CN205593583U

CN205593583U - RS485 communication module for electromagnetic water meter

Info

Publication number: CN205593583U
Application number: CN201620191486.6U
Authority: CN
Inventors: 张赣
Original assignee: Nanjing Huiran Measurement And Control Technology Co Ltd
Current assignee: Nanjing Huiran Measurement And Control Technology Co Ltd
Priority date: 2016-03-11
Filing date: 2016-03-11
Publication date: 2016-09-21
Anticipated expiration: 2026-03-11

Abstract

The utility model relates to a RS485 communication module for electromagnetic water meter, including socket, 3 group communication submodule pieces, three group communication submodule pieces be connected with 2 feet, 3 feet, 6 feet of socket respectively, sub - communication module include a schmidt trigger, the 2nd schmidt trigger, the 3rd schmidt trigger, fourth schmidt trigger, the 5th schmidt trigger, the 6th schmidt trigger, first electric capacity, second electric capacity, first resistance, second resistance, third resistance, transformer, 3 group communication submodule pieces in to connect the circuit orientation of the communication submodule piece of 3 feet two sets of opposite with other. Through the 3rd resistor parallel with positive supply between the socket of the communication submodule piece that two sets of circuit orientations are the same and a schmidt trigger's input. Compared with the prior art, the utility model, it goes down except some redundant circuit in the unchangeable prerequisite of the original function of realization, makes circuit structure more retrench, energy consumption greatly reduced.

Description

Electromagnetism water meter RS485 communication module

Technical field

This utility model relates to a kind of communication module, specifically, is the RS485 communication module of a kind of electromagnetism water meter use.

Background technology

In order to electromagnetism water meter can communicate with the external world, typically external RS485 communication module on water meter, traditional is logical Letter Module Price is expensive, and electronic circuit is complicated, so its power consumption is the biggest.But the subject boards of electromagnetism water meter is low-power consumption Design, it uses lithium battery work, tradition RS485 communication module to need electromagnetism water meter to have under civil power module just can to grow Time was run the length of service of so electromagnetism water meter built-in lithium battery and is substantially reduced, and was reduced to half from original 5～6 years Within Nian.

Summary of the invention

Goal of the invention: the purpose of this utility model is to provide a kind of communication only needing lithium battery power supply just can normally work Module.

Technical scheme: this utility model adopts the following technical scheme that realization: a kind of electromagnetism water meter RS485 communication module, Including socket, 3 groups of communicator modules, three groups of described communicator modules are connected with 2 feet of socket, 3 feet, 6 feet respectively, Described sub-communication module include the first Schmidt trigger, the second Schmidt trigger, the 3rd Schmidt trigger, Four Schmidt triggers, the 5th Schmidt trigger, the 6th Schmidt trigger, the first electric capacity, the second electric capacity, first Resistance, the second resistance, the 3rd resistance, transformator, the input of the first described Schmidt trigger connects socket, the The outfan of one Schmidt trigger connects the input of the second Schmidt trigger, the outfan of the second Schmidt trigger One end of connection transformer primary coil, the other end of primary coil is sequentially connected with the outfan of the 4th Schmidt trigger, The input of the 4th Schmidt trigger connects the outfan of the 3rd Schmidt trigger, the input of the 3rd Schmidt trigger End is parallel between the first Schmidt trigger and the second Schmidt trigger, and the two ends of transformer secondary coil connect respectively The outfan of the 5th Schmidt trigger and the input of the 6th Schmidt trigger, the input of the 5th Schmidt trigger It is connected with the outfan of the 6th Schmitt trigger, connects between the first Schmidt trigger and the second Schmidt trigger First electric capacity, the second electric capacity of connecting between the first Schmidt trigger and the 3rd Schmidt trigger, the first electric capacity with Between second Schmidt trigger, positive supply in parallel, the first resistance that described positive supply is connected, execute at the second electric capacity and the 3rd Ground connection after second resistance in parallel between schmitt trigger, connects at transformer secondary coil and the 6th Schmidt trigger junction 3rd resistance.

The circuit direction of the communicator module connecting 3 feet in 3 groups of described communicator modules is contrary with other two groups.

Pass through between socket and the input of the first Schmidt trigger of the identical communicator module in two groups of circuit directions 3rd resistor coupled in parallel positive supply.

