Futaba R7301SB Receiver User Manual

R7301SB Receiver

1M23N36214
R7301SB

◆ FASSTest-2.4GHz Bidirectional Communication System
◆ Dual Rx Link System Equipment
◆ S.BUS2 / RX Port and 1 Channel (CH3) for Conventional System Receiver
● Applicable systems: Futaba FASSTest-2.4GHz system transmitter

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. Using the S.BUS2 port an impressive array of telemetry sensors may be utilized. It also includes both standard PWM output ports (ch3). The R7301SB can also be switched to the Dual Rx Link System. This system can ensure safety by mounting two FASSTest receivers on one aircraft.

Usage precaution

• 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.

WARNING
Changes or modification not approved by the party responsible for compliance could void the user’s authority to operate the equipment.
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.
The R7301SB has two antennas. In order to maximize signal reception and promote safe modeling Futaba has adopted a diversity antenna system. This allows the receiver to obtain RF signals on both antennas and fly problem- free.
Antenna installation for carbon fuselage
You must 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.
Be careful of connector insertion
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 below, there is a risk of fire, burnout, or burns. (Typical installation)

Be sure that when using ESCs regulated output the capacity of the ESC must meet your usage condition.
Never use dry batteries for the power supply of the R7301SB as they may cause difficulties.

R7301SB Specifications
FASSTest-2.4 GHz system (36CH/18CH/12CH mode)
S.BUS2 and S.BUS port and 1 Channel for conventional system receiver

• 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: It sets up with a transmitter

LED Indication

later → Red Blink（3 second）
Unrecoverable error (EEPROM, etc.)| Red Green
Alternate blink

In Dual RX Link Mode

External receiver is receiving error or not connected. S.BUS signal not received| Red Solid
S.BUS signal reception from external receiver (also received by external receiver)| Green Solid

In FASSTest12CH Telemetry OFF Mode

Link

FASSTest is a bidirectional communication system between the R7301SB 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 displayed on the transmitter.
Link to the transmitter

1. Bring the transmitter and the receiver close to each other, within 20 inches (half meter).
2.  Turn on the transmitter. Place the transmitter into the receiver linking mode.
3. Turn on the receiver.
4. The receiver will wait for the linking process to begin for 2 seconds. Following that it will return to the normal operation mode.
5. When the LED of the receiver changes from blinking red to solid green, linking is complete.
   (A link waiting state is ended in 3 second.)

• Refer to the transmitter’s operation manual for complete details on how to place the transmitter into the linking 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 is very dangerous if not noticed.
• To avoid the problem, we strongly recommend that you 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.

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

Compliance Information Statement (for Canada)
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. This equipment complies with IC radiation exposure limits set forth for an uncontrolled environment. This  equipmentshould be installed and operated with minimum distance 20cm between the radiator & your body. Channel Modes
The R7301SB is capable of changing its channel allocations as described in the table below. This is especially important when using the receiver in a dual receiver mode. See your transmitter operation manual for complete details on operating in the dual receiver mode.
R7301SB CH Mode table

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

| LINK LED
---|---
1 Turn on the receiver. [Transmitter is always OFF]| Red Solid
2 Receiver enters link waiting state| Start → 2second
later → Red Blink（3 second）
3 The LED will flash for the current CH output mode.| Current CH mode display

Declaration of Conformity (for EU)
Hereby, Futaba Corporation declares that the radio equipment type is R7301SB in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address:
https://www.rc.futaba.co.jp/support/manual/

Dual Rx Link System

By installing two receivers in one aircraft, if one receiver becomes unable to communicate, the other receiver can be operated.
Communicate with two receiversEven if there is a problem with the B receiver, communication will be performed with the A receiver.Even if there is a problem with the A receiver, communication will be performed with the B receiver.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.

Connection example

Example of main R7301SB : Use dual RX link mode of R7301SB. *PWM3CH cannot be used.
Receiver with Dual RX Link Mode Capability EX;R7206SB![Futaba R7301SB Receiver

• Connection example 1](https://manuals.plus/wp-content/uploads/2024/01 /Futaba-R7301SB-Receiver-Connection-example-1.png) Example of sub R7301SB : Use dual RX link mode of R7206SB.
  *Do not turn on the dual RX link mode of the R7301SB

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. After restarting, the MODE LED lights up.

External receiver is receiving error or not connected. S.BUS signal not received| Red Solid
S.BUS signal reception from external receiver (also received by external receiver)| Green Solid

FASSTest12CH(Telemetry OFF）mode

This mode is 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.
Change to this mode when using FASSTest12CH in dual RX link mode.

After restarting, the MODE LED lights up. In FASSTest12CH Telemetry OFF Mode

How to Dual Rx Link

1. Install two receivers on the aircraft as shown in the connection example.
2. Link the two receivers using the dual receiver feature of the transmitter.

For systems without dual receiver capability, link each receiver in turn.
Transmitter in link mode
For FASSTest 18CH Select dual mode and link primary
*Follow the link procedure for each receiver manual. Transmitter in link mode
For FASSTest 18CH Select dual mode and link secondary![Futaba R7301SB Receiver

• assembly 3](https://manuals.plus/wp-content/uploads/2024/01/Futaba-R7301SB- Receiver-assembly-3.png) ◆ About telemetry system
  When using the dual receiver function

  • The telemetry function of the main receiver can be used
  • 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.)

＃2 Telemetry display of second-linked receiver.
(＃1 Telemetry OFF first-Linked receiver.)
Compliance Information Statement (for U.S.A.)
This device, t rade name Futaba Corporation, model number R7301SB, complies with par t15 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.

CAUTION: To assure continued FCC compliance

1. Any changes or modifications not expressly approved by the grantee of this device could void the users authority to operate the equipment.
2. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment.

This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.
The responsible party of this device compliance is:
FUTABA Corporation of America 2681 Wall Triana Hwy Huntsville, AL 35824, U.S.A.
Phone:1-256-461-9399 FAX:1-256-461-1059 E-mail: ser vice@fut abaUSA.com

FUTABA CORPORATION
Hobby Radio Control Business Center Sales & Marketing Department
1080 Yabutsuka, Chosei-mura, Chosei-gun, Chiba-ken, 299-4395, Japan
TEL: +81-475-32-6051, FAX: +81-475-32-2915
©FUTABA CORPORATION 2023, 9 (1)

References

• サポート 取扱説明書ダウンロード | 双葉電子工業株式会社 ラジオコントロール

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