PowerBox PowerBus to Bus Adapter 9210PowerBox PowerBus to Bus Adapter 9210 The PowerBus to BUS Adapter is designed for use with servos which are fitted with an integral bus decoder. At present these are Futaba S Bus servos. When these servos are used, the channel assignment is programmed directly at the servo. The PowerBus to Bus Adapter does not feature a decoder, but nevertheless all the outputs are protected against short circuits both in the signal wire and the power supply wires, as