Free Shipping 1pc Analog to RS485 Module input 4 20mA\0 5V\0 10V To output 485 modbus module 10 bit AD

Free Shipping 1pc Analog to RS485 Module input 4 20mA\0 5V\0 10V To output 485 modbus module 10 bit AD
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Oписание продукта

modname=ckeditor
 

Chapter 1 product introduction

A.Summary

MB4RTD 4roadHigh precision of platinum resistanceThe acquisition module, the platinum resistance (PT100/PT1000 @385 double excitation current respectively 500uA/250uA) signal; excitation source for double platinum resistance, programmable excitation current source, acquisition speed and precision is higher and faster; analog signal data acquisition, by isolating the RS485 interface output; module using Modbus-RTU communication, can be adapted to PLC, DCS and configuration software.

Signal acquisition, CPU and power input, RS485 communication, electrical signals are isolated from each other, effectively suppressing all kinds of mode and common mode interference, ensuring the accuracy of data, and ensuring the reliable operation of modules.

Two.Characteristic

1.The standard Modbus-RTU protocol is used.

2.The input signal type of the channel can be set according to your own requirements.

3.High precision signal acquisition: high precision 24 bit AD and dual excitation matched programmable current source.

4.Security: signal acquisition, signal output, power supply, RS485 communication electrical signals are isolated from each other.

5.Communication protection: RS485 communication signal output interface adopts overvoltage over current double protection.

6.The type of input signal and the format of communication can be set by software.

7.Power polarity protection.

Three.Technical indicators

project

parameter

AI

Signal input

1Input channel: 4 channel isolation analog acquisition

2Input signal type: platinum resistance (PT100/PT1000) can customize each channel input

3Sampling rate: 4 channels are collected for each 200mS (5 acquisition points per second per second)

4Resolution: 24 bit AD collection

5.Acquisition circuit and CPU isolation voltage protection: 1500V

DIAnd DO

1.4Road trunk contact optocoupler isolating public land input

2.4Circuit collector open circuit optocoupler isolating common ground output

RS485

Communication output

1Communication protocol: MODBUS-RTU

2Interface type: isolation RS485 communication, output interface with overvoltage over current double protection

3Baud rate: 1200BPS, 2400bps, 4800bps, 9600bps, 19200bps

38400bps57600bps, 115200bps.

4Check bit: no check, parity check, odd check

5Setup mode: module address, baud rate, check bit can be set up by software

6.Communication circuit and CPU isolation voltage protection: 1500V

Module size

A.Individual module size: 104mm*72mm*26mm

B.With terminal and guide box size: 124mm*72mm*45mm

Installation method

Standard DIN guide rail installation (35mm guideway or high and low guide rail)

work environment

Temperature: -10 ~ +55 C humidity: 35~85% (non condensation)

Working power supply

1Power supply voltage: 10V~30V wide range power supply, polarity protection with power supply

2Power consumption: less than 3W

Four.measurement accuracy

Input type

measuring range

Display resolution

accuracy

rtd

PT100(-200 - 850 C)

0.1C

0.05%

PT1000(-200 - 850 C)

0.1C

0.05%

Five.Product appearance

Six.Module indicator light and switch function description

1.POW/SET;Module working status indication

A.Green light: module work in running state. B. red light: module configuration parameters have been written, need to re power.

2.TXD/RXD:Communication status indication

A.Green light flashes: the communication receives the data B. red light: the module is sending data

C.The green light is always bright: the communication RS485 line connected to DATA+ and DATA- is back or connection has broken line

3.Right reset switch of module

A.When the communication parameters (module address, baud rate, parity bit) do not know or communication parameter misspecification, and can not establish contact module communication, the solution is to reset the communication parameters; we use the clip to hold the reset switch is not open, 5 seconds after the [POW/SET] module of the red indicator lights, release the reset switch, the communication the parameters have been reset, as long as the power supply module after the restart time, the communication parameters of the module has been reset.

B.Post reset communication parameters: Address: 1, baud rate: 9600bps, check bit: No.

Seven.Typical application wiring diagram

Eight.Terminal definition

terminal

Name

Explain

 

terminal

Name

Explain

1

DI0

Switch input 0

26

NC

empty

2

AIGND

Switch input 1

25

C3

Platinum resistance input 3

3

IN1+

Switch input 2

24

AI3-

The 3 negative end of the analog input channel

4

IN2+

Switch input 3

23

AI3+

Analog input channel 3 positive end

5

DCOM

Open the public end

22

C2

Platinum resistance input 2

6

DO0

Switch output 0

21

AI2-

The 2 negative end of the analog input channel

7

DO1

Switch output 1

20

AI2+

Analog input channel 2 positive end

8

DO2

Switch output 2

19

C1

Platinum resistance input 1

9

DO3

Switch output 3

18

AI1-

The 1 negative end of the analog input channel

10

DATA+

RS485 ACommunication +

17

AI1+

Analog input channel 1 positive end

11

DATA-

RS485 BCommunication -

 

16

C0

Platinum resistance input 0

12

+Vs

Power input +

 

15

AI0-

The 0 negative end of the analog input channel

13

GND

Power input -

 

14

AI0+

Analog input channel 0 positive end

Nine.Schematic block diagram

The second chapterModbusRegister and communication protocol description

A.Module supported MODBUS function code and address range

Register type

Address range

Function code

Function code description

Coil register

00001-00004

0x01H

Read one or more coil registers

0x05H

Write a coil register

0x0FH

Write one or more coil registers

Open input register

10001-10004

0x02H

Read one or more open input registers

Input register

30001-30004

0x04H