CN210573267U

CN210573267U - RS485 concentrator

Info

Publication number: CN210573267U
Application number: CN201921238813.9U
Authority: CN
Inventors: 郑实; 黄燕
Original assignee: Chongqing Kunshan Electronic Technology Co Ltd
Current assignee: Chongqing Kunshan Electronic Technology Co Ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-05-19
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a RS485 concentrator, including control port module, main control module, a plurality of RS485 communication units and power module, the control port includes a plurality of control communication ports, the control port module with main control module's control signal end is connected, a plurality of RS485 communication units respectively with main control module's signal acquisition port is connected, main control module with a plurality of RS485 communication units respectively with power module connects. The utility model discloses a set up the control port module to set up a plurality of control communication ports on the control port module, make this RS485 concentrator can directly be controlled by a plurality of control terminal, and then realize the control to the mode of operation of RS485 concentrator and operating condition's control more conveniently, the suitability is strong.

Description

RS485 concentrator

Technical Field

The utility model relates to a communication equipment technical field especially relates to a RS485 concentrator.

Background

With the application of the 485 bus becoming more and more extensive, the 485 bus system also becomes larger and more complex. With the large and complex 485 bus systems, the stability of the 485 bus is also getting worse. These problems are best solved using a 485 hub. The RS485 concentrator is an integrated RS485 repeater, not only has the functions of amplifying signals and improving the driving capability of a bus, but also provides an integrated wiring function for users, so that the field wiring is tidy. When a network is constructed by the RS485 concentrator, the internal bus of the RS485 concentrator is communicated with a plurality of RS485 devices in parallel. An existing RS485 concentrator is generally provided with only one control signal communication interface, and when communication with two or more control terminals through the RS485 concentrator is needed, switching equipment is generally needed to be added between each communication terminal and the RS485 concentrator, so that the applicability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art at least, provide a RS485 concentrator very newly, can realize directly controlling the mode of concentrator through a plurality of control terminal, need not external switching equipment, the application scope of the RS485 concentrator of reinforcing greatly.

In order to realize the above object of the utility model, the utility model provides a RS485 concentrator, including control port module, main control module, a plurality of RS485 communication unit and power module, control port includes a plurality of control communication ports, control port module with main control module's control signal end is connected, a plurality of RS485 communication units respectively with main control module's signal acquisition port is connected, main control module with a plurality of RS485 communication units respectively with power module connects.

Preferably, the plurality of control communication ports of the control port module are the same or different.

Preferably, the control communication ports are all RS485 communication interfaces.

Preferably, the plurality of control communication ports comprise an RS485 communication interface and an RS232 communication interface, the RS232 communication interface is connected with an interface converter between the main control module, and the interface converter is used for converting the RS232 communication interface into the RS485 communication interface.

Preferably, the RS485 communication unit comprises an isolation power supply, an RS485 transceiver and an RS485 interface, the RS485 interface is connected with the RS485 transceiver, the RS485 transceiver is respectively connected with the main control module and the isolation power supply, and the isolation power supply is connected with the power supply module.

Preferably, the RS485 transceiver uses a MAX485 chip.

Preferably, the main control module adopts a PIC16CXX series single chip microcomputer.

Preferably, the power module includes a power interface, a voltage reduction circuit, a filter circuit and a voltage regulation circuit, which are connected in sequence.

The utility model provides a RS485 concentrator, including control port module, main control module, a plurality of RS485 communication unit and power module, the control port includes a plurality of control communication ports, the control port module with main control module's control signal end is connected, a plurality of RS485 communication units respectively with main control module's signal acquisition port is connected, main control module with a plurality of RS485 communication units respectively with power module connects. Through setting up the control port module to set up a plurality of control communication ports on the control port module, make this RS485 concentrator can directly be controlled by a plurality of control terminals, and then realize the control to the mode of operation of RS485 concentrator and the control of operating condition more conveniently, the suitability is strong.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an RS485 hub according to a preferred embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The utility model provides a RS485 concentrator, as shown in FIG. 1, this concentrator includes control port module, main control module, a plurality of RS485 communication unit and power module, and control port includes a plurality of control communication ports, and control port module is connected with main control module's control signal end, and a plurality of RS485 communication units are connected with main control module's signal acquisition port respectively, and main control module and a plurality of RS485 communication unit are connected with power module respectively.

The utility model discloses when using, a plurality of control communication ports with control port are connected with corresponding control terminal respectively, be connected a plurality of RS485 communication unit with outside RS485 interface device respectively, control the mode of concentrator and monitor the operating condition of concentrator through a plurality of control terminal, a plurality of RS485 communication units receive the control signal that master control module sent and carry out the data acquisition to outside RS485 interface device, and return master control module with the data of gathering, thereby realize the control to multichannel RS485 interface device. The main control module is communicated with each RS485 communication unit, namely, receives data sent by each RS485 communication unit and sends data to each RS485 communication unit; meanwhile, the main control module is also used for controlling each RS485 communication unit to be in a data receiving state or a data sending state.

In this embodiment, the plurality of control communication ports of the control port module may be the same or different. The configuration of the specific control communication port can be properly configured according to actual needs, and a plurality of control communication ports of the control port module can be completely the same, partially the same or different, so that the concentrator can be directly connected with the control terminals of different communication interfaces.

In some preferred embodiments of the present invention, the plurality of control communication ports are RS485 communication interfaces. The arrangement enables all control communication ports in the control port module to be connected with the control terminal provided with the RS485 communication interface.

The utility model discloses an in other preferred embodiments, a plurality of control communication ports include RS485 communication interface and RS232 communication interface, still are connected with the interface converter between RS232 communication interface and the master control module, and the interface converter is used for converting RS232 communication interface into RS485 communication interface. Through setting up RS232 communication interface, the concentrator of being convenient for can be with the control terminal lug connection who disposes RS232 communication interface, controls and monitors the operating condition of concentrator.

In this embodiment, the RS485 communication unit includes an isolation power supply, an RS485 transceiver and an RS485 interface, the RS485 interface is connected with the RS485 transceiver, the RS485 transceiver is connected with the master control module and the isolation power supply respectively, and the isolation power supply is connected with the power supply module. Dispose the peripheral equipment of RS485 interface through RS485 interface connection, send main control module's control command through the RS485 transceiver, and the data message that receives peripheral equipment to send is to main control module, all adopts independent isolation power supply to supply power through every RS485 interface to this realizes the communication isolation between the different RS485 interfaces, avoids having the problem of common mode voltage interference.

In this embodiment, the RS485 transceiver uses a MAX485 chip. The MAX485 chip is a low power transceiver manufactured by Maxim corporation for RS-485 and RS-422 communication. Each device has a driver and a receiver. The MAX485 driver slew rate is not limited and can achieve the highest transmission rate of 2.5 Mbps. These transceivers draw between 120 mua and 500 mua of supply current in either an unloaded or fully loaded state with the drivers disabled. All devices operate on a single power supply of 5V. The driver has a short circuit current limit and can place the driver output in a high impedance state through a thermal shutdown circuit. The receiver input has a failsafe characteristic that ensures a logic high output when the input is open. The anti-interference performance is high. MAX485 performance-price ratio is high, and is high-quality, can be suitable for with carry out data transceiver function in this application.

In this embodiment, the main control module is a PIC16CXX series single chip microcomputer. The PIC16CXX series single chip microcomputer is a high-performance RISC structure CPU, an upper reset circuit is arranged in the CPU, a power-on timer and an oscillation starting timer can guarantee the upper reset circuit to be normal and establish stable oscillation, and the power consumption is low. The PIC16C923 can be selected for use specifically, and the PIC16C923 is equipped with 25 two-way independently programmable I/O lines and 25~27 one-way input ports lines, and the control signal that receives control terminal in this application of suitability controls each RS485 communication unit's operating condition.

In this embodiment, the power module includes a power interface, a voltage reduction circuit, a filter circuit, and a voltage regulator circuit, which are connected in sequence. The power supply interface is connected with an external power supply, and the external power supply is connected with the external power supply through the voltage reduction circuit, the filtering circuit for filtering clutter and the voltage stabilizing circuit in sequence to stabilize the voltage required by the main control module and the isolation power supply, so that stable working voltage is provided for the main control module and the isolation power supply.

The RS485 concentrator that this embodiment provided, including control port module, master control module, a plurality of RS485 communication unit and power module, the control port includes a plurality of control communication ports, and the control port module is connected with master control module's control signal end, and a plurality of RS485 communication units are connected with master control module's signal acquisition port respectively, and master control module and a plurality of RS485 communication unit are connected with power module respectively. Through setting up the control port module to set up a plurality of control communication ports on the control port module, make this RS485 concentrator can directly be controlled by a plurality of control terminals, and then realize the control to the mode of operation of RS485 concentrator and the control of operating condition more conveniently, the suitability is strong.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An RS485 concentrator is characterized by comprising a control port module, a main control module, a plurality of RS485 communication units and a power module, wherein the control port module comprises a plurality of control communication ports, the control port module is connected with a control signal end of the main control module, the plurality of RS485 communication units are respectively connected with a signal acquisition port of the main control module, and the main control module and the plurality of RS485 communication units are respectively connected with the power module; wherein the content of the first and second substances,

the control communication ports of the control port module are the same or different:

when a plurality of control communication ports of the control port module are the same, the control communication ports are all RS485 communication interfaces;

work as a plurality of control communication ports of control port module are different, a plurality of control communication ports include RS485 communication interface and RS232 communication interface, RS232 communication interface with still be connected with the interface converter between the master control module, the interface converter is used for converting RS232 communication interface into RS485 communication interface.

2. The RS485 hub according to claim 1, wherein the RS485 communication unit comprises an isolation power supply, an RS485 transceiver and an RS485 interface, the RS485 interface is connected with the RS485 transceiver, the RS485 transceiver is respectively connected with the main control module and the isolation power supply, and the isolation power supply is connected with the power supply module.

3. The RS485 hub according to claim 2, wherein the RS485 transceiver uses a MAX485 chip.

4. The RS485 hub according to claim 1, wherein the master control module is a PIC16CXX series single chip microcomputer.

5. The RS485 hub according to claim 1, wherein the power module comprises a power interface, a voltage reduction circuit, a filter circuit and a voltage regulation circuit connected in sequence.