Beneficial effect: this utility model compared with prior art, its realize original function constant on the premise of eliminate one The circuit of a little redundancies, makes circuit structure more simplify, and energy consumption is substantially reduced.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Detailed description of the invention

Below in conjunction with Figure of description, this utility model is described in further detail:

This utility model relates to the communication module of a kind of electromagnetism water meter, specifically, is a kind of RS485 communication module, It is formed by the communicator wired in parallel that 3 circuit structures are identical, and the circuit direction wherein having a group is contrary with other two groups. Described communicator module include the first Schmidt trigger, the second Schmidt trigger, the 3rd Schmidt trigger, Four Schmidt triggers, the 5th Schmidt trigger, the 6th Schmidt trigger, the first electric capacity, the second electric capacity, first Resistance, the second resistance, the 3rd resistance, transformator, the input of the first described Schmidt trigger connects socket, the The outfan of one Schmidt trigger connects the input of the second Schmidt trigger, the outfan of the second Schmidt trigger One end of connection transformer primary coil, the other end of primary coil is sequentially connected with the outfan of the 4th Schmidt trigger, The input of the 4th Schmidt trigger connects the outfan of the 3rd Schmidt trigger, the input of the 3rd Schmidt trigger End is parallel between the first Schmidt trigger and the second Schmidt trigger, and the two ends of transformer secondary coil connect respectively The outfan of the 5th Schmidt trigger and the input of the 6th Schmidt trigger, the input of the 5th Schmidt trigger It is connected with the outfan of the 6th Schmitt trigger, connects between the first Schmidt trigger and the second Schmidt trigger First electric capacity, the second electric capacity of connecting between the first Schmidt trigger and the 3rd Schmidt trigger, the first electric capacity with Between second Schmidt trigger, positive supply in parallel, the first resistance that described positive supply is connected, execute at the second electric capacity and the 3rd Ground connection after second resistance in parallel between schmitt trigger, connects at transformer secondary coil and the 6th Schmidt trigger junction 3rd resistance.

This utility model also includes a socket, and 1 foot of described socket connects positive supply, and 2,3,6 feet connect logical respectively Letter submodule, 4 foot ground connection, 5 feet connect data terminal.Specifically, the communicator module that 3 described feet connect Circuit direction is in opposite direction be connected with on 2,6 feet.

In this utility model, the socket of communicator module that described 2,6 feet connect and the first Schmidt trigger defeated Enter between end by the 3rd resistor coupled in parallel positive supply.

Claims

null1. an electromagnetism water meter RS485 communication module，It is characterized in that: include socket、3 groups of communicator modules，3 groups of described communicator modules respectively with 2 feet of socket、3 feet、6 feet connect，Described communicator module includes the first Schmidt trigger、Second Schmidt trigger、3rd Schmidt trigger、4th Schmidt trigger、5th Schmidt trigger、6th Schmidt trigger、First electric capacity、Second electric capacity、First resistance、Second resistance、3rd resistance、Transformator，The input of the first described Schmidt trigger connects socket，The outfan of the first Schmidt trigger connects the input of the second Schmidt trigger，One end of the outfan connection transformer primary coil of the second Schmidt trigger，The other end of primary coil is sequentially connected with the outfan of the 4th Schmidt trigger，The input of the 4th Schmidt trigger connects the outfan of the 3rd Schmidt trigger，The input of the 3rd Schmidt trigger is parallel between the first Schmidt trigger and the second Schmidt trigger，The two ends of transformer secondary coil connect outfan and the input of the 6th Schmidt trigger of the 5th Schmidt trigger respectively，The input of the 5th Schmidt trigger and the outfan of the 6th Schmitt trigger connect，Connect between the first Schmidt trigger and the second Schmidt trigger the first electric capacity，Connect between the first Schmidt trigger and the 3rd Schmidt trigger the second electric capacity，Positive supply in parallel between the first electric capacity and the second Schmidt trigger，Connect on described positive supply the first resistance，Ground connection after the second resistance in parallel between the second electric capacity and the 3rd Schmidt trigger，At transformer secondary coil and the 6th Schmidt trigger junction series connection the 3rd resistance.
Electromagnetism water meter RS485 communication module the most according to claim 1, it is characterised in that: the circuit direction of the communicator module connecting 3 feet in 3 groups of described communicator modules is contrary with other two groups.
Electromagnetism water meter RS485 communication module the most according to claim 1, it is characterised in that: by the 3rd resistor coupled in parallel positive supply between socket and the input of the first Schmidt trigger of the identical communicator module in two groups of circuit directions.