CN208754291U

CN208754291U - A kind of industry WiFi expansion module

Info

Publication number: CN208754291U
Application number: CN201821616561.4U
Authority: CN
Inventors: 张东海
Original assignee: Yunnan Trillion Rich Technology Co Ltd
Current assignee: Yunnan Trillion Rich Technology Co Ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2019-04-16
Anticipated expiration: 2028-09-30

Abstract

The utility model discloses a kind of industry WiFi expansion modules, including main control singlechip, power circuit, WiFi interface circuit, one 485 interface circuit and the 2nd 485 interface circuit, the output end of power circuit and the power end of main control singlechip connect, the data transmit-receive end of WiFi interface circuit and the first data transmit-receive end of main control singlechip connect, the configuration end of WiFi interface circuit and the configuration end of main control singlechip connect, the data transmit-receive end of one 485 interface circuit and the first data transmit-receive end of main control singlechip connect, the data transmit-receive end of 2nd 485 interface circuit and the second data transmit-receive end of main control singlechip connect.Wire communication is carried out by 485 interface circuits and existing equipment, receive the information of existing equipment acquisition, and carries out data transmission and receive by WiFi interface circuit connection wireless network, received control signal is transferred to existing equipment by 485 interface circuits, realize equipment control, effectively simplify the wiring between system, save wiring cost, reduces security risk.

Description

A kind of industry WiFi expansion module

Technical field

The utility model belongs to technical field of communication equipment, specifically, being related to a kind of industry WiFi expansion module.

Background technique

In industrial application, in order to realize that application, the scenes such as data acquisition, equipment control need usage quantity numerous Communication line is attached, to realize the data of acquisition or control the transmission of signal, in complicated industrial control system, into Communication line required for the acquisition of row data and equipment control is more complicated.The communication that these complicated communication lines are applied to Cable is also very more, mutually interspersed between route, if there is exception, is unfavorable for the cable that quickly notes abnormalities, while these are mutually The cable entwined needs to carry out the route placement planning of safety, even more in addition to needing space to be placed to avoid personnel are tripped Or block channel.Especially at the remote remote locations of some distances or the complexity scene that can not be routed, it is ensured that communication line Being reliably connected and being routed is also a very huge engineering.

With the development of the wireless communication modes such as WiFi, the terminal device with WiFi communication ability is also more and more, makes With WiFi communication terminal device can effectively reduce it is existing communicated by wire link when cumbersome wiring process.But In industrial application, from cost consideration, all existing equipment all can not be changed to WiFi communication function Terminal device.If there is a module that can the existing terminal device that can only be communicated by bus is converted to and can be made It is communicated with WiFi, then can effectively simplify the wiring between industrial control system and similar system, saved wiring cost, subtract Less because being routed bring security risk.

Utility model content

For deficiency above-mentioned in the prior art, the utility model provides a kind of industry WiFi expansion module, the expanded mode 485 interface circuits and WiFi interface circuit is arranged in block, is communicated by 485 interface circuits with the bus interface of existing equipment, The information of existing equipment acquisition is received, and is carried out data transmission by WiFi interface circuit by WiFi wireless telecommunications, and pass through WiFi interface circuit receives control signal, and is transferred to existing equipment by 485 interface circuits, controls existing equipment, Effectively simplify the wiring between industrial control system, save wiring cost, reduces because being routed bring security risk.

In order to achieve the above object, the solution that the utility model uses is: a kind of industry WiFi expansion module, including Main control singlechip, power circuit, WiFi interface circuit, the one 485 interface circuit and the 2nd 485 interface circuit, the power supply The output end of circuit and the power end of main control singlechip connect, the data transmit-receive end of the WiFi interface circuit and master control monolithic First data transmit-receive end of machine connects, and the configuration end of the WiFi interface circuit and the configuration end of main control singlechip connect, institute The data transmit-receive end for the one 485 interface circuit stated and the first data transmit-receive end of main control singlechip connect, and the described the 2nd 485 The data transmit-receive end of interface circuit and the second data transmit-receive end of main control singlechip connect.

