MB4AI4AO 4-канальный модуль сбора аналогового входа и выхода 0-20MA / 4-20MA 0-5V 0-10V RS485 MODBUS.

MB4AI4AO 4-канальный модуль сбора аналогового входа и выхода 0-20MA / 4-20MA 0-5V 0-10V RS485 MODBUS.

Chapter 1 Product Introduction

One.Overview

MB4AI4AO 4-channel analog quantity acquisition and 4-channel analog quantity output module, can collect 4-channel 0-20mA, 4-20mA, 0-5V, 0-10V four analog input signals and 4-channel 0-20mA, 4-20mA, Four analog signal outputs of 0-5V and 0-10V; the analog signal data collected by 4AI is output through the isolated RS485 interface, and the data output of 4AO can be controlled through the isolated RS485 interface; the module uses Modbus-RTU communication, which can be directly Equipped with PLC, DCS and various domestic configuration software.

Signal acquisition, signal output, power supply, and RS485 communication electrical signals are isolated from each other, effectively suppressing various types of series mode and common mode interference, ensuring the accuracy of the data, and also ensuring the reliable operation of the module.

two.Features

1.Adopt standard Modbus-RTU protocol.

2.The input signal type of each channel can be set according to your needs.

3.AOanalog output working mode

Module function mode

Features

Load preset value mode at power-on

1.Analog output [AOinitial power-on value] can be set to load a value, the default is to load0value.

2.When the module is powered on, the analog outputAO isloaded with [AOpower on initial value].

Power-up load power-down value mode

1.Continuously monitor the power supply of the module. When it detects that the power supply of the module is powered off, record and save the currentAOchannel output value.

2.When the module is powered on again, the analog outputAOloads the value before the last power-off.

Isolator mode

(Safety barrier working mode)

1.The output size of theanalog outputAO0is determined by the value of AI0.

2.Theoutput value ofAO0changes with the value of AI0, and the output is not changed by computer control

3.Several other channels and so on

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

5.Communication protection: RS485 communication signal output interface adopts over-voltage and over-current double protection.

6.Input signal type, output signal type, communication format can be set by software.

7.Power polarity protection.

three.Technical index

project

parameter

AI

signal input

1.Input channel: 4-channel isolated analog quantity acquisition

2.Input signal type: 0 ~ 20mA, 4 ~ 20mA, 0 ~ 5V, 0 ~ 10V four analog signals

3.Sampling rate: 4 channels are collected every 5mS

4.Resolution: 12 bit

5.Accuracy: voltage 0.2% current 0.3%

6.Isolation voltage protection: 1500V

AO

Signal output

1.Output channel: 4-channel isolated analog output

2.Output signal type:0 ~ 20mA, 4 ~ 20mA, 0 ~ 5V, 0 ~ 10V four analog signals

3.Sampling rate: 4 channels 5mS can be updated once

4.Resolution: 12 bit

5.Acquisitionaccuracy: voltage 0.2% current 0.3%

6.Isolation voltage protection: 1500V

RS485

Communication output

1.Communication protocol: MODBUS-RTU

2.Interface type: isolated RS485 communication, output interface adopts over-voltage and over-current double protection

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

4.Check digit: no check, even check, odd check

5.Setting method: module address, baud rate, parity bit can be set by software

6.Isolation voltage protection: 1500V

Module size

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

B.Box with terminal and rail size: 124mm * 72mm * 45mm

Installation method

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

working environment

Temperature: -10 ~ + 55 ℃ Humidity: 35% to 85% (no condensation)

Working power

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

2.Power consumption: less than 4W

four.Product appearance and peripheral wiring diagram

Fives.Module indicator and switch function description

1.POW / SET;module working status indication

A.Green light is on: the module is working.B. Red light is on: the module has configuration parameters written, need to power on again.

2.TXD / RXD:communication status indication

A.Green light flashes: data is received by communication B. Red light flashes: module is sending data

C. Thegreen light is always on: the communication RS485 line connected to DATA + and DATA- is reversed or the connection is broken.

3.Reset switch on the right side of the module

A.When the communication parameters (module address, baud rate, parity bit) are unknown or the communication parameters are set incorrectly, it is not possible to establish contact with the module communication. The solution is to reset the communication parameters; we use a paper clip to press and hold the reset switch. Release, after 5 seconds, the module [POW / SET] red indicator lights, release the reset switch, the communication parameters have been reset, as long as the power of the module is powered off and restarted once, the communication parameters of the module have been reset.

