4-20mA MA to 485 Current Analog AI Input Signal Acquisition Module MODBUS RTU | Обустройство дома

4-20mA MA to 485 Current Analog AI Input Signal Acquisition Module MODBUS RTU | Обустройство дома

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This product supportsPLC、MCGS、KingviewSecondary development under！

aboutPhotoelectric isolation485Description of communication

In most applications，485Communication without photoelectric isolation is not too big a problem，howeverAt the industrial site，In particular, the acquisition of high-precision analog quantity(electric current、Voltage)In the case of，From485The interference on the communication line will have a great impact on the working power supply of the main board，It will lead to large jump of collected data，In order to meet the requirements of working stability and communication stability in industrial field，This module adopts high speed optocoupler and isolationDCDCPower module，Yes485Photoelectric isolation of communication lines，Thorough*The bottom is settled485Interference of communication line on main board power supply，The communication interface of some modules on the market is not photoelectric isolation，If the data you collect with this product is not stable，Please consider whether it is because the communication interface is not photoelectric isolation！

Wiring instructions

24V   ---   Main board working power supply positive，DC24V

GND ---   Main board working power ground

Ix      ---   4~20mAInput current source channel0(relativeGND)

A        ---   Photoelectric isolation485signalA

B        ---   Photoelectric isolation485signalB

VSS    ---   Photoelectric isolation485Ground wire

Parameter introduction

Here's how it worksMODBUS RTUCommunication protocol and related contents

Our shopExemption*Fee provisionThe upper computer management software is as follows（No source code is provided）：

 The communication protocol of this product is described below

 Communication rate：9600,8,N,1

 data format：hexadecimal

For the convenience of secondary development，Buyers must be familiar with the aboveCommunication Association

Discussion，The serial port developed by the shopkeeper is largeDivision software，It can be very square

Manual sending of convenienceData and module communication，If you need

The software，Free gift！

Users can also use other familiar serial assistant software for testing，But it was sent

MODBUSThe instruction package must be connected after it2ByteMODBUS CRC，This software provides

countMODBUS CRCFunction of，The screenshot is as follows：

The test data of this product are as follows：

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