CN212935923U

CN212935923U - Two-way buffer memory isolation type RS485 concentrator

Info

Publication number: CN212935923U
Application number: CN202022180558.6U
Authority: CN
Inventors: 高毅
Original assignee: Xi'an Likong Electronic Technology Co ltd
Current assignee: Xi'an Likong Electronic Technology Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-04-09
Anticipated expiration: 2030-09-28

Abstract

The utility model relates to a data communication technical field discloses a two way take buffer memory isolated form RS485 concentrators, include: the PCB board for support two RS485 main website equipment and one or more RS485 slave station device communication, be equipped with first communication port, second communication port and third communication port on the PCB board in proper order, first communication port all is connected with the RS485 main website with the second communication port, the third communication port is connected with the RS485 slave station, adopt the photoelectricity to keep apart between first communication port and the second communication port respectively and the third communication port, be equipped with the power source interface who is used for the input power on the PCB board, power source interface is located one side of third communication port. All be connected with the RS485 main website through first communication port and second communication port, the third communication port is connected with the RS485 slave station, because the PCB board has the data communication effect, can support two RS485 main website equipment and one or more RS485 slave station device communication, and then solved the communication conflict when two main websites communicate with the slave station simultaneously.

Description

Two-way buffer memory isolation type RS485 concentrator

Technical Field

The utility model relates to a data communication technical field especially relates to a two way take buffer memory isolated form RS485 concentrators.

Background

A hub is a connection device used in a local area network that has multiple ports to which multiple computers can be connected. In a local area network, a hub is usually used as a center, and all scattered workstations and servers are connected together to form a local area network system with a star structure. The advantage of a hub, in addition to being able to interconnect a plurality of terminals, is that when a line of one of the nodes fails, it does not affect the other nodes.

In the prior art, when two master stations communicate with a slave station at the same time, communication conflict is easily caused.

Therefore, how to solve the communication conflict when two master stations simultaneously communicate with the slave station becomes an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves lies in how to solve two main website simultaneously with the communication conflict when the slave station communicates.

Therefore, according to the first aspect, an embodiment of the present invention discloses a two-way isolation RS485 concentrator with cache, including: the PCB is used for supporting two RS485 master station devices to communicate with one or more RS485 slave station devices, a first communication port, a second communication port and a third communication port are sequentially arranged on the PCB, the first communication port and the second communication port are both connected with the RS485 master station, the third communication port is connected with the RS485 slave station, the first communication port and the second communication port are respectively in photoelectric isolation with the third communication port, a power supply interface used for inputting a power supply is arranged on the PCB, and the power supply interface is located on one side of the third communication port.

The utility model discloses further set up to, be equipped with the setting button that is used for setting up the concentrator function on the PCB board.

The utility model discloses further set up to, first communication mouth with the parallel side by side setting of second communication mouth.

The utility model discloses further set up to, power source is equipped with the protection of tying conversely that is used for protecting the concentrator.

The utility model discloses further set up to, be equipped with on the PCB board and be used for showing first communication indicator, the demonstration that is used for of the normal communication of first communication mouth second communication indicator and being used for showing the normal communication of third communication mouth third communication indicator.

The utility model discloses further set up to, first communication pilot lamp the second communication pilot lamp with the third communication pilot lamp is yellow pilot lamp.

The utility model discloses further set up to, it has ESD protection component and thunderbolt surge protection component to go up the electricity connection on the PCB board.

The utility model discloses further set up as, one side of third communication mouth is equipped with the ground connection port that is used for ground connection.

The utility model discloses following beneficial effect has: all be connected with the RS485 main website through first communication port and second communication port, the third communication port is connected with the RS485 slave station, because the PCB board has the data communication effect, can support two RS485 main website equipment and one or more RS485 slave station device communication, and then solved the communication conflict when two main websites communicate with the slave station simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a two-way RS485 hub with cache isolation according to this embodiment;

fig. 2 is a schematic diagram of a connection method for two RS485 master stations and one RS485 slave station in a two-way buffered isolated RS485 hub disclosed in this embodiment;

fig. 3 is a schematic diagram of a connection method for communication between two RS485 master stations and multiple RS485 slave stations in a two-way buffered isolated RS485 hub disclosed in this embodiment.

Reference numerals: 1. a PCB board; 2. a first communication port; 21. a first communication indicator light; 3. a second communication port; 31. a second communication indicator light; 4. a third communication port; 41. a third communication indicator light; 5. a power interface; 6. setting a key; 7. a ground port; 8. mounting holes; 9. and a power indicator lamp.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The embodiment of the utility model discloses two way take buffer memory isolated form RS485 concentrators, as shown in figure 1, figure 2 and figure 3, include: PCB board 1, PCB board 1 is used for supporting two RS485 main website equipment and one or more RS485 slave station device communication, be equipped with first communication port 2 on the PCB board 1 in proper order, second communication port 3 and third communication port 4, first communication port 2 all is connected with the RS485 main website with second communication port 3, third communication port 4 is connected with the RS485 slave station, adopt the photoelectricity to keep apart between first communication port 2 and second communication port 3 respectively and the third communication port 4, be equipped with power source 5 that is used for the input power on the PCB board 1, power source 5 is located one side of third communication port 4. In the specific implementation process, the PCB board 1 is provided with a mounting hole 8 for conveniently mounting the PCB board 1.

It should be noted that, the first communication port 2 and the second communication port 3 are both connected with the RS485 master station, and the third communication port 4 is connected with the RS485 slave station, and the PCB 1 has a data communication function, so that two RS485 master station devices can be supported to communicate with one or more RS485 slave station devices, and further, the communication conflict between the two master stations and the slave station during communication is solved.

It should be noted that, the interface between the master station and the slave station is transparent for data transmission, and the communication format and baud rate can be set by software. The application is suitable for the comprehensive RS485 communication system such as an automatic control system, a monitoring system, an alarm, an access control system, IC card charging, meter reading, an all-purpose card, parking lot charging and the like.

As shown in fig. 1, the PCB board 1 is provided with a setting button 6 for setting the hub function. In the specific implementation process, the setting key 6 has two functions:

1. the first communication indicator lamp 21 flickers and releases to enter a parameter configuration mode after long pressing for 3 seconds, the first communication port 2 is connected with a computer, parameters of the first communication port 2 can be set through software, and in the mode, the first communication port 2 can exit through software or the first communication port 2 indicator lamp is normally on and releases to exit after long pressing for 3 seconds;

2. the long press is 10 seconds (the first communication indicator lamp 21 can flicker after the long press is 3 seconds, the press is continued not to be loose at the moment), and the 3 communication indicator lamps are turned off after being normally turned on for 1 second to recover default parameters.

As shown in fig. 1, the first communication port 2 and the second communication port 3 are arranged in parallel side by side.

As shown in fig. 1, the power interface 5 is provided with reverse connection protection for protecting the hub. In the specific implementation process, the PCB board 1 is provided with a power indicator lamp 9 located at one side of the power interface 5. DC9-24V power supply input, and the power supply current is more than or equal to 0.5A. The voltage must not exceed 24V, otherwise the circuit will be damaged. The interface is marked with a plus connected with the positive pole of the power supply, and a minus connected with the negative pole of the power supply.

As shown in fig. 1, the PCB 1 is provided with a first communication indicator 21 for displaying normal communication of the first communication port 2, a second communication indicator 31 for displaying normal communication of the second communication port 3, and a third communication indicator 41 for displaying normal communication of the third communication port 4.

As shown in fig. 1, the first communication indicator lamp 21, the second communication indicator lamp 31, and the third communication indicator lamp 41 are all yellow indicator lamps.

As shown in fig. 1, an ESD protection element and a lightning surge protection element are electrically connected to the PCB board 1. In the specific implementation process, the ESD protection element and the lightning surge protection element play a role in protection, and can effectively isolate the damage of lightning and static electricity to the concentrator.

As shown in fig. 1, one side of the third communication port 4 is provided with a ground port 7 for grounding.

The working principle is as follows: through first communication port 2 and second communication port 3 all with RS485 main website be connected, third communication port 4 is connected with RS485 slave station, because PCB board 1 has the data communication effect, can support two RS485 main website equipment and one or more RS485 slave station device communication, and then solved the communication conflict when two main websites communicate with the slave station simultaneously.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A two-way isolation type RS485 hub with cache comprises: the PCB comprises a PCB (1) and is used for supporting two RS485 master station devices to communicate with one or more RS485 slave station devices, wherein a first communication port (2), a second communication port (3) and a third communication port (4) are sequentially arranged on the PCB (1), the first communication port (2) and the second communication port (3) are connected with the RS485 master station, the third communication port (4) is connected with the RS485 slave station, the first communication port (2) and the second communication port (3) are respectively in photoelectric isolation with the third communication port (4), a power supply interface (5) used for inputting a power supply is arranged on the PCB (1), and the power supply interface (5) is located on one side of the third communication port (4).

2. The two-way isolation-type RS485 hub with the buffer according to claim 1, wherein the PCB (1) is provided with a setting key (6) for setting the hub function.

3. The two-way cache isolated RS485 hub according to claim 1, wherein the first communication port (2) and the second communication port (3) are arranged in parallel side by side.

4. The two-way cache isolated RS485 hub according to claim 1, wherein the power interface (5) is provided with a reverse connection protection for protecting the hub.

5. The two-way band buffer isolation type RS485 hub according to claim 1 or 3, wherein a first communication indicator lamp (21) for displaying normal communication of the first communication port (2), a second communication indicator lamp (31) for displaying normal communication of the second communication port (3), and a third communication indicator lamp (41) for displaying normal communication of the third communication port (4) are arranged on the PCB (1).

6. The two-way isolation-type RS485 hub with cache according to claim 5, wherein the first communication indicator lamp (21), the second communication indicator lamp (31) and the third communication indicator lamp (41) are yellow indicator lamps.

7. The two-way cache-isolated RS485 hub according to claim 1, wherein an ESD protection element and a lightning surge protection element are electrically connected to the PCB (1).

8. The two-way isolation-with-cache RS485 hub according to claim 1 or 7, wherein one side of the third communication port (4) is provided with a ground port (7) for grounding.