CN101883037B - RS485 bus short circuit isolator - Google Patents
RS485 bus short circuit isolator Download PDFInfo
- Publication number
- CN101883037B CN101883037B CN2010102186168A CN201010218616A CN101883037B CN 101883037 B CN101883037 B CN 101883037B CN 2010102186168 A CN2010102186168 A CN 2010102186168A CN 201010218616 A CN201010218616 A CN 201010218616A CN 101883037 B CN101883037 B CN 101883037B
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- data transceiver
- active
- transceiver module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses an RS485 bus short circuit isolator, which relates to the technical field of communication and solves the problem of short circuit isolation among branches of common RS485 bus-based firefighting. The RS485 bus short circuit isolator comprises a first electrical interface, a short circuit automatic isolating module of a passive signal and a second electrical interface, wherein the short circuit automatic isolating module of the passive signal comprises a drive trigger unit, a switch drive unit and an RS485 bus switch unit. The RS485 bus short circuit isolator can also adopt the following structure that: the isolator comprises the first electrical interface, an active front end data transceiver module, an active rear end data transceiver module, an automatic transceiver control module, the second electrical interface and a voltage-stabilizing power supply module. The invention is applied to an RS485 bus firefighting network.
Description
Technical field
The present invention relates to communication technique field, be specifically related to a kind of RS485 bus short circuit isolator.
Background technology
At present, in the networking of RS485 bus, during a certain branch, short-circuit; Can whole bus network short circuit be caused other branch road communication failure, in addition; When the industry wiring of long distance, the device on the RS485 bus is very easy to be struck by lightning, because stored charge; Electrical potential difference, factor such as surge voltage and destroying.
Summary of the invention
At present commonly used to cause the problem of communication failure because of a certain branch, short-circuit causes the equal short circuit of each branch road of whole bus network in order solving, to the invention provides a kind of RS485 bus short circuit isolator based on RS485 bus Fire Net.
A kind of RS485 bus short circuit isolator of the present invention; It comprises first electric interfaces, the automatic isolation module of passive signal short circuit and second electric interfaces; The automatic isolation module of said passive signal short circuit comprises driving trigger element, switch drive unit and RS485 bus switch module
The signal and communication end of first electric interfaces is connected with signal input part that drives trigger element and the first signal and communication end of RS485 bus switch module simultaneously; The signal output part of said driving trigger element is connected with the signal input part of switch drive unit; The signal output part of said switch drive unit is connected with the signal input part of RS485 bus switch module; The secondary signal communication terminal of said RS485 bus switch module is connected with the signal and communication end of second electric interfaces
Drive trigger element, be used to the switch drive unit drive signal is provided;
The switch drive unit; Be used for when RS485 bus operate as normal, the drive signal that receives being amplified; And then driving RS485 bus switch module; Make the conducting of said driving RS485 bus switch module, also be used for when the RS485 bus is short-circuited, RS485 bus switch module and RS485 bus are broken off;
RS485 bus switch module is used under the driving of switch drive unit, and transmission RS485 bus signals also is used for when the RS485 bus is short-circuited, and under the driving of switch drive unit, isolates with the RS485 bus.
The present invention also provides another kind of RS485 bus short circuit isolator; To solve the RS485 bus transfer apart from weak point, the restricted problem of load number; It comprises first electric interfaces, active front end data transceiver module, active Back end data transceiver module, receives and dispatches control module, second electric interfaces and power module of voltage regulation automatically
The signal and communication end of first electric interfaces is connected with the first signal and communication end of active front end data transceiver module; The secondary signal communication terminal of said active front end data transceiver module is connected with the signal input part of receiving and dispatching control module automatically with the first signal and communication end of active Back end data transceiver module respectively; The signal input part of said automatic transmitting-receiving control module also is connected with the first signal and communication end of active Back end data transceiver module; The controlled end of said active front end data transceiver module is connected with first control end of receiving and dispatching control module automatically; Second control end of said automatic transmitting-receiving control module is connected with the controlled end of active Back end data transceiver module; The secondary signal communication terminal of said active Back end data transceiver module is connected with the signal and communication end of second electric interfaces; The power input that the power output end of power module of voltage regulation is received and dispatched control module respectively with the power input of the power input of active front end data transceiver module, active Back end data transceiver module, automatically is connected
Said active front end data transceiver module is used for receiving and dispatching automatically under the control of control module, receives or send data;
Said active Back end data transceiver module is used for receiving and dispatching automatically under the control of control module, sends or receive data;
Said automatic transmitting-receiving control module is used to control active front end data transceiver module and active Back end data transceiver module and carries out Data Receiving or data transmission.
Beneficial effect of the present invention: the invention provides a kind of RS485 bus short circuit isolator; Electric and Signal Spacing between its control for the networking of RS485 bus, multinode, the load capacity that increases the RS485 bus network, the antijamming capability that increases the RS485 bus, bus branch all has well suitable; Particularly when the networking of RS485 bus, during the total short circuit of a certain branch road, can be with whole bus network short circuit; Cause other branch road communication failure; Using the present invention can address this problem completely, and when a certain branch road bus was short-circuited, isolator of the present invention can be isolated away it from bus network automatically automatically; After short trouble is got rid of, can automatically this branch road be connected into bus network; Alternative plan of the present invention provides relaying for the RS485 bus network, can improve the transmission range of RS485 bus, and improves the load capacity of bus.
