1M23N35802

R7103SBFASSTest-2.4 GHz Bidirectional Communication System
S.BUS2 / S.BUS Port and Conventional System ReceiverThank you for purchasing a Futaba R7103SB FASSTest-2.4 GHz
compatible receiver. The R7103SB receiver features bi-directional
communication with a FASSTest Futaba transmitter using the S.BUS2port. Using the S.BUS2 port an impressive array of telemetry sensors
may be utilized. R7103SB has a merit which acquires the information
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also includes both standard PWM output ports and S.BUS output ports. 4ports of R7103SB can choose an output channel from the 11 modes.

If R7103SB does not use S.BUS/S.BUS2 system, it canperform only operation of 3 channels. However, if S.BUS/
S.BUS2 system is used, use of the maximum channel ofa transmitter can be performed. You have to use S.BUS/
S.BUS2 servo, in order to use S.BUS/S.BUS2 system.

Usage precaution

Antenna installation precaution

Applicable systems: Futaba FASSTest-2.4 GHz systemtransmitter• Analog servos cannot be used with the R7103SB in the FASSTest 12CH mode.

Do not cut or bundle the receiver antenna wire.

• The R7103SB receiver can only be used with FASSTest capable transmitters.

WARNING

Do not bend the coaxial cable. It causes damage.

Changes or modiﬁcation not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.

The antennas must be mounted in such a way to assure they are strain
relieved.

The R7103SB receiver should be protected from vibration by foam rubber,
Velcro or similar mounting methods. Protect from moisture.

Keep the antenna as far away from the motor, ESC and other noise sources
as you possibly can.

Keep away from conductive materials to avoid short circuits.

Be sure that the two antennas are placed at 90 degrees to each other.
Don't connect the servo or gyro which do not correspond to S.BUS2 port
S.BUS2.
• When the servo and gyro which do not correspond to S.BUS2 are connected to S.BUS2
port, there is a danger of falling by malfunction.

• The R7103SB has two antennas. In order to maximize signal reception and promote
safe modeling Futaba has adopted a diversity antenna system. This allows the receiver toobtain RF signals on both antennas and ﬂy problem-free.

Antenna installation for carbon fuselage
WARNING

Turn on the power in transmitter → receiver order. In addition, always checkthe operation of all the servos before ﬂight.

You must leave 30 mm at the tip of the antenna fully exposed. The exposed
antenna should be secured so that it cannot move around or back inside ofyour aircraft.

Do not insert or remove the servo connector while the receiver power isON.
•Since the S.BUS servo switches the operation mode automatically according to thetype of signal (S.BUS signal/PWM signal) from the receiver, if the connector is insertedor removed while the power is ON, an S.BUS connected servo will be erroneously
recognized and may stop.

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Please refer the table below for LED status vsreceiver's condition.
LED Indication
GreenRedOff

Solid

No signal reception

SolidOffReceiving signals

Alternate blink

Status+8%
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Antenna installation+8%

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Fix the sleeve to the model

Gently bend the coaxial
cable part.

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ModeA(Default）

Port
Port1S.BUS

56%6SHFLÀFDWLRQVFASSTest-2.4 GHz system/S.BUS2 and S.BUS port and conventional system receiver• Dual antenna diversity• Size: 0.89 x 1.47 x 0.37 in. (22.5 x 37.4 x 9.3 mm)• Weight: 0.29 oz. (8.3 g)• Power requirement: 3.7 V to 7.4 V (Voltage range: 3.5 V to 8.4 V)• Battery F/S Voltage: It sets up with a transmitter• Extra Voltage port (port 2) "EXT-VOL cable and CA-RVIN-700" of an option is used: 0 to 70 V DC
* Be sure that when using ESCs regulated output the capacity of the ESC must meet your usage condition.

Port2
CH23/B
CH3S.BUS2S.BUS2FASSTest
FASSTest is a bidirectional communication system between the R7103SB
receiver and FASSTest capable transmitters. Multiple optional telemetry sensors
may be connected to the S.BUS2 on the receiver and that data is in turn displayedon the transmitter.
*Please see your transmitters operation manual to conﬁgure transmitter to operatewith telemetry sensors.

S.BUS2＜ How to change R7103SB into "EXT-VOL Mode" ＞

S.BUS2 extends S.BUS and supports bidirectional communication. Sensors are connectedto the S.BUS2 port.

PortS.BUS
S.BUS2S.BUS Servo
S.BUS Gyro○× （*）

S.BUS2 Servo
S.BUS2 Gyro○○

Telemetry sensor
×○*Only S.BUS2 capable devices may be connected to the S.BUS2 port. Standard S.BUS
servos and gyros should not be connected to the S.BUS2 port.

Link to the transmitter
Easy Link ID allows FASSTest receivers to link to compatible transmitter without pressing
the link button on the receiver.
1 Bring the transmitter and the receiver close to each other, within 20 inches (halfmeter).
2 Turn on the transmitter. Place the transmitter into the receiver linking mode.

3 Turn on the receiver.
4 When the LED of the receiver changes from blinking red to solid green, linking

1 Turn on the receiver. LED lights up red. [Transmitter is always OFF]2 Press and hold the Mode/Link button for 5 seconds to 10 seconds.
*It becomes the mode which makes a mistake in exceeding 10 seconds. In that case, carry out power
supply OFF and redo.

