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Mateksys CAN-L4-BM

Manual do usuario do monitor de potencia dixital Matek Mateksys AP_PERIPH CAN-L4-BM

Model: CAN-L4-BM

Marca: Mateksys

1. Introdución

The Matek Mateksys AP_PERIPH CAN-L4-BM is an ultra-precise digital power monitor designed for applications requiring accurate current and voltage measurements via the CAN bus. It utilizes the TI INA239 IC and runs ArduPilot AP_Periph firmware, supporting the CAN/DroneCAN protocol. This device provides reliable power monitoring without the need for calibration.

2. Características

  • Ultra-precise digital power monitoring.
  • Based on TI INA239 and ArduPilot AP_Periph firmware.
  • Supports CAN/DroneCAN protocol.
  • No calibration required for accurate current and bus voltage readouts.
  • Low power loss due to 200µΩ typical conductive path resistance.

3. Especificacións

  • MCU: STM32L431xC, 256KB Flash
  • Power Monitor IC: INA239 (85-V, 16-Bit, High-Precision)
  • Batería Voltage Sense Input: 0 ~ 85 V
  • Current Sense Range: 0~204.8A
  • Load Current on Sensing Resistor: 150A (Continuous), 204.8A (Burst)
  • Voltage Precisión: 0.1 %
  • Precisión actual: 2%
  • Interface: CAN (DroneCAN Protocol), UART2 (spare, DFU), ST debug (SWCLK & SWDIO)
  • Fonte de alimentación: 4.5~5.5V @5V pad/pin
  • Consumo de enerxía: 10 mA
  • Temperaturas de funcionamento: -40~85 °C
  • Tamaño do taboleiro: 30 mm x 22 mm x 3 mm
  • Peso: 4g
  • Firmware: ArduPilot AP_Periph (Update via DroneCAN GUI Tool)

4. Produto rematadoview

Disposición de compoñentes

Matek Mateksys CAN-L4-BM Digital Power Monitor with included JST-GH-4P cable
Imaxe: Matek Mateksys CAN-L4-BM Digital Power Monitor with included JST-GH-4P cable. This image displays the compact size of the board and its primary connection interface, along with key specifications like current and voltagintervalos e.
Matek Mateksys CAN-L4-BM board with dimensions
Imaxe: Arriba abaixo view of the CAN-L4-BM board with precise dimensions (30mm x 22mm x 3mm) and mounting hole specifications. This illustrates the physical footprint of the device for integration planning.
Matek Mateksys CAN-L4-BM board close-up showing components
Imaxe: Primeiro plano view of the CAN-L4-BM board, highlighting the STM32L431xC MCU, INA239 IC, and various connection pads including JST-GH-4P, 5V, CAN-H, CAN-L, and GND. This provides detail on the board's internal layout.
Matek Mateksys CAN-L4-BM integrated with XT60 connectors
Imaxe: The CAN-L4-BM power monitor integrated with XT60 connectors, demonstrating a typical wiring configuration for power input and output in a system. This shows a practical application setup.

5. Configuración e instalación

Instrucións de cableado

Proper wiring is crucial for accurate readings and safe operation of the CAN-L4-BM.

Wiring diagram for CAN-L4-BM with single battery and external BEC
Imaxe: Wiring diagram illustrating how to connect the CAN-L4-BM to a flight controller and battery for current and voltage monitoring. This diagram shows a single battery setup with an external BEC for power to the flight controller.
Wiring diagram for CAN-L4-BM with dual battery and built-in BEC
Imaxe: Advanced wiring diagram showing connection of the CAN-L4-BM to a flight controller with a built-in 5V BEC, and a dual battery setup for current and voltage monitoring. This configuration allows for monitoring two separate power sources.

General Wiring Tips

  • Solder the positive wires as close as possible to both sides of the current sensing resistor on the board for optimal accuracy.
  • Ensure a common ground connection between the flight controller and the ESC/Load to prevent ground loops and ensure stable operation.
  • If CAN wires are excessively long, bridge the 120R jumper on the CAN-L4-BM board to maintain signal integrity.
  • The large pad on the bottom side of the board is a dead pad and has no circuit network; it can be used for structural support if needed.
  • The two mounting ears can be carefully cut off if not required for installation in space-constrained environments.

Configuración de firmware

The CAN-L4-BM runs ArduPilot AP_Periph firmware. Configuration is performed via the DroneCAN protocol through your flight controller's settings.

  1. Connect the CAN-L4-BM to your flight controller's CAN bus port.
  2. Set the appropriate parameter in your flight controller's firmware to enable the CAN driver:
    • For CAN bus1: CAN_P1_DRIVER = 1
    • For CAN bus2: CAN_P2_DRIVER = 1
  3. Configure battery monitoring by setting: BATTx_MONITOR = 8 (DroneCAN-BatteryInfo), where 'x' corresponds to the battery monitor instance you are configuring.
  4. Firmware updates for the CAN-L4-BM can be performed using the DroneCAN GUI Tool.

6. Funcionamento

Indicadores LED

  • Blue LED (Fast blinking): Indicates the board is in the process of booting up.
  • Blue LED (Slow blinking): Indicates the board is working correctly and communicating via CAN.
  • LED vermello: Indicates that 3.3V power is present on the board.

Monitorización de datos

Once properly configured and powered, the flight controller will receive accurate current and bus voltage data from the CAN-L4-BM via the DroneCAN bus. This data can be logged and monitored through your flight controller's telemetry system or compatible ground station software.

7. Mantemento e mellores prácticas

  • Regularly inspect all soldered connections for integrity and signs of wear or corrosion.
  • Keep the board free from dust, moisture, and debris to ensure optimal performance and longevity.
  • Ensure proper ventilation if operating the device in enclosed spaces, although the CAN-L4-BM has a wide operating temperature range.
  • Avoid exposing the board to extreme environmental conditions (e.g., excessive humidity, direct water contact) beyond its specified operating range.

8 Solución de problemas

Problemas comúns

  • No data from monitor:
    • Verify all CAN bus connections (CAN-H, CAN-L, GND, 5V) are secure and correct.
    • Check the LED indicators for proper boot and operation (a slow blue blink indicates normal function).
    • Garantir CAN_P1_DRIVER or CAN_P2_DRIVER is set correctly in the flight controller parameters.
    • Confirma iso BATTx_MONITOR = 8 is set for the correct battery monitor instance.
    • Check for any short circuits or incorrect voltage supply to the CAN-L4-BM board.
  • Lecturas inexactas:
    • Ensure positive wires are soldered as close as possible to the current sensing resistor on the board.
    • Verify common ground connections between all components in the power system.
    • Check for any physical damage to the board or its components that might affect sensor accuracy.
  • A placa non se acende:
    • Confirm that a stable 4.5~5.5V supply is provided to the 5V pad/pin.
    • Check the Red 3.3V indicator LED; if it's off, there might be a power issue.
    • Inspect all power supply wiring for breaks or incorrect connections.

9. Contacto e asistencia

For further assistance, technical support, or to access additional resources, please refer to the official Mateksys documentation available on their website or consult relevant community forums for ArduPilot and DroneCAN users.