Description of drawings
Fig. 1 is the structural representation of a kind of RS485 bus short circuit isolator of the present invention, and Fig. 2 is the structural representation of the automatic isolation module 13 of passive signal short circuit of the present invention, and Fig. 3 is the structural representation of automatic transmitting-receiving control module 4 of the present invention.
Embodiment
Embodiment one: specify this execution mode according to Figure of description 1 and 2; The described a kind of RS485 bus short circuit isolator of this execution mode; It comprises first electric interfaces 11, the automatic isolation module 13 of passive signal short circuit and second electric interfaces 12; The automatic isolation module 13 of said passive signal short circuit comprises driving trigger element 13-1, switch drive unit 13-2 and RS485 bus switch module 13-3
The signal and communication end of first electric interfaces 11 is connected with signal input part that drives trigger element 13-1 and the first signal and communication end of RS485 bus switch module 13-3 simultaneously; The signal output part of said driving trigger element 13-1 is connected with the signal input part of switch drive unit 13-2; The signal output part of said switch drive unit 13-2 is connected with the signal input part of RS485 bus switch module 13-3; The secondary signal communication terminal of said RS485 bus switch module 13-3 is connected with the signal and communication end of second electric interfaces 12
Drive trigger element 13-1, be used to switch drive unit 13-2 drive signal is provided;
Switch drive unit 13-2; Be used for when RS485 bus operate as normal, the drive signal that receives being amplified; And then driving RS485 bus switch module 13-3; Make said driving RS485 bus switch module 13-3 conducting, also be used for when the RS485 bus is short-circuited, RS485 bus switch module 13-3 and RS485 bus are broken off;
RS485 bus switch module 13-3 is used under the driving of switch drive unit 13-2, and transmission RS485 bus signals also is used for when the RS485 bus is short-circuited, and under the driving of switch drive unit 13-2, isolates with the RS485 bus.
Embodiment two: this execution mode is with the difference of embodiment one; This execution mode also comprises power module of voltage regulation 14 and the anti-surge module 9 of first lightning protection; The first signal and communication end of the anti-surge module 9 of said first lightning protection is connected with the signal and communication end of first electric interfaces 11; The secondary signal communication terminal of the anti-surge module 9 of said first lightning protection is connected with signal input part that drives trigger element 13-1 and the first signal and communication end of RS485 bus switch module 13-3 simultaneously, and the power output end of said power module of voltage regulation 14 is connected with the power input of the anti-surge module 9 of the first lightning protection lightning protection.
Embodiment three: this execution mode is with embodiment one or two difference; This execution mode comprises that also second lightning protection prevents surge module 10; The first signal and communication end of the anti-surge module 10 of said second lightning protection is connected with the secondary signal communication terminal of RS485 bus switch module 13-3; The secondary signal communication terminal of the anti-surge module 10 of said second lightning protection is connected with the signal and communication end of second electric interfaces 12, and the power output end of power module of voltage regulation 14 also is connected with the power input of the anti-surge module 10 of said second lightning protection.
Embodiment four: this execution mode is that first electric interfaces 11 and second electric interfaces 12 in the embodiment one, two or three are the RS485 interface to the further specifying of embodiment one, two or three.
Embodiment five: specify this execution mode according to Figure of description 1; The described a kind of RS485 bus short circuit isolator of this execution mode; It comprises first electric interfaces 11, active front end data transceiver module 5, active Back end data transceiver module 6, receives and dispatches control module 4, second electric interfaces 12 and power module of voltage regulation 14 automatically
The signal and communication end of first electric interfaces 11 is connected with the first signal and communication end of active front end data transceiver module 5; The secondary signal communication terminal of said active front end data transceiver module 5 is connected with the signal input part of receiving and dispatching control module 4 automatically with the first signal and communication end of active Back end data transceiver module 6 respectively; The signal input part of said automatic transmitting-receiving control module 4 also is connected with the first signal and communication end of active Back end data transceiver module 6; The controlled end of said active front end data transceiver module 5 is connected with first control end of receiving and dispatching control module 4 automatically; Second control end of said automatic transmitting-receiving control module 4 is connected with the controlled end of active Back end data transceiver module 6; The secondary signal communication terminal of said active Back end data transceiver module 6 is connected with the signal and communication end of second electric interfaces 12; The power input that the power output end of power module of voltage regulation 14 is received and dispatched control module 4 respectively with the power input of the power input of active front end data transceiver module 5, active Back end data transceiver module 6, automatically is connected
Said active front end data transceiver module 5 is used for receiving and dispatching automatically under the control of control module 4, receives or send data;
Said active Back end data transceiver module 6 is used for receiving and dispatching automatically under the control of control module 4, sends or receive data;
Said automatic transmitting-receiving control module 4 is used to control active front end data transceiver module 5 and active Back end data transceiver module 6 and carries out Data Receiving or data transmission.
