CN208969658U - Bus conversion device - Google Patents
Bus conversion device Download PDFInfo
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- CN208969658U CN208969658U CN201822218720.1U CN201822218720U CN208969658U CN 208969658 U CN208969658 U CN 208969658U CN 201822218720 U CN201822218720 U CN 201822218720U CN 208969658 U CN208969658 U CN 208969658U
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- bus
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Abstract
The utility model provides one kind and applies the bus conversion device in fire resistant doorsets monitoring system at this stage, including main control MCU, the indicator light connecting with the main control MCU；It further include the signal input circuit being connect with the main control MCU, the signal output apparatus being connect with the main control MCU, the CAN communication transmission circuit being connect with the main control MCU, the two line communication transmission circuit being connect with the main control MCU, RS485 communications transceiver circuit.
Description
Technical field
The utility model relates to a kind of universal bus conversion devices, more particularly to one kind is applied at this stage in fire prevention gatekeeper
Bus conversion device in control system.
Background technique
With the continuous development of fire fighting monitoring equipment development technology, fire resistant doorsets monitoring system is on the basis of existing system
Mitigation system centre communication pressure, improves the system speed of response, raising system can totally accommodate two lines bus module number, in
Bus conversion device is added between the heart and module.
The bus conversion device completes detection and the aggregation of data of two lines bus module, and center only needs within the most of the time
Communication is carried out with bus conversion device can complete the collecting function of module data, pass through general line system under rare occasion
Device completion is operated between module.
Currently, fire resistant doorsets monitoring detector module in the market is not filled using general line system generally with host end communication
It sets, but host passes through CAN bus and module Direct Communication.The framework is that the fire resistant doorsets monitoring system of mainstream currently on the market is logical
Framework is interrogated, there are some drawbacks for this framework, and there are many communication packet such as host and module Direct Communication, between the two dealing, if
Field module quantity is larger, and the pressure of host is just very big at this time, influences global communication efficiency；Live fire resistant doorsets mould for another example
The quantity of block is very big, but existing system is limited using the module number of CAN bus carrying, generally less than 110 points, Wu Fashi
Now big quantity module bearing capacity；And 2 power supply lines are needed in wiring process, and 2 data lines, totally 4 lines.Two lines bus power supply
It is public with communication line, it is only necessary to 2 lines, and system bearing ability is greater than CAN bus, has evaded CAN bus using two lines bus and has existed
The requirement for using and being routed.
Summary of the invention
The purpose of the utility model is to overcome the deficiencies in the prior art, adapt to reality and need, and provide one kind and answer at this stage
The bus conversion device in fire resistant doorsets monitoring system.
In order to realize the purpose of this utility model, the technology employed by the present utility model is
A kind of bus conversion device is designed, including main control MCU, the indicator light connecting with the main control MCU；Further include with it is described
The signal input circuit of main control MCU connection, is connect with the main control MCU signal output apparatus connecting with the main control MCU
CAN communication transmission circuit, the two line communication transmission circuit being connect with the main control MCU, RS485 communications transceiver circuit；
The signal input circuit includes a bus transceiver；
The signal output apparatus includes an interface P2；
The CAN communication transmission circuit includes CAN transceiver module, the common mode choke connecting with main control MCU, common mode chokes
Port 3, the port 4 of circle are connect with the port CANL, the port CANH on CAN transceiver module respectively, and common mode choke port 1 is successively
It is connect by the resistance R30 of series connection, resistance R31 with the interface 1 of interface J3, common mode choke port 2 passes sequentially through series connection
Resistance R25, the resistance R26 of connection are connect with the interface 2 of interface J3, further include Transient Suppression Diode D4, and transient state inhibits two poles
Wherein one end of pipe D4 is connected between resistance R25, resistance R26, the other end of Transient Suppression Diode D4 is connected to resistance R30
Further include Transient Suppression Diode Q1 between resistance R31, wherein one end of Transient Suppression Diode Q1 be connected to resistance R25,
Between resistance R26, the other end of Transient Suppression Diode Q1 be connected between resistance R30 and resistance R31, Transient Suppression Diode
D4 is connected in parallel with Transient Suppression Diode Q1；It further include resistance R28, wherein one end of the resistance R28 is connected to resistance R26
Between interface J3, the other end of resistance R28 is connected between resistance R31 and interface J3.