Further, the power circuit includes power management module and peripheral circuit, the power management module Ground terminal ground connection, feedback end is separately connected first resistor in parallel and connects with the first end of second resistance, first resistor and the The other end of two resistance is grounded, and the first electricity is connected between the Bootstrap port and switching node port of power management module Hold, between the switching node port and first capacitor also with the cathode of Schottky diode and the first inductance in parallel, first The other end of inductance is connect with the anode of the first polarized capacitor, and the cathode and Schottky diode of the first polarized capacitor are just The anode of extremely common ground connection, input power and first diode connects, the cathode of first diode and the electricity of power management module The connection of source input terminal, the cathode of first diode are also connect with the second capacitor in parallel, the second polarized capacitor, 3rd resistor, The other end of 3rd resistor is connect with the enable end of the 4th resistance and power management module, and the 4th resistance, the second capacitor, second have The other end of polar capacitor is grounded；Anode and the second inductance connection of first polarized capacitor, the anode of the first polarized capacitor Also with the 5th resistance and third capacitance connection, the feedback end of the other end and power management module of third capacitor and the 5th resistance connects It connects, the cathode of the other end of the second inductance and the first zener diode, the anode of third polarized capacitor, the 6th resistance and surge Protector connection, the other end of Surge Protector are connect with voltage source, anode and the third polarized electricity of the first zener diode It is grounded after the cathode connection of appearance, the other end of the 6th resistance is connect with the anode of the first light emitting diode, the first light emitting diode Cathode ground connection.

Further, the one 485 interface circuit includes RS485 transceiver and peripheral circuit, and the RS485 is received The receiver output end of hair device is connect with the 7th resistance, and the other end of the 7th resistance is connect with the cathode of the first photoelectrical coupler, The anode of first photoelectrical coupler is connect with after the 4th capacitance connection with 485 interfaces, the collector of the first photoelectrical coupler and master It controls the first of single-chip microcontroller and receives data terminal connection, the emitter of the first photoelectrical coupler is grounded, and the driver of RS485 transceiver is defeated Enter end to connect with the collector of the second photoelectrical coupler, the emitter of the second photoelectrical coupler is connect with G485, the second photoelectricity coupling The anode of clutch is connect after connecting with the 8th resistance with voltage source, and the first of the cathode of the second photoelectrical coupler and main control singlechip Sending data end connection, the collector of the first photoelectrical coupler also pass through the 9th resistance and connect with voltage source, the tenth resistor coupled in parallel Between the anode and the 4th capacitor of the first photoelectrical coupler, the other end of the tenth resistance and the collector of the second photoelectrical coupler Connection, the other end of the tenth resistance are connect with eleventh resistor, and the other end of eleventh resistor and the base stage of triode connect, It is connect after the receiver enable end of RS485 transceiver and the connection of driving enable end with the collector of triode, the transmitting of triode Pole is connect with the end 3.3V, and the anode of the end 3.3V and photoelectric coupling switch connects, and the emitter of photoelectric coupling switch is connected with switch, The cathode of the grounded collector of photoelectric coupling switch, photoelectric coupling switch enables interface by twelfth resistor and external run One end connection, the cathode of photoelectric coupling switch also passes through the 5th capacitor and the emitter of triode connects, the collector of triode The 16th resistance, the ground terminal of RS485 transceiver are connected between the receiver enable end and driving enable end of RS485 transceiver It being connect after being connect with the other end of the 16th resistance with the second end of JK5, the other end of the 16th resistance is also connect with G485, The power end of RS485 transceiver is connect with the anode of the first photoelectrical coupler, anode and the 4th capacitor of the first photoelectrical coupler Between also connect with the end 3.3V, the end 3.3V is also connect with thirteenth resistor, the other end of thirteenth resistor and RS485 transceiver The non-return input of recipient is connected with the non-return output end of driver, the non-return input of the recipient of RS485 transceiver and driving The non-return output end of device is connect by the first thermistor with 485 Interface Terminals, the recipient of RS485 transceiver reversely input and Driver inverse output terminal is connect with the 14th resistance and the 15th resistance respectively, and the other end and G485 of the 14th resistance connect It connects, the other end of the 15th resistance is connect with JK3, also passes through Transient Suppression Diode and RS485 between the 15th resistance and JK3 The non-return input of the recipient of transceiver is connected with the non-return output end of driver.