Embodiment six: the difference of this execution mode and embodiment five is that this execution mode also comprises the first electrical isolation module 1, the second electrical isolation module 2 and the 3rd electrical isolation module 3; The first signal and communication end of the said first electrical isolation module 1 is connected with the secondary signal communication terminal of active front end data transceiver module 5; The secondary signal communication terminal of the said first electrical isolation module 1 is connected with the first signal and communication end of active Back end data transceiver module 6, and the signal output part of the said first electrical isolation module 1 is connected with the signal input part of receiving and dispatching control module 4 automatically; The signal input part of the said second electrical isolation module 2 is connected with first control end of receiving and dispatching control module 4 automatically, and the signal output part of the said second electrical isolation module 2 is connected with the controlled end of active front end data transceiver module 5; The signal input part of said the 3rd electrical isolation module 3 is connected with second control end of receiving and dispatching control module 4 automatically, and the signal output part of said the 3rd electrical isolation module 3 is connected with the controlled end of active Back end data transceiver module 6;
Said electrical isolation module 1 is used to exchange the data from active front end data transceiver module 5 and active Back end data transceiver module 6, and realizes the electrical isolation between said two transceiver modules;
Said electrical isolation module 2 is used for receiving and dispatching automatically the electrical isolation of 5 of control module 4 and active front end data transceiver modules;
Said electrical isolation module 3 is used for receiving and dispatching automatically the electrical isolation of 6 of control module 4 and active front end data transceiver modules.
Embodiment seven: this execution mode is with embodiment five or six difference; This execution mode comprises that also first lightning protection prevents surge module 9; The first signal and communication end of the anti-surge module 9 of said first lightning protection is connected with the signal and communication end of first electric interfaces 11, and the secondary signal communication terminal of the anti-surge module 9 of said first lightning protection is connected with the first signal and communication end of active front end data transceiver module 5.
Embodiment eight: this execution mode is with embodiment five, six or seven difference; This execution mode comprises that also second lightning protection prevents surge module 10; The first signal and communication end of the anti-surge module 10 of said second lightning protection is connected with the secondary signal communication terminal of active Back end data transceiver module 6, and the secondary signal communication terminal of the anti-surge module 10 of said second lightning protection is connected with the signal and communication end of second electric interfaces 12.
The specific embodiment nine: the difference of any one embodiment is in the present embodiment and the specific embodiment five to eight; Present embodiment comprises that also the first active/passive circuit selects module 7, the second active/passive circuit to select module 8 and the automatic isolation module 13 of passive signal short circuit automatically automatically; The said first active/passive circuit selects the first signal and communication end of module 7 to be connected with the secondary signal communication terminal of the anti-surge module 9 of first lightning protection automatically; The said first active/passive circuit selects the secondary signal communication terminal of module 7 to be connected with the first signal and communication end of active front end data transceiver module 5 automatically; The said first active/passive circuit selects the 3rd signal and communication end of module 7 to be connected with the first signal and communication end of the automatic isolation module 13 of passive signal short circuit automatically; The secondary signal communication terminal of the automatic isolation module 13 of said passive signal short circuit selects the 3rd signal and communication end of module 8 to be connected with the second active/passive circuit automatically; The said second active/passive circuit selects the secondary signal communication terminal of module 8 to be connected with the secondary signal communication terminal of active Back end data transceiver module 6 automatically; The said second active/passive circuit selects the first signal and communication end of module 8 to be connected with the secondary signal communication terminal of the anti-surge module 10 of second lightning protection automatically
The first active/passive circuit is selected module 7 automatically; Be used for judging that at first electric interfaces 11 the isolator mode of operation is active or passive during as the isolator input interface; And will send automatic isolation module 13 of passive signal short circuit or active front end data transceiver module 5 to from the data of the anti-surge module 9 of first lightning protection automatically according to judged result; Also be used at first electric interfaces 11 during, will send the anti-surge module 9 of first lightning protection to from the signal of automatic isolation module 13 of passive signal short circuit or active front end data transceiver module 5 as the isolator output interface;
The second active/passive circuit is selected module 8 automatically; Be used for judging that at second electric interfaces 12 the isolator mode of operation is active or passive during as the isolator input interface; And automatically just send automatic isolation module 13 of passive signal short circuit or active Back end data transceiver module 6 to from the data of the anti-surge module 10 of second lightning protection according to judged result; Also be used at second electric interfaces 12 during, will send the anti-surge module 10 of second lightning protection to from the signal of automatic isolation module 13 of passive signal short circuit or active Back end data transceiver module 6 as the isolator output interface;
The automatic isolation module 13 of passive signal short circuit is used in the isolator mode of operation when being passive,
Accomplish the active/passive circuit and select module 8 and active/passive circuit to select the exchanges data of module 9 automatically automatically, also be used for when the RS485 bus short circuit, making the active/passive circuit to select module 8 and active/passive circuit to select 9 isolation of module automatically automatically.
Embodiment ten: this execution mode is further specifying any execution mode in the embodiment five to nine; The described automatic transmitting-receiving control module 4 of this execution mode comprises the first filter unit 4-1, the second filter unit 4-2, front end enables control circuit 4-3 and the rear end enables control circuit 4-4; The signal output part of the first electrical isolation module 1 is connected with the signal input part of the said first filter unit 4-1 and the signal input part of the second filter unit 4-2 simultaneously
The first filter unit 4-1 and the second filter unit 4-2 are respectively applied for the high level burr in the filtering data, and it is stable that data are sent;
Front end enables control circuit 4-3 and the rear end enables control circuit 4-4; Be respectively applied for when the filtered data that receive exist high-low level to change; Control active front end data transceiver module 5 and receive data respectively or send data with active Back end data transceiver module 6, wherein, when active front end data transceiver module 5 dateouts; Front end enables control circuit 4-3 and controls active front end data transceiver module 5 reception data, controls active Back end data transceiver module 6 simultaneously and sends data; When active Back end data transceiver module 6 dateouts, the rear end enables control circuit 4-4 and controls active Back end data transceiver module 6 and receive data, controls active front end data transceiver module 5 simultaneously and sends data.
