DRAGINO · Converter · RS485 to LoRAWAN Converter · RS485-LB-EU868

The DRAGINO RS485-LB is an RS485 / UART to LoRaWAN converter for Internet of Things solutions. The user can connect an RS485 or UART sensor to the RS485-LB converter and configure the RS485-LB to regularly read sensor data and upload it to the IoT server via the LoRaWAN network.

RS485-LB can be connected to RS485 sensors, 3.3v/5v UART sensors or interrupt sensors. RS485-LB offers a 3.3 V output and a 5 V output for supplying external sensors. Both output voltages are controllable to minimise the overall power consumption of the system. RS485-LB is waterproof (IP67) and is powered by an 8500mAh Li-SOCI2 battery and is designed for long-term use over several years. RS485-LB runs with the LoRaWAN 1.0.3 standard in class A. It can achieve a large transmission range and can be easily integrated into LoRaWAN-compatible gateways and IoT servers.

For data uplink, RS485-LB sends customised commands to RS485 devices and receives the feedback message from the RS485 devices. RS485-LB processes this returned data according to the user-defined rules to obtain the final payload and upload it to the LoRaWAN server. For data downlink, RS485-LB runs in LoRaWAN Class A. When there are downlink commands from LoRaWAN server, RS485-LB forwards the commands from LoRaWAN server to RS485 devices. RS485-LB supports BLE configuration and wireless OTA update, which makes it easier for users to use.

Each RS485-LB is pre-loaded with a set of unique keys for LoRaWAN registration, these keys are registered with the LoRaWAN server and the connection is automatically established after power-on.

Performance features: 

• LoRaWAN 1.0.3 Class A
• Frequency band: EU868
• Ultra-low power consumption
• Supports multiple RS485 devices according to flexible rules
• Supports Modbus protocol
• Supports interrupt uplink
• Supports the connection of a UART sensor with 3.3V or 5V
• Supports Bluetooth v5.1 and LoRaWAN remote configuration
• Supports wireless OTA update firmware
• AT commands for changing parameters
• Uplink at regular intervals
• Downlink for changing the configuration
• 8500mAh Li/SOCl2 battery

Applications: 

• Intelligent buildings and home automation
• Logistics and supply chain management
• Intelligent consumption measurement
• Intelligent agriculture
• Intelligent cities
• Intelligent factory

Technical data:

Supply voltage: Built-in battery, 2.5v ~ 3.6v
Operating temperature: -40 ~ 85°C

I/O interface:

• Battery controllable output (2.6v ~ 3.6v depending on the battery)
• +5v controllable output
• 1 x RS485 interface
• 1 x UART interface, 3.3v or 5v
• 1 x interrupt or digital IN/OUT pins
• 1 x I2C interface
• 1 x one-wire interface

LoRa specification:

• Frequency range, band 1 (HF): 862 ~ 1020 Mhz
• Max. +22 dBm constant RF output vs.
• RX sensitivity: up to -139 dBm.
• Excellent blocking immunity

Battery:

• Non-rechargeable Li/SOCI2 battery
• Capacity: 8500mAh
• Self-discharge: <1% / year @ 25°C
• Max. Continuous current: 130mA
• Max. Charging current: 2A, 1 second

Current consumption:

• Sleep mode: 5uA @ 3.3v
• LoRa transmit mode: 125mA @ 20dBm, 82mA @ 14dBm

Scope of delivery:

1 x RS485-LB RS485/UART to LoRaWAN converter

Dimensions and weight:

• Size of the device: 9.7 x 6.5 x 4.7 cm
• Weight of the device: 150g
• Packaging size / piece: 14.0 x 8 x 5 cm
• Weight / piece: 180g