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LS-WJ21 AD DA Converter 4-20ma Input RS485 Output Modbus RTU Protocol Din Rail Mounting

I am pleased with them. It was a good choice for our small application. It is a robust device even it has a cheap price. I will use them in our further applications when we should use remote control. Thank you for your support.

—— Codreanu from Romania

Great news! We successfully performed the installation of the two units and transmitted our 4-20mA signal with both antennae. Even the smaller antenna suffices to transmit the signal without any losses whatsoever. So you can understand that we are very happy :) .

—— Kekarios from Greek

I believe you and your products. Sunny is very responsible. The RF modules are really strong and stable. Engineer's suggestions are useful to me. The most important is module's program can updrade on-line by myself. For some special projects, they can customize according my requirements. Thank you for your support all the time.

—— Singh from India

First of all I'd like to thank you for you're prompt service. The system now works perfectly. I left a positive response on your web site. I hope it attracts more customers for you.

—— Peter from Australia

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LS-WJ21 AD DA Converter 4-20ma Input RS485 Output Modbus RTU Protocol Din Rail Mounting


Large Image :  LS-WJ21 AD DA Converter 4-20ma Input RS485 Output Modbus RTU Protocol Din Rail Mounting

Product Details:
Place of Origin: China
Brand Name: LS
Certification: CE
Model Number: LS-WJ21
Payment & Shipping Terms:
Minimum Order Quantity: 1pc
Price: negociate
Packaging Details: standard
Delivery Time: 3-6 days
Payment Terms: T/T, Western Union, Paypal
Supply Ability: 10000pcs
Detailed Product Description
Input: PT100, PT1000, CU50, CU100 Output: RS485
Mounting Way: Din-rail Mounting Power Supply: 24V DC
High Light:

high end da converter


universal audio ad converter

Analog measurement module LS-WJ21 is an A/D converter allowing you to measure analogue signal 0-10V or 0(4)-20mA. Measured out values are send to a PC or other system by means of RS232 or RS485 line.





  1. Analog signal input for voltage or current, isolated RS-485/232 output
  2. 12-bit AD converter, testing accuracy>0.1%
  3. Can Program and calibrate modules accuracy via RS-485/232 interface
  4. Signal input/output: 3000VDC Isolation
  5. Wide Power supply: 8~32VDC
  6. High reliability, easy programming, easy installation.
  7. Can program setting module address, baud rate
  8. 0-5V/0-10V/0-12V voltage signal or 4-20mA/0-20mA current signal input
  9. Supports Modbus RTU protocol
  10. DIN35 Rail-mounted
  11. Dimension: 106.7x79.0x25.0 mm

Signal testing/monitoring/control
RS-232/485 industrial automation control system
Industrial field signal isolation
Process Monitoring & Control
Test sensors signal
Laboratory Data Acquisition
Medical machine monitoring
4-20mA/0-5V signal acquisition


Products selection guidance:

Input Signal Output
Voltage Current

485: RS-485 output interface


232: RS-232 output interface

U1:0-5V A1:0-1mA
U2:0-10V A1:0-10mA
U3:0-75mV A1:0-20mA
U4:0-2.5V A1:4-20mA
U5:0-±5V A1:0-±1mA
U6:0-±10V A1:0-±10mA
U7:0-±100mV A7:0-±20mA
U8:user-defined A8:User-defined


Contact Details
Shenzhen Qianhai Lensen Technology Co., Ltd

Contact Person: Sunny

Tel: +8613826574847

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