The isolator of this execution mode can seal in that playing in the RS485 bus extends transmission distance increases the effect of driving force, or plays functions such as signal shorts isolation and relaying between the branch road that seals in the RS485 bus and the bus trunk.
Electric interfaces in this execution mode is the RS485 interface.
In this execution mode, power module of voltage regulation 14 becomes the stable suitable needed voltage of each module work with the power source conversion of outside input, makes isolator can be operated under the active mode;
When isolator is operated in active mode following time; The RS485 signal is from first electric interfaces 11 (RS485 interface) input of isolator of the present invention; And discharge through the surge voltage that exists on the anti-9 pairs of front end input buss of surge module of first lightning protection; And then the device on the protection bus, and can thunder and lightning be discharged the safety of device on the protection front end input bus to the thunderbolt of bus through the anti-surge module of lightning protection;
Isolator of the present invention is after powering on, and the first active/passive circuit selects module 7 to move automatically because of the existence of power supply automatically, first lightning protection is prevented the output of surge module 9 is connected to active front end data transceiver module 5;
After powering on; Active front end data transceiver module 5; Receive to receive and dispatch automatically the control of control module 4, do not have data from electrical isolation module 1 when active front end data transceiver module 5 sends, receive and dispatch automatically control module 4 will make active front end data transceiver module 5 real-time be in accepting state;
Automatically receive and dispatch control module 4, the data direction of monitoring electrical isolation module 1.Under the situation of bus free of data; All be in accepting state through electrical isolation module 2 and the active front end data transceiver module 5 of electrical isolation module 3 controls with active front end data transceiver module 6, real-time monitoring is connected to data on the bus on first electric interfaces 11 (RS485 interface) and second electric interfaces 12 (RS485 interface);
As data from being connected to bus when input of first electric interfaces 11 (RS485 interface); Automatically transmitting-receiving control module 4 will make active front end data transceiver module 5 keep accepting state; Active Back end data transceiver module 6 is in transmit status, will send from the data of active front end data transceiver module 5;
And the second active/passive circuit selects the similar respectively first active/passive circuit of function of module 8 and the anti-surge module 10 of second lightning protection to select the function of module 7 and the anti-surge module 9 of first lightning protection automatically automatically; Promptly the second active/passive circuit selects module 8 to select the circuit of data output automatically, and the device on the anti-10 pairs of Back end data output buss of surge module of second lightning protection is protected.
Isolator of the present invention will be operated under the passive mode under the situation that does not have the power supply input; When RS485 signal during from the input of first electric interfaces 11 (RS485 interface) of isolator of the present invention; To discharge through the surge voltage that exists on the anti-9 pairs of front end input buss of surge module of first lightning protection; And then the device on the protection bus, and can thunder and lightning be discharged the safety of device on the protection front end input bus to the thunderbolt of bus through the anti-surge module 9 of first lightning protection;
The first active/passive circuit selects the module 7 will be because of there not being power supply automatically, and the action that can not switch is connected to the automatic isolation module 13 of passive signal with the output of the anti-surge module 9 of first lightning protection;
Passive signal isolation module 13 will be selected module 8 automatically select the RS485 data-signal of module 7 to send to the second active/passive circuit automatically from the first active/passive circuit;
When the bus branch that is connected to second electric interfaces 12 (RS485 interface) is short-circuited; The automatic isolation module 13 of passive signal short circuit just selects the module 7 and the second active/passive circuit to select the connection between the module 8 to break off automatically in the first active/passive circuit automatically, and the realization short circuit is isolated automatically;
After the branch, short-circuit fault is got rid of, the automatic isolation module 13 of passive signal short circuit will select the module 7 and the second active/passive circuit to select automatically to rebulid connection between the module 8 at the first active/passive circuit automatically.
The industry wiring that the isolator of this execution mode is applied in long distance can solve device being struck by lightning easily very on the RS485 bus, stored charge, electrical potential difference, factor such as surge voltage and the problem destroyed.
Isolator of the present invention can be judged active or passive occasion automatically, fully self adaptation.
Claims (12)
1. RS485 bus short circuit isolator; It is characterized in that: it comprises first electric interfaces (11), the automatic isolation module of passive signal short circuit (13) and second electric interfaces (12); The automatic isolation module of said passive signal short circuit (13) comprises driving trigger element (13-1), switch drive unit (13-2) and RS485 bus switch module (13-3)
First electric interfaces; (11) signal and communication end while and driving trigger element; Signal input part (13-1) and RS485 bus switch module; The first signal and communication end (13-3) connects; Said driving trigger element; Signal output part (13-1) and switch drive unit; Signal input part (13-2) connects; Said switch drive unit; Signal output part (13-2) and RS485 bus switch module; Signal input part (13-3) connects; Said RS485 bus switch module; The secondary signal communication terminal (13-3) and second electric interfaces; (12) signal and communication end connects
Drive trigger element (13-1), be used to switch drive unit (13-2) drive signal is provided;
Switch drive unit (13-2); Be used for when RS485 bus operate as normal, the drive signal that receives being amplified; And then driving RS485 bus switch module (13-3); Make said driving RS485 bus switch module (13-3) conducting, also be used for when the RS485 bus is short-circuited, RS485 bus switch module (13-3) and RS485 bus are broken off;
RS485 bus switch module (13-3) is used under the driving of switch drive unit (13-2), and transmission RS485 bus signals also is used for when the RS485 bus is short-circuited, and under the driving of switch drive unit (13-2), isolates with the RS485 bus.
