprocessor 130, the isolation conversion module 120 and the interface conversion module 140.
Referring to fig. 3, optionally, the inner stabilizer 112 includes:
an inner side voltage stabilization management chip P2;
one end of the fuse F1 is connected with the output end of the positive electrode of the power supply;
a first end of the first capacitor C1 is connected to the second end of the fuse F1, and a second end of the first capacitor C1 is grounded;
a first end of the second capacitor C2 is connected to a second end of the fuse F1, and a second end of the second capacitor C2 is connected to an output end of the inner side voltage stabilization management chip P2;
the cathode of the voltage stabilizing diode D1 is connected with the output end of the inner side voltage stabilizing management chip P2, and the anode of the voltage stabilizing diode D1 is grounded;
and a first end of the inductance coil L1 is connected to the output end of the inner side voltage stabilization management chip P2, and a second end of the inductance coil L1 is the output end of the inner side voltage stabilizer 112.
In this embodiment, the inner side voltage stabilization management chip P2 is of an MP2451DT-LF-Z type, the chips inside the outer side voltage stabilizer 113 are of the same type, the inner side voltage stabilizer 112 includes a fuse F1 for implementing overcurrent protection, the voltage output by the positive electrode of the power supply is filtered by the first capacitor C1 and the second capacitor C2, and a stable voltage is obtained by the reversely connected zener diode D1, and the zener diode D1 simultaneously protects the rear-stage circuit from being damaged due to overvoltage, and outputs a stable working voltage of 5VDC to the isolation conversion module 120, the microprocessor 130 and the interface conversion module 140 after being filtered by the inductor L1.
Referring to fig. 3 and 5, optionally, the inner stabilizer 112 further includes:
a first end of the first resistor R1 is connected to a second end of the fuse F1, and a second end of the first resistor R1 is connected to an enable end of the inner voltage stabilization management chip P2;
a first end of the second resistor R2 is connected to the second end of the first resistor R1, and a second end of the second resistor R2 is grounded.
In this embodiment, the first resistor R1 and the second resistor R2 are grounded in series, so as to realize series voltage division to prevent high voltage breakdown of the resistors and protect the enable terminal of the internal voltage stabilization management chip P2, and the first terminal of the first resistor R1 is further connected to the pin 3 (V1) of the DCDC converter 111, so as to obtain a fixed voltage of the DCDC converter 111 and ensure that the enable terminal of the internal voltage stabilization management chip P2 has a stable input voltage.
Referring to fig. 3 and 5, optionally, the inner stabilizer 112 further includes:
and a first end of the third capacitor C3 is connected to the voltage input end of the inner side voltage stabilization management chip P2, and a second end of the third capacitor C3 is grounded.
In this embodiment, the voltage input terminal VIN (pin 5) of the inner regulated management chip P2 is connected to the pin 3 (V1) of the DCDC converter 111 through the third capacitor C3, and the third capacitor C3 is used for filtering and smoothing the pulsating direct-current voltage.
Referring to fig. 3, optionally, the inner stabilizer 112 further includes:
a fourth capacitor C4, a first end of the fourth capacitor C4 is connected to the second end of the inductor L1, and a second end of the fourth capacitor C4 is grounded;
the third resistor R3 is connected with the second end of the inductance coil L1;
a first end of the fourth resistor R4 is connected to the second end of the third resistor R3, and a second end of the fourth resistor R4 is grounded;
a fifth capacitor C5, wherein a first end of the fifth capacitor C5 is connected to the second end of the inductor L1, and a second end of the fifth capacitor C5 is connected to an output voltage feedback end of the inner voltage stabilization management chip P2;
and an output voltage feedback end of the inner side voltage stabilization management chip P2 is connected between the third resistor R3 and the fourth resistor R4.
In this embodiment, the voltage at the output end of the inner side voltage stabilizer 112 is filtered by the fourth capacitor C4, divided by the third resistor R3 and the fourth resistor R4, and filtered by the fifth capacitor C5 to the output voltage feedback end of the inner side voltage stabilization management chip P2.
Referring to fig. 3 and 4, the outer regulator 113 has one less fuse than the inner regulator 112, and the circuit configuration is the same.
Referring to fig. 6 and 7, optionally, the isolation conversion module 120 includes an ethernet transceiver and at least three opto-couplers, where the ethernet transceiver is connected to the 485 communication interface of the sensor, the ethernet transceiver is respectively connected to the at least three opto-couplers, and the at least three opto-couplers are further connected to the microprocessor 130.
