CN209710111U - A kind of eight in and eight out Modbus module - Google Patents
A kind of eight in and eight out Modbus module Download PDFInfo
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- CN209710111U CN209710111U CN201822124375.5U CN201822124375U CN209710111U CN 209710111 U CN209710111 U CN 209710111U CN 201822124375 U CN201822124375 U CN 201822124375U CN 209710111 U CN209710111 U CN 209710111U
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Abstract
The utility model relates to a kind of eight in and eight out Modbus modules, including main control chip, voltage comparator, photoelectrical coupler, relay, communication module and power module, wherein, voltage comparator, relay, communication module and power module are electrically connected with main control chip, photoelectrical coupler is electrically connected with voltage comparator, is used for electric signal isolation when On-off signal.This module is communicated by RS485 or RS232 transceiver and computer or PC, the signal of acquisition is transmitted to the main control chip processing of MEGA16, by voltage comparator and photoelectrical coupler filter interference signal and and electric signal isolation, keep the signal for being transmitted to main control chip completely noiseless, guarantees the safety of module.
Description
Technical field
The utility model relates to communication transmission technology field more particularly to a kind of eight in and eight out Modbus modules.
Background technique
Currently, existing the same or similar product is mainly small PLC series and On-off signal output module, it is small-sized
The product price of PLC series is high, and related technical personnel is needed to program, and technical requirements are high；The type of On-off signal output module
It is relatively simple, the selection of NPN or PNP can not be carried out.
Utility model content
The purpose of this utility model is to provide a kind of eight in and eight out Modbus module, npn or pnp can be used arbitrarily in user
On-off signal, it is convenient and practical.
To achieve the above object, the technical solution of the utility model is as follows:
A kind of eight in and eight out Modbus module, including main control chip, voltage comparator, photoelectrical coupler, relay, communication
Module, power module, the voltage comparator, relay, communication module and power module are electrically connected with main control chip, described
Photoelectrical coupler is electrically connected with voltage comparator, is used for electric signal isolation when On-off signal.
In above scheme, the voltage comparator is four tunnel differential voltage comparators, model LM339；The photoelectricity coupling
Clutch is four-way transistor output photoelectric coupler, model PS2801-4.
In above scheme, the communication module includes RS485 transceiver and RS232 transceiver, the RS485 transceiver and
RS232 transceiver is electrically connected with main control chip, is used for external communication.
In above scheme, the relay is several, is used for controlling terminal equipment, model HF49HD.
In above scheme, the model MEGA16 of the main control chip.
Compared with prior art, the eight in and eight out Modbus module of the utility model has the beneficial effect that
On-off signal power supply and power supply are isolated, and are easy the equipment that do not power with other and carry out signal docking；
On-off signal part uses optical isolation signalling technique, and external electric signal enters the number of module by optical isolation
According to processing part, to this module more secure and reliable；
Using voltage comparator to input signal processing, when signal is transferred to main control chip, signal is completely noiseless；
It is programmed using common main control chip MEGA16, it is simple to operation, extraneous communication, skill are carried out using ModBus
Art personnel are easily mastered.
Detailed description of the invention
Fig. 1 is the functional block diagram of eight in and eight out Modbus module in an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.
As shown in Figure 1, a kind of eight in and eight out Modbus module of the utility model, including main control chip, voltage comparator,
Photoelectrical coupler, relay, communication module and power module.Wherein, voltage comparator, relay, communication module and power supply mould
Block is electrically connected with main control chip, and photoelectrical coupler is electrically connected with voltage comparator, is used for electric signal isolation when On-off signal.
Wherein, voltage comparator is four tunnel differential voltage comparators, and model LM339 filters signal when inputting
Wave eliminates interference signal；Photoelectrical coupler is four-way transistor output photoelectric coupler, model PS2801-4, using light
Coupling isolation signals technology more pacifies this module when external electric signal is handled by entering main control chip after optical isolation
It is complete reliable.
Communication module includes RS485 transceiver and RS232 transceiver, RS485 transceiver and RS232 transceiver and master control core
Piece electrical connection, is used for external communication.RS485 transceiver uses MAX487 chip, and RS232 transceiver uses MAX232 chip, leads to
Communication interface is communicated using RS232 or RS485, is suitble to Industry Control overwhelming majority bus protocol.
This module uses eight relays, and model HF49HD is used for controlling terminal equipment, such as motor.
The model MEGA16 of main control chip, communication and this module-internal bus for other equipment and this module it
Between communication, MEGA16 is 8 CMOS microcontrollers of low-power consumption of the AVR risc architecture based on enhancing, and AVR kernel has rich
Rich instruction set and 32 general purpose working registers, all registers all directly patrol unit (ALU) with calculation and are connected, so that one
Item instruction can access two independent registers simultaneously within a clock cycle, this structure substantially increases code efficiency,
And there is the data throughput that 10 times are up to than common CISC microcontroller.User can be used arbitrarily npn's or pnp
On-off signal, user switch On-off signal mode by the different location that jumper cap is inserted into.
This module is communicated by RS485 or RS232 transceiver and computer or PC, and the signal of acquisition is transmitted to MEGA16
Main control chip processing, by voltage comparator and photoelectrical coupler filter interference signal and and electric signal isolation, make to be transmitted to
The signal of main control chip is completely noiseless, guarantees the safety of module.
Above embodiments are only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, be made any change, each falls within this reality on the basis of technical solutions
With in novel protected range.
Claims (5)
1. a kind of eight in and eight out Modbus module, it is characterised in that: including main control chip, voltage comparator, photoelectrical coupler, after
Electric appliance, communication module, power module, the voltage comparator, relay, communication module and power module are electric with main control chip
Connection, the photoelectrical coupler are electrically connected with voltage comparator, are used for electric signal isolation when On-off signal.
2. eight in and eight out Modbus module according to claim 1, it is characterised in that: the voltage comparator is that four tunnels are poor
Dynamic voltage comparator, model LM339；The photoelectrical coupler is four-way transistor output photoelectric coupler, model
PS2801-4。
3. eight in and eight out Modbus module according to claim 1, it is characterised in that: the communication module includes RS485
Transceiver and RS232 transceiver, the RS485 transceiver and RS232 transceiver are electrically connected with main control chip, for external logical
News.
4. eight in and eight out Modbus module according to claim 1, it is characterised in that: the relay is several, is used
In controlling terminal equipment, model HF49HD.
5. eight in and eight out Modbus module according to claim 1, it is characterised in that: the model of the main control chip
MEGA16。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124375.5U CN209710111U (en) | 2018-12-18 | 2018-12-18 | A kind of eight in and eight out Modbus module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124375.5U CN209710111U (en) | 2018-12-18 | 2018-12-18 | A kind of eight in and eight out Modbus module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209710111U true CN209710111U (en) | 2019-11-29 |
Family
ID=68638029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822124375.5U Active CN209710111U (en) | 2018-12-18 | 2018-12-18 | A kind of eight in and eight out Modbus module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209710111U (en) |
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2018
- 2018-12-18 CN CN201822124375.5U patent/CN209710111U/en active Active
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