Dragino RS485-NB - RS485/UART to NB-IoT Converter NB-IoT

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The Dragino RS485-NB is a RS485 / UART to NB-IoT Converter for Internet of Things solutions.


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The Dragino RS485-NB is a RS485 / UART to NB-IoT Converter for Internet of Things solutions. User can connect RS485 or UART sensor to RS485-NB converter, and configure RS485-NB to periodically read sensor data and upload via NB-IoT network to IoT server.

RS485-NB can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-NB provides a 3.3v output and a 5v output to power external sensors. Both output voltages are controllable to minimize the total system power consumption.

RS485-NB supports different uplink methods including MQTT, MQTTs, UDP & TCP for different application requirement, and support uplinks to various IoT Servers.

RS485-NB supports BLE configure and OTA update which make user easy to use.

RS485-NB is powered by 8500mAh Li-SOCI2 battery, it is designed for long-term use up to severa years.

RS485-NB has optional built-in SIM card and default IoT server connection version. Which makes it works with simple configuration.


    NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
    Support multiply RS485 devices by flexible rules
    Support Modbus protocol
    Support Interrupt uplink
    Supports connecting a UART sensors with 3.3V or 5V
    Multiply Sampling and one uplink
    Support Bluetooth v5.1 remote configure and update firmware
    Uplink via MQTT, MQTTs, TCP, or UDP
    Ultra Low Power consumption
    Uplink on periodically
    Downlink to change configure
    8500mAh Battery for long term use
    Nano SIM card slot for NB-IoT SIM


    Logistics and Supply Chain Management
    Smart Buildings & Home Automatio
    Smart Metering
    Smart Agriculture
    Smart Cities
    Smart Factory

NB-IoT Spec:

    NB-IoT Module: BC660K-GL
    Support Bands: B1 @H-FDD: 2100MHz, B2 @H-FDD: 1900MHz, B3 @H-FDD: 1800MHz, B4 @H-FDD: 2100MHz, B5 @H-FDD: 860MHz, B8 @H-FDD: 900MHz, B12 @H-FDD: 720MHz, B13 @H-FDD: 740MHz, B17 @H-FDD: 730MHz, B18 @H-FDD: 870MHz, B19 @H-FDD: 870MHz, B20 @H-FDD: 790MHz, B25 @H-FDD: 1900MHz, B28 @H-FDD: 750MHz, B66 @H-FDD: 2000MHz, B70 @H-FDD: 2000MHz, B85 @H-FDD: 700MHz

I/O Interface:

    Battery controllable output (2.6v ~ 3.6v depends on 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


Absolute Maximum Ratings:

    VCC: 0.5v ~ 3.9v
    Operating Tempature: -40 ~ 85°C
    I/O pins: 0.5v ~ VCC+0.5V


Common DC Characteristics:

    Supply Voltage: 1.8v ~ 3.6v
    Operating Tempature: -40 ~ 85°C


Power Consumption:

    STOP Mode: 10 μA @ 3.3v
    Max transmit power: 350mA@3.3v.



    Li/SOCI2 unchargable battery
    Capacity: 8500mAh
    Self Discharge: <1% / Year @ 25°C
    Max continuously current: 500mA
    Max boost current: 2A, 1 second