CN214751440U - DDC controller based on daisy chain networking - Google Patents

Abstract

The utility model discloses a DDC controller based on daisy chain networking, including the casing, the casing both sides are equipped with the expansion board, constitute inner groovy structure bottom between expansion board and the casing and be equipped with the wiring board, are equipped with the wiring mouth on the wiring board, at inside DI-digital input module, the general input module of UI-analog quantity/digital quantity, ethernet communication module, RS485 communication module, the general output module of UO-analog quantity/digital quantity, DO-digital quantity output module and the power module of being equipped with of casing. The controller adopts the concave wiring port to connect equipment, so that the connection of a large amount of data is facilitated; in addition, the RS485 communication interface is adopted, the number of IO ports of the controller can be expanded, the operation screen is accessed, local control is facilitated, two paths of switch network ports are arranged in the controller, and a networking structure of daisy chain topology can be formed, so that the purchase cost of switches, cables and the like in field application and even a large amount of labor cost can be saved.

Description

DDC controller based on daisy chain networking

Technical Field

The utility model relates to a DDC controller technical field specifically is a DDC controller based on daisy chain networking.

Background

For the traditional ethernet communication interface controller, the networking mode usually adopts a star topology structure, i.e. all the controllers are connected to a centralized switch device, which inevitably increases the purchase cost of switches, cables, etc., and even a large amount of labor cost. Therefore, in order to solve the problem, it is necessary to improve the communication interface part of the conventional ethernet interface controller, and develop a controller capable of implementing a daisy-chained topology networking structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a DDC controller based on daisy chain networking, on realizing that traditional DDC controller is to equipment control, operation function's basis, improve its ethernet interface part, change original ethernet net gape into two embedded switch net gapes for can form daisy chain topological structure between the controller, thereby be connected to a plurality of ethernet equipment in the network, with the problem of proposing in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a DDC controller based on daisy chain networking comprises a shell, expansion boards are arranged on two sides of the shell, an inner groove structure is formed between the expansion boards and the shell, a wiring board is arranged at the bottom of the inner groove, a wiring port is arranged on the wiring board, a DI-digital input module is fixed at the left side of the front part in the shell through a screw, a UI-analog quantity/digital quantity universal input module is arranged at the right side of the DI-digital quantity input module, an Ethernet communication module is arranged at the right side of the UI-analog quantity/digital quantity universal input module, an RS485 communication module is arranged on the rear side of the Ethernet communication module, a UO-analog quantity/digital quantity universal output module is arranged on the left side of the RS485 communication module, a DO-digital quantity output module is arranged on the left side of the UO-analog quantity/digital quantity universal output module, and a power supply module is arranged on the left side of the DO-digital quantity output module; the DI-digital input module, the UI-analog quantity/digital quantity universal input module, the Ethernet communication module, the RS485 communication module, the UO-analog quantity/digital quantity universal output module, the DO-digital quantity output module and the power supply module are all fixed on the inner wall of the shell through screws, and the DI-digital input module, the UI-analog quantity/digital quantity universal input module, the Ethernet communication module, the RS485 communication module, the UO-analog quantity/digital quantity universal output module, the DO-digital quantity output module and the power supply module are all in linear connection with the wiring port.

Preferably, the connection port is divided into an Ethernet communication interface 1, an Ethernet communication interface 2, an RS485 communication interface 1, an RS485 communication interface 2, a DI1 input, a DI2 input, a DI3 input, a DI4 input, a DI5 input, a DI6 input, a DI7 input, a DI8 input, a UI1 input, a UI2 input, a UI3 input, a UI4 input, a UO4 output, a DO4 output and a power supply, the Ethernet communication interface 1 is an Ethernet 4, the Ethernet communication interface 2 is an Ethernet 4, the RS485 communication interface 1 includes a 4 and a B4, the RS485 communication interface 2 includes a 4 and DI4 inputs, the DI communication interface includes a common GND and DI inputs, the common input includes GND and the common input, the common input of the common GND and the common input of the common GND, the DI input includes DI and GND, DI and DI share GND, the UI input includes UI and GND, the UO output includes UO + and UO-, the DO output includes NO and COM, the power supply includes DC + and DC-.