2. a kind of RS485 bus short circuit isolator according to claim 1 is characterized in that first electric interfaces (11) and second electric interfaces (12) are the RS485 interface.
3. RS485 bus short circuit isolator; It is characterized in that it comprises that first electric interfaces (11), the automatic isolation module of passive signal short circuit (13), second electric interfaces (12), power module of voltage regulation (14) and first lightning protection prevent surge module (9); The automatic isolation module of said passive signal short circuit (13) comprises driving trigger element (13-1), switch drive unit (13-2) and RS485 bus switch module (13-3)
The surge module is prevented in said first lightning protection; (9) the first signal and communication end and first electric interfaces; (11) signal and communication end connects; The surge module is prevented in said first lightning protection; (9) secondary signal communication terminal while and driving trigger element; Signal input part (13-1) and RS485 bus switch module; The first signal and communication end (13-3) connects; Said power module of voltage regulation; (14) the surge module is prevented in the power output end and the first lightning protection lightning protection; (9) power input connects; Said driving trigger element; Signal output part (13-1) and switch drive unit; Signal input part (13-2) connects; Said switch drive unit; Signal output part (13-2) and RS485 bus switch module; Signal input part (13-3) connects; Said RS485 bus switch module; The secondary signal communication terminal (13-3) and second electric interfaces; (12) signal and communication end connects
Drive trigger element (13-1), be used to switch drive unit (13-2) drive signal is provided;
Switch drive unit (13-2); Be used for when RS485 bus operate as normal, the drive signal that receives being amplified; And then driving RS485 bus switch module (13-3); Make said driving RS485 bus switch module (13-3) conducting, also be used for when the RS485 bus is short-circuited, RS485 bus switch module (13-3) and RS485 bus are broken off;
RS485 bus switch module (13-3) is used under the driving of switch drive unit (13-2), and transmission RS485 bus signals also is used for when the RS485 bus is short-circuited, and under the driving of switch drive unit (13-2), isolates with the RS485 bus.
4. a kind of RS485 bus short circuit isolator according to claim 3 is characterized in that first electric interfaces (11) and second electric interfaces (12) are the RS485 interface.
5. RS485 bus short circuit isolator; It is characterized in that it comprises first electric interfaces (11), the automatic isolation module of passive signal short circuit (13), second electric interfaces (12), power module of voltage regulation (14), the anti-surge module (9) of first lightning protection and the anti-surge module (10) of second lightning protection; The automatic isolation module of said passive signal short circuit (13) comprises driving trigger element (13-1), switch drive unit (13-2) and RS485 bus switch module (13-3)
The surge module is prevented in said first lightning protection; (9) the first signal and communication end and first electric interfaces; (11) signal and communication end connects; The surge module is prevented in said first lightning protection; (9) secondary signal communication terminal while and driving trigger element; Signal input part (13-1) and RS485 bus switch module; The first signal and communication end (13-3) connects; Said power module of voltage regulation; (14) the surge module is prevented in the power output end and first lightning protection; (9) power input connects; Said driving trigger element; Signal output part (13-1) and switch drive unit; Signal input part (13-2) connects; Said switch drive unit; Signal output part (13-2) and RS485 bus switch module; Signal input part (13-3) connects; The surge module is prevented in said second lightning protection; (10) first signal and communication end and RS485 bus switch module; Secondary signal communication terminal (13-3) connects; The surge module is prevented in said second lightning protection; (10) the secondary signal communication terminal and second electric interfaces; (12) signal and communication end connects; Power module of voltage regulation; (14) power output end is also prevented the surge module with said second lightning protection; (10) power input connects
Drive trigger element (13-1), be used to switch drive unit (13-2) drive signal is provided;
Switch drive unit (13-2); Be used for when RS485 bus operate as normal, the drive signal that receives being amplified; And then driving RS485 bus switch module (13-3); Make said driving RS485 bus switch module (13-3) conducting, also be used for when the RS485 bus is short-circuited, RS485 bus switch module (13-3) and RS485 bus are broken off;
RS485 bus switch module (13-3) is used under the driving of switch drive unit (13-2), and transmission RS485 bus signals also is used for when the RS485 bus is short-circuited, and under the driving of switch drive unit (13-2), isolates with the RS485 bus.
6. a kind of RS485 bus short circuit isolator according to claim 5 is characterized in that first electric interfaces (11) and second electric interfaces (12) are the RS485 interface.
7. RS485 bus short circuit isolator; It is characterized in that: it comprises first electric interfaces (11), active front end data transceiver module (5), active Back end data transceiver module (6), receives and dispatches control module (4), second electric interfaces (12) and power module of voltage regulation (14) automatically
The signal and communication end of first electric interfaces (11) is connected with the first signal and communication end of active front end data transceiver module (5); The secondary signal communication terminal of said active front end data transceiver module (5) is connected with the signal input part of receiving and dispatching control module (4) automatically with the first signal and communication end of active Back end data transceiver module (6) respectively; The signal input part of said automatic transmitting-receiving control module (4) also is connected with the first signal and communication end of active Back end data transceiver module (6); The controlled end of said active front end data transceiver module (5) is connected with first control end of receiving and dispatching control module (4) automatically; Second control end of said automatic transmitting-receiving control module (4) is connected with the controlled end of active Back end data transceiver module (6); The secondary signal communication terminal of said active Back end data transceiver module (6) is connected with the signal and communication end of second electric interfaces (12); The power input that the power output end of power module of voltage regulation (14) is received and dispatched control module (4) respectively with the power input of the power input of active front end data transceiver module (5), active Back end data transceiver module (6), automatically is connected
Said active front end data transceiver module (5) is used for receiving and dispatching automatically under the control of control module (4), receives or send data;
Said active Back end data transceiver module (6) is used for receiving and dispatching automatically under the control of control module (4), sends or receive data;
Said automatic transmitting-receiving control module (4) is used to control active front end data transceiver module (5) and active Back end data transceiver module (6) and carries out Data Receiving or data transmission.
