LM100 | LC144

The LM100/LC144 utilizes the latest Low Power Wireless Access (LPWA) technology to build Modbus/RTU communication for long-distance, wide-coverage, and low power consumption wireless IoT applications. Multiple analog inputs and outputs are supported in LC144, such as voltage inputs and outputs, current inputs and outputs, PWM output and one RS-485 port for Modbus RTU slave.One LM100 RS485 Modbus RTU can connect up to 250pcs LC144 LoRa end nodes for two-way communications where field site analog signals are sent to LM100 and controlled by LM100. The LoRa wireless distance can reach up to 3-6KM distance depending on the environment. The LM/LC144 offers great flexibility in wireless IoT applications, such as LED light control, environment sensors and meters reading for Smart City Applications such as Lighting, Smart Farming, Smart Environment Monitor, etc.
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Modbus/RTU Extension by LoRa

•Transparent Two-Way Modbus Communication by LoRa
•LM100 Sends Modbus Control to LC144 LoRa End node
•LC144 Send Modbus Data through LM100 Modbus Slave to Modbus Master

0~10V Input / Output

•2 Channels 0~10V High Impedance Input-  Luminance Sensing
•1 Channel 0~10V Open Drained Output, Dimmer Control

4~20mA Input / Output

•2 Channels Current Sensing, 0.2%High Accuracy
•1 Channel Current Output, 0.3% High Accuracy

Tradition Modbus/RTU Operating Mode

•Utilize Modbus/RTU protocol for LoRa Agent / LoRa Node configure and communication
•Auto forward Modbus Data to Far-End node
•Auto re-present Far-End Modbus Data at Local Bus

PWM Output with Duty Cycle Control

•5V PWM Output / 30V Open Drained (O.C.)
•Duty Cycle Adjustable -  100Hz~1Khz , 0.2% Accuracy

Reliable LoRaMAC Radio Communication

•ECHO mechanism – LoRa Agent / LoRa Node
•Configurable Retransmit Mechanism- LoRa Agent
•Configurable Modbus Response Time-Out for wireless delay

Modbus/RTU Slave

•1 RS-485 2-wires for Modbus/ RTU Slave device
•Transparent Modbus/RTU Device ID & Register

Windows© Configure Tools

•User-Friendly, Model Auto Detection
•Analog IO Parameter Configuration and Auto Display
•Micro-USB Configuration

Secured Radio Communication

•AES 128 Data Encryption
•Configurable Encryption Key – Modbus Register Writing

Industrial Application

•9~30V DC wide power range input
•Low Power Consumption
•Wide Coverage up to 6KM
•Max.250 LC144 Nodes to one LM100
•-40 ~ 75°C / 90%H  Operating Temperature / Humidity
•Compliance IEC 61000-6-2/-6-4 Heavy Industrial EMC

Wireless Specification
Frequency EU 433Mhz, EU 868Mhz, US915Mhz, AS 923Mhz, KR 920Mhz
Wireless Technology Low Power Wide Access – LoRa MAC Technology
Radio TX Power 22dBm
Radio RX Sensitivity - 148dBm, SF=12 @ 250bps
Spreading Factor SF5/SF6/SF7/SF8/SF9/SF10/SF12, Default SF7
Remote  Configurable by ModBus RTU / Register writing command
Demodulator SNR LoRa Demodulator Signal to Noise Ratio: -2.5dB ~ -20dB
Operating Mode Modbus protocol over the Air (LoRa MAC Transparent Transmission) with configurable Echo time and retransmission technology
Forwarding Data Buffer 256Bytes FIFO Data Buffer for LoRa signal transmission
Data Encryption 128bits AES with configurable key
System Management 1 x Micro USB 2.0 port for system configuration
Software Utility Windows© Based  Utility
Remote Management Remote Configure by Modbus RTU/ Read/Write Command
I/O Interface
Antenna Connector 1x 50 ohm, Female SMA
Serial Interface 2-wires RS-485 Terminal Connector with 1kv isolation
Connector Type: Removable Terminal Connector
Supported Model: LM-100 (Slave), LC-100(Host)
Serial Parameters Baud Rate: 1200bps, 4800bps, 9600bps,115,200bps
Data Bits: 8
Parity Check: None
Stop Bit: 1
CRC: Enable (default)
Current Input 2 Channels
Detection Range: 4-20mA
Accuracy Level: 0.3%
Voltage Input 2 Channels
Detection Range: 0~10 V
Accuracy Level: 0.2%
Current Output 1 Channel
Output Range: 4-20mA @ Typical 24V Power Input
Accuracy Level: 0.3%
Voltage Output 1 Channel
Output Range: 0~10V
Output Type: Open Collect (O.C.)
Accuracy Level: 0.2%, Full Scale (F.S.)
PWM Output Frequency: 100Hz~1KHz with 0.2% Duty-Cycle Accuracy
Output Type-1: 5V, 200mA (Max)
Output Type-2: Open Collect (O.C.), 10V /200mA (Max)
System Indication  
LED Power (On):  System Power applied
LoRa (Blinking): LoRa RF Signal on Communication
Power Requirement
Input Rating Typical DC 24V, Rating: 10~30V
3-Pins Removable Terminal Connector for V+ ,Com and Earth Ground
Reverse Protection Yes
Power Consumption LM100: 1 Watt  @ DC 24V  power input
LC144: 3 Watts @ DC 24V power input
Installation DIN Rail Mount
Enclosure Material UL94v0, ABS , Anti- U/V
Ingress Protection IP 40
Dimension 26(D) x 102.5 (H) x 72 mm (W)  / with wall mounting clip
Weight 115g
Operating Temperature -40°C~75°C, 0% ~ 90%, Non-Condensing
Storage Temperature -40°C~80°C, 0% ~ 90%, Non-Condensing
Reliability & Warranty
MTBF 20000> Hours
Warranty 3 Years, No-Natural damaged
EMC Compliance with IEC / EN61000-6-2, IEC/ EN61000-6-4
EMI Electromagnetic Immunity: CISPR 22, FCC part 15B Class A
EMS Electromagnetic Suspension:
IEC 61000-4-2 ESD
IEC 61000-4-3 RS
IEC 61000-4-4 EFT
IEC 61000-4-5 Surge
IEC 61000-4-6 CS
IEC 61000-4-8 Pulse Magnetic Field

Transparent LoRa Communication to extend Two-Way Modbus Sensor Read and Control


User-Friendly Utility to configure Analog IO parameters

The LM100 and LC144 are configured through a user-friendly Windows utility free downloaded from www.womaster.eu and with a micro USB cable to connecting the device and the PC.

Model Description


 LoRa /Modbus RTU Client Agent

1 x  RS-485 Slave 2-wire, 1 x SMA LoRa Antenna Connector


LoRa End-Node, 8CH AIO, 1 Modbus RTU 485 Host

2 x 0~10V input, 0.2% accuracy

2 x 4~20mA input, 0.3% accuracy

1 x 0~10V Output, Open Collect (O.C.) Type, 0.2% accuracy

1 x 4~20mA Output, 0.3% accuracy

1 x PWM Output (0~5V), 200mA (max), 0.2%Duty_Cycle Accuracy  @1khz

1 x PWM (0~10V), Open Collect (O.C.) Type, 200mA, 0.2% Duty Cycle accuracy  @1Khz, 10V(Max)

1 x RS485 Host, 2-wire

1 x SMA /LoRa Antenna Connector


850~930 Mhz by software configuration


410~493 Mhz by software configuration

Packing & Accessories
LoRa Device x 1
Antenna x 1
Quick Installation Guide x1