4 Channels Analog I O Module Wireless Analog Inputs 4-20mA / 0-5V Wireless Transmission 2km

LS-RAI04 wireless analog acquisition module
 
LS-RAI04 Modbus RTU is a 1W I/O module, 4 analog inputs, 1 RS485 (wireless RS485 customizes). Wireless control 2km-3km. Use for sensor data wireless collection.
 
Character:
Transparent I/O System
Not need internet, no third party cell, no monthly fees
You have full control over your own carrier
Real time status feedback from the remote site
Fast installation and easy setup
 
 
Paramaeter

 
Modbus RTU communication and corresponding value
 
Register types:

 
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
 

 
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 1^st 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