B.Communication parameters after reset: address: 1, baud rate: 9600bps, parity: none.

six.Typical application wiring diagram

Seven.Terminal definition

Terminal

name

Explanation

Terminal

name

Explanation

1

AI0

Analog input 0 channel positive terminal

14

A00I

Analog channel 0 current output

2

AI1

Analog input 1 channel positive terminal

15

A00V

Analog channel 0 voltage output

3

AI2

Analog input 2 channel positive terminal

16

AOGND

Analog channel 0 output negative terminal

4

AI3

Analog input 3 channel positive terminal

17

A01I

Analog channel 1 current output

5

AIGND

Analog input negative terminal

18

A01V

Analog channel 1 voltage output

6

AIGND

Analog input negative terminal

19

AOGND

Analog channel 1 output negative terminal

7

AIGND

Analog input negative terminal

20

A02I

Analog channel 2 current output

8

AIGND

Analog input negative terminal

twenty one

A02V

Analog channel 2 voltage output

9

NC

air

twenty two

AOGND

Analog channel 2 output negative terminal

10

DATA +

RS485communication +

twenty three

A03I

Analog channel 3 current output

11

DATA-

RS485communication-

twenty four

A03V

Analog channel 3 voltage output

12

+ Vs

Power input +

25

AOGND

Analog channel 3 output negative terminal

13

GND

power input-

26

AO24V

Analog output 24V power supply positive terminal

Eight.Principle block diagram

nine.MODBUSregister description

1.MODBUS function code supported by the module

Code

meaning

operating

0x03H

Read multiple holding registers

Read the value of one or more holding registers

0x 06H

Write a single holding register

Write a data to holding register

0x 04H

Read multiple input registers

Read the value of one or more input registers

0x 10H

Write multiple holding registers

Write one or more data to holding register

2.Register definition description

A.Input register(function code: 0x04H)

address

parameter

Read / write

Minimum value

Maximum

Explanation

30001

AI0

Read only

0

4095

Analog input channel 0 AD conversion value

30002

AI1

Read only

0

4095

Analog input channel 1 AD conversion value

30003

AI2

Read only

0

4095

Analog input channel 2 AD conversion value

30004

AI3

Read only

0

4095

Analog input channel 3 AD conversion value

B.Holding register (function code:0x03H, 0x06H, 0x10H)

address

parameter

Read / write

Minimum value

Maximum

Explanation

40033

AI0

Read only

0

4095

Analog input channel 0 AD conversion value

40034

AI1

Read only

0

4095

Analog input channel 1 AD conversion value

40035

AI2

Read only

0

4095

Analog input channel 2 AD conversion value

40036

AI3

Read only

0

4095

Analog input channel 3 AD conversion value

40049

AO0

Read and write

0

4095

Analog output control value, channel 0

40050

AO1

Read and write

0

4095

Analog output control value, channel 1

40051

AO2

Read and write

0

4095

Analog output control value, channel 2

40052

AO3

Read and write

0

4095

Analog output control value, channel 3

40065

Equipment type

Read only

0

256

5(MB4AI4AOmodule)

40066

equipment status

Read only

0

0x0101

Bit4: Reset button status

Bit0: Module reset request flag

40067

Module voltage

Read only

0

300

0.0-29.9V

40068

Module temperature

Read only

0

100

0-99℃degree(spare)

40069

product version

Read only

0

65535

Hardware version(high8bits) +software version(low8bits)

40070

Production information

Read only

0

65535

Year(high8digits) +batch number(low8digits)

40071

Module address

Read/write

1

247

1(default)

40072

Baud rate

Read/write

0

7

0 (1200) 1 (2400) 2 (4800) 3 (9600)Default4 (19200) 5 (38400) 6 (57600) 7 (115200)

40073

Check Digit

Read/write

0

2

0 (no parity.)Default1 (even parity) 2 (odd parity)

40076

Analog input

AIinput type

(Global)

Read and write

0

4

0:0-20mA (default) 1:4-20mA

2:0-5V 3:0-10V

4: Customize each channel input

40077

Analog outputAO

Working mode(global)

BIT:15-8

Read and write

0

3

0: Load power-on preset value at power-on(default)

1: Power on and load the value before the last power down

2: Isolator mode3: Customize the output of each channel

AnalogAOoutput type

(Global) BIT:7-0

Read and write

0

3

0:0-20mA (default) 1:4-20mA

2:0-5V 3:0-10V

40129

Analog input channel0

AI0input type

Read and write

0

3

0:0-20mA (default) 1:4-20mA

2:0-5V 3:0-10V

note

1.Only 40076 AI input type is set to 4, can be customized for each channel signal.

