Futaba R7301SB FASSTest Receiver

Introduction

Thank you for purchasing a Futaba R7301SB FASSTest-2.4GHz compatible receiver. The R7301SB receiver features bi-directional communication with a FASSTest Futaba transmitter using the S.BUS2 port. This allows for an impressive array of telemetry sensors to be utilized. It also includes standard PWM output ports (CH3). The R7301SB can also be switched to the Dual Rx Link System, which ensures safety by mounting two FASSTest receivers on one aircraft.

Key Features

• FASSTest-2.4GHz Bidirectional Communication System
• Dual Rx Link System
• S.BUS2 / RX Port and 1 Channel (CH3) for Conventional System Receiver
• Dual antenna diversity

FASSTest12CH Telemetry OFF Mode Setup

This mode is used for forcibly turning off telemetry transmission to prevent collision of telemetry signals from the receiver to the transmitter when using dual RX link mode in FASSTest12ch mode.

1. Turn on the receiver. [Transmitter is always OFF]
2. Press and hold the SW for 5 seconds or more. Blinking switches every 5 seconds: RED ORANGE → GREEN ORANGE slow blink.
3. Release the switch when it blinks ORANGE once.
4. Press switch once more to return to flashing ORANGE once.
5. Press and hold the SW. Blinks ORANGE twice.
6. Release SW. Solid ORANGE.
7. Turn off the receiver power.

Status after restart: LINK LED lights up solid ORANGE.

How to Dual RX Link

Install two receivers on the aircraft. Link the two receivers using the dual receiver feature of the transmitter. If your system does not have dual receiver capability, link each receiver in turn.

Transmitter in link mode: For FASSTest 18CH, select dual mode and link primary/secondary receivers.

Linking Procedure:

1. Turn on the main receiver and link.
2. Turn on the sub receiver and link.

Note: When using the dual receiver function, the telemetry function of the main receiver can be used. The sub-receiver telemetry function is not available.

Telemetry for FASSTest12CH

In FASSTest12CH mode, after linking R7301SB in telemetry OFF mode, link the receiver you want telemetry to. The transmitter will show the telemetry of the last linked transmitter.

• #1 First Link: R7301SB (Telemetry OFF mode → ACT)
• #2 Second Link: R7301SB (Telemetry)

Status: #2 Telemetry display of second-linked receiver. (#1 Telemetry OFF first-linked receiver.)

Channel Modes

The R7301SB is capable of changing its channel allocations. This is especially important when using the receiver in a dual receiver mode. Refer to your transmitter's operation manual for complete details on operating in the dual receiver mode.

R7301SB CH Mode Table:

Changing Channel Mode:

1. Turn on the receiver. [Transmitter is always OFF]
2. Press and hold the SW for 5 to 10 seconds.
3. When the LED changes from blinking red to blinking orange, release the SW.
4. The LED will blink red two times in the patterns described in the chart.
5. Each press of the SW advances the receiver to the next mode.
6. When you reach the desired mode, press and hold the SW for more than 2 seconds. When the LED blinks orange, mode change is complete, release SW.
7. Cycle the receiver power off and back on again after changing the Channel mode.

Status: The LED will flash for the current CH output mode.

Dual RX Link System

By installing two receivers in one aircraft, if one receiver becomes unable to communicate, the other receiver can still be operated.

How to change to Dual RX Link mode:

1. Turn on the receiver. [Transmitter is always OFF]
2. Press and hold the SW for 5 seconds or more.
3. Release the switch when it blinks GREEN once.
4. Press switch. Blinks GREEN twice.
5. Press and hold the SW. Blinks ORANGE.
6. Release SW. Solid ORANGE.
7. Turn off the receiver power.

Status after restart: MODE LED lights up.

Connection Example:

MAIN Receiver: R7301SB (Use dual RX link mode of R7301SB). *PWM3CH cannot be used.

SUB Receiver: R7301SB (Use dual RX link mode of R7206SB). *Do not turn on the dual RX link mode of the R7301SB.

In Dual RX link mode, the S.BUS2/RX port is for reception only, so use separate ports for S.BUS output and S.BUS2 input/output.

Usage Precautions

• Analog servos cannot be used with the R7301SB in the FASSTest 12CH mode.
• Analog servos move slightly at startup in the FASSTest 26CH/18CH mode.
• The R7301SB receiver should be protected from vibration by foam rubber, Velcro, or similar mounting methods. Protect from moisture.
• Keep away from conductive materials to avoid short circuits.

Antenna Installation Precaution

• Do not cut or bundle the receiver antenna wire.
• The antennas must be mounted in such a way to assure they are strain relieved.
• Keep the antenna as far away from the motor, ESC and other noise sources as you possibly can.
• Do not touch the antenna to metal, carbon, or other conductive material.
• Be sure that the two antennas are placed at 90 degrees to each other.
• For carbon fuselage, leave 30mm at the tip of the antenna fully exposed. The exposed antenna should be secured so that it cannot move around or back inside of your aircraft.

Link Precaution

• Do not perform the linking procedure while the motor's main power is connected or the engine is operating as it may result in serious injury.
• When the linking is complete, please cycle the receiver power and ensure the receiver is properly linked to the transmitter.
• Power on the system in this order: Transmitter first, followed by the receiver.
• If the R7301SB receiver was previously linked to another transmitter, make sure that transmitter is not operating while linking the receiver to the new transmitter.

Connector Insertion Caution

• Don't connect an S.BUS servo / gyro to S.BUS2 connector.
• Do not mistake the insertion position/direction of the connector. If make a mistake as shown in the diagram, there is a risk of fire, burnout, or burns.

Specifications

• System: FASSTest-2.4 GHz (36CH/18CH/12CH mode)
• Ports: S.BUS2 and S.BUS port and 1 Channel for conventional system receiver
• Antenna: Dual antenna diversity
• Size: 0.85 x 1.56 x 0.26 in. (21.5 x 39.5 x 6.5 mm)
• Weight: 0.21 oz. (6.0 g)
• Power requirement: 3.7 V to 7.4 V (Voltage range: 3.5 V to 8.4 V)
• Battery F/S Voltage: Set up with a transmitter

Compliance Information

• FCC Compliance (U.S.A.): This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
• IC Compliance (Canada): This device complies with Industry Canada license-exempt RSS standard(s).
• EU Declaration of Conformity: Futaba Corporation declares that the radio equipment type R7301SB is in compliance with Directive 2014/53/EU. Full text available at: https://www.rc.futaba.co.jp/support/manual/

Diagram Descriptions

Diagram 1: Shows the setup for FASSTest12CH Telemetry OFF mode, illustrating the sequence of pressing and holding the SW button on the receiver.

Diagram 2: Illustrates the Dual RX Link setup, showing two receivers (MAIN and SUB) connected to the aircraft's system, with arrows indicating communication flow.

Diagram 3: Depicts the antenna installation, showing the correct placement of the antenna at a 90-degree angle to the coaxial cable and the need for strain relief.

Diagram 4: Shows a typical installation of the R7301SB receiver with connections to ESC, Antenna, HUB, and Telemetry sensors.

Diagram 5: Illustrates the correct and incorrect connector insertion for S.BUS2 and S.BUS ports, highlighting the risk of damage from incorrect insertion.