Futaba R304SB-E User Manual

1M23N28504

R304SB-E

T-FHSS-2.4GHz System
S.BUS2, 4-Channel
Built-in Antenna Receiver
for EP Car Models

WARNING

NEVER use dry batteries for

the power supply of the R304SB-E
as this may cause difficulties with
the receiver's operation.

NEVER use the R304SB-E in GP

(Engine) cars.

Wrap the receiver with

something soft,such as foam
rubber,to avoid vibration. Do not
splash water over the receiver.

Since the receiver generates a

certain amount of heat, install
the place with good ventilation.

Thank you for purchasing the
receiver. The
with the Futaba

The

R304SB-E

developed bidirectional communication
system "

R304SB-E

T-FHSS

receiver has adopted the newly

".

T-FHSS

is designed for use

system transmitter.

•Telemetry system

With the
status can be displayed at the transmitter.
The telemetry data can be checked at the
transmitter by connecting the
sold separately to the

R304SB-E

telemetry system

S.BUS2

receiver.

•Normal mode/High Speed mode

The "Normal mode" accepts any type of servos
or the peripheral. The "High Speed mode"
only accepts the digital servos, including BLS
series, and most peripheral equipments such
as the brushless ESCs. Please pay special
attention to the information contained within
this manual and transmitter's manual in order
to have a pleasant running experience.

•Built-in antenna

The

R304SB-E

receiver is designed to be

R304SB-E

, the running

telemetry sensor

connector of the

used only for EP Car models.

Note:

The R304SB-E is compatible with the T-FHSS system

transmitters.
The receiver type setting of the transmitter is set T-FHSS.

*Futaba T-FHSS system does not work with current Futaba S-FHSS/FHSS/FASST-

est/FASST system.

Link switchLED

CH output
(1 to 4) / (Battery)

S.BUS2 / (Battery)

Operating Precautions:

Once the

R304SB-E
T-FHSS normal mode
speed mode

locked as long as the power is ON.
When need to change the mode,
please cycle power.

, the detected mode is

detects the

or

T-FHSS high

Link Procedure

Each transmitter has an individually
assigned, unique ID code. In order to start
operation, the receiver must be linked
with the ID code of the transmitter with
which it is being paired. Once the link is
made, the ID code is stored in the receiver
and no further linking is necessary unless
the receiver is to be used with another
transmitter.

Place the transmitter and the

1

receiver close to each other within
half (0.5) meter.

Place the transmitter into the linking

2

mode, and turn on the receiver.

During countdown, push the receiver

3

tact switch for approximately 2
seconds. The LED will begin to blink
red. After the receiver LED switches
from blinking red to green→red
steady light, If the transmitter and
receiver are linked normally, set the
power switch to the OFF position
and then turn on the PWR ON
position. If the receiver LED lights
green, linking was succeeded.
Actually check servo operation.

WARNING

After the linking is done, please cycle receiver power and check if the receiver
to be linked is really under the control by the transmitter to be linked.

Do not perform the linking procedure with motor's main wire connected or
with the engine operating as it may result in serious injury.

Usage condition on "High Speed mode"

CAUTION

When using the high-speed mode, use a Futaba digital servo (including
brushless servo). Analog servos cannot be used.

• The use of analog servos may cause servo trouble.

* Please refer to the table below for

LED status and receiver condition.

No signal recep­tion

Receiving signals LED: Green

Unrecover­able failure
(EEPROM,etc.)

LED: Red

LED: Red
and Green
turn on alter­nately

* Refer to the transmitters operation

manual for complete details on how to
place the transmitter into the linking
mode.

* If there are many T-FHSS systems

turned on in close area, your receiver
might have difficult in establishing a
link to your transmitter. This is a rare
occurrence. Your receiver may link to
the undesirable transmitter. This is
very dangerous if you do not notice
this situation. In order to avoid the
problem,we strongly recommend
you double check whether your
receiver is really under control by your
transmitter.

1

The Example of Connection

CH2

CH1

S.BUS2

Receiver

Collect many telemetry
sensors by HUB and connect
them to S.BUS2 port.

Compliance Information Statement
(for U.S.A.)

This device, trade name Futaba Corporation, model number R304SB-E, complies with part15
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.
(3) This module meets the requirements for a mobile device that may be used at separation

distances of more than 20cm from human body.
To meet the RF exposure requirements of the FCC this device shall not be co-located with

another transmitting device.
The responsible party of this device compliance is:
Futaba Service Center
3002 N Apollo Drive Suite 1, Champaign, IL 61822 U.S.A.
TEL [phone] or E-mail: [e-mail] (Support)

ESC（Motor controller)

Steering servo

Temperature

RPM sensor

HUB

Voltage sensor

Telemetry sensors

(Option)

R304SB-E Specifications:

T-FHSS

(

system,

• Receiving on 2.4GHz band

• System:
At Normal/High speed mode (auto detection)

• Receiving Range : 70m (230ft.)(at the best conditions)

•

Power requirement Rated voltage: 4.8V-7.4V / Usable voltage: 3.5-8.4V

• F/S and Battery F/S function:It is set according to the transmitter used.

• Battery F/S voltage: Set it with the transmitter arbitrarily.

• Size: 1.38x0.91x0.33” (35.1x23.2x12.5mm)

• Weight: 0.23oz. (6.7g)

S.BUS2

, 4-channel receiver)

T-FHSS

system

1080 Yabutsuka, Chosei-mura, Chosei-gun, Chiba-ken, 299-4395