GEPRC HEX X PDB V1.0 Hexacopter Power Distribution Board User Manual

1. Introduction

The GEPRC HEX X PDB V1.0 is a high-performance Power Distribution Board designed specifically for hexacopter (6-motor) FPV drone applications. It efficiently distributes power from your LiPo battery to multiple Electronic Speed Controllers (ESCs) and other onboard components, ensuring stable and reliable operation. This PDB supports a wide input voltage range and high current loads, making it suitable for demanding drone builds. This manual provides essential information for the proper installation, operation, and maintenance of your GEPRC HEX X PDB V1.0.

2. Product Overview

The GEPRC HEX X PDB V1.0 is a compact and robust power distribution solution. Below are images illustrating the board and its included components.

Figure 2.1: GEPRC HEX X PDB V1.0 (Angled View)

Figure 2.2: GEPRC HEX X PDB V1.0 (Top View)

Figure 2.3: GEPRC HEX X PDB V1.0 (Bottom View)

2.1 Product Contents

The package includes the following items:

Figure 2.4: Product List

• 1 × GEPRC HEX X PDB V1.0 Hexacopter Power Distribution Board
• 2 × 50V 2200μF Capacitors
• 2 × XT90+ Connectors with Protective Housing + 10AWG Silicone Wire
• 1 × SH1.0-10P to 8P EP-106 FC to PDB Connection Cable
• 8 × M3*8 Damping Balls

3. Specifications

Refer to the table below for detailed technical specifications of the GEPRC HEX X PDB V1.0.

Figure 3.1: Specifications Summary

4. Setup and Installation

Careful installation is crucial for the safe and reliable operation of your hexacopter. Follow these steps for proper setup:

4.1 Component Identification

Figure 4.1: PDB Connection Points (Top and Bottom)

Familiarize yourself with the connection points on the PDB:

• S1-S6: Solder pads for connecting the positive (+) and negative (-) leads of your six ESCs.
• BAT: Main battery input pads for connecting the XT90+ connector.
• GND: Ground connection point.
• CUR: Current sensor output for flight controller.
• E1-E8: Connector pins for the SH1.0-10P to 8P FC to PDB Connection Cable, used to transmit current sensor data and potentially other signals to the flight controller.

4.2 Mounting the PDB

1. Mount the PDB to your hexacopter frame using the provided M3*8 damping balls. The mounting holes are 30x30mm apart. Ensure the damping balls are correctly installed to reduce vibrations.
2. Orient the PDB according to your flight controller's requirements and the layout of your ESCs.

4.3 Wiring Connections

Always ensure all power is disconnected before making any wiring connections. Incorrect wiring can cause severe damage to components.

1. Battery Connection: Solder the provided XT90+ connector with 10AWG silicone wire to the large BAT (+) and (-) pads on the PDB. Ensure correct polarity.
2. Capacitor Installation: Solder the two 50V 2200μF capacitors to the designated pads near the battery input. Observe correct polarity (long lead is positive, short lead is negative). Capacitors help filter power and reduce voltage spikes.
3. ESC Connections: Solder the positive (+) and negative (-) leads from each of your six ESCs to the corresponding S1-S6 pads on the PDB. Double-check polarity for each ESC.
4. Flight Controller Connection: Connect the SH1.0-10P to 8P EP-106 FC to PDB Connection Cable between the PDB's E1-E8 connector and the appropriate port on your flight controller. This cable typically carries current sensor data and potentially other telemetry. Refer to your flight controller's manual for specific pinout details.
5. Signal Wires: Connect the signal wires from your ESCs to the appropriate motor output pins on your flight controller.

4.4 Initial Power-Up and Testing

1. Before connecting the main battery, perform a continuity check with a multimeter to ensure there are no short circuits between positive and negative terminals on the PDB or any connected components.
2. Connect a smoke stopper or current limiter to your battery before the first power-up to prevent damage in case of a short circuit.
3. Carefully connect your LiPo battery to the XT90+ connector.
4. Observe for any smoke, unusual smells, or excessive heat. If any occur, immediately disconnect power and re-check all connections.
5. Verify that your flight controller powers on and detects the current sensor (if applicable) in its configuration software.
6. Test motor direction and functionality in your flight controller software (e.g., Betaflight, ArduPilot) without propellers attached.

5. Operating the PDB

The PDB itself is a passive component that distributes power. Its operation is integrated with your flight controller and ESCs. Once properly installed and configured, it will provide stable power to all connected components. The on-board current meter, if supported and connected to your flight controller, will provide real-time current consumption data, which is vital for battery monitoring and flight efficiency.

6. Maintenance

The GEPRC HEX X PDB V1.0 is designed for durability, but proper maintenance can extend its lifespan and ensure continued performance:

• Regular Inspection: Periodically inspect the PDB for any signs of physical damage, loose solder joints, or corrosion.
• Cleaning: Keep the board clean and free from dust, dirt, and debris. Use a soft brush or compressed air. Avoid using liquids directly on the board.
• Connection Integrity: Ensure all soldered connections remain strong and secure. Re-solder any connections that appear weak or corroded.
• Environmental Protection: If operating in humid or dusty environments, consider applying a conformal coating to the PDB for added protection, ensuring not to cover any connectors or heat-dissipating components.

7. Troubleshooting

If you encounter issues with your PDB, consider the following troubleshooting steps:

7.1 No Power to Components

• Check Battery Connection: Ensure the LiPo battery is fully charged and correctly connected to the XT90+ connector on the PDB, observing polarity.
• Inspect Solder Joints: Verify all solder joints, especially the main battery input and ESC connections, are solid and free from cold joints or bridges.
• Continuity Check: Use a multimeter to check for continuity across the PDB's main power rails and to individual ESC pads. Also, check for any short circuits between positive and negative.
• Flight Controller Power: Confirm your flight controller is receiving power. If not, check the FC to PDB connection cable and any voltage regulators on the FC.

7.2 Intermittent Power or Brownouts

• Capacitor Check: Ensure the 50V 2200μF capacitors are correctly installed and not damaged. They are crucial for smoothing power delivery.
• Wire Gauge: Verify that the main battery wires and ESC wires are of adequate gauge for the current draw of your motors.
• Overcurrent: If experiencing frequent power cuts, your setup might be drawing more current than the PDB or battery can safely supply. Review your motor/propeller combination and battery C-rating.

7.3 Incorrect Current Readings

• FC to PDB Cable: Ensure the SH1.0-10P to 8P FC to PDB Connection Cable is securely connected and correctly wired to your flight controller's current sensor input.
• Flight Controller Configuration: Calibrate the current sensor in your flight controller's software. Refer to your flight controller's manual for calibration procedures.
• PDB Functionality: While rare, a faulty current sensor on the PDB could be the cause.

8. User Tips

• Use a Smoke Stopper: Always use a smoke stopper for the first power-up of any new build or after significant wiring changes. This can save your components from irreversible damage due to short circuits.
• Clean Solder Joints: Ensure all solder joints are clean, shiny, and have good flow. Poor solder joints are a common cause of power issues and can lead to intermittent failures.
• Cable Management: Route your power and signal wires neatly and securely to prevent them from interfering with propellers or other moving parts, and to minimize electrical noise.
• Vibration Isolation: Utilize the provided damping balls effectively to isolate the PDB and flight controller from motor vibrations, which can affect sensor performance and overall stability.

9. Warranty and Support

For warranty information, technical support, or further assistance, please contact the manufacturer, GEPRC, or your authorized reseller. Keep your proof of purchase for any warranty claims.