8. RS485 bus short circuit isolator; It is characterized in that: it comprises first electric interfaces (11), active front end data transceiver module (5), active Back end data transceiver module (6), receives and dispatches control module (4), second electric interfaces (12) and power module of voltage regulation (14), the first electrical isolation module (1), the second electrical isolation module (2) and the 3rd electrical isolation module (3) automatically
The signal and communication end of first electric interfaces (11) is connected with the first signal and communication end of active front end data transceiver module (5); The first signal and communication end of the said first electrical isolation module (1) is connected with the secondary signal communication terminal of active front end data transceiver module (5); The secondary signal communication terminal of the said first electrical isolation module (1) is connected with the first signal and communication end of active Back end data transceiver module (6), and the signal output part of the said first electrical isolation module (1) is connected with the signal input part of receiving and dispatching control module (4) automatically; The signal input part of the said second electrical isolation module (2) is connected with first control end of receiving and dispatching control module (4) automatically, and the signal output part of the said second electrical isolation module (2) is connected with the controlled end of active front end data transceiver module (5); The signal input part of said the 3rd electrical isolation module (3) is connected with second control end of receiving and dispatching control module (4) automatically, and the signal output part of said the 3rd electrical isolation module (3) is connected with the controlled end of active Back end data transceiver module (6); The secondary signal communication terminal of said active Back end data transceiver module (6) is connected with the signal and communication end of second electric interfaces (12); The power input that the power output end of power module of voltage regulation (14) is received and dispatched control module (4) respectively with the power input of the power input of active front end data transceiver module (5), active Back end data transceiver module (6), automatically is connected
Said active front end data transceiver module (5) is used for receiving and dispatching automatically under the control of control module (4), receives or send data;
Said active Back end data transceiver module (6) is used for receiving and dispatching automatically under the control of control module (4), sends or receive data;
Said automatic transmitting-receiving control module (4) is used to control active front end data transceiver module (5) and active Back end data transceiver module (6) and carries out Data Receiving or data transmission;
The said first electrical isolation module (1) is used for the data of exchange from active front end data transceiver module (5) and active Back end data transceiver module (6), and realizes the electrical isolation between said two transceiver modules;
The said second electrical isolation module (2) is used for receiving and dispatching automatically the electrical isolation between control module (4) and active front end data transceiver module (5);
Said the 3rd electrical isolation module (3) is used for receiving and dispatching automatically the electrical isolation between control module (4) and active Back end data transceiver module (6).
9. a kind of RS485 bus short circuit isolator according to claim 8; It is characterized in that: receive and dispatch control module (4) automatically and comprise that first filter unit (4-1), second filter unit (4-2), front end enable control circuit (4-3) and the rear end enables control circuit (4-4); The signal output part of the first electrical isolation module (1) is connected with the signal input part of said first filter unit (4-1) and the signal input part of second filter unit (4-2) simultaneously
First filter unit (4-1) and second filter unit (4-2) are respectively applied for the high level burr in the filtering data, and it is stable that data are sent;
Front end enables control circuit (4-3) and the rear end enables control circuit (4-4); Be respectively applied for when the filtered data that receive exist high-low level to change; Controlling active front end data transceiver module (5) and active Back end data transceiver module (6) receives data respectively or sends data; Wherein, When active front end data transceiver module (5) dateout, front end enables control circuit (4-3) the active front end data transceiver module of control (5) and receives data, controls active Back end data transceiver module (6) simultaneously and sends data; When active Back end data transceiver module (6) dateout, the rear end enables control circuit (4-4) the active Back end data transceiver module of control (6) and receives data, controls active front end data transceiver module (5) simultaneously and sends data.
10. RS485 bus short circuit isolator; It is characterized in that: it comprises first electric interfaces (11), active front end data transceiver module (5), active Back end data transceiver module (6), receives and dispatches the anti-surge module (9) of control module (4), second electric interfaces (12), power module of voltage regulation (14) and first lightning protection automatically
The first signal and communication end of the anti-surge module (9) of said first lightning protection is connected with the signal and communication end of first electric interfaces (11); The secondary signal communication terminal of the anti-surge module (9) of said first lightning protection is connected with the first signal and communication end of active front end data transceiver module (5); The secondary signal communication terminal of said active front end data transceiver module (5) is connected with the signal input part of receiving and dispatching control module (4) automatically with the first signal and communication end of active Back end data transceiver module (6) respectively; The signal input part of said automatic transmitting-receiving control module (4) also is connected with the first signal and communication end of active Back end data transceiver module (6); The controlled end of said active front end data transceiver module (5) is connected with first control end of receiving and dispatching control module (4) automatically; Second control end of said automatic transmitting-receiving control module (4) is connected with the controlled end of active Back end data transceiver module (6); The secondary signal communication terminal of said active Back end data transceiver module (6) is connected with the signal and communication end of second electric interfaces (12); The power input that the power output end of power module of voltage regulation (14) is received and dispatched control module (4) respectively with the power input of the power input of active front end data transceiver module (5), active Back end data transceiver module (6), automatically is connected
Said active front end data transceiver module (5) is used for receiving and dispatching automatically under the control of control module (4), receives or send data;
Said active Back end data transceiver module (6) is used for receiving and dispatching automatically under the control of control module (4), sends or receive data;
Said automatic transmitting-receiving control module (4) is used to control active front end data transceiver module (5) and active Back end data transceiver module (6) and carries out Data Receiving or data transmission.
