CN213937973U - Synchronous acquisition and conversion device for RS485 interface equipment - Google Patents
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Abstract
The utility model is suitable for an automatic instrument synchronous acquisition technical field provides a RS485 interface device synchronous acquisition conversion equipment. The device includes: the system comprises at least one downstream RS485 interface unit, a photoelectric isolation unit corresponding to the downstream RS485 interface unit, a channel management control unit, a central control unit and an upstream RS485 interface unit; the channel management control unit is used for carrying out communication protocol conversion on all the collected data after the isolation conversion, sending the collected data after the communication protocol conversion to the central control unit, receiving a collection command sent by the central control unit and sending the collection command to all the photoelectric isolation units in parallel. The embodiment of the utility model provides a can realize all low reaches RS485 interface unit synchronous acquisition data, avoid unifying RS485 interface device's data transmission protocol's problem through increasing extra communication protocol conversion module.
Description
Technical Field
The utility model belongs to the technical field of automatic instrument synchronous acquisition, especially, relate to a synchronous acquisition conversion equipment of RS485 interface equipment.
Background
At present, a central heating station automatic control system is provided with a plurality of energy consumption measuring instruments, such as a calorimeter, a frequency converter, an electric energy meter, a flowmeter and the like, and data acquisition of the automatic instruments is generally acquired by an upper computer system through an RS485 interface.
And the upper computer system usually only has 1 RS485 interface, so that various automatic meters can only be connected to the RS485 interface of the upper computer system in a parallel connection mode. The RS485 interface of the upper computer system collects data in a mode of polling RS485 equipment addresses, namely the upper computer system can only collect data of one RS485 equipment address at a time, and then data collection of the next RS485 equipment address is carried out after the data collection is finished, so that synchronous collection of a plurality of RS485 equipment cannot be realized. And the communication protocols of different types of automatic instruments are different, and a communication protocol conversion module is also needed to be added to unify the data transmission protocol of the RS485 equipment, so that the data acquisition of the RS485 equipment can be realized.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a RS485 interface device gathers conversion equipment in step to solve among the prior art RS485 interface and need communication protocol conversion module to carry out the communication protocol conversion and can not satisfy the problem that different automatic instrument gathered in step.
The embodiment of the utility model provides a first aspect provides a synchronous acquisition conversion equipment of RS485 interface device, include: the system comprises at least one downstream RS485 interface unit, a photoelectric isolation unit corresponding to the downstream RS485 interface unit, a channel management control unit, a central control unit and an upstream RS485 interface unit;
the at least one downstream RS485 interface unit is respectively connected with the channel management control unit through a corresponding photoelectric isolation unit, the downstream RS485 interface unit is used for acquiring data, sending the acquired data to the corresponding photoelectric isolation unit, and forwarding the data to the channel management control unit after the corresponding photoelectric isolation unit performs data isolation protection;
the channel management control unit is connected with the central control unit, is used for receiving all data, converting the received data into a uniform preset communication protocol by adopting a corresponding communication protocol and then sending the uniform preset communication protocol to the central control unit, and is also used for receiving an acquisition command sent by the central control unit and sending the acquisition command to all the photoelectric isolation units in parallel;
the central control unit is connected with the upper RS485 interface unit, the central control unit is used for processing received data which accord with the preset communication protocol, sending the processed data to the upper RS485 interface unit, sending the processed data to an upper computer system by the upper RS485 interface unit, and the central control unit is also used for receiving an acquisition command sent by the upper RS485 interface unit.
In an embodiment, the channel management control unit has 2N I/O interfaces, and each downstream RS485 interface unit is connected to two I/O interfaces of the channel management control unit through a corresponding photoelectric isolation unit, where N is a positive integer.
In one embodiment, 2N I/O interfaces in the channel management control unit form N RS485 interface transceiver channels, each RS485 interface transceiver channel is provided with a different communication protocol, and the different RS485 interface transceiver channels are isolated from each other.
