FlyCore Power Distribution Board Accessory Instructions

Ignoring any of the following warnings may result in permanent equipment damage, personal injury, or fire. Follow each one strictly.

• Disconnect Power Before Work (Primary Rule)
  Before performing any wiring, soldering, plugging, unplugging, or maintenance, you must verify with 100% certainty that the input power source (battery) has been physically disconnected. Even if the power distribution board indicator or the equipment appears to be "off," the board and downstream equipment (flight controller, computer, ESCs, etc.) may still be energized as long as the battery remains connected.
• Never Reverse the Polarity (Critical Hazard)
  Never reverse the positive and negative power connections. If no built-in reverse-polarity protection is present, reversing the connections will cause an instantaneous short circuit and extremely high current, almost certainly destroying the power distribution board and all connected equipment (flight controller, onboard computer, gimbal, etc.). Check the polarity repeatedly before connecting the XT60 connector or soldering BATT+/BATT-.
• Verify Zero Voltage Before Soldering
  Before soldering any pad (ESC power, BATT+, BATT-, etc.), use a multimeter to verify that there is no residual voltage across the pads. Even after the battery is disconnected, large onboard capacitors may retain a charge. Soldering without first discharging them can cause a short circuit, arcing, pad damage, or electric shock.
• Never Plug or Unplug While Powered
  Never plug or unplug any connector while power is applied (especially the XT60 input and PWM/CAN interfaces). Hot-plugging can generate inrush current and arcing, erode contacts, increase contact resistance, and even destroy sensitive components.
• Inspect Solder Joints and Cables
  Solder joints must be full and free of cold joints and solder bridges. Use the continuity mode of a multimeter to check adjacent pads for short circuits. Remove debris from the board after soldering. Power cables must be rated to carry 40A, and their insulation must be undamaged.
• Never Exceed the Ratings
  The input voltage is strictly limited to 21V ~ 34V, and the continuous current must not exceed 40A. Excessive voltage or current may cause overheating, damage, or even fire.
• Final Check Before Power-On
  Before applying power, visually inspect all polarities and connections again, and ensure that no conductors are exposed. For the initial power-on, a current-limited power supply or a series fuse/light bulb test is recommended.
• Emergency Response
  If smoke, an unusual odor, or abnormal heating occurs after power is applied, disconnect the power immediately (unplug the battery) and do not continue operation. If damage occurs, do not attempt to disassemble or repair the high-voltage section yourself; contact technical support.