CN210405352U

CN210405352U - RS485 changes ethernet equipment

Info

Publication number: CN210405352U
Application number: CN201922280248.9U
Authority: CN
Inventors: 李怀君; 刘福权; 柳辉
Original assignee: Individual
Current assignee: 95913 unit of the Chinese PLA
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-04-24
Anticipated expiration: 2029-12-18

Abstract

The utility model discloses a RS485 changes ethernet equipment, including host system, power module, LCM module, reset module, RS485 module, network module and clock module, host system's first signal output part is connected with network module's signal input part, host system's second signal output part is connected with clock module's signal input part, host system's third signal output part is connected with RS485 module's signal input part, host system's first signal input part is connected with network module's signal output part, host system's second signal input part is connected with clock module's signal output part, host system's third signal input part is connected with RS485 module's signal input part. RS485 change ethernet equipment can be very convenient inserts the commercial power, adopt quartzy first net twine to insert, very convenient, the audio-visual display IP address visits this equipment through the browser, can change this equipment IP and gateway address.

Description

RS485 changes ethernet equipment

Technical Field

The utility model relates to an electronic information technical field particularly, relates to a RS485 changes ethernet equipment.

Background

In the operation process of a plurality of devices and devices, temperature and humidity values of positions of the devices and the devices need to be acquired so as to take corresponding device actions or avoid dangerous temperature and humidity environments. At present, temperature and humidity sensors sold in the market do not have a 220V alternating current interface, and when a plurality of temperature and humidity sensors are required to perform distributed detection and a wireless mode is forbidden, the wiring of an RS485 transmission mode is difficult.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a RS485 changes ethernet equipment, the access commercial power that can be very convenient adopts quartzy first net twine to insert, and is very convenient, and this equipment of audio-visual display IP address is visited through the browser, can change this equipment IP and gateway address.

In order to achieve the above object, the utility model adopts the following technical scheme: an RS 485-to-Ethernet device comprises a main control module, a power supply module, an LCM module, a reset module, an RS485 module, a network module and a clock module, wherein a first signal output end of the main control module is connected with a signal input end of the network module, a second signal output end of the main control module is connected with a signal input end of the clock module, a third signal output end of the main control module is connected with a signal input end of the RS485 module, a first signal input end of the main control module is connected with a signal output end of the network module, a second signal input end of the main control module is connected with a signal output end of the clock module, a third signal input end of the main control module is connected with a signal input end of the RS485 module, a fourth signal input end of the main control module is connected with a signal output end of the power supply module, and a fifth signal input end of the main control module is connected with a signal, the sixth signal input end of the main control module is connected with the signal output end of the reset module, the electric energy input end of the power supply module is connected with 220V alternating current, the RS485 module is directly connected and communicated through a crystal head network cable, and the network module is connected with external communication through a TCP/IP protocol.

In the structure, 220V mains supply passes through power module and inserts this equipment, become 5V direct current through power module, wherein one of them direct current becomes 3.3V and gives the master control module power supply, the inside PLL circuit of clock module can adjust the equipment clock, make equipment functioning speed faster, the module that resets realizes the control and the manual operation that resets to the power, the network module carries out networking information interaction through TCP/IP protocol and outside wireless communication, conveniently receive outside IP and the gateway address change instruction that conveys, RS485 adopts quartzy first net twine transmission information, can insert 256 485 subassemblies, the display module is used for realizing the demonstration of IP address, prevent to be unable to visit because of forgetting the IP address.

Preferably, the power supply module comprises an AC-DC switch and a voltage stabilizing chip for changing the voltage.

The 220V alternating current is changed into 5V voltage through the AC-DC switch, the 5V voltage is transmitted in two paths, one path is supplied to the network module, and the other path outputs 3.3V voltage through the voltage stabilizing chip to supply power to the main control module.

Preferably, the network module comprises a DM9000 interface chip for connection communication.

The DM9000 interface chip is a single chip fast ethernet MAC controller with an 10/100M adaptive PHY and 4K DWORD SRAM for the purpose of tolerability of 3.3V and 5V with low power consumption and high performance, and provides a media independent interface for all home phone line network devices or other transceivers that provide the functionality to support the media independent interface, the DM9000 chip supports 8-bit, 16-bit and 32-bit interfaces to access internal memory, the DM9000 physical protocol layer interface completely supports the use of 3-type, 4-type and 5-type unshielded twisted pair under 10MBps and 5-type unshielded twisted pair under 100MBps, completely conforms to the IEEE 802.3u specification, and the automatic coordination function of the DM9000 physical protocol layer interface automatically completes the configuration to be suitable for the line bandwidth to the maximum extent, and also supports the IEEE 802.3x full-duplex flow control, so that a user can easily transplant a port driver under any system.

Preferably, the RS485 module includes an ADM2587E chip for three-dimensional isolation and two RJ45 jacks for wiring.

The serial port of the main control module realizes RS485 communication through an ADM2587E chip with three-dimensional isolation, and the P0.4 pin of the main control module is an enabling end.

The utility model has the advantages that:

(1) the utility model discloses a RS485 changes ethernet equipment can very convenient access commercial power, adopts quartzy first net twine 568B line preface to insert, and is very convenient, and the audio visual display IP address prevents to be unable to visit because of forgetting the IP address, visits this equipment through the browser, can change this equipment IP and gateway address;

(2) and the RS485 communication three channels are isolated, interference design is adopted, and 256 cascades are realized.

Drawings

Fig. 1 is a block diagram illustrating the structure of an RS 485-to-ethernet device according to the present invention;

fig. 2 is a schematic circuit diagram of a clock module in the RS 485-to-ethernet device according to the present invention;

fig. 3 is a schematic circuit diagram of a reset module in the RS 485-to-ethernet device according to the present invention;

fig. 4 is a schematic circuit diagram of a power module in an RS 485-to-ethernet device according to the present invention;

fig. 5 is a schematic circuit diagram of an LCM module in an RS 485-to-ethernet device according to the present invention;

fig. 6 is a schematic circuit diagram of a network module in the RS 485-to-ethernet device according to the present invention;

fig. 7 is a schematic circuit diagram of an RS485 module in an RS 485-to-ethernet device according to the present invention.

Description of reference numerals:

1. a main control module; 2. a clock module; 3. a reset module; 4. a power supply module; 5. an LCM module; 6. an RS485 module; 7. and a network module.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1-7, an RS 485-to-ethernet device includes a main control module 1, a power supply module 4, an LCM module 5, a reset module 3, an RS485 module 6, a network module 7, and a clock module 2, where a core processor S3C2440 of the main control module 1 is a low-power consumption, highly integrated 16/32-bit RISC processor designed by Samsung corporation, and it adopts 272-pin FBGA package, providing a solution of a low-price, low-power consumption, high-performance small microcontroller for handheld devices and general-type applications. The notable feature of the S3C2440 is that its CPU core is an 16/32 bit ARM920T RISC processor. ARM920T implements MMU, ambababus, and Harvard cache architectures. This architecture has independent 16kB instruction caches and 16kB data caches, each consisting of 8 word long lines (lines). By providing a complete set of system peripherals, the S3C2440 can greatly reduce the overall system cost without the need to configure additional components for the system. The maximum working frequency reaches 500MHz, and the MMU (memory management unit) is arranged, so that the processor can easily run in operating systems such as Windows CE, Linux and the like, and can perform more complex information processing. The clock module 2 directly adopts an external crystal oscillator, the reset module 3 adopts a special monitoring reset chip MAX811S, the model of the display module 6RS4855LCM is LCM1603, and the GPB interface of the main control module 1 is directly connected with the LCM1603 interface to realize the display of the IP address. The first signal output end of the main control module 1 is connected with the signal input end of the network module 7, the second signal output end of the main control module 1 is connected with the signal input end of the clock module 2, the third signal output end of the main control module 1 is connected with the signal input end of the RS485 module 6, the first signal input end of the main control module 1 is connected with the signal output end of the network module 7, the second signal input end of the main control module 1 is connected with the signal output end of the clock module 2, the third signal input end of the main control module 1 is connected with the signal input end of the RS485 module 6, the fourth signal input end of the main control module 1 is connected with the signal output end of the power module 4, the fifth signal input end of the main control module 1 is connected with the signal output end of the LCM module 5, the sixth signal input end of the main control module 1 is connected with the signal output end of the reset module 3, the RS485 module 6 is directly connected and communicated by a crystal head network cable, and the network module 7 is connected with external communication by a TCP/IP protocol.