In this embodiment, data information of the sensor 100 is input and output through the ethernet transceiver (pin 6 and pin 7), and signal isolation is achieved through at least three optocouplers connected to the ethernet transceiver, where the microprocessor 130 connected to the at least three optocouplers is designed to receive and transmit for external communication, so the three optocouplers are also bidirectional, for the microprocessor 130, for external transmission, a primary side of the optocoupler is V1, when the optocoupler receives a signal, the primary side is V2, the optocoupler is TLP2362, and the ethernet transceiver is SN75176BDR.
Referring to fig. 7 and 8, optionally, the interface conversion module 140 includes:
a differential signal receiver, a power input terminal of the differential signal receiver is connected with an output terminal of the inner side voltage stabilizer 112; the signal input end of the differential signal receiver is connected to the signal output end of the microprocessor 130, and the signal output end of the differential signal receiver is connected to the PLC controller 150.
In this embodiment, the signal transfer interface module includes a differential signal receiver U2, the model of the differential signal receiver U2 is MAX488ESA, a simple SSI one-transceiver protocol is implemented, and is dominated by the connected microprocessor 130, a pin 2 of the differential signal receiver U2 is connected to a pin 26 of the microprocessor 130, a pin 3 of the differential signal receiver U2 is connected to a pin 25 of the microprocessor 130, and the differential signal receiver U2 is used for implementing level conversion, and converting the TTL protocol of the processor into an SSI (RS 422) protocol recognized by an SSI interface of the PLC controller 150.
Referring to fig. 6 and fig. 7, alternatively, the output terminal of the inner side voltage regulator 112 is connected to the power input terminal of the microprocessor 130, and the output terminals of the inner side voltage regulator 112 are respectively connected to the input terminals of the at least three primary sides of the optical coupler; the output end of the outside voltage stabilizer 113 is connected with the input end of the Ethernet transceiver, and the output point of the outside voltage stabilizer 113 is respectively connected with the input ends of the at least three optical coupler secondary sides.
In this embodiment, the at least three optocouplers are OP1, OP2, and OP3, the primary inputs of OP1 and OP2 are connected to the output of the inner side voltage regulator 112, the secondary inputs of OP1 and OP2 are connected to the output of the outer side voltage regulator 113, the output pin VO of OP1 is connected to the pin 21 of the microprocessor 130, the output pin VO of OP2 is connected to the pin 20 of the microprocessor 130, the primary input of OP3 is connected to the output of the outer side voltage regulator 113, the secondary input of OP3 is connected to the output of the inner side voltage regulator 112, and the output pin VO of OP3 is connected to the pin 19 of the microprocessor 130.
Referring to fig. 7 and 9, optionally, the interface conversion module 140 includes:
and a signal input end of the D/a converter is connected with a signal output end of the microprocessor 130, and a signal output end of the D/a converter is connected with the PLC controller 150.
In this embodiment, the model of the D/a converter is DAC8760, the power input end of the D/a converter is connected to pin 3 (V1) of the DCDC converter 111, and the sensing data transmitted by the sensor 100 based on the RS485 (Modbus-RTU protocol) is analyzed by the microprocessor 130 and converted into 4-20mA by the D/a converter, so as to be collected by the industrial control equipment supporting the 4-20mA interface.
It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A transducer isolation conversion device, the conversion device comprising:
the device comprises a sensor, a power supply module, an isolation conversion module, a microprocessor and an interface conversion module;
the sensor is used for acquiring first data information of a measured object and converting the first data information into first transmission data based on an RS485 communication protocol;
the input end of the isolation conversion module is connected with the output end of the sensor and is used for carrying out isolation conversion on the received first transmission data to obtain second transmission data;
the microprocessor is connected with the output end of the isolation conversion module and used for carrying out data analysis on the second transmission data to obtain second data information;
the input end of the interface conversion module is connected with the microprocessor, and the output end of the interface conversion module is connected with an external PLC controller when in use and used for sending the second data information to the external PLC controller;
the power module is respectively connected with the sensor, the isolation conversion module, the microprocessor and the interface conversion module and is used for providing electric energy and realizing power isolation.
