Futaba FDLS-1 Dual RX Link System

Product Overview

Thank you for purchasing the Futaba FDLS-1. This manual provides instructions for proper and safe use of the FDLS-1. Please read it thoroughly and store it in a safe place.

The FDLS-1 is a communication switching device designed for dual receiver systems in RC (Radio Control) aircraft. It ensures a secure system by automatically switching to a sub-receiver if the main receiver experiences trouble, allowing the aircraft to fly safely.

Applicable Systems: S.BUS/S.BUS2 receivers (excluding car applications).

Specifications

• Use: Two receivers communication switching device
• Length: 240 mm (9.5 in)
• Weight: 6.5 g (0.2 oz)
• Operating voltage: DC3.7 V to 7.4 V (Acceptable: DC3.5 V to 8.4 V)

LED Indication

• Green 1 blink: Main Rx operation
• Green 2 blinks: Sub Rx operation
• Red: No signal reception
• Green/Red Alternate blink: Unrecoverable error

How to Use

1. Install two receivers on the aircraft as shown in the wiring diagram.
2. Link the two receivers using the dual receiver feature of your transmitter. If your system does not have dual receiver capability, link each receiver individually.

Transmitter Linking Procedure (FASSTest 18CH Select Dual Mode)

• Primary Receiver Link: Turn on the main receiver and perform the link procedure.
• Secondary Receiver Link: Turn on the sub receiver and perform the link procedure.

Telemetry System

• When using the dual receiver function: The telemetry function of the main receiver can be utilized.
• Sub-receiver telemetry function is not available.
• For systems other than the dual receiver function: Telemetry is not available.
• Set telemetry to INH (disabled) if not in use.

Precautions

⚠️ WARNING: Failure to follow these safety precautions may result in severe injury to yourself and others.

• To prevent short circuits, always observe the correct polarity of all connections.
• Ensure the unit is properly connected to the receiver. If a connector becomes disconnected during flight, the system will be inoperable.
• Mount the unit in an area protected from fuel, water, and vibration. Proper handling, as with any electronic component, is advised to prolong the unit's life and performance.
• Allow a slight slack in the unit cables and secure them appropriately to prevent damage from vibration during flight.
• Crucially, link both receivers with the transmitter. The system will not function without a successful link. If the link on one side is lost after startup, the other side will continue to operate normally.
• The FDLS-1 is designed for use with Futaba S.BUS / S.BUS2 systems.
• Power Supply: Do not supply receiver power from the ESC (Electronic Speed Controller). If using an ESC with a receiver power supply function, remove the red (+) wire from the ESC's 3-channel wiring to prevent power from being supplied by the ESC. Use a dedicated battery to power the receiver and servos.
• Mounting: Avoid mounting the FDLS-1 near magnetic bodies.
• Testing: To ensure the FDLS-1 operates as intended, conduct thorough testing. Do not fly until all inspections are complete.
• Pre-flight Check: Before flight, disconnect the main receiver's wiring from the FDLS-1 while it is operating normally. Then, check if the sub receiver alone can control the aircraft. Verify that the FDLS-1 switches correctly.
• Do not use the FDLS-1 with any device other than an R/C model.

Wiring Diagram Description

The wiring diagram illustrates the connection of the FDLS-1 to two receivers (Main Receiver and Sub Receiver), both connected via S.BUS/S.BUS2 ports. The FDLS-1 itself features two S.BUS/S.BUS2 ports.

Servos are typically connected through HUBs, which then connect to the receivers. The diagram also shows optional components such as the TB16PP 6 Terminal BOX and SBD series S.BUS decoder (configured for 3CH).

Various telemetry sensors and S.BUS2 gyros can be connected when using S.BUS2 systems.

Important Note: Do not connect servos, S.BUS2 sensors, or batteries directly to the receiver. Doing so may cause excessive current flow through the FDLS-1, leading to a malfunction.

Antennas should be arranged in four different directions for optimal signal reception.

Power Supply Warning: As a critical safety measure, do not supply receiver power from the ESC. If using an ESC with receiver power supply capability, it is essential to remove the red (+) wire from the ESC's 3-channel wiring to prevent unintended power delivery. Always use a dedicated battery for powering receivers and servos.

Futaba Corporation contact details are provided at the bottom of the document.