The AeroLink RFD Adapter Board is a quick and simple way to install a RFDesigns modem into your chosen vehicle or application. This simple product allows you to connect to the modem with a standard JST-GH cable whilst also allowing for an external power supply to be used to power the modem, as is recommended by industry professionals.
To make the reading of this manual easier, we have included a number of different coloured callouts to highlight key information, safety warnings, tips and tricks.
You can download and print a copy of this guide by clicking the download PDF icon at the top of the page.
Most countries have regulations in place that govern the use of different radio frequencies. It is up to the user to ensure that they are operating within their local restriction.
For more information regarding the use of radio equipment in your area, please contact your local authorities.
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The AeroLink RFD Adapter Board is a modem mount that provides seamless integration between the RFD900 modem series and your vehicle. Eliminating the need to carry specialist items (such as FTDI cables), the Adapter Board can connect COMs (serial link) and power via a standard JST-GH cable, or power can be supplied through an external source (recommended).
The AeroLink RFD Adapter Board is compatible with the RFD900+, RFD900x and RFD900u modems. While the RFD900u modem requires soldering, the RFD900+ and RFD900x modems can be quickly and easily changed or replaced when needed.
This product is suitable for all UAV and UGV applications where a wireless serial link is required. Ideal for users of all experience levels.
1x RFD Adapter Board
1x 15cm 6 Pin JST-GH Cable
2x 3 Pin Right Angle Header Pins
3x M3x6 Mounting Screw
1x M3x10 Modem Retaining Screw
The AeroLink RFD Adapter Board can be configured to power the modem via an external/separate power source, or an internal source (the same source as your flight controller).
You will need to configure the Adapter Board before installing your modem.
The modems should not exceed 5V regardless of how your system is configured.
Selecting between different power sources is done via the jumper pads on the rear of the AeroLink RFD Adapter Board.
By default the AeroLink RFD Adapter Board is designed for use with an external power supply. It is manufactured with the jumper for External Power already closed by an internal trace.
To connect an external power supply, solder the provided right angle header pins or your wires directly to the power ports.
The JST-GH connector is used for your serial link.
Closing the jumper between the center pad and the right hand pad will allow the system to draw power through the JST-GH cable (refer to Power Supply Diagram). This often means drawing from the same power lines as the connected flight controller or other sensitive electronics. This is not advised, but may be required for some applications, such as:
The PPM connector allows the RFD900x modem to be used as a range extender for RC signals to the vehicle. The connector should join to the RC IN port on the vehicle.
The modems had a temperamental power system that can have random spikes and fluctuations. This has the potential to glitch the flight controller, or damage the BEC/regulator that is supplying the flight controller. Unless your system has other power redundancies in place we recommend drawing power to your modems from an external source.