11. RS485 bus short circuit isolator; It is characterized in that: it comprises first electric interfaces (11), active front end data transceiver module (5), active Back end data transceiver module (6), receive and dispatch control module (4), second electric interfaces (12), power module of voltage regulation (14), the anti-surge module (9) of first lightning protection automatically prevents surge module (10) with second lightning protection
The first signal and communication end of the anti-surge module (9) of said first lightning protection is connected with the signal and communication end of first electric interfaces (11); The secondary signal communication terminal of the anti-surge module (9) of said first lightning protection is connected with the first signal and communication end of active front end data transceiver module (5); The secondary signal communication terminal of said active front end data transceiver module (5) is connected with the signal input part of receiving and dispatching control module (4) automatically with the first signal and communication end of active Back end data transceiver module (6) respectively; The signal input part of said automatic transmitting-receiving control module (4) also is connected with the first signal and communication end of active Back end data transceiver module (6); The controlled end of said active front end data transceiver module (5) is connected with first control end of receiving and dispatching control module (4) automatically; Second control end of said automatic transmitting-receiving control module (4) is connected with the controlled end of active Back end data transceiver module (6); The first signal and communication end of the anti-surge module (10) of said second lightning protection is connected with the secondary signal communication terminal of active Back end data transceiver module (6); The secondary signal communication terminal of the anti-surge module (10) of said second lightning protection is connected with the signal and communication end of second electric interfaces (12); The power input that the power output end of power module of voltage regulation (14) is received and dispatched control module (4) respectively with the power input of the power input of active front end data transceiver module (5), active Back end data transceiver module (6), automatically is connected
Said active front end data transceiver module (5) is used for receiving and dispatching automatically under the control of control module (4), receives or send data;
Said active Back end data transceiver module (6) is used for receiving and dispatching automatically under the control of control module (4), sends or receive data;
Said automatic transmitting-receiving control module (4) is used to control active front end data transceiver module (5) and active Back end data transceiver module (6) and carries out Data Receiving or data transmission.
12. RS485 bus short circuit isolator; It is characterized in that: it comprises first electric interfaces (11); Active front end data transceiver module (5); Active Back end data transceiver module (6); Automatically receive and dispatch control module (4); Second electric interfaces (12); Power module of voltage regulation (14); Surge module (9) is prevented in first lightning protection; Surge module (10) is prevented in second lightning protection; The first active/passive circuit is selected module (7) automatically; The second active/passive circuit is selected module (8) and the automatic isolation module of passive signal short circuit (13) automatically
The first signal and communication end of the anti-surge module (9) of said first lightning protection is connected with the signal and communication end of first electric interfaces (11); The said first active/passive circuit selects the first signal and communication end of module (7) to be connected with the secondary signal communication terminal of the anti-surge module (9) of first lightning protection automatically; The said first active/passive circuit selects the secondary signal communication terminal of module (7) to be connected with the first signal and communication end of active front end data transceiver module (5) automatically; The secondary signal communication terminal of said active front end data transceiver module (5) is connected with the signal input part of receiving and dispatching control module (4) automatically with the first signal and communication end of active Back end data transceiver module (6) respectively; The signal input part of said automatic transmitting-receiving control module (4) also is connected with the first signal and communication end of active Back end data transceiver module (6); The controlled end of said active front end data transceiver module (5) is connected with first control end of receiving and dispatching control module (4) automatically; Second control end of said automatic transmitting-receiving control module (4) is connected with the controlled end of active Back end data transceiver module (6); The said first active/passive circuit selects the 3rd signal and communication end of module (7) to be connected with the first signal and communication end of the automatic isolation module of passive signal short circuit (13) automatically; The secondary signal communication terminal of the automatic isolation module of said passive signal short circuit (13) selects the 3rd signal and communication end of module (8) to be connected with the second active/passive circuit automatically; The said second active/passive circuit selects the secondary signal communication terminal of module (8) to be connected with the secondary signal communication terminal of active Back end data transceiver module (6) automatically; The said second active/passive circuit selects the first signal and communication end of module (8) to be connected with the secondary signal communication terminal of the anti-surge module (10) of second lightning protection automatically; The secondary signal communication terminal of the anti-surge module (10) of said second lightning protection is connected with the signal and communication end of second electric interfaces (12); The power input that the power output end of power module of voltage regulation (14) is received and dispatched control module (4) respectively with the power input of the power input of active front end data transceiver module (5), active Back end data transceiver module (6), automatically is connected