In an embodiment, the synchronous acquisition and conversion device for RS485 interface equipment further includes: a data registering unit;
the data registering unit is connected with the central control unit and is used for temporarily storing the data which are received by the central control unit and accord with the preset communication protocol.
In an embodiment, the synchronous acquisition and conversion device for RS485 interface equipment further includes: an upper RS232 interface unit and an embedded operating system unit;
the embedded operating system unit is connected with the upper RS232 interface unit, the upper RS232 interface unit is connected with the central control unit, and the embedded operating system unit is used for carrying out parameter configuration on the synchronous acquisition and conversion device of the RS485 interface equipment.
In an embodiment, the synchronous acquisition and conversion device for RS485 interface equipment further includes: a power supply driving unit;
the power supply driving unit is respectively connected with the central control unit and the channel management control unit and is used for providing a first power supply voltage for the central control unit and the channel management control unit.
In an embodiment, the synchronous acquisition and conversion device for RS485 interface equipment further includes: at least one surge protection unit;
each surge protection unit is connected with a corresponding downstream RS485 interface unit.
In one embodiment, the surge protection unit includes: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a voltage regulator D1 and a voltage regulator D2;
one end of the resistor R1 is used for inputting a driving voltage, and the other end of the resistor R1 is respectively connected with one end of the resistor R2, one end of the resistor R4 and the input end A of the downstream RS485 interface unit;
the other end of the resistor R2 is respectively connected with one end of the resistor R3, one end of the resistor R5 and the input end B end of the downstream RS485 interface unit;
the other end of the resistor R3 is grounded;
the other end of the resistor R4 is connected with the anode of the voltage regulator tube D1 and then serves as a first input end, and the cathode of the voltage regulator tube D1 is connected with the cathode of the voltage regulator tube D2;
and the anode of the voltage regulator tube D2 is connected with the other end of the resistor R5 and then serves as a second input end, and the first input end and the second input end are used for being connected with corresponding RS485 equipment.
In one embodiment, the optoelectronic isolation unit includes: the circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a photoelectric coupler OC1, a photoelectric coupler OC2 and a photoelectric coupler OC 3;
a second power voltage is input to one end of the resistor R6, the other end of the resistor R6 is connected to the first I/O interface of the channel management control unit and the collector of the photocoupler OC1, the emitter of the photocoupler OC1 is grounded, the cathode of the photocoupler OC1 is connected to the receiver output end of the downstream RS485 interface unit, the anode of the photocoupler OC1 is connected to one end of the resistor R7, and the other end of the resistor R7 is input with a driving voltage;
the second power voltage is input to one end of the resistor R8, the other end of the resistor R8 is connected to the anode of the photocoupler OC2, the cathode of the photocoupler OC2 is connected to the second I/O interface of the channel management control unit, the emitter of the photocoupler OC2 is grounded, the collector of the photocoupler OC2 is connected to one end of the resistor R9 and the driver input end of the downstream RS485 interface unit, and the other end of the resistor R9 is input with the driving voltage;
the second power voltage is input to one end of the resistor R10, the other end of the resistor R10 is connected to the anode of the photocoupler OC3, the cathode of the photocoupler OC3 is connected to the fixed I/O interface of the channel management control unit, the emitter of the photocoupler OC3 is connected to one end of the resistor R11, the drive enable end of the downstream RS485 interface unit and the receive enable end of the downstream RS485 interface unit, the other end of the resistor R11 is grounded, and the drive voltage is input to the collector of the photocoupler OC 3.
