12AI 4-20mA 12bit RS485 Modbus Current Acquisition Module

12AI 4-20mA 12bit RS485 Modbus Current Acquisition Module
Brand: NiTwo
Product Code: 12AI 12bit Modbus
Availability: In Stock
Price: $99.00
Qty:     - OR -   Add to Wish List
Add to Compare
Item specifics
  • is_customized: Yes
  • Type: Industrial Computer Accessories
  • Current: 4-20mA
  • 12AI: 4-20mA
Product Description




12 Channel 4-20mA analog current acquisition measure sampling converter RS485 board  support  modbus-RTU for PLC singlechip 




Communication baud rate: 9600.8.N.1        Data format: hexadecimal

Communication modbus-RTU protocol and function:

————Read 4~20mA Current value————

For example:

A 4-20MA module as a slave communicate with master by RS485,and,read the current value of 12 channel (I0~IB).

The master send the message as this format:

Send content                                      Bytes        Send data                 Meaning

Slave address                                          1               01                      No. 01 Slave

Function code                                          1               03                      Read register

Register starting address                         2               0003                 The Command of reading

The number of words for reading              2               000C                 The amount of channel.

CRC check                                             2               XXXX                 The CRC result


The slave feedback the Current value one by one from channel I0 to channel IB.

The feedback format from the slave:

Send content                               Bytes        Send data                 Meaning

Slave address                              1               01                      No. 01 Slave

Function code                              1               03                      Read register

Feedback length                         1               18         Feedback 24 bytes Current value(H18 = 24)

The feedback date                      24             0363                 *00 channel,8.67mA

                                                                  05F5                  01 channel,15.25mA

                                                                  ...                       ... ...

                                                                  06E8                  0B channel,17.68mA

CRC check                                 2               XXXX                 The CRC result

* It’s a signed double word of each channel, and it’s 100times of the real Current value when Hex to Dec

H0363= 867 ----->  867/100 = 8.67 mA




Packaging Details
  • Unit Type: piece
  • Package Weight: 0.500kg (1.10lb.)
  • Package Size: 20cm x 20cm x 10cm (7.87in x 7.87in x 3.94in)

Write a review

Your Name:

Your Review: Note: HTML is not translated!

Rating: Bad           Good

Enter the code in the box below: