CN209543326U

CN209543326U - A kind of isolated form one drags four RS-485 hubs

Info

Publication number: CN209543326U
Application number: CN201920109176.9U
Authority: CN
Inventors: 梁宏舍; 曾海新; 刘燕杏; 甘志海
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2019-10-25
Anticipated expiration: 2029-01-23

Abstract

The utility model discloses a kind of isolated forms one to drag four RS-485 hubs, including main control chip, main RS-485 chip, main RS-232 chip, from RS-485 chip, DC-DC power source conversion chip, isolated from power chip and light-coupled isolation chip, it is described to be each directly connected to from RS-485 chip with main control chip, the main RS-485 chip is indirectly connected with by three light-coupled isolation chips with main control chip, the main RS-232 chip is indirectly connected with by two light-coupled isolation chips with main control chip, the isolated from power chip is connect with four from RS-485 chip and main control chip.The isolated form one drags four RS-485 hubs to reduce data processing time delay to which transmission speed be greatly improved；Reduce collision problem when large number of equipment deployment and mass data transmission；Additional independent used RS-232 interface, provides the redundant interface under full load conditions, when necessary, can one RS-232 interface of multiple access equipment, can reduce entirety industrial control system construction cost.

Description

A kind of isolated form one drags four RS-485 hubs

Technical field

The utility model relates to hub technology field, specially a kind of isolated form one drags four RS-485 hubs.

Background technique

In fields such as Industry Control, power communication, intelligence instruments, a large amount of equipment for using RS-485 interface are limited to control The limitation of device communication interface quantity and price processed, it will usually expand the communication interface number of controller using RS-485 hub Amount.With industrial intelligent, number of devices increases, and communication need increases, and a large amount of RS-485 communication apparatus will lead to RS-485 Bus collision increases significantly, to substantially reduce the communication efficiency of RS-485 bus and the availability of equipment.

The different RS-485 hub of existing multiclass.

It is divided according to buffering method, being divided into has buffer-type and without buffer-type.Buffer-type RS-485 hub is to solve When large number of equipment is communicated, equipment, which occupies bus, to be caused largely to receive and dispatch collision problem.In contrast, when hub cascade is excessive When, data are slower when being transferred to tail portion from head device.

It is different according to isolation, it is divided into isolated form and non-isolation type, isolated form hub its anti-interference, system stability is more Height, avoid because between master-slave equipment earth potential difference and electrostatic, lightning stroke and surge damage caused by RS485 master-slave equipment, together When also effectively avoid master-slave equipment end earth potential difference and equipment room generate ground circulation damage caused by RS485 equipment Evil.In contrast, the RS-485 hub cost of isolated form is higher.

In general, these hubs can all be additionally provided the main RS-232 interface of one with main RS-485 interface mutual exclusion, The host of conveniently accessible RS-232 interface, same time main RS-485 interface and main RS-232 interface can only use one.At present These hubs mostly use low speed single-chip microcontroller or design without main control chip, cause both solution conflict and transmission speed cannot be simultaneous ?.

Utility model content

The purpose of this utility model is to provide a kind of isolated forms one to drag four RS-485 hubs, to solve above-mentioned background skill The problem of being proposed in art.

To achieve the above object, the utility model provides the following technical solutions: a kind of isolated form one drags four RS-485 line concentrations Device, including main control chip, main RS-485 chip, main RS-232 chip, from RS-485 chip, DC-DC power source conversion chip, power supply Isolating chip and light-coupled isolation chip, described to be each directly connected to from RS-485 chip with main control chip, the main RS-485 Chip is indirectly connected with by three light-coupled isolation chips with main control chip, and the main RS-232 chip passes through two light-coupled isolation cores Piece is indirectly connected with main control chip, and the isolated from power chip is connect with four from RS-485 chip and main control chip, the DC- DC power supply conversion chip is connect with main RS-485 chip, main RS-232 chip and isolated from power chip.

Preferably, it is described from the quantity of RS-485 chip be four.

Preferably, the quantity of the light-coupled isolation chip is five.

Preferably, the main control chip uses STM32F103RCT6 chip.

Preferably, the main control chip built in hardware UART communication processing unit.

Preferably, the main RS-485 chip and from the differential data input pin of RS-485 chip access TVS transient state suppression Diode processed is to protect RS-485 chip.

Compared with prior art, the utility model has the beneficial effects that the isolated form one drags the reduction of four RS-485 hubs Data processing time delay is to be greatly improved transmission speed；Reduce collision problem when large number of equipment deployment and mass data transmission； Additional independent used RS-232 interface, provides the redundant interface under full load conditions, when necessary, can multiple access one The equipment of a RS-232 interface can reduce whole industrial control system construction cost.

Detailed description of the invention

Fig. 1 is the overall structure block diagram of the utility model；

Fig. 2 is the main RS-485 chip partial circuit schematic diagram of the utility model；

Fig. 3 is the main RS-232 chip partial circuit schematic diagram of the utility model；

Fig. 4 is the DC-DC power source conversion chip partial circuit schematic diagram of the utility model；

Fig. 5 is the isolated from power chip partial circuit schematic diagram of the utility model；

Fig. 6 is the RS-485 chip part of module circuit general principle figure of the utility model.

