FUTABA 16SZ Instruction Manual page 37

When using the S.BUS2 port, an impressive array of telemetry sensors may be utilized.
Receiver port
S.BUS
S.BUS2
（※）Don't connect S.BUS Servo, S.BUS
S.BUS servos and gyros and S.BUS2 servos and gyros must be used in the
correct receiver ports. Please refer to the instruction manual to make sure
you connect to the correct one.
＜ Before Use ＞
38
S.BUS2 TABLE
S.BUS Servo
S.BUS Gyro
○
× （※）
Gyro to S.BUS2 connector.
S.BUS2
Servo
Telemetry sensor
S.BUS2 Gyro
○
○
×
○