Further, the 2nd 485 interface circuit includes RS485 transceiver and peripheral circuit, RS485 transceiver The connection of the 21st resistance of receiver output end, the other end of the 21st resistance are connect with the cathode of the second light emitting diode, The anode of second light emitting diode is connect with voltage source, the receiver output end of RS485 transceiver also with main control singlechip the Two receive data terminals connection, behind the receiver enable end of RS485 transceiver and the connection of driving enable end by the 17th resistance and Voltage source connection, the receiver enable end and driving enable end of RS485 transceiver also connect with the enable end RS485 of main control singlechip It connects, the driver input end of RS485 transceiver is connect with the 18th resistance, the other end and third light-emitting diodes of the 18th resistance The cathode of pipe connects, and the anode of third light emitting diode is connect with voltage source, the driver input end of RS485 transceiver also with master The second sending data end connection of single-chip microcontroller is controlled, the power end of RS485 transceiver connect with voltage source, and voltage source is also with the 19th Resistance connection, the other end of the 19th resistance and the non-return input of the recipient of RS485 transceiver and the non-return output of driver End, the connection of the cathode of the second zener diode, third thermistor, the plus earth of the second zener diode, RS485 transceiver Recipient it is non-return input and the non-return output end of driver connect with third thermistor, the other end of third thermistor It is connect with the driving end of LCD module, the recipient of RS485 transceiver reversely inputs and driver inverse output terminal and the 20th electricity Resistance, third zener diode, the second thermistor connection, the 20th resistance the other end ground connection, the second thermistor it is another End is connect with the input terminal of LCD module, the ground terminal ground connection of LCD module, the power supply termination power of LCD module.

Further, the first data output end of the data output end of the WiFi interface circuit and main control singlechip connects It connects, the data input pin of WiFi interface circuit and the first data input pin of main control singlechip connect, and WiFi interface circuit is matched The configuration end for setting end and main control singlechip connects, the status of wireless lan end of WiFi interface circuit and main control singlechip it is wireless The connection of local net state end, the end link_WiFi of WiFi interface circuit and the end link_WiFi of main control singlechip connect, WiFi The power end of interface circuit is connect with voltage source.

Further, first light emitting diode is red light emitting diodes.

Further, second light emitting diode is green LED, and third light emitting diode is red two Pole pipe.

The beneficial effects of the utility model are:

(1) 485 interface circuits and WiFi interface circuit is arranged in the expansion module, passes through 485 interface circuits and existing equipment Bus interface communicated, receive existing equipment acquisition information, and by WiFi interface circuit connect wireless network carry out Data transmission is carried out data transmission and is received by WiFi interface circuit connection wireless network, and received control signal passes through 485 Interface circuit is transferred to existing equipment, controls existing equipment, effectively simplifies the wiring between industrial control system, saves Wiring cost is reduced because being routed bring security risk；

(2) remote locations remote for some distances, cable transportation cost is eliminated during equipment conveying, was routed It does not need first to arrange cable in journey and be routed again, do not need to carry out cable recycling again during take-up yet, saved entirety System time is built, system building efficiency is improved.

Detailed description of the invention

Fig. 1 is the utility model WiFi expansion module schematic diagram；

Fig. 2 is the utility model main control singlechip schematic diagram；

Fig. 3 is the utility model WiFi interface circuit figure；

Fig. 4 is the utility model power circuit diagram；

Fig. 5 is the one 485 interface circuit figure of the utility model；

Fig. 6 is the 2nd 485 interface circuit figure of the utility model；

In attached drawing:

R1- first resistor, R2- second resistance, R3- 3rd resistor, the 4th resistance of R4-, the 5th resistance of R5-, the 6th electricity of R6- Resistance, the 7th resistance of R7-, the 8th resistance of R8-, the 9th resistance of R9-, the tenth resistance of R10-, R11- eleventh resistor, R12- the 12nd Resistance, R13- thirteenth resistor, the 14th resistance of R14-, the 15th resistance of R15-, the 16th resistance of R16-, the 17th electricity of R17- Resistance, the 18th resistance of R18-, the 19th resistance of R19-, the 20th resistance of R20-, the 21st resistance of R21-, C1- first capacitor, The second capacitor of C2-, C3- third capacitor, the 4th capacitor of C4-, the 5th capacitor of C5-, D1- Schottky diode, the one or two pole D2- Pipe, the first light emitting diode of D3-, the second light emitting diode of D4-, D5- third light emitting diode, the second zener diode of D6-, D7- third zener diode, the first zener diode of D8-, E1- the first polarized capacitor, E2- the second polarized capacitor, E3- Three polarized capacitors, the first thermistor of PT1-, the second thermistor of PT2-, PT3- third thermistor, the first inductance of L1-, The second inductance of L2-, TVS3- Transient Suppression Diode, Q1- triode.