3 The LED should now be early blinking green. Mode/Link button is released.
4 Each press of the Mode/Link button advances the receiver to the next mode.
5 When you reach the mode that you wish to operate in, press and hold the Mode/
Link button for more than 2 seconds.

6 When LED blinks in green with red, it is the completion of a mode change.
7 Please cycle the receiver power off and back on again after changing the EXTVOL Mode.

External voltage
measurement
OFFON

Mode
Servo Mode(Default）
EXT-VOL Mode

LED blink
Green 1 time
Green 2 times

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* Refer to the transmitters operation manual for complete details on how to place the transmitter into thelinking mode.
* If there are many FASSTest systems turned on in close proximity, your receiver might have difﬁculty
establishing a link to your transmitter. This is a rare occurrence. However, should another FASSTest
transmitter/receiver be linking at the same time, your receiver could link to the wrong transmitter. This isvery dangerous if you do not notice this situation. In order to avoid the problem,we strongly recommend
you to double check whether your receiver is really under control by your transmitter.
* If the System Type of the transmitter is changed, the receiver will need to be re-linked to the transmitter.

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* Link is required when a new model is made from a model selection.

WARNING%ODFNOLQH
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Do not perform the linking procedure while the motor's main wire connectedor the engine is operating as it may result in serious injury.

ZLWKH[WHUQDOSRZHULQSXWPXVWEHOHVVWKDQ93RZHU%DWWHU\RUDQRWKHUSRZHUVXSSO\IRUVHUYRVWhen the linking is complete, please cycle the receiver power and ensure
the receiver is properly linked to the transmitter.
Please power up your system in this order. Transmitter ﬁrst, followed by thereceiver.
If the R7103SB receiver was previously linked to another transmitter, makesure that transmitter is not operating while linking the receiver to the newtransmitter.

Channel Modes

3 The LED should now be blinking red with green.
4 Each press of the Mode/Link button advances the receiver to the next mode.
[Refer to CH Mode table shown below.]

5 When you reach the mode that you wish to operate in, press and hold the%UDQFK

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RU6HUYR*It connects with reference to the manual of CA-RVIN-700.
WARNING
Don't touch wiring.
* There is a danger of receiving an electric shock.

When not using EXT-VOL, "EXT-VOL Mode" is turned OFF.
Don't connect EXT-VOL CABLE other than port 2 of R7103SB.

When using the R7103SB Receiver with the GYA450,GYA451
The following table corresponds to the gyro's functions. A port can be used effectively.
The servo which a gyro controls is connected to a gyro.
* Please refer to the description of each gyro manual.

S.BUS Gyro Goup table

Mode/Link button for more than 2 seconds.

6 When LED blinks in green with red, it is the completion of a mode change.
7 Please cycle the receiver power off and back on again after changing theChannel Mode.

*5 seconds after the receiver ON, LED shows CH Mode.

R7103SB CH Mode table
Port1
A(Default） S.BUS
BS.BUS2
CS.BUSDE
CH1FGCH2HCH1I
CH2JCH4KCH11WR0RWRU
0RWRU&RQWUROOHU

Don't connect to Extra Voltage before turning on a receiver.

The R7103SB is capable of changing its channel allocations as described in the tablebelow. Please choose the mode which suited the use in the following procedure from the11 modes.
1 Press and hold down the Link/Mode button on the R7103SB receiver.
[Transmitter is always OFF]2 Turn the receiver on while holding down the Link/Mode button. After power up,the button can be released.

Mode)XVH

EXT-VOLPort
Port23/BS.BUS2
S.BUS2

CH2

CH4S.BUS
CH3CH5CH7CH8CH12S.BUS2LED blink
Red 1 timeRed 2 times
Red 3 times
Red 4 times
Green 1 time
Green 2 times
Green 3 times
Green 4 times
Red and Green 1 time
Red and Green 2 times
Red and Green 3 times

Gyro control CHRudder
Elevator
AileronElevator+Rudder
Aileron+Rudder
Aileron+Elevator
Aileron+Elevator+Rudder

CH ModeD,EFGH
IJK[ Example: Connecting GYA451 to R7103SB CH Mode G ]（GYA451 is used for the aileron of an airplane）

Port 2R7103SB

Measurement of Extra Voltag

CH4Rudder servo

Port 1

R7103SB can display the voltage of a receiver battery on a transmitter.
Furthermore, the following procedures are required in order to display the voltage ofanother battery (Drive battery etc.).
1 The optional adapter for CA-RVIN-700 is purchased.
2 R7103SB is changed into "EXT-VOL Mode" in the following procedure.

3 According to the manual of CA-RVIN-700, battery wiring is branched and it

3/BS.BUS2
Battery

connects.

HUB*If "EXT-VOL Mode" is used, the port 2 cannot be used as the servo CH.

CH2Elevator servo
CH1
Aileron servo

GYA451CH6
2nd Aileron servo
CH3Throttle servo

4 One side of EXT-VOL CABLE is connected to the port 2 of R7103SB.
FUTABA CORPORATION
oak kandakajicho 8F 3-4 Kandakajicho, Chiyoda-ku, Tokyo 101-0045, Japan
TEL: +81-3-4316-4820, FAX: +81-3-4316-4823©FUTABA CORPORATION

2019, 10(1)