In figure: 100 main control chips, 110 main RS-485 chips, 111 main RS-232 chips, 130 from RS-485 chip, 150DC-DC power conversion chip, 120 isolated from power chips, 140/141/142/143/144 light-coupled isolation chip.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ", The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" be based on Orientation or positional relationship shown in the drawings is merely for convenience of description the utility model, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

Please refer to Fig. 1-6, the utility model provides a kind of technical solution: a kind of isolated form one drags four RS-485 hubs, Including main control chip 100, main RS-485 chip 110, main RS-232 chip 111, from RS-485 chip 130, DC-DC power source conversion Chip 150, isolated from power chip 120 and light-coupled isolation chip 140 are each straight from RS-485 chip equal 130 and main control chip 100 It connects in succession, the use STM32F103RCT6 chip of main control chip 100,100 built in hardware UART communication processing unit of main control chip, It is four from the quantity of RS-485 chip 130, main RS-485 chip 110 passes through three light-coupled isolation chips 140 and main control chip 100 are indirectly connected with, and the quantity of light-coupled isolation chip 140 is five, the transmitting of light-coupled isolation chip 140/141/142/143/144 Pole is connect with the VCC of DC-DC power source conversion chip 150, and emitter is connect with isolator GND_OC, anode and isolated from power chip 120 Vout+ pin connection, main RS-232 chip 111 pass through between two light-coupled isolation chips 143/144 and main control chip 100 It connects in succession, isolated from power chip 120 is connect with four from RS-485 chip 130 and main control chip 100, main RS-485 chip 110 And from the differential data input pin of RS-485 chip 130 access TVS Transient Suppression Diode to protect RS-485 chip, DC- DC power supply conversion chip 150 is connect with main RS-485 chip 110, main RS-232 chip 111 and isolated from power chip 120, main RS- DE and the RE pin of 485 chips 110 and connecing is connect with the collector pin of light-coupled isolation chip 141 afterwards, D pin and light-coupled isolation The collector pin of chip 142 connects, and R pin is connect with the collector pin of light-coupled isolation chip 140, main RS-232 chip 111 TIN pin is connect with the collector pin of light-coupled isolation chip 144, the current collection of TOUT pin and light-coupled isolation chip 143 The connection of pole pin, one group of UART pin TX of main control chip 100 are connect with the cathode of light-coupled isolation chip 142, and RX is isolated with coupling The cathode of chip 140 connects, and a GPIO pin is connect with the cathode of light-coupled isolation chip 141, and one group of main control chip 100 UART pin TX is connect with the cathode of light-coupled isolation chip 144, and RX is connect with the cathode of coupling isolating chip 143, main control chip 100 Four groups of UART pin TX connect respectively with four from the D pin of RS-485 chip 130, RX pin is respectively with four from RS-485 The R pin of chip 130 connects, and the VDD pin of main control chip 100 is connect with the Vout+ pin of isolated from power chip 120, and VSS draws Foot is connect with the Vout- pin of isolated from power chip 120.

When the utility model is specifically implemented: main control chip 100 is STM32F103RCT6 chip, using up to 72MHz's Working frequency configuration, since all data are handled and forwarded by main control chip 100, so the performance of main control chip 100 The higher the better, and high performance main control chip can promote the speed of data processing and forwarding.Main control chip 100 can be STM32F103RCT6 chip, or other main control chips 100, it is pair that the type of main control chip 100, which should not be construed, The limitation of the application.

Wherein, main control chip 100 is responsible for handling and caching in real time main RS-485 chip 110, main RS-232 chip 111, four A data packet transmitted from RS-485 chip 130.The bus occupancy situation of each interface is detected, and in the feelings of each bus free The transmission data packet that the bus is not yet sent is reissued under condition.Have benefited from the large capacity buffering built in the main control chip 100 RAM can substantially reduce the data collision in the case of large number of equipment is largely received and dispatched and lose problem.

Specifically, main RS-485 chip 110 passes through light-coupled isolation chip 140/141/142/ with main RS-232 chip 111 143/144 connect with main control chip 100, is different from the scheme implementation of existing RS-485 hub, existing RS-485 line concentration The scheme of device is realized using main RS-485 and main RS-232 exclusive mode, cannot be worked independently, and main RS-485 chip herein 110 realize autonomous working with main RS-232 chip 111, concurrently use.To allow main RS-232 the main port RS-485, from The port RS-485 full load still can independently access a RS-232 equipment, can reduce whole industrial control system construction cost.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of isolated form one drags four RS-485 hubs, including main control chip (100), main RS-485 chip (110), main RS- 232 chips (111), from RS-485 chip (130), DC-DC power source conversion chip (150), isolated from power chip (120) and optocoupler Isolating chip (140), it is characterised in that: it is described to be each directly connected to from RS-485 chip (130) with main control chip (100), The main RS-485 chip (110) is indirectly connected with by three light-coupled isolation chips (140) with main control chip (100), the master RS-232 chip (111) is indirectly connected with by two light-coupled isolation chips (140) with main control chip (100), the isolated from power Chip (120) is connect with four from RS-485 chip (130) and main control chip (100), the DC-DC power source conversion chip (150) it is connect with main RS-485 chip (110), main RS-232 chip (111) and isolated from power chip (120).

2. a kind of isolated form one according to claim 1 drags four RS-485 hubs, it is characterised in that: described from RS-485 The quantity of chip (130) is four.

3. a kind of isolated form one according to claim 1 drags four RS-485 hubs, it is characterised in that: the light-coupled isolation The quantity of chip (140) is five.

4. a kind of isolated form one according to claim 1 drags four RS-485 hubs, it is characterised in that: the main control chip (100) STM32F103RCT6 chip is used.

5. a kind of isolated form one according to claim 1 drags four RS-485 hubs, it is characterised in that: the main control chip (100) built in hardware UART communication processing unit.

6. a kind of isolated form one according to claim 1 drags four RS-485 hubs, it is characterised in that: the main RS-485 Chip (110) and from the differential data input pin of RS-485 chip (130) access TVS Transient Suppression Diode to protect RS- 485 chips.