Specific embodiment

The utility model is further described below in conjunction with attached drawing:

As shown in Figure 1, a kind of industry WiFi expansion module, including main control singlechip, power circuit, WiFi interface circuit, One 485 interface circuit and the 2nd 485 interface circuit, the output end of the power circuit and the power end of main control singlechip connect It connects, the data transmit-receive end of the WiFi interface circuit and the first data transmit-receive end of main control singlechip connect, the WiFi Interface circuit configuration end and main control singlechip configuration end connect, the data transmit-receive end of the one 485 interface circuit with First data transmit-receive end of main control singlechip connects, the data transmit-receive end of the 2nd 485 interface circuit and main control singlechip The second data transmit-receive end connection.

The power circuit includes power management module and peripheral circuit, the power management module as shown in Figure 4 Ground terminal GND ground connection, feedback end FB is separately connected first resistor R1 in parallel and connects with the first end of second resistance R2, first The other end of resistance R1 and second resistance R2 ground connection, the Bootstrap port BST and switching node port SW of power management module Between be connected with first capacitor C1, also with Schottky diode D1's between the switching node port SW and first capacitor C1 Cathode and the first inductance L1 are in parallel, and the other end of the first inductance L1 is connect with the anode of the first polarized capacitor E1, and first has pole Property capacitor E1 cathode and Schottky diode D1 the common ground connection of anode, the anode of+24V input power and first diode D2 Connection, the power input Vin connection of the cathode and power management module of first diode D2, the cathode of first diode D2 is also It is connect with the second capacitor C2 in parallel, the second polarized capacitor E2,3rd resistor R3, the other end of 3rd resistor R3 and the 4th electricity Resistance R4 connected with the enable end EN of power management module, the 4th resistance R4, the second capacitor C2, the second polarized capacitor E2 it is another End ground connection；The anode of first polarized capacitor E1 is connect with the second inductance L2, and the first polarized capacitor E1's is positive also with the 5th Resistance R5 is connected with third capacitor C3, the feedback end FB of the other end and power management module of third capacitor C3 and the 5th resistance R5 The cathode of connection, the other end of the second inductance L2 and the first zener diode D8, the anode of third polarized capacitor E3, the 6th electricity Resistance R6 is connected with Surge Protector SJ1, and the other end of Surge Protector SJ1 is connect with voltage source VCC, the first zener diode D8 Anode connect with the cathode of third polarized capacitor E3 after be grounded, the other end of the 6th resistance R6 and the first light emitting diode D3 Anode connection, the first light emitting diode D3 cathode ground connection.

As shown in figure 5, the one 485 interface circuit includes RS485 transceiver and peripheral circuit, the RS485 The receiver output end RO of transceiver is connect with the 7th resistance R7, the other end of the 7th resistance R7 and bearing for the first photoelectrical coupler Pole connection, the anode of the first photoelectrical coupler are connect after connecting with the 4th capacitor C4 with 485 interface G485, the first photoelectrical coupler Collector and main control singlechip first receive data terminal RXD1 connection, the emitter of the first photoelectrical coupler is grounded, RS485 The driver input end of transceiver is connect with the collector of the second photoelectrical coupler, the emitter and G485 of the second photoelectrical coupler Connection, the anode of the second photoelectrical coupler are connect after connecting with the 8th resistance R8 with voltage source, the cathode of the second photoelectrical coupler Connect with the first sending data end TXD1 of main control singlechip, the collector of the first photoelectrical coupler also pass through the 9th resistance R9 with Voltage source VCC connection, the tenth resistance R10 are connected in parallel between the anode of the first photoelectrical coupler and the 4th capacitor C4, the tenth resistance The other end of R10 is connect with the collector of the second photoelectrical coupler, and the other end and eleventh resistor R11 of the tenth resistance R10 connects It connects, the other end of eleventh resistor R11 is connect with the base stage of triode Q1, the receiver enable end RE of RS485 transceiver and drive Connect after dynamic enable end DE connection with the collector of triode Q1, the emitter of triode Q1 is connect with the end 3.3V, the end 3.3V and The anode connection of photoelectric coupling switch, the emitter of photoelectric coupling switch are connected with switch, and the collector of photoelectric coupling switch connects The cathode on ground, photoelectric coupling switch is connect by twelfth resistor R12 with external one end for running enabled interface JK5, photoelectricity coupling The cathode of combination switch also passes through the 5th capacitor C5 and connect with the emitter of triode Q1, and the collector and RS485 of triode Q1 is received Send out and be connected with the 16th resistance R16 between the receiver enable end RE of device and driving enable end DE, the ground terminal of RS485 transceiver with It is connect after the other end connection of 16th resistance R16 with the second end of JK5, the other end of the 16th resistance R16 also connects with G485 It connects, the power end of RS485 transceiver is connect with the anode of the first photoelectrical coupler, the anode of the first photoelectrical coupler and the 4th electricity Hold C4 between also connect with the end 3.3V, the end 3.3V is also connect with thirteenth resistor R13, the other end of thirteenth resistor R13 and The non-return input of the recipient of RS485 transceiver is connected with the non-return output terminals A of driver, and the recipient of RS485 transceiver is non- Reversed input and the non-return output terminals A of driver are connect by the first thermistor PT1 with 485 Interface Terminal JK3, and RS485 is received The recipient of hair device is reversely inputted to be connected with the 14th resistance R14 and the 15th resistance R15 respectively with driver inverse output terminal B It connects, the other end of the 14th resistance R14 is connect with G485, and the other end of the 15th resistance R15 is connect with JK3, the 15th resistance It is also non-by the non-return input of the recipient of Transient Suppression Diode TVS3 and RS485 transceiver and driver between R15 and JK3 Inverse output terminal A connection.