Preferably, the circuit of the UI-analog/digital universal input module includes: the circuit comprises a jumper pin for selecting the type of an input signal, a voltage division resistor, a current limiting resistor, a filter capacitor, a TVS (transient voltage suppressor), a reference voltage circuit and an A/D (analog/digital) conversion circuit.

Preferably, the circuitry of the DI-digital input module includes: TVS tube, clamping diode, divider resistance, filter capacitance, clamping diode and buffer circuit.

Preferably, the UO-analog/digital universal output module circuit includes: the device comprises a D/A conversion circuit, an operational amplifier circuit, a light emitting diode, a TVS (transient voltage suppressor), a protection diode, a jumper pin for selecting DO/AO (DO/AO) output, a photoelectric coupler, a power tube, an anti-series diode, a divider resistor and a filter capacitor.

Preferably, the DO-digital output module circuit includes: the circuit comprises a Darlington transistor array, a light emitting diode, a relay, a pull-down resistor and an arc extinguishing capacitor.

Preferably, the ethernet communication module circuit includes: switch chip, communication transformer, RJ45 terminal, crystal oscillator, electric capacity, resistance.

Preferably, the RS485 communication module circuit includes: RS485 transceiver, TVS pipe, from restoring fuse, emitting diode and resistance, electric capacity.

Preferably, the power module circuit includes: the circuit comprises a self-reset fuse, a rectifier bridge, a voltage dependent resistor, an inductor, a 24V-to-12V isolation power supply, a 12V-to-3.3V power supply, a 12V-to-5V power supply, a resistor, a capacitor and an inductor.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. this DDC controller based on daisy chain networking adopts indent formula wiring mouth to connect equipment, makes things convenient for the connection of a large amount of data, and has guard action such as dustproof, anticreep.

2. This DDC controller based on daisy chain networking adopts RS485 communication interface all the way, can expand the IO mouth quantity of controller.

3. This DDC controller based on daisy chain networking, the RS485 communication interface of accessible all the way inserts the operation screen, makes things convenient for locally to control.

4. The DDC controller based on the daisy chain networking is internally provided with two paths of switch network ports, and can form a networking structure of daisy chain topology, so that the purchase cost of switches, cables and the like in field application and even a large amount of labor cost can be saved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of the point A of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the inside of the housing of the present invention;

fig. 4 is a schematic diagram of a DI-digital input interface circuit according to the present invention;

FIG. 5 is a schematic diagram of a UI interface circuit of the present invention;

fig. 6 is a schematic diagram of the UO interface circuit of the present invention;

fig. 7 is a schematic diagram of the DO-digital output module of the present invention;

fig. 8 is a schematic diagram of an ethernet interface circuit according to the present invention;

fig. 9 is a schematic diagram of an RS485 interface circuit of the present invention;

fig. 10 is a schematic diagram of a power supply circuit according to the present invention.

