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LS-WJ28 8CH Analog Signal 4-20mA or 0-5V to Serial RS485 RS232 Converter

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-WJ28 8CH Analog Signal 4-20mA or 0-5V to Serial RS485 RS232 Converter

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Large Image :  LS-WJ28 8CH Analog Signal 4-20mA or 0-5V to Serial RS485 RS232 Converter

Product Details:
Place of Origin: China
Brand Name: LS
Certification: CE
Model Number: LS-WJ28
Payment & Shipping Terms:
Minimum Order Quantity: 2pc
Price: negociate
Packaging Details: standard
Delivery Time: 3-6 days
Payment Terms: T/T, Western Union, Paypal
Supply Ability: 10000pcs
Detailed Product Description
Input: Analog Signal 8 Channels Output: RS485/RS232
Mounting Way: Din-rail Mounting Power Supply: 24V DC
High Light:

4-20mA 8 Channels Analog Converter


0-5V 8 Channels Analog Converter


RS232 Data Acquisition Converter

LS-WJ28 series 8 inputs channel Current/Voltage signal to RS485/232 Converter, 24 Bits AD data acquisition

LS-WJ28 8CH Analog Signal 4-20mA or 0-5V to Serial RS485 RS232 Converter 0


Eight analog signal acquisition, isolated converter RS-485/232 output
24-bit AD converter, accuracy>0.05%
4-20mA/0-20mA current signal or 0-5V/0-10V voltage signal input
RS-485/232 interface can be programmed calibration module accuracy
Signal input / output:3000VDC isolation
Wide supply range: 8 ~ 32VDC
High reliability, easy programming, easy to apply
Standard DIN35 rail mounting
User-programmable settings module address, baud rate, etc.
Support the Modbus RTU protocol
Low cost, small size modular design
Size: 120x60x43mm


Typical applications:
signal measurement, monitoring and control
RS-485 remote I / O, data acquisition
application of intelligent building control, security engineering
industrial automation control system, the RS-232/485 bus

Industrial signal isolation and long-term transmission
equipment operation and monitoring
measurement of sensor signals
the industrial data acquisition and recording
medical, industrial and product development


Product List:

WJ28 - U(A)□ - □

Input voltage or current signal Communication Interface

U1: 0-5V A1: 0-1mA                                           485: RS-485 output interface

U2: 0-10V A2: 0-10mA                                       232: RS-232 output interface

U3: 0-75mV A3: 0-20mA

U4: 0-2.5V A4: 4-20mA

U5: 0-±5V A5: 0-±1mA

U6: 0-±10V A6: 0-±10mA

U7: 0-±100mV A7: 0-±20mA

U8: user-defined A8: user-defined


Selection Samples:
Part No.:WJ28-A4-485 (means 8 channels 4-20mA input,ouput is RS485 interface)
Part No.:WJ28-U1-232 (means 8 channels 0-5V input,output is RS232 interface)
Part No.:WJ28-U2-485 (means 8 channels 0-10V input,output is RS485 interface)
Part No.:WJ28-(A4)6(U2)2-485

(Means 6 channels 4-20mA input, 2 channels 0-10V input, output is RS485 interface)


LS-WJ28 8CH Analog Signal 4-20mA or 0-5V to Serial RS485 RS232 Converter 1


How to set Modbus RTU communication protocol:

Module default protocol is character communications protocol. If you need to set the module to Modbus RTU protocol, please follow these settings:

1. Put INIT switch to INIT position.
2. Connect the power cord and the communication interface cable.
3. Turn on the power, the module enters the default state automatically, address 00, baud rate 9600.
4. Wait 5s, module is initialization.
5. Send the command $00P1(cr), check the response, if is !00 (cr), set successfully.
6. Turn off the power, INIT switch to the NORMAL position.
7. The module has been set to the Modbus RTU protocol mode successfully.


Note: when you order, please choose your input and output or note your Part No..


LS-WJ28 8CH Analog Signal 4-20mA or 0-5V to Serial RS485 RS232 Converter 2




Contact Details
Shenzhen Qianhai Lensen Technology Co., Ltd

Contact Person: Sunny

Tel: +8613826574847

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