In an embodiment, the synchronous acquisition and conversion device for RS485 interface equipment further includes: a protective housing;
the protective shell is arranged outside the upper RS485 interface unit, the central control unit, the channel management control unit, the at least one photoelectric isolation unit and the at least one lower RS485 interface unit, and openings are reserved at the positions of the upper RS485 interface unit and the at least one lower RS485 interface unit.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: in the embodiment of the utility model, each lower RS485 interface unit is connected with a corresponding photoelectric isolation unit, all the photoelectric isolation units are connected with a channel management control unit, the channel management control unit is connected with a central control unit, the central control unit is connected with an upper RS485 interface unit, the channel management control unit can be used for sending acquisition commands to all the photoelectric isolation units in parallel, then the data are sent to the corresponding downstream RS485 interface units through all the photoelectric isolation units, the synchronous acquisition of the data of the corresponding RS485 interface equipment is realized through all the downstream RS485 interface units, after all the downstream RS485 interface units collect the data of the corresponding RS485 interface equipment, the communication protocol conversion is carried out through the channel management control unit, and further, the problem that the data transmission protocol of the RS485 interface equipment is unified by adding an additional communication protocol conversion module is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a synchronous acquisition and conversion device of an RS485 interface device provided in an embodiment of the present invention;
fig. 2 is an interface schematic diagram of an embedded operating system unit provided by an embodiment of the present invention;
fig. 3 is a circuit diagram of the channel management control unit provided by the embodiment of the present invention connected to the RS485 interface unit at the downstream through the photoelectric isolation unit.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Referring to fig. 1, a synchronous acquisition and conversion device for RS485 interface equipment includes: the system comprises at least one downstream RS485 interface unit 9, a photoelectric isolation unit 8 corresponding to the downstream RS485 interface unit 9, a channel management control unit 7, a central control unit 4 and an upstream RS485 interface unit 3.
At least one downstream RS485 interface unit 9 is connected with the channel management control unit 7 through a corresponding photoelectric isolation unit 8, the downstream RS485 interface unit 9 is used for collecting data and sending the collected data to the corresponding photoelectric isolation unit 8, and the collected data is transmitted to the channel management control unit 7 after being isolated and protected by the corresponding photoelectric isolation unit 8.
The channel management control unit 7 is connected with the central control unit 4, the channel management control unit 7 is used for receiving all data, converting the received data into a unified preset communication protocol by adopting a corresponding communication protocol and then sending the unified preset communication protocol to the central control unit 4, and the channel management control unit 7 is also used for receiving an acquisition command sent by the central control unit 4 and sending the acquisition command to all the photoelectric isolation units 8 in parallel.
The central control unit 4 is connected with the upper RS485 interface unit 3, the central control unit 4 is used for processing the received data which accord with the preset communication protocol, sending all the processed collected data to the upper RS485 interface unit 3, sending the collected data to the upper computer system through the upper RS485 interface unit 3, and the central control unit 4 is also used for receiving the collected command sent by the upper RS485 interface unit 3.
The downstream RS485 interface unit can be connected with corresponding different RS485 interface devices, different communication protocols and sampling period parameters are configured through the channel management control unit, and the RS485 interface devices can be controlled to achieve synchronous acquisition. The central control unit can perform abnormal data rejection, digital filtering and other customized data processing on the received data which accord with the preset communication protocol, and sends the processed data to the upstream RS485 interface unit.
In the embodiment of the utility model, each lower RS485 interface unit is connected with a corresponding photoelectric isolation unit, all the photoelectric isolation units are connected with a channel management control unit, the channel management control unit is connected with a central control unit, the central control unit is connected with an upper RS485 interface unit, the channel management control unit can be used for sending acquisition commands to all the photoelectric isolation units in parallel, then the data are sent to the corresponding downstream RS485 interface units through all the photoelectric isolation units, the synchronous acquisition of the data of the corresponding RS485 interface equipment is realized through all the downstream RS485 interface units, after all the downstream RS485 interface units collect the data of the corresponding RS485 interface equipment, the communication protocol conversion is carried out through the channel management control unit, and further, the problem that the data transmission protocol of the RS485 interface equipment is unified by adding an additional communication protocol conversion module is avoided.
Optionally, the channel management control unit 7 may have 2N I/O interfaces, and each downstream RS485 interface unit 9 is connected to two I/O interfaces of the channel management control unit 7 through a corresponding photoelectric isolation unit 8, where N is a positive integer.
Optionally, at least two I/O interfaces in the channel management control unit 7 form an RS485 interface transceiver channel, each RS485 interface transceiver channel is provided with a different communication protocol, and the different RS485 interface transceiver channels are isolated from each other.
The channel management control unit may use a Programmable Logic Device (PLD), and may actively send the acquisition command to all the photoelectric isolation units in parallel through an I/O port of the PLD, and further send the acquisition command to a corresponding downstream RS485 interface unit through all the photoelectric isolation units. The downstream RS485 interface unit can simultaneously receive the acquisition command and simultaneously start data acquisition, the acquired data are synchronized to the controller unit of the PLD device through the corresponding photoelectric isolation unit, in order to better communicate with the RS485 interface device, the PLD device can convert the acquired data of different protocols into uniform communication protocols and then send the uniform communication protocols to the central control unit through a bus, for example, the PLD device can convert the acquired data of different protocols into uniform ModBUS protocols and then send the uniform ModBUS protocols to the central control unit through the bus, the central control unit sends the data to the upper computer system through the upstream RS485 interface unit, and all the data can finally communicate with the upper computer system through the uniform ModBUS protocols.
Optionally, referring to fig. 1, the synchronous acquisition and conversion device for RS485 interface equipment may further include: and a data registering unit 6.
The data registering unit 6 is connected to the central control unit 4, and the data registering unit 6 is configured to temporarily store the data that conforms to the preset communication protocol and is received by the central control unit 4.
The data registering unit is used for temporarily storing data which are received by the central control unit and accord with a preset communication protocol, when the synchronous acquisition and conversion device of the RS485 interface equipment cannot communicate with the upper computer system or the data sampling periods of the upper computer system and the RS485 interface equipment are inconsistent, the synchronous acquisition and conversion device of the RS485 interface equipment can actively temporarily store the acquired data of a plurality of parallel RS485 interface equipment in the data registering unit, after the synchronous acquisition and conversion device of the RS485 interface equipment and the upper computer system recover communication, the central control unit can call all the temporarily stored historical data which accord with the preset communication protocol from the data registering unit, process all the data which accord with the preset communication protocol and send the processed data to the upstream RS485 interface unit, and then send the processed data to the upper computer system through the upstream RS485 interface unit, or the central control unit can call the temporarily stored data according to the data sampling period of the upper computer system All historical data which accord with the preset communication protocol in the storage unit are processed and then sent to the upper RS485 interface unit, and further sent to the upper computer system through the upper RS485 interface unit.
Optionally, referring to fig. 1, the synchronous acquisition and conversion device for RS485 interface equipment may further include: an upstream RS232 interface unit 2 and an embedded operating system unit 5.
The embedded operating system unit 5 is connected with the upstream RS232 interface unit 2, the upstream RS232 interface unit 2 is connected with the central control unit 4, and the embedded operating system unit 5 is used for carrying out parameter configuration on the synchronous acquisition and conversion device of the RS485 interface equipment.
Referring to fig. 2, the embedded operating system unit may be disposed in an external manual operator or a computer, and the external manual operator or the computer is connected to the RS485 interface device synchronous acquisition and conversion device through an upstream RS232 interface unit, so as to perform parameter configuration on the RS485 interface device synchronous acquisition and conversion device, thereby implementing visual real-time management of the RS485 interface device synchronous acquisition and conversion device. The configurable parameters may include: the method comprises the steps of communication parameter configuration of all communication ports, configuration of instrument addresses, ModBUS address modification of a synchronous acquisition and conversion device of RS485 interface equipment, working mode configuration, automatic reading cycle configuration and the like. Whether the configuration is successful or not can display corresponding prompt information on an information bar.