Two line communication transmission circuit in the design includes that the first bus communication transmission circuit and the second bus communication are received
The structure of Power Generation Road, the first bus communication transmission circuit and the second bus communication transmission circuit is identical, can adopt in specific implementation
With the first bus communication transmission circuit and the second bus communication transmission circuit structure of structure as shown in Figure 2
Two RS485 communications transceiver circuits include RS485 transceiver communication chip.
The indicator light mostly dry sub-circuit, the sub-circuit includes light emitting diode D, and the anode of light emitting diode D is logical
It crosses resistance R1 to connect with main control MCU, the minus earth of light emitting diode D.
The utility model has the beneficial effects that:
The use of the design can be achieved existing CAN bus agreement, newly-increased two lines bus protocol data being converted to RS485 data
It is communicated with center, it is just right to solve for mitigating central host pressure communication, and big in the case where more than field module
The module connection of quantity is online, greatly improves on-site supervision ability！
Detailed description of the invention
Fig. 1 is the functional block diagram of this circuit；
Fig. 2 is the main control MCU schematic diagram in this circuit；
Fig. 3 is the two line communication transmission circuit circuit theory schematic diagram in this circuit；
Fig. 4 is the power circuit principle schematic diagram in this circuit；
Fig. 5 is the signal input circuit schematic illustration in this circuit；
Fig. 6 is the signal output apparatus schematic illustration in this circuit；
Fig. 7 is the indicator light circuit schematic illustration in this circuit；
Fig. 8 is the RS485 transceiver communication chip schematic diagram in this circuit；
Fig. 9 is the CAN communication transmission circuit schematic diagram in this circuit.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples:
Embodiment 1: a kind of bus conversion device, referring to Fig. 1 to Fig. 9.
It is converted to including being responsible for receiving by the detector module data that CAN bus agreement, two lines bus agreement send over
RS485 agreement simultaneously carries out the main control MCU of data communication, the indicator light connecting with the main control MCU, power supply between central host
Circuit；Further include the signal input circuit being connect with the main control MCU, the signal output apparatus being connect with the main control MCU, with
The CAN communication transmission circuit of the main control MCU connection, two line communication transmission circuit, the RS485 being connect with the main control MCU
Communications transceiver circuit.
In this circuit, above-mentioned indicator light, power circuit, signal input circuit, signal output apparatus, CAN communication transmitting-receiving
Existing circuit structure in the prior art can be used in circuit, two line communication transmission circuit, RS485 communications transceiver circuit, also may be used
Using the attached drawing structure gone out given in this specification attached drawing.
Specifically, in this circuit, the signal input circuit includes a bus transceiver, the signal output
Circuit includes an interface P2.
The CAN communication transmission circuit includes CAN transceiver module U7, the common mode choke T7 connecting with main control MCU, altogether
Port 3, the port 4 of mould choke coil T7 is connect with the port CANL, the port CANH on CAN transceiver module U7 respectively, common mode chokes
The circle port T7 1 passes sequentially through the resistance R30 of series connection, resistance R31 and connect with the interface 1 of interface J3, the end common mode choke T7
Mouth 2 passes sequentially through the resistance R25 of series connection, resistance R26 and connect with the interface 2 of interface J3, further includes Transient Suppression Diode
Wherein one end of D4, Transient Suppression Diode D4 is connected between resistance R25, resistance R26, Transient Suppression Diode D4 it is another
End is connected between resistance R30 and resistance R31, further includes Transient Suppression Diode Q1, and wherein the one of Transient Suppression Diode Q1
End be connected between resistance R25, resistance R26, the other end of Transient Suppression Diode Q1 is connected to resistance R30 and resistance R31 it
Between, Transient Suppression Diode D4 is connected in parallel with Transient Suppression Diode Q1；It further include resistance R28, the resistance R28 is wherein
One end is connected between resistance R26 and interface J3, the other end of resistance R28 is connected between resistance R31 and interface J3；
Two line communication transmission circuit include the first bus communication transmission circuit and the second bus communication transmission circuit, first
The structure of bus communication transmission circuit and the second bus communication transmission circuit is identical；
RS485 communications transceiver circuit includes RS485 transceiver communication chip.