2. Aftersetting the register, also set the corresponding jumper

40130

Analog input channel1

AI1input type

Read and write

0

3

40131

Analog input channel2

AI2input type

Read and write

0

3

40132

Analog input channel3

AI3input type

Read and write

0

3

40145

Analog output channel0

AO0working mode

Read and write

0

3

Working mode of analog output channel

BIT:15-8

0: Load power-on preset value at power-on(default)

1: Power on and load the value before the last power down

2: Isolator mode

AnalogAOoutput typeBIT:7-0

0:0-20mA (default) 1:4-20mA

2:0-5V 3:0-10V

Precautions for use

1.Only 40077analog output working mode isset to 3, can you customize the settings of each channel signal.

2. Aftersetting the register, also set the corresponding jumper

3. Thefactory default of channel AO0, 1 voltage output is 0-5V,

The factory default of channel AO2, 3 voltage output is 0-10V,

The voltage output amplitude is calibrated, and the user cannot change it. If you have special requirements, you can contact the manufacturer for customization.

AO0output type

Read and write

0

3

40146

Analog output channel1

AO1working mode

Read and write

0

3

Analog output channel1

AO1output type

Read and write

0

3

40147

Analog output channel2

AO2working mode

Read and write

0

3

Analog output channel2

AO2output type

Read and write

0

3

40148

Analog output channel3

AO3working mode

Read and write

0

3

Analog output channel3

AO3output type

Read and write

0

3

40161

AO0power-on preset value

Read and write

0

4095

1.Analog output channel power-on loading value.

2.Itis validwhen theAOchannel output working mode of themodule isset to the power-on loading value.

40162

AO1power-on preset value

Read and write

0

4095

40163

AO2power-on preset value

Read and write

0

4095

40164

AO3power-on preset value

Read and write

0

4095

ten.AIanalog input channel sampling value (function code: 04H input register) is converted into actual data calculation method

1.0-20mAinput: actual value = collected value (decimal form) * 20 mA / 4096

2.4-20mAinput: actual value = collected value (decimal form) * 20mA / 4096

3.0 ~ 5Vinput: actual value = collected value (decimal form) * 5 V / 4096

4.0 ~ 10Vinput: actual value = collected value (decimal form) * 10V / 4096

5.When the channel is set to 4-20mA input and the channel input value is less than 4mA, the uploaded data is 4mA.

6.Calculation example:

If channel0 isset to4-20mAinput, the data read by the communication is0x0723H, the conversion decimal is1827, the calculation formula is:1827 * 20/4096 = 8.92mA

eleven.AOanalog output DAC control value (function code: 0x03H, 0x06H, 0x10H holding register) is converted into actual data calculation method

1.0-20mAoutput DAC output control value = X (actual current output value, decimal format) * 4096/20

2.4-20mAoutput DAC output control value = X (actual current output value, decimal format) * 4096/20

3.0-5Voutput DAC output control value = X (actual voltage output value, decimal format) * 4096/5

4.0-10Voutput DAC output control value = X (actual voltage output value, decimal format) * 4096/10

5.In the 4-20mA output range, the command output value less than 4mA will be output as 4mA.

6.Calculation example:If channel0 isset to4-20mAoutput, it needs to output10mAcurrent, the calculation formula is:10 * 4096/20 = 2048, the actual controlDACoutput value is2048.

twelve.Modbus RTUcommunicationanalog channel input command example (egmodule address:1)

1.Read1channel (read channel0):01 04 00 00 00 01 31 CA

2.Read4channels (read channels0 – 3):01 04 00 00 00 04 F1 C9

thirteen.Modbus RTUcommunicationanalog channel output command example (egmodule address:1)

1.Read1channel (read channel0):01 03 00 30 00 01 84 05

2.Read4channels (read channels0 – 3):01 03 00 30 00 04 44 06

3.Set1channel (set channel0):01 06 00 30 08 00 8E 05(set the output current value to10mA)

4.Set4channels (set channels0-3):01 10 00 30 00 04 08 08 00 08 00 08 00 08 00 F3 74

(Set the output current value to10mA)