Last Updated on : 2023-05-31 10:40:06download

A BMS box (UART) is a cellular-based battery management system (BMS) with a positioning function. It is built with Tuya’s proprietary 4G LTE Cat.1 module LZ501-CN and positioning module GUC300. This BMS box features battery information reporting, battery parameter configuration, remote control, and fault alerts.

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Contact your account manager to request the BMS box.

Feature description

  • Support for integration with BMS manufacturer’s protocol
  • Battery data upload
  • Battery parameter configuration
  • Remote control of battery
  • Battery fault alerts
  • LBS and Wi-Fi combo positioning
  • Route tracking
  • Fault alerts
  • Remote configuration
  • FOTA firmware updates

Product specifications

Specification Description
Size 87.2 mm × 40 mm × 19 mm
Weight About 60g
Communication module LZ501-CN
Positioning module GUC300
Antenna Built-in 4G antenna
Bluetooth antenna Built-in Bluetooth antenna
Wi-Fi antenna Built-in Wi-Fi antenna
GPS antenna 25 mm × 25 mm × 4 mm ceramic antenna
Wiring harness
  • Power supply (red)
  • Ground (black)
  • UART RX (white)
  • UART TX (yellow)
  • UART GND (purple)
CPU Cortex-A5, 500 MHz
Storage 128 MB RAM, 64 MB ROM
SIM card Nano SIM or eSIM card
Operating temperature -25°C to 75°C
Storage temperature -40°C to 85°C
Power consumption Active: 5 mA to 7 mA
Sleep: 1.3 mA
Sensor 3-axis G-sensor
Power supply IC 9V to 85V DC-DC
LED indicator
  • Power (red)
  • GPS (blue)
  • Network (green)
Frequency bands
  • LTE-FDD: B1/B3/B5/B8
  • LTE-TDD: B34/B38/B39/B40/B41
Maximum rate
  • Maximum download speed of 10 Mbps
    Maximum upload speed of 5 Mbps
  • Maximum download speed of 8.2 Mbps
    Maximum upload speed of 3.4 Mbps


Instructions on installing 4G BMS box (UART)

Step 1: Install the SIM card.
Step 2: Connect the wire.

Harness description:

Type Description
Power supply Red wire, connected to 12V to 85V power supply.
Ground Black wire, the ground wire.
UART RX (white) White wire, the UART receiver.
UART TX (yellow) Yellow wire, the UART transmitter.
UART GND (purple) Purple wire, the UART ground.

The BMS box comes with a 2-pin power connector and a 3-pin UART connector. You can customize the connectors to match the battery and device.