The working modes of the synchronous acquisition and conversion device of the RS485 interface equipment can include an automatic search mode and a timing automatic acquisition mode. During the automatic search mode, firstly, the accessed RS485 interface equipment is configured to the channel management control unit, at the moment, the channel management control unit can automatically search the accessed RS485 interface equipment in a broadcasting mode and record a downlink port accessed by the RS485 interface equipment, and during acquisition, the synchronous acquisition and conversion device of the RS485 interface equipment is oriented to the corresponding downlink communication port of the channel management control unit to read data, but not read in the broadcasting mode. And when the automatic acquisition mode is timed, firstly configuring the accessed RS485 interface equipment to the channel management control unit, setting an acquisition period, and then automatically acquiring the data of the accessed RS485 interface equipment at regular time by the channel management control unit.
Optionally, referring to fig. 1, the synchronous acquisition and conversion device for RS485 interface equipment may further include: a power supply drive unit 1.
The power driving unit 1 is connected with the central control unit 4 and the channel management control unit 7, and the power driving unit 1 is configured to provide a first power voltage for the central control unit 4 and the channel management control unit 7.
The power supply driving unit is used as a part for providing constant voltage in the synchronous acquisition and conversion device of the RS485 interface equipment, and can also comprise a DC-DC conversion subunit for providing constant voltage for other parts needing power supply except the central control unit and the channel management control unit in the synchronous acquisition and conversion device of the RS485 interface equipment.
Optionally, referring to fig. 3, the synchronous acquisition and conversion device for RS485 interface equipment may further include: at least one surge protection unit 91. Each surge protection unit 91 is connected with a corresponding downstream RS485 interface unit 9.
The surge protection unit is connected with the corresponding downstream RS485 interface unit, and can resist damage of external instant high voltage to the downstream RS485 interface.
Optionally, the surge protection unit 91 may include: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a voltage regulator D1 and a voltage regulator D2.
One end of the resistor R1 inputs driving voltage, and the other end of the resistor R1 is respectively connected with one end of the resistor R2, one end of the resistor R4 and the input end A of the downstream RS485 interface unit; the other end of the resistor R2 is respectively connected with one end of a resistor R3, one end of a resistor R5 and the input end B end of the downstream RS485 interface unit; the other end of the resistor R3 is grounded; the other end of the resistor R4 is connected with the anode of a voltage regulator tube D1 and then serves as a first input end, and the cathode of the voltage regulator tube D1 is connected with the cathode of a voltage regulator tube D2; and the anode of the voltage regulator tube D2 is connected with the other end of the resistor R5 and then serves as a second input end, and the first input end and the second input end are used for being connected with corresponding RS485 equipment.
The resistance values of the resistor R1, the resistor R2, the resistor R3, the resistor R4 and the resistor R5 can be determined according to the chip adopted by the downstream RS485 interface unit.
Alternatively, referring to fig. 2, the photoelectric isolation unit 8 may include: the circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a photocoupler OC1, a photocoupler OC2 and a photocoupler OC 3.
The second power voltage is input to one end of the resistor R6, the other end of the resistor R6 is connected with the first I/O interface of the channel management control unit and the collector of the photoelectric coupler OC1, the emitter of the photoelectric coupler OC1 is grounded, the cathode of the photoelectric coupler OC1 is connected with the receiver output end of the downstream RS485 interface unit, the anode of the photoelectric coupler OC1 is connected with one end of the resistor R7, and the driving voltage is input to the other end of the resistor R7.
The second power voltage is input to one end of the resistor R8, the other end of the resistor R8 is connected with the anode of the photoelectric coupler OC2, the cathode of the photoelectric coupler OC2 is connected with the second I/O interface of the channel management control unit, the emitter of the photoelectric coupler OC2 is grounded, the collector of the photoelectric coupler OC2 is connected with one end of the resistor R9 and the input end of a driver of the downstream RS485 interface unit respectively, and the driving voltage is input to the other end of the resistor R9.
The second power voltage is input to one end of the resistor R10, the other end of the resistor R10 is connected with the anode of the photoelectric coupler OC3, the cathode of the photoelectric coupler OC3 is connected with the fixed I/O interface of the channel management control unit, the emitter of the photoelectric coupler OC3 is connected with one end of the resistor R11, the drive enabling end of the downstream RS485 interface unit and the receiving enabling end of the downstream RS485 interface unit respectively, the other end of the resistor R11 is grounded, and the drive voltage is input to the collector of the photoelectric coupler OC 3.
The photoelectric isolation unit is used for realizing a photoelectric isolation function and a signal interference suppression function of the RS485 interface device, wherein a driving enable end DE and a receiving enable end RE of a chip U2 adopted by a downstream RS485 interface unit are connected and then connected with one end of a resistor R11 and an emitter of a photoelectric coupler OC3 to form a 'crash' prevention protection circuit, only a connection circuit diagram of the photoelectric isolation unit corresponding to one downstream RS485 interface unit and a channel management control unit is shown in FIG. 3, the photoelectric isolation units corresponding to the other downstream RS485 interface units are connected with the channel management control unit in the same mode and are subjected to isolation protection, and the downstream RS485 interface units cannot be influenced with each other.
Optionally, referring to fig. 1, the synchronous acquisition and conversion device for RS485 interface equipment may further include: and the protective shell 10 is arranged outside the upstream RS485 interface unit 3, the central control unit 4, the channel management control unit 7, the at least one photoelectric isolation unit 8 and the at least one downstream RS485 interface unit 9, and openings are reserved at the positions of the upstream RS485 interface unit 3 and the at least one downstream RS485 interface unit 9.
In this embodiment, the synchronous acquisition and conversion device of the RS485 interface device is protected when passing through the protective casing.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a synchronous acquisition conversion equipment of RS485 interface device which characterized in that includes: the system comprises at least one downstream RS485 interface unit, a photoelectric isolation unit corresponding to the downstream RS485 interface unit, a channel management control unit, a central control unit and an upstream RS485 interface unit;
the at least one downstream RS485 interface unit is respectively connected with the channel management control unit through a corresponding photoelectric isolation unit, the downstream RS485 interface unit is used for acquiring data, sending the acquired data to the corresponding photoelectric isolation unit, and forwarding the data to the channel management control unit after the corresponding photoelectric isolation unit performs data isolation protection;
the channel management control unit is connected with the central control unit, is used for receiving all data, converting the received data into a uniform preset communication protocol by adopting a corresponding communication protocol and then sending the uniform preset communication protocol to the central control unit, and is also used for receiving an acquisition command sent by the central control unit and sending the acquisition command to all photoelectric isolation units in parallel;
the central control unit is connected with the upper RS485 interface unit, the central control unit is used for processing received data which accord with the preset communication protocol, sending the processed data to the upper RS485 interface unit, sending the processed data to an upper computer system by the upper RS485 interface unit, and the central control unit is also used for receiving an acquisition command sent by the upper RS485 interface unit.
2. The device as claimed in claim 1, wherein the channel management control unit has 2N I/O interfaces, and each downstream RS485 interface unit is connected to two I/O interfaces of the channel management control unit through a corresponding photoelectric isolation unit, where N is a positive integer.
3. The device as claimed in claim 2, wherein the 2N I/O interfaces in the channel management control unit form N RS485 interface transceiving channels, each RS485 interface transceiving channel is configured with a different communication protocol, and the different RS485 interface transceiving channels are isolated from each other.
4. The device for synchronously acquiring and converting the RS485 interface equipment according to any one of claims 1 to 3, further comprising: a data registering unit;
the data registering unit is connected with the central control unit and is used for temporarily storing the data which are received by the central control unit and accord with the preset communication protocol.
5. The device for synchronously acquiring and converting the RS485 interface equipment according to any one of claims 1 to 3, further comprising: an upper RS232 interface unit and an embedded operating system unit;
the embedded operating system unit is connected with the upper RS232 interface unit, the upper RS232 interface unit is connected with the central control unit, and the embedded operating system unit is used for carrying out parameter configuration on the synchronous acquisition and conversion device of the RS485 interface equipment.
