Futaba R3204SB T-FHSS Air Receiver 1S LiPo

Small four-channel Futaba T-FHSS Air-2.4GHz transmission system telemetry receiver with a pair of full-range diversity antennas. It is intended for use in models of all categories; thanks to its compact dimensions, low weight, connectors inserted in the longitudinal axis and the possibility to work with power supply from 1S LiPo (3.7 V), it is also suitable for very small and light models. The R3204SB provides 4 classic PWM channel outputs and a S.BUS2 port for bidirectional communication enabling the connection of S.BUS2 servos and telemetry sensors. It supports "Model ID" function. The operational states of the receiver are signaled by an LED indicator.

Transmission system

Futaba T-FHSS Air-2.4GHz for flying models. Not compatible with the T-FHSS Surface 2.4GHz transmission system used by Futaba RC kits for RC cars, other ground vehicles and boats.

Power supply

3.7-7.4 V (nominal voltage), operating 3.5-8.4 V – i.e. e.g. 4-6 NiMH batteries, 1-2S LiPo/Li-ion, 2S LiFe batteries, BEC power stabilizers in a given voltage range.

Antenna

The receiver is equipped with a pair of diversity antennas in order to maximize signal reception regardless of the relative position of the model and the transmitter. These must be fixed in the model with a mutual orientation of 90°.

Receiver outputs

The receiver allows the connection of standard Futaba connectors (with a protrusion) and UNI connectors (=JR/Graupner, Hitec) without a side protrusion.

• Channel outputs (PWM): R3204SB offers 4 classic PWM channel outputs that can be used simultaneously with the S.BUS2 serial bus.
• S.BUS2: The S.BUS2 socket enables the connection of S.BUS2 servos, gyroscopes and other compatible devices and the connection of Futaba telemetry sensors, the data of which can be displayed on the transmitter.

Telemetry

• The R3204SB transmits data about the receiver's supply voltage to the transmitter without the need to connect any sensors.
• The R3204SB allows the use of all Futaba telemetry sensors and other sensors compatible with the bidirectional S.BUS2 bus system.

The receiver set includes: R3204SB receiver, user manual.

What is S.BUS2/S.BUS

• S.BUS – Futaba serial bus with one-way communication enabling the control of servos, controllers, switches, gyroscopes and other compatible RC devices connected to a single output port of the S.BUS receiver.
• S.BUS2 - Futaba serial bus for two-way communication allowing (like S.BUS) control of servos, controllers, switches, gyroscopes and other compatible RC devices connected to a single S.BUS2 input/output port of the receiver. In addition, it allows you to connect telemetry sensors and transmit data from them through the receiver for display on the transmitter; from some S.BUS2 servos can transmit information about the operating current, temperature or angle of the servo output lever to the transmitter.

Unlike classic RC kits, the S.BUS(2) system uses serial data communication to transmit control signals from the receiver to a servo, gyro or other device. This data contains commands like "move channel 3 servo to 15 degrees, move channel 5 servo to 30 degrees" for multiple devices. S.BUS(2) devices only execute commands belonging to their own set channel. For this reason, it is possible to connect several servos to the same signal cable, while setting and controlling them individually as needed. The servo identification code (ID) is used for this. You can find the ID on the sticker on the servo box.

The S.BUS2 servo can be connected to the S.BUS2 and S.BUS ports of the receiver. Its function is determined by setting the channel in the servo memory (it is performed using the programming interface of the Futaba transmitter, the SBC-1 programmer or the CIU-3 USB interface with the S-Link PC program - for some servos, the channel can only be set with the help of the transmitter).

An S.BUS or S.BUS2 servo connected to the channel output of a classic receiver (PWM) works like a classic servo. Its movement is given by the signal in the channel of the receiver to which it is connected. The settings of the programmable servo functions remain in effect.