In the figure: 101. a housing; 102. a wiring port; 103. a wiring board; 104. an expansion board; 105. a DI-digital input module; 106. UI-analog quantity/digital quantity universal input module; 107. an Ethernet communication module; 108. an RS485 communication module; 109. UO-analog quantity/digital quantity universal output module; 110. a DO-digital output module; 111. and a power supply module.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a DDC controller based on daisy chain networking includes a housing 101, expansion boards 104 are disposed on two sides of the housing 101, an inner groove structure is formed between the expansion boards 104 and the housing 101, a wiring board 103 is disposed at the bottom of the inner groove, a wiring port 102 is disposed on the wiring board 103, the wiring port 102 is divided into an Ethernet communication interface 1, an Ethernet communication interface 2, an RS485 communication interface 1, an RS485 communication interface 2, a DI1 input, a DI2 input, a DI3 input, a DI4 input, a DI5 input, a DI6 input, a DI7 input, a DI8 input, a UI1 input, a UI2 input, a UI3 input, a UI4 input, a UI5 input, a UI6 input, a UO1 output, a UO2 output, a DO2 output, an Ethernet communication interface 2, an Ethernet communication interface for Ethernet communication, an Ethernet communication interface 2, and an Ethernet communication interface for an RS 485B 72, RS485 port 2 includes A and B, DI input includes DI and GND, DI and DI share GND, DI input includes DI and GND, DI and DI share GND, UI input includes UI and GND, UI output includes UI and GND, UO output includes UO + and UO-, DO output includes NO and COM, the DO4 output includes NO4 and COM1, the DO5 output includes NO5 and COM1, and the power supply includes DC24+ and DC 24-.

In the above embodiment, the expansion board 104 is arranged on the two sides of the casing 101, the expansion board 104 and the casing 101 are integrally connected to form an inner groove structure, the wiring board 103 in the inner groove can be dustproof and protected, and five wiring ports 102 are arranged on the wiring board 103, wherein 8 DI of the wiring ports 102, 6 UI, 5 UO, 5 DO, 2 ethernet ports, 2 RS485 communication ports, 1 power interface, and the equipment is connected, so that connection control of multiple devices can be guaranteed, and the use is convenient.

Referring to fig. 3-4, a DI-digital input module 105 is fixed to the left side of the front portion inside the casing 101 by screws, and the DI-digital input module 105 includes a TVS tube VP13, a diode VD16, voltage dividing resistors R98 and R99, a light emitting tube HL8, a filter capacitor C59, and a buffer circuit chip D7.

Specifically, when the DI terminal is not short-circuited with the GND terminal, the level of the incoming 74LCX541 buffer chip is a 5V high level signal, and the DI port indicator lamp HL8 is not turned on; when the DI terminal is short-circuited with the GND terminal, a 5V high level signal is divided by resistors R88 and R99 to generate a low level signal of about 1.3V to enter a 74LCX541 buffer chip, and an indicator lamp HL8 of the DI port is lightened; the 74LCX541 buffer chip has two functions, the first function is to convert the 5VTTL level signal input by the DI port into a CMOS level signal with 3.3V level which can be accessed to the CPU, and the first function is to perform level conversion; the second function is to isolate the input DI signal from the CPU to a certain extent, so as to protect the CPU; the TVS tube VP13 may act as surge protection for the DI port.

Referring to fig. 3 and 5, a UI-analog/digital universal input module 106 is disposed at the right side of the DI-digital input module 105, and the UI-analog/digital universal input module 106 includes: the TVS tube VP2, the input signal type selection jumper X3, the reference voltage chips N12 and N13, the A/D conversion chip D5, a plurality of voltage dividing resistors, a plurality of filter capacitors and the like.

Specifically, the input signal type is selected through a jumper X3; when 1 and 2 of X3 are short-circuited, the input signal type is 0-10V voltage signal, and the input 0-10V voltage signal is divided by R40 and R41 to generate 0-4.096V voltage signal to enter an A/D conversion chip; when 3 and 4 of X3 are in short circuit, the input signal type is 0-20mA current signal, and the input current signal flows through a resistor R39 and is converted into a voltage signal of 0-4V to enter an A/D conversion chip; when 5 and 6 of X3 are short-circuited, the input signal type is PT1000 platinum resistance signal, at this time, the reference voltage REF5V is divided by the resistor connected in parallel with R37 and R38 and the PT1000 platinum resistance of the access port, and a voltage signal of 0-4.096V is generated and enters the A/D conversion chip; when the X3 is not short-circuited, the input signal type is NTC10K resistor, and at the moment, the reference voltage REF5V is subjected to voltage division by the resistor R37 and the NTC10K of the access port to generate a voltage signal of 0-4.096V to enter the A/D conversion chip; the REF5V reference voltage was generated by reference voltage chip TLC 431; the A/D conversion chip is an MCP3208 chip with 12-bit resolution and is connected with the CPU by an SPI interface; the reference voltage of the A/D conversion chip is 4.096V and is generated by MCP 1541; the TVS pipe VP2 plays a role in preventing lightning surge to the UI port.

