Futaba S-U305 (8.9kg 0.18s/60°)

Heavy duty programmable digital standard S.BUS2/S.BUS servo with metal gears and output shaft mounted on two ball bearings for general purpose with standard supply voltage. Ideal for aircraft models of all kinds (up to the size for approx. 15-20 cc internal combustion engine), cars and boats.

You can connect the S-U305 to the S.BUS 2 (serial bus with two-way communication) or S.BUS (serial bus with one-way communication) outputs of the receivers, or it can work as a classic servo connected to the channel (PWM) output of the receiver.

With the help of the CIU-3 USB interface and the S-Link PC program or a Futaba transmitter equipped with the S.BUS servo setting function, you can program a whole range of servo parameters (speed, deviation size, neutral, overload protection, soft start, etc.).

Standard supply voltage 4.8-6.0 V (nominal).

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 (as S.BUS) control of servos, controllers, switches, gyroscopes and other compatible RC devices connected to a single output/input port of the S.BUS2 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).

A 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.