The power supply module 4 includes an AC-DC switch and a voltage stabilization chip for varying the magnitude of voltage. The model of the voltage stabilizing chip is AS2815-3.3, 220V alternating current is changed into 5V voltage through an AC-DC switch, the 5V voltage is transmitted in two paths, one path is used for supplying power to the network module 7, and the other path outputs 3.3V voltage through the voltage stabilizing chip to supply power to the main control module 1.

The network module 7 comprises a DM 900010/100M interface chip for connection communication.

The RS485 module 6 includes an ADM2587E chip for three-way isolation and two RJ45 jacks for wiring. The serial port of the main control module 1 realizes RS485 communication through an ADM2587E chip with three-way isolation, and two RJ45 sockets are adopted in a wiring mode.

In the structure, a mains supply 220V is connected into the device through a power supply module 4, the system needs 3.3V and 5V voltages, 220V alternating current outputs 5V voltage through an AC-DC switch and filtering, the 5V voltage is transmitted in two paths, one path is transmitted to a network module 7, the other path is output to 3.3V through a voltage stabilizing chip and supplies power to a main control module 1, an internal PLL circuit of a clock module 2 can adjust a device clock to enable the device to run faster, a reset module 3 realizes monitoring and manual reset operation on the power supply, the network module 7 carries out networking information interaction with external wireless communication through a TCP/IP protocol to conveniently receive IP and gateway address change instructions transmitted from the outside, RS485 adopts a crystal head network cable to transmit information and can be connected into 256 485 components, the main control module 1 receives address information transmitted by the RS485 module 6 and displays the address information on a display module 6RS4855LCM after processing, meanwhile, information data exchange is achieved with the outside through the network module 7, the IP address is convenient to change, the display module 6RS4855LCM is used for displaying the IP address, and the situation that the IP address cannot be accessed due to forgetting of the IP address is avoided.

At present, the mainstream embedded real-time operating systems include Windows CE series (including pocket PC), VxWorks and embedded Linux. Compared with Windows CE and VxWorks, Linux used as an embedded operating system has the following advantages: the user can cut the Linux system according to the requirement, which is a very important characteristic for a special terminal system with strict requirements on functions, reliability, volume, cost and power consumption; can be used for various hardware platforms; linux is open source software, and is flexible to use and low in development cost.

The Linux version used by the device is Linux 2.6.30. And a driver and an application program are developed under the LINUX environment, the development driver comprises RS485 transmission control and LCM1602 display, and the application program comprises a built-in user specification program, an IP address changing program, a multi-user RS485 communication server communication program and the like.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. An RS 485-to-Ethernet device is characterized by comprising a main control module, a power supply module, an LCM module, a reset module, an RS485 module, a network module and a clock module, wherein a first signal output end of the main control module is connected with a signal input end of the network module, a second signal output end of the main control module is connected with a signal input end of the clock module, a third signal output end of the main control module is connected with a signal input end of the RS485 module, a first signal input end of the main control module is connected with a signal output end of the network module, a second signal input end of the main control module is connected with a signal output end of the clock module, a third signal input end of the main control module is connected with a signal input end of the RS485 module, a fourth signal input end of the main control module is connected with a signal output end of the power supply module, and a fifth signal input end of the main control module is connected with a signal output, the sixth signal input end of the main control module is connected with the signal output end of the reset module, the electric energy input end of the power supply module is connected with 220V alternating current, the RS485 module is directly connected and communicated through a crystal head network cable, and the network module is connected with external communication through a TCP/IP protocol.

2. The RS485 to Ethernet device of claim 1, wherein the power module comprises an AC-DC switch and a voltage regulation chip for changing the voltage level.

3. The RS485 to Ethernet device of claim 2, wherein the network module comprises a DM9000 interface chip for connection communication.

4. The RS485 to Ethernet device of claim 3 wherein the RS485 module comprises an ADM2587E chip for three-way angular isolation and two RJ45 jacks for wiring.