The indicator light mostly dry sub-circuit, the sub-circuit includes light emitting diode D, and the anode of light emitting diode D is logical
It crosses resistance R1 to connect with main control MCU, the minus earth of light emitting diode D.
Significance of this circuit in specifically used, which is to realize, can access more multi-detector node, and realize with
Compatible two lines bus is communicated with detector module on the basis of toward CAN bus communication modes.
What the embodiments of the present invention were announced is preferred embodiment, and however, it is not limited to this, the common skill of this field
Art personnel understand the spirit of the utility model easily according to above-described embodiment, and make different amplification and variation, but as long as
The spirit of the utility model is not departed from, it is all within the protection scope of the present utility model.
Claims (2)
1. a kind of bus conversion device, including main control MCU, the indicator light being connect with the main control MCU；It is characterized by also including
The signal input circuit that is connect with the main control MCU, the signal output apparatus being connect with the main control MCU, with the main control MCU
The CAN communication transmission circuit of connection, the two line communication transmission circuit being connect with the main control MCU, RS485 transceiver communication electricity
Road；
The signal input circuit includes a bus transceiver；
The signal output apparatus includes an interface P2；
The CAN communication transmission circuit includes CAN transceiver module, the common mode choke connecting with main control MCU, common mode choke
Port 3, port 4 are connect with the port CANL, the port CANH on CAN transceiver module respectively, and common mode choke port 1 passes sequentially through
Resistance R30, the resistance R31 of series connection are connect with the interface 1 of interface J3, and common mode choke port 2 passes sequentially through series connection
Resistance R25, resistance R26 connect with the interface 2 of interface J3, further include Transient Suppression Diode D4, Transient Suppression Diode D4
Wherein one end be connected between resistance R25, resistance R26, the other end of Transient Suppression Diode D4 be connected to resistance R30 and electricity
It hinders between R31, further includes Transient Suppression Diode Q1, wherein one end of Transient Suppression Diode Q1 is connected to resistance R25, resistance
Between R26, the other end of Transient Suppression Diode Q1 be connected between resistance R30 and resistance R31, Transient Suppression Diode D4 with
Transient Suppression Diode Q1 is connected in parallel；It further include resistance R28, wherein one end of the resistance R28 is connected to resistance R26 and connects
Between mouthful J3, the other end of resistance R28 is connected between resistance R31 and interface J3；
Bus communication transmission circuit includes the first bus communication transmission circuit and the second bus communication transmission circuit, and the first bus is logical
Believe that the structure of transmission circuit and the second bus communication transmission circuit is identical；
RS485 communications transceiver circuit includes RS485 transceiver communication chip.
2. bus conversion device as described in claim 1, it is characterised in that: the indicator light mostly dry sub-circuit, the son
Circuit includes light emitting diode D, and the anode of light emitting diode D is connect by resistance R1 with main control MCU, the yin of light emitting diode D
Pole ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822218720.1U CN208969658U (en) | 2018-12-27 | 2018-12-27 | Bus conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822218720.1U CN208969658U (en) | 2018-12-27 | 2018-12-27 | Bus conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208969658U true CN208969658U (en) | 2019-06-11 |
Family
ID=66766580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822218720.1U Active CN208969658U (en) | 2018-12-27 | 2018-12-27 | Bus conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208969658U (en) |
-
2018
- 2018-12-27 CN CN201822218720.1U patent/CN208969658U/en active Active
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