Referring to fig. 3 and 6, an ethernet communication module 107 is disposed on the right side of the UI-a/D universal input module 106, and the ethernet communication module 107 mainly includes a switch chip D10, two communication transformers N13 and N14, two RJ45 terminals XT10 and XT11, and a plurality of resistors, capacitors, magnetic beads, and the like.

Specifically, the ethernet circuit main chip adopts KSZ8863RLL, which is a three-port switch chip, wherein port 3 can work in RMII PHY mode or RMII MAC mode, and in this application, port 3 works in RMII PHY mode, and is used for being connected to the RMII MAC interface of the CPU to transmit and receive ethernet packets; the other two ports, i.e. the ports 2 and 3, are provided with built-in PHY modules, and can be directly connected to the ethernet communication transformer H1102HL, so as to perform data communication with other ethernet devices; because the switch engine is arranged in the switch chip, after the switch chip is correctly set by the CPU, the data can be received and automatically forwarded among the three ports, so that the daisy chain topology networking function between the controller and other Ethernet equipment can be realized; the CPU sets a register inside the switch chip via the I2C bus.

Referring to fig. 3 and 7, an RS485 communication module 108 is disposed at the rear side of the ethernet communication module 107, and the RS485 communication module 108 includes an RS485 communication transceiver D9, TVS tubes VP21, VP22, and a light emitting diode HL2, i.e., a plurality of resistors and capacitors.

Specifically, the RS485 transceiver chip is ISL3172E, the light emitting diode is used for indicating the communication state of the 485 communication port, and the two TVS tubes are used for lightning surge protection of the communication port.

Referring to fig. 3 and 8, a UO-a/D universal output module 109 is disposed on the left side of the RS485 communication module 108, and a circuit of the UO-a/D universal output module 109 includes a D/a converter D6, an operational amplifier N5, a double diode VD6, an output mode selection jumper X9, a photocoupler N7, a power transistor VT1, a reverse-string diode VD11, a TVS transistor VP8, a light emitting diode, a plurality of resistors, capacitors, and the like.

Specifically, the D/A conversion chip is an AD5318 with 12-bit resolution, and the chip is communicated with the CPU through an SPI interface; the reference voltage of the D/A chip is 5V, so the voltage range which can be output by the D/A chip is 0-5V, and after the D/A chip is amplified by the operational amplifier MC33204VDR2G, a voltage signal of 0-10V can be generated; when the output mode jumper X9 is set to AO output mode, the output of the operational amplifier is directly connected to the UO port; when the output mode jumper X9 is set to DO output, the output of the operational amplifier is connected to the input end of the photocoupler TLP181, and then the output end of the TLP181 is connected to the UO port through a power tube BSP75N, and at this time, a 24V dc intermediate relay needs to be externally connected to the UO port to continuously drive other switching value devices; the light emitting diode is used for indicating the state of the output port, the TVS tube is used for protecting the output port from lightning surge, and the double diodes are used for protecting the output port from overvoltage.

Referring to fig. 3 and 9, a DO-digital output module 110 is disposed on the left side of the UO-adc/digital-adc general output module 109, and a circuit of the DO-digital output module 110 includes a darlington transistor array chip D8, a relay K1, an arc extinguishing capacitor C84, a light emitting diode HL16, and a plurality of current limiting resistors.

Specifically, a switching value signal output by a pin of the CPU is subjected to power amplification through a darlington transistor array chip ULN2003N, so as to drive a 12V direct-current relay coil and control the opening and closing of a relay contact; the light emitting diode is used for indicating the output state of the DO port, and the arc extinguishing capacitor is used for protecting the relay contact.