As shown in fig. 6, the 2nd 485 interface circuit includes RS485 transceiver and peripheral circuit, RS485 transceiver The 21st resistance R21 connection of receiver output end RO, the other end of the 21st resistance R21 and the second light emitting diode D4 Cathode connection, the second light emitting diode D4 anode connect with voltage source VCC, the receiver output end RO of RS485 transceiver It is also connect with the second reception data terminal RXD2 of main control singlechip, the receiver enable end RE of RS485 transceiver and driving are enabled It is connect by the 17th resistance R17 with voltage source VCC after the DE connection of end, the receiver enable end RE of RS485 transceiver and driving Enable end DE is also connect with the enable end the RS485 RS485_EN2 of main control singlechip, the driver input end DI of RS485 transceiver It is connect with the 18th resistance R18, the other end of the 18th resistance R18 is connect with the cathode of third light emitting diode D5, third hair Optical diode D5 anode connect with voltage source VCC, the driver input end of RS485 transceiver also with main control singlechip second Sending data end TXD2 connection, the power end of RS485 transceiver are connect with voltage source VCC, voltage source VCC also with the 19th resistance R19 connection, the other end of the 19th resistance R19 and the non-return input of the recipient of RS485 transceiver and driver are non-return defeated Outlet A, the cathode of the second zener diode D6, the PT3 connection of third thermistor, the plus earth of the second zener diode D6, The non-return input of the recipient of RS485 transceiver and the non-return output terminals A of driver are connect with third thermistor PT3, third The other end of thermistor PT3 and the driving end of LCD module connect, and the recipient of RS485 transceiver reversely inputs and driver Inverse output terminal B is connect with the 20th resistance R20, third zener diode D7, the second thermistor PT2, the 20th resistance R20 Other end ground connection, the input terminal of the other end of the second thermistor PT2 and LCD module connects, the ground terminal ground connection of LCD module, Power supply termination+24V the power supply of LCD module.

As shown in Fig. 3 and Fig. 2, the data output end TXD1 of the WiFi interface circuit and the first number of main control singlechip According to output end TXD1 connection, the data input pin RXD1 of WiFi interface circuit and the first data input pin RXD1 of main control singlechip Connection, the configuration end CONFIG connection of configuration the end CONFIG and main control singlechip of WiFi interface circuit, WiFi interface circuit The status of wireless lan end STATUS WIFI connection of status of wireless lan end STATUS WIFI and main control singlechip, WiFi The end link_WiFi of interface circuit and the end link_WiFi of main control singlechip connect, the power end and voltage of WiFi interface circuit Source VCC connection.

Further, the first light emitting diode D3 is red light emitting diodes.

Further, the second light emitting diode D4 is green LED, and third light emitting diode D5 is red Color diode.

When using the WiFi expansion module of the application in control system is built, WiFi expansion module passes through WiFi interface electricity Subnet within the scope of road and system building is attached networking, then by 485 interface circuits of WiFi expansion module with it is existing The equipment for not having WiFi function carry out wire communication, the signal that 485 interface circuits receive is transferred to main control singlechip, main Control single-chip microcontroller control WiFi module carries out data and sends and receives, and realizes the wireless communication between remaining interior equipment of system.

Specific embodiment of the present utility model above described embodiment only expresses, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the protection scope of the utility model.

Claims

1. a kind of industry WiFi expansion module, it is characterised in that: including main control singlechip, power circuit, WiFi interface circuit, One 485 interface circuits and the 2nd 485 interface circuit, the output end of the power circuit and the power end of main control singlechip connect It connects, the data transmit-receive end of the WiFi interface circuit and the first data transmit-receive end of main control singlechip connect, the WiFi Interface circuit configuration end and main control singlechip configuration end connect, the data transmit-receive end of the one 485 interface circuit with First data transmit-receive end of main control singlechip connects, the data transmit-receive end of the 2nd 485 interface circuit and main control singlechip The second data transmit-receive end connection.

2. a kind of industry WiFi expansion module according to claim 1, it is characterised in that: the power circuit includes electricity Source control module and peripheral circuit, the ground terminal ground connection of the power management module, feedback end are separately connected in parallel first Resistance (R1) is connected with the first end of second resistance (R2), the other end ground connection of first resistor (R1) and second resistance (R2), electricity It is connected with first capacitor (C1) between the Bootstrap port and switching node port of source control module, the switching node end Mouth, first inductance (L1) also in parallel with the cathode of Schottky diode (D1) and the first inductance (L1) between first capacitor (C1) The anode of the other end and the first polarized capacitor (E1) connect, the cathode and Schottky diode of the first polarized capacitor (E1) (D1) the common ground connection of anode, input power are connect with the anode of first diode (D2), the cathode of first diode (D2) and The power input of power management module connects, the cathode of first diode (D2) also with the second capacitor (C2) in parallel, second Polarized capacitor (E2), 3rd resistor (R3) connection, the other end of 3rd resistor (R3) and the 4th resistance (R4) and power management The enable end of module connects, the other end ground connection of the 4th resistance (R4), the second capacitor (C2), the second polarized capacitor (E2)；The The anode of one polarized capacitor (E1) is connect with the second inductance (L2), the first polarized capacitor (E1) it is positive also with the 5th resistance (R5) it is connected with third capacitor (C3), the feedback of the other end and power management module of third capacitor (C3) and the 5th resistance (R5) The cathode of end connection, the other end of the second inductance (L3) and the first zener diode (D8), third polarized capacitor (E3) are just Pole, the 6th resistance (R6) are connected with Surge Protector, and the other end of Surge Protector is connect with voltage source, the first zener diode (D8) anode is grounded after connecting with the cathode of third polarized capacitor (E3), and the other end of the 6th resistance (R6) and first shines The anode connection of diode (D3), the cathode ground connection of the first light emitting diode (D3).

3. a kind of industry WiFi expansion module according to claim 1, it is characterised in that: the one 485 interface electricity Road includes RS485 transceiver and peripheral circuit, and the receiver output end of the RS485 transceiver and the 7th resistance (R7) are even It connects, the other end of the 7th resistance (R7) is connect with the cathode of the first photoelectrical coupler, the anode and the 4th of the first photoelectrical coupler It is connect after capacitor (C4) connection with 485 interfaces, the collector of the first photoelectrical coupler and the first of main control singlechip receive data End connection, the emitter ground connection of the first photoelectrical coupler, the driver input end of RS485 transceiver and the second photoelectrical coupler Collector connection, the emitter of the second photoelectrical coupler are connect with G485, anode and the 8th resistance of the second photoelectrical coupler (R8) it being connect after connecting with voltage source, the cathode of the second photoelectrical coupler and the first sending data end of main control singlechip connect, The collector of first photoelectrical coupler also passes through the 9th resistance (R9) and connect with voltage source, and the tenth resistance (R10) is connected in parallel on first Between the anode of photoelectrical coupler and the 4th capacitor (C4), the other end of the tenth resistance (R10) and the collection of the second photoelectrical coupler Electrode connection, the other end of the tenth resistance (R10) connect with eleventh resistor (R11), the other end of eleventh resistor (R11) and The base stage of triode (Q1) connects, the receiver enable end and driving enable end of RS485 transceiver connect after with triode (Q1) Collector connection, the emitter of triode (Q1) connect with the end 3.3V, the positive connection at the end 3.3V and photoelectric coupling switch, light The emitter of thermocouple combination switch is connected with switch, and the cathode of the grounded collector of photoelectric coupling switch, photoelectric coupling switch passes through Twelfth resistor (R12) is connect with external one end for running enabled interface, and the cathode of photoelectric coupling switch also passes through the 5th capacitor (C5) connect with the emitter of triode (Q1), the collector of triode (Q1) and the receiver enable end of RS485 transceiver and Driving is connected with the 16th resistance (R16) between enable end, and the ground terminal of RS485 transceiver is another with the 16th resistance (R16) It is connect after the connection of end with the second end of JK5, the other end of the 16th resistance (R16) is also connect with G485, the electricity of RS485 transceiver The anode of source and the first photoelectrical coupler connect, and and 3.3V between the anode of the first photoelectrical coupler and the 4th capacitor (C4) End connection, the end 3.3V are also connect with thirteenth resistor (R13), the other end of thirteenth resistor (R13) and connecing for RS485 transceiver The non-return input of receiver is connected with the non-return output end of driver, the non-return input of the recipient of RS485 transceiver and driver Non-return output end is connect by the first thermistor (PT1) with 485 Interface Terminals, and the recipient of RS485 transceiver is reversely defeated Enter and is connect respectively with the 14th resistance (R14) and the 15th resistance (R15) with driver inverse output terminal, the 14th resistance (R14) the other end is connect with G485, and the other end of the 15th resistance (R15) is connect with JK3, the 15th resistance (R15) and JK3 Between also inputted and driver is non-return defeated by the way that the recipient of Transient Suppression Diode (TVS3) and RS485 transceiver is non-return Outlet connection.

4. a kind of industry WiFi expansion module according to claim 1, it is characterised in that: the 2nd 485 interface electricity Road includes RS485 transceiver and peripheral circuit, and the 21st resistance (R21) of receiver output end of RS485 transceiver connects, the The other end of 21 resistance (R21) is connect with the cathode of the second light emitting diode (D4), and the second light emitting diode (D4) is just Pole is connect with voltage source, and the receiver output end of RS485 transceiver is also connect with the second reception data terminal of main control singlechip, It is connect by the 17th resistance (R17) with voltage source after the receiver enable end of RS485 transceiver and the connection of driving enable end, The receiver enable end and driving enable end of RS485 transceiver are also connect with the enable end RS485 of main control singlechip, and RS485 is received The driver input end of hair device is connect with the 18th resistance (R18), the other end and third light-emitting diodes of the 18th resistance (R18) The cathode connection of (D5) is managed, the anode of third light emitting diode (D5) is connect with voltage source, the driver input of RS485 transceiver End is also connect with the second sending data end of main control singlechip, and the power end of RS485 transceiver is connect with voltage source, and voltage source is also It is connect with the 19th resistance (R19), the non-return input of recipient of the other end and RS485 transceiver of the 19th resistance (R19) With the non-return output end of driver, the cathode of the second zener diode (D6), third thermistor (PT3) connection, the second pressure stabilizing The plus earth of diode (D6), the non-return input of the recipient of RS485 transceiver and the non-return output end of driver and third Thermistor (PT3) connection, the other end of third thermistor (PT3) and the driving end of LCD module connect, RS485 transceiver Recipient reversely input and driver inverse output terminal and the 20th resistance (R20), third zener diode (D7), second hot Quick resistance (PT2) connection, the other end ground connection of the 20th resistance (R20), the other end and LCD mould of the second thermistor (PT2) The input terminal of block connects, the ground terminal ground connection of LCD module, the power supply termination power of LCD module.

5. a kind of industry WiFi expansion module according to claim 1, it is characterised in that: the WiFi interface circuit The connection of first data output end of data output end and main control singlechip, the data input pin and master control monolithic of WiFi interface circuit First data input pin of machine connects, and the configuration end of WiFi interface circuit and the configuration end of main control singlechip connect, WiFi interface The status of wireless lan end of circuit and the status of wireless lan end of main control singlechip connect, and the WiFi of WiFi interface circuit connects The connecting pin WiFi for connecing end and main control singlechip connects, and the power end of WiFi interface circuit is connect with voltage source.

6. a kind of industry WiFi expansion module according to claim 2, it is characterised in that: first light emitting diode It (D3) is red light emitting diodes.

7. a kind of industry WiFi expansion module according to claim 4, it is characterised in that: second light emitting diode It (D4) is green LED, third light emitting diode (D5) is red diode.