Manuals:BXFbl:Radio Setup:Futaba SBUS/en

SBUS was one of the first serial data signal protocols. The receiver sends out control signals from the radio in data packets which the flybarless system can decode and use as control commands. This protocol is so popular that other manufacturers are using it as well, i.e. FRSKY receivers. So you don't need to have a Futaba radio system for using SBUS. Please note that the channel assignment of your radio can be different to the Futaba standard though. In this case you must teach a user defined channel assignment during in the BEASTX receiver menu later.

SBUS2 is the successor of SBUS. Basically it is the same protocol as SBUS but enhanced by bi-directional telemetry communication. With the BEASTX devices you can connect the SBUS2 port to the same port as SBUS. The system will accept this signal as well. Using MICROBEAST ULTRA you can take advantage of bi-directional communication. Here you must connect the SBUS2 signal to one of the bi-directional ports: DI2 or SYS.

Connection scheme

SBUS / SBUS2 connection options

Signal	Port	Telemetry
SBUS	DI1	no
SBUS2	DI1	no
SBUS2	SYS	yes (only MB ULTRA)
SBUS2	DI2	yes (only MB ULTRA)

SBUS / SBUS2 - control only

Using SBUS/SBUS2 to control your helicopter is possible with any of the BEASTX devices. Connect the SBUS/SBUS2 port of your receiver with the DI1 port of your BEASTX system using one of the provided standard servo wires.

(Picture MBPLUS)

(Picture Nanobeast)

The ESC or throttle servo is connected at CH5 / IO2 output on MICROBEAST PLUS / ULTRA. NANOBEAST uses the port CH1 for the throttle.

(Picture MBPLUS)

(Picture Nanobeast)

SBUS2 - control and telemetry

For bi-directional telemetry connect your SBUS2 signal wire either to the SYS port or to the DI2 port of your MICROBEAST ULTRA. In both cases it is mandatory to add a pull-down 4,7kOhm resistor between signal line and ground (minus). When using the DI2 port, also you need an adapter from standard servo connector to 5-pin JST as shown below.

(Picture Resistor)
(Picture SYS)

(Picture Resistor)
(Picture DI2)

The ESC or throttle servo is connected at IO1 port. If needed the telemetry data line from the ESC is connected to the IO2 port.

Radio setup

Telemetry....

BEASTX setup

In order to use your SBUS / SBUS2 receiver you have to scan the input type in the RECEIVER MENU of your BEASTX device and set the correct channel ordering for your radio system. By default the BEASTX system has a preset channel order that fits to most FUTABA radios. If needed you can change the channel ordering in RECEIVER MENU of the BEASTX system.

SBUS / SBUS2 default channel order

Channel	Function
CH1	Roll / Aileron
CH2	Pitch / Elevator
CH3	Throttle
CH4	Rudder
CH5	Gain
CH6	Thrust / Collective
CH7	AttitudeControl (optional)
CH8	Governor (optional)
CH9	Aux channel (optional)

(The optional functions are described in the section Optional features.)

MICROBEAST PLUS / MICROBEAST ULTRA

Push and hold the button on your MICROBEAST and power up the device. Menu LED A will flash instantly. Now release the button. Push again to start the scan process. When scan was successful, Menu LED B will show up. Now push and hold the button for 2 seconds and release in order to load the default channel assignments. If needed you can set up your telemetry devices at Menu LEDs L & M, if applicable; push button briefly to skip. Finally teach throttle failsafe position at Menu LED N by bringing the throttle in lowest position on your radio and push the button again. Now your MICROBEAST will start with init sequence. For further information about RECEIVER MENU setup, see next section. Then perform basic setup procedure in SETUP MENU.

NANOBEAST

Power up NANOBEAST. Then connect the push button to SYS port. Push and hold the button for 2 seconds, then release. The Status LED will change color or go off. Push the button again to start the scan process. When scan was successful, the Status LED will flash twice. Now push and hold the button for 2 seconds and release in order to load the default channel assignments. If needed you can set up your telemetry devices at Menus L & M, if applicable (Menu L = Status LED flashes long once and then 5 times, for Menu L 6 times); push button briefly to skip. Finally teach throttle failsafe position at Menu N (Status LED flashes long once and then 7 times) by bringing the throttle in lowest position on your radio and push the button again. Now your NANOBEAST will start with init sequence. For further information about RECEIVER MENU setup, see next section. Then perform basic setup procedure in SETUP MENU.

Setup with StudioX

You can also use the StudioX app to start receiver scan and perform further setup steps. In this case open the Control menu in StudioX and click the SCAN button in this menu's screen. For further informations please refer to the StudioX instruction notes. Please note that when the SBUS2 receiver is connected to SYS port on MICROBEAST ULTRA, you must connect the BLE2SYS / USB2SYS adapter at the DI2 port using the optional adapter from standard servo connector to 5-pin JST.


(Picture sys adapter!)