Said active front end data transceiver module (5) is used for receiving and dispatching automatically under the control of control module (4), receives or send data;
Said active Back end data transceiver module (6) is used for receiving and dispatching automatically under the control of control module (4), sends or receive data;
Said automatic transmitting-receiving control module (4) is used to control active front end data transceiver module (5) and active Back end data transceiver module (6) and carries out Data Receiving or data transmission,
The first active/passive circuit is selected module (7) automatically; Be used for judging that at first electric interfaces (11) the isolator mode of operation is active or passive during as the isolator input interface; And will send automatic isolation module of passive signal short circuit (13) or active front end data transceiver module (5) to from the data of the anti-surge module (9) of first lightning protection automatically according to judged result; Also be used at first electric interfaces (11) during, will send the anti-surge module (9) of first lightning protection to from the signal of automatic isolation module of passive signal short circuit (13) or active front end data transceiver module (5) as the isolator output interface;
The second active/passive circuit is selected module (8) automatically; Be used for judging that at second electric interfaces (12) the isolator mode of operation is active or passive during as the isolator input interface; And just send automatic isolation module of passive signal short circuit (13) or active Back end data transceiver module (6) to automatically from the data of the anti-surge module (10) of second lightning protection according to judged result; Also be used at second electric interfaces (12) during, will send the anti-surge module (10) of second lightning protection to from the signal of automatic isolation module of passive signal short circuit (13) or active Back end data transceiver module (6) as the isolator output interface;
The automatic isolation module of passive signal short circuit (13) is used in the isolator mode of operation when being passive,
Accomplish the first active/passive circuit and select the module (7) and the second active/passive circuit to select the exchanges data of module (8) automatically automatically, also be used for when the RS485 bus short circuit, making the first active/passive circuit to select the module (7) and the second active/passive circuit to select automatically to isolate between module (8) automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102186168A CN101883037B (en) | 2010-07-06 | 2010-07-06 | RS485 bus short circuit isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102186168A CN101883037B (en) | 2010-07-06 | 2010-07-06 | RS485 bus short circuit isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101883037A CN101883037A (en) | 2010-11-10 |
| CN101883037B true CN101883037B (en) | 2012-06-13 |
Family
ID=43054934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102186168A Expired - Fee Related CN101883037B (en) | 2010-07-06 | 2010-07-06 | RS485 bus short circuit isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101883037B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545178B (en) * | 2012-03-02 | 2014-10-22 | 哈尔滨理工大学 | RS485 line status monitor and monitoring method |
| CN103973533B (en) * | 2014-05-22 | 2017-06-20 | 哈尔滨理工大学 | The baud rate recognition methods of isolated form RS485/RS422 relaying isolators and method of data flow control |
| CN106341217A (en) * | 2016-08-11 | 2017-01-18 | 长沙格力暖通制冷设备有限公司 | Method for improving stability of air conditioner testing signals and testing device for air conditioner |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201430584Y (en) * | 2009-07-06 | 2010-03-24 | 中国电力科学研究院 | Crash-proof isolating device used for concentration line communication system |
| CN101626231B (en) * | 2009-08-11 | 2011-11-16 | 武汉凡谷电子技术股份有限公司 | AISG tower mounted amplifier RET terminal RS485 circuit |
| CN201479160U (en) * | 2009-09-15 | 2010-05-19 | 王晓庆 | Device for distributing and combining RS485 signals |
| CN201699736U (en) * | 2010-07-06 | 2011-01-05 | 哈尔滨理工大学 | Short circuit isolator for RS485 bus |
-
2010
- 2010-07-06 CN CN2010102186168A patent/CN101883037B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101883037A (en) | 2010-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3691419B1 (en) | Ethernet lighting control system and method, used for stage lamp | |
| CN109391131A (en) | A kind of submodule of MMC valve by-pass switch driving device | |
| CN102269790A (en) | Fault diagnosis circuit for high-voltage relay of power storage battery | |
| CN101883037B (en) | RS485 bus short circuit isolator | |
| CN201699736U (en) | Short circuit isolator for RS485 bus | |
| CN103166313A (en) | Direct current solid state power controller | |
| CN102097926A (en) | Failure protection method for high-order energy gaining power supply | |
| CN103166314A (en) | Direct current solid state power control system | |
| CN203117691U (en) | An intelligent power module and a high-voltage power switch | |
| CN203086246U (en) | CAN bus-based ring main unit control system and power grid monitoring system | |
| CN101207279B (en) | Anti-overstep tripping system | |
| CN102420462A (en) | Process-level smart terminal equipment of smart substation | |
| CN102042435A (en) | Electromagnetic pilot valve driver | |
| CN109318714A (en) | Electric automobile high-voltage distribution system power-on and power-off control method | |
| US9680305B2 (en) | Implementation of fire safety shutdown for solar panels with high reliability | |
| CN101169899A (en) | Signal distributor with electric surge protection | |
| CN105490249A (en) | Linkage protection device for transformer neutral point DC blocking equipment and method thereof | |
| CN202795352U (en) | Wiring method for recommend standard (RS) 232 interface and RS 485 interface | |
| CN102420595A (en) | Pulse width modulation coding device | |
| CN101895098B (en) | Protecting-two-of-three redundancy monitoring circuit | |
| CN201118194Y (en) | Energy supply protector | |
| CN104071166B (en) | 2 get 2 cab signal security of system interface subrack and container structures thereof | |
| CN102622898A (en) | Unique yellow-flash controller of signaler and signaler with same | |
| CN104037935B (en) | A kind of Double Power Switch Controller of band short circuit tripping protection | |
| CN102437549A (en) | Two-bus short-circuit protective isolation device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120613 Termination date: 20130706 |