6. The device for synchronously acquiring and converting the RS485 interface equipment according to any one of claims 1 to 3, further comprising: a power supply driving unit;
the power supply driving unit is respectively connected with the central control unit and the channel management control unit and is used for providing a first power supply voltage for the central control unit and the channel management control unit.
7. The device for synchronously acquiring and converting the RS485 interface equipment according to any one of claims 1 to 3, further comprising: at least one surge protection unit;
each surge protection unit is connected with a corresponding downstream RS485 interface unit.
8. The device as claimed in claim 7, wherein the surge protection unit comprises: a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a voltage regulator D1 and a voltage regulator D2;
one end of the resistor R1 is used for inputting a driving voltage, and the other end of the resistor R1 is respectively connected with one end of the resistor R2, one end of the resistor R4 and the input end A of the downstream RS485 interface unit;
the other end of the resistor R2 is respectively connected with one end of the resistor R3, one end of the resistor R5 and the input end B end of the downstream RS485 interface unit;
the other end of the resistor R3 is grounded;
the other end of the resistor R4 is connected with the anode of the voltage regulator tube D1 and then serves as a first input end, and the cathode of the voltage regulator tube D1 is connected with the cathode of the voltage regulator tube D2;
and the anode of the voltage regulator tube D2 is connected with the other end of the resistor R5 and then serves as a second input end, and the first input end and the second input end are used for being connected with corresponding RS485 equipment.
9. The device as claimed in claim 8, wherein the optoelectronic isolation unit comprises: the circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a photoelectric coupler OC1, a photoelectric coupler OC2 and a photoelectric coupler OC 3;
a second power voltage is input to one end of the resistor R6, the other end of the resistor R6 is connected to the first I/O interface of the channel management control unit and the collector of the photocoupler OC1, the emitter of the photocoupler OC1 is grounded, the cathode of the photocoupler OC1 is connected to the receiver output end of the downstream RS485 interface unit, the anode of the photocoupler OC1 is connected to one end of the resistor R7, and the other end of the resistor R7 is input with a driving voltage;
the second power voltage is input to one end of the resistor R8, the other end of the resistor R8 is connected to the anode of the photocoupler OC2, the cathode of the photocoupler OC2 is connected to the second I/O interface of the channel management control unit, the emitter of the photocoupler OC2 is grounded, the collector of the photocoupler OC2 is connected to one end of the resistor R9 and the driver input end of the downstream RS485 interface unit, and the other end of the resistor R9 is input with the driving voltage;
the second power voltage is input to one end of the resistor R10, the other end of the resistor R10 is connected to the anode of the photocoupler OC3, the cathode of the photocoupler OC3 is connected to the fixed I/O interface of the channel management control unit, the emitter of the photocoupler OC3 is connected to one end of the resistor R11, the drive enable end of the downstream RS485 interface unit and the receive enable end of the downstream RS485 interface unit, the other end of the resistor R11 is grounded, and the drive voltage is input to the collector of the photocoupler OC 3.
10. The device for synchronously acquiring and converting the RS485 interface equipment according to claim 9, further comprising: a protective housing;
the protective shell is arranged outside the upper RS485 interface unit, the central control unit, the channel management control unit, the at least one photoelectric isolation unit and the at least one lower RS485 interface unit, and openings are reserved at the positions of the upper RS485 interface unit and the at least one lower RS485 interface unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117294780A (en) * | 2023-09-12 | 2023-12-26 | 温州蓝天能源科技股份有限公司 | Multi-communication protocol intelligent communication control system suitable for various gas stations |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117294780A (en) * | 2023-09-12 | 2023-12-26 | 温州蓝天能源科技股份有限公司 | Multi-communication protocol intelligent communication control system suitable for various gas stations |
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