2. The sensor isolation conversion apparatus of claim 1, wherein the power module comprises:
an outer side voltage stabilizer, an inner side voltage stabilizer and a DCDC converter;
the input end of the DCDC converter is connected with the positive output end of the power supply, and the DCDC converter is used for converting the input voltage of the positive output end of the power supply into a fixed voltage and outputting the fixed voltage to the input end of the outer side voltage stabilizer;
the input end of the outer side voltage stabilizer is connected with the output end of the DCDC converter and used for converting the fixed voltage into stable target voltage, and the output end of the outer side voltage stabilizer is connected with the input end of the sensor;
the input of inboard stabiliser is connected the anodal output of power, the output of inboard stabiliser respectively with microprocessor, keep apart conversion module and interface conversion module and connect, inboard stabiliser is connected simultaneously the DCDC converter, inboard stabiliser is used for with the voltage that the anodal output of power input converts stable target voltage into, and exports respectively to microprocessor, keep apart conversion module and interface conversion module.
3. The sensor isolation conversion arrangement of claim 2, wherein said inner voltage regulator comprises:
an inner side voltage stabilization management chip;
one end of the fuse is connected with the output end of the positive electrode of the power supply;
a first end of the first capacitor is connected with a second end of the fuse, and a second end of the first capacitor is grounded;
a first end of the second capacitor is connected with a second end of the fuse, and a second end of the second capacitor is connected with an output end of the inner side voltage stabilization management chip;
the cathode of the voltage stabilizing diode is connected with the output end of the inner side voltage stabilizing management chip, and the anode of the voltage stabilizing diode is grounded;
and the first end of the inductance coil is connected with the output end of the inner side voltage stabilization management chip, and the second end of the inductance coil is the output end of the inner side voltage stabilizer.
4. The sensor isolation conversion apparatus of claim 3, wherein said inner voltage stabilizer further comprises:
the first end of the first resistor is connected with the second end of the fuse, and the second end of the first resistor is connected with the enabling end of the inner side voltage stabilization management chip;
and the first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is grounded.
5. The sensor isolation conversion apparatus of claim 3, wherein said inner voltage stabilizer further comprises:
and a first end of the third capacitor is connected with the voltage input end of the inner side voltage stabilization management chip, and a second end of the third capacitor is grounded.
6. The sensor isolation conversion arrangement of claim 3, wherein said inner voltage regulator further comprises:
a first end of the fourth capacitor is connected with the second end of the inductance coil, and a second end of the fourth capacitor is grounded;
a first end of the third resistor is connected with a second end of the inductance coil, and a second end of the third resistor is connected with an output voltage feedback end of the inner side voltage stabilization management chip;
a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is grounded;
and a first end of the fifth capacitor is connected with the second end of the inductance coil, and a second end of the fifth capacitor is connected with an output voltage feedback end of the inner side voltage stabilization management chip.
7. The sensor isolation conversion device of claim 6, wherein the isolation conversion module comprises an Ethernet transceiver and at least three optocouplers, the Ethernet transceiver is connected with the 485 communication interface of the sensor, the Ethernet transceiver is respectively connected with the at least three optocouplers, and the at least three optocouplers are further connected with the microprocessor.
8. The sensor isolation conversion apparatus of any one of claims 3-7, wherein the interface conversion module comprises:
a power input end of the differential signal receiver is connected with an output end of the inner side voltage stabilizer; and the signal input end of the differential signal receiver is connected with the signal output end of the microprocessor, and the signal output end of the differential signal receiver is connected with the PLC.
9. The isolated transducer of claim 7, wherein the output of the inner side voltage stabilizer is connected to the power input of the microprocessor, and the output of the inner side voltage stabilizer is connected to the input of the primary side of the at least three optical couplers respectively; the output end of the outer side voltage stabilizer is connected with the input end of the Ethernet transceiver, and the output end of the outer side voltage stabilizer is respectively connected with the input ends of the at least three optical coupler secondary sides.
10. The sensor isolation conversion apparatus of claim 8, wherein the interface conversion module comprises:
and the signal input end of the D/A converter is connected with the signal output end of the microprocessor, and the signal output end of the D/A converter is connected with the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202221743923.2U CN217718493U (en) | 2022-07-06 | 2022-07-06 | Sensor isolation conversion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221743923.2U CN217718493U (en) | 2022-07-06 | 2022-07-06 | Sensor isolation conversion device |
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| CN217718493U true CN217718493U (en) | 2022-11-01 |
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