Futaba SBUS & SBUS2

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. With MICROBEAST ULTRA you can take advantage of bidirectional communication. Here you must connect the SBUS2 signal to one of the bidrectional ports: DI2 or SYS.

Signal Port Telemetry

SBUS DI1 -

SBUS2 DI1 -

SBUS2 SYS + only MB ULTRA

SBUS2 DI2 + only MB ULTRA

SBUS / SBUS2 (radio control only)

SBUS2 with 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.