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4-20mA Wireless Analog Transmitter 1W Modbus RTU 2km Remote Control

Basic Information
Place of Origin: China
Brand Name: Lensen
Model Number: LS-RAI04+LS-RAO04
Minimum Order Quantity: 2pcs
Price: Negotiation
Packaging Details: standard carton
Delivery Time: 2-7days
Payment Terms: T/T, Western Union,
Supply Ability: 6000pcs/month
Power Output: 1W Channels: 4AI
Input Type: 0-5V Or 4-20mA Or 0-10V Distance: 2km
Receiver Side: 4AO Frequency: 433MHz
High Light:

1W Wireless Analog Transmitter


4-20mA Wireless Analog Transmitter


2km Analog Input Module

Wireless Analog Input Module 4-20mA Signal Wireless Transmission Modbus RTU

LS-RAI04 4 channels analog input module
4 channels 4-20mA signal wireless transmission to PLC
0-5V analog signal wireless transmission
0-10V analog signal wireless transfer
2km wireless control in industry automation area
Lensen Wireless RTU features
- Portable device, DIN-rail mounting for easy installation
- Isolated inputs
- LEDs for power supply, communication, input, output status
- Flexible networking, point to point or point to multipoints
- DIP to change different modes
- Different types of I/O, DI, DO, AI, AO are available
- I/O expandable
- Short delay time
- Easy handing on RS485 network, support Modbus RTU protocol
- Support on-line upgrade. Can configure by customer in setting mode

Frequency 433MHz or 450MHz or 470MHz or 868MHz/915MHz or 4G
Power output 1W 
Products 4AI
Input type 4-20mA or 0-5V or 0-10V
Output type 4-20mA or 0-5V or 0-10V
Resolution ratio 24 bit
Accuracy ±0.02%
Power supply 9-36V DC usually use 24V DC
Interface RS-485
Channel No. 15ch default, can program via DIP switch
Antenna Sucker antenna with 1.5m cable
Working temperature -35 °C~+75 °C industrial
Working humidity 10%-90% relative humidity, no condensation
Dimension 115×90×40(mm)
Fix way Standard 3.5 inch industrial DIN guild rail


Advantage of wireless solution
- No wires to bury or maintain, no need to drill holes on wall
- Reliable communication in all direction,any terrain, regardless of hills, walls, trees
- Cost saving in installation and maintenance
- Radio/Lora based, no need internet and monthly fee, full ownership of the system
- 4G based, high speed, no distance limit

Modbus RTU communication and corresponding value
Register types:

Register types Read command

Write command
(Control command)

Power off Function
Hold register 0x01

Input --not support

Not keep Can read input value

A. Hold register
1. Analog input value: 0x0008~0x000B
2. Analog output value: 0x0048~0x004B
B: How to read
Hold register: can read 4 analog input or control 4 analog output at one time
Register control way



Function ID items support
No. IC Type PLC ID Modbus ID
AI1 Hold register 40009 8 Read 03 2AI/4AI
AI2 Hold register 40010 9 Read 03
AI3 Hold register 40011 10 Read 03 4AI
AI4 Hold register 40012 11 Read 03
AO1 Hold register 40073 72 Read/write 03/06 2AO/4AO
AO2 Hold register 40074 73 Read/write 03/06
AO3 Hold register 40075 74 Read/write 03/06 4AO
AO4 Hold register 40076 75 Read/write 03/06

About value calculation
Analog input
Our analog module’s max measure range value is : 0X7FFF
1. Directly measure current and voltage
Exact value=value you read/0x7FFF*max range
For example: to read the 1st passage of module’s (with max range of 0-20mA) input value
Register 0x0008(analog input of the 1st passage)
Feedback: 0x3801
Current value: (0x3801/0x7FFF)*20mA=8.7509mA
2. To measure sensor’s value(4-20mA, 0-6 meter level sensor)
If feedback value is less than 6554, level value is 0
If feedback value is bigger than 6554, level value=(value read-6554)/(32767-6554)*measure ranges
For example: feedback value is 0X3801, then corresponding level value is: ((0X3801-6554)/26213)*6 meter=1.7815 meter
Analog output
Analog module’s max measure range is: 0x7FFF
Directly control output current and voltage
Write register value=current or voltage value/measure range*0x7FFF
For example: to control the 1st passage of analog module whose max measure range is 0-20mA
Register 0x0048 (analog output of the 1st passage)
To write register value:(8.75/20mA)*0X7FFF =14336=0x3800

Contact Details

Phone Number : +8613826574847

WhatsApp : +8613826574847