Referring to fig. 3 and 10, a power module 111 is disposed on the left side of the DO-digital output module 110; the power module 111 circuit comprises a self-reset fuse F1, a rectifier bridge U1, a DC-DC isolation power module N1, a DC-DC power chip N2, a three-terminal voltage-stabilized power chip N3, a plurality of resistors, inductors, capacitors and the like.

Specifically, a 24V direct current or alternating current power supply accessed to a power supply terminal is rectified by a rectifier bridge and then converted into a 12V direct current power supply through a DC-DC isolation power supply module VRB2412YMD-6WR2, wherein the 12V direct current power supply is mainly used for power supply of a DO port relay control and an AO port operational amplifier and is used as the input of a DC-DC power supply chip MCP16301 and a three-terminal stabilized power supply chip LM 7805; the DC-DC power supply chip MCP16301 is used for converting 12V input power supply voltage into 3.3V output power supply and supplying power to a controller CPU and other digital circuit chips; the three-terminal voltage-stabilizing power supply chip LM7805 is used for converting a 12V input power supply into a 5V output power supply and supplying power for the DI port, the UI port and the UO port.

In the above embodiment, the DI-digital input module 105, the UI-analog/digital universal input module 106, the ethernet communication module 107, the RS485 communication module 108, the UO-analog/digital universal output module 109, the DO-digital output module 110, and the power supply module 111 are all fixed on the inner wall of the housing 101 by screws, and the DI-digital input module 105, the UI-analog/digital universal input module 106, the ethernet communication module 107, the RS485 communication module 108, the UO-analog/digital universal output module 109, the DO-digital output module 110, and the power supply module 111 are all linearly connected to the wire connection port 102.

The working principle is as follows: when the DDC controller based on the daisy chain networking is needed to be used, the DDC controller is fixed through the shell 101, the expansion board 104 and the shell 101 form an inner groove structure to fix the wiring board 103, the stability of fixing the wiring board 103 is ensured, and various abundant wiring ports 102 are adopted for connecting equipment; the controller collects and calculates the operation data of various field devices through the DI port, the DO port, the UI port and the UO port, and controls the operation data; the controller expands two RS485 communication interfaces, one of which can be used for accessing some IO port modules of standard protocols to expand the number of IO ports of the controller, and the other one is used for accessing an HMI operation screen, thereby facilitating local control of the controller; 2 switch network ports are embedded in the controller, a daisy chain topological structure can be formed, a plurality of Ethernet devices are connected to the network, and compared with the traditional star network, various costs, such as purchase cost of switches, cables and the like, and even a large amount of labor cost can be greatly reduced.

It is noted that, herein, relational terms such as first and second, and the like may be 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. A DDC controller based on daisy chain networking, comprising a housing (101), characterized in that: expansion boards (104) are arranged on two sides of the shell (101), an inner groove structure is formed between each expansion board (104) and the shell (101), a wiring board (103) is arranged at the bottom of the inner groove, a wiring port (102) is arranged on each wiring board (103), a DI-digital input module (105) is fixed on the left side of the front portion inside the shell (101) through screws, a UI-analog quantity/digital quantity universal input module (106) is arranged on the right side of the DI-digital quantity input module (105), an Ethernet communication module (107) is arranged on the right side of the UI-analog quantity/digital quantity universal input module (106), an RS485 communication module (108) is arranged on the rear side of the Ethernet communication module (107), a UO-analog quantity/digital quantity universal output module (109) is arranged on the left side of the RS485 communication module (108), a digital quantity output module (110) is arranged on the left side of the UO-analog quantity/digital quantity universal output module (109), a power supply module (111) is arranged on the left side of the DO-digital quantity output module (110); the digital-to-digital converter is characterized in that the DI-digital input module (105), the UI-analog/digital universal input module (106), the Ethernet communication module (107), the RS485 communication module (108), the UO-analog/digital universal output module (109), the DO-digital output module (110) and the power supply module (111) are fixed on the inner wall of the shell (101) through screws, and the DI-digital input module (105), the UI-analog/digital universal input module (106), the Ethernet communication module (107), the RS485 communication module (108), the UO-analog/digital universal output module (109), the DO-digital output module (110) and the power supply module (111) are all in linear connection with the wiring port (102).

2. The daisy-chain networking based DDC controller of claim 1 wherein: the wiring port (102) is divided into an Ethernet communication interface 1, an Ethernet communication interface 2, an RS485 communication interface 1, an RS485 communication interface 2, a DI1 input, a DI2 input, a DI3 input, a DI4 input, a DI5 input, a DI6 input, a DI7 input, a DI8 input, a UI1 input, a UI2 input, a UI3 input, a UI4 input, a UO4 output, a DO4 output and a power supply, the Ethernet communication interface 1 is an Ethernet 4, the Ethernet communication interface 2 is an Ethernet 4, the RS485 communication interface 1 comprises an A4 and a B4, the RS485 communication interface 2 comprises an DI4 and DI4, the DI4 input comprises a DI GND and a DI4, the DI4 input comprises a GND, the DI4 and the DI4 input and the DI4 include GND, the GND and the DI4, the DI4 include GND, the GND and the GND, the DI4 and the DI4 input and the DI4 include GND, the GND and the GND, the DI4 include GND, the GND and the GND, the DI4, the GND and the DI4 include GND, the GND and the GND, the DI4, the GND, the DI4 include GND and the GND, the DI4 include GND, the GND and the GND, the GND are shared DI4, the GND and the GND, the DI4 input and the GND, the DI4 include GND, the GND and the GND include GND, the DI4, the DI input includes DI and GND, DI and DI share GND, the UI input includes UI and GND, the UO output includes UO + and UO-, the DO output includes NO and COM, the power supply includes DC + and DC-.

3. The daisy-chain networking based DDC controller of claim 1 wherein: the circuit of the UI-analog quantity/digital quantity universal input module (106) comprises: the circuit comprises a jumper pin for selecting the type of an input signal, a voltage division resistor, a current limiting resistor, a filter capacitor, a TVS (transient voltage suppressor), a reference voltage circuit and an A/D (analog/digital) conversion circuit.

4. The daisy-chain networking based DDC controller of claim 1 wherein: the circuitry of the DI-digital input module (105) comprises: TVS tube, clamping diode, divider resistance, filter capacitance, clamping diode and buffer circuit.

5. The daisy-chain networking based DDC controller of claim 1 wherein: the UO-analog quantity/digital quantity universal output module (109) circuit comprises: the device comprises a D/A conversion circuit, an operational amplifier circuit, a light emitting diode, a TVS (transient voltage suppressor), a protection diode, a jumper pin for selecting DO/AO (DO/AO) output, a photoelectric coupler, a power tube, an anti-series diode, a divider resistor and a filter capacitor.

6. The daisy-chain networking based DDC controller of claim 1 wherein: the DO-digital output module (110) circuit comprises: the circuit comprises a Darlington transistor array, a light emitting diode, a relay, a pull-down resistor and an arc extinguishing capacitor.

7. The daisy-chain networking based DDC controller of claim 1 wherein: the Ethernet communication module (107) circuitry comprises: switch chip, communication transformer, RJ45 terminal, crystal oscillator, electric capacity, resistance.

8. The daisy-chain networking based DDC controller of claim 1 wherein: the RS485 communication module (108) circuit comprises: RS485 transceiver, TVS pipe, from restoring fuse, emitting diode and resistance, electric capacity.

9. The daisy-chain networking based DDC controller of claim 1 wherein: the power supply module (111) circuit comprises: the circuit comprises a self-reset fuse, a rectifier bridge, a voltage dependent resistor, an inductor, a 24V-to-12V isolation power supply, a 12V-to-3.3V power supply, a 12V-to-5V power supply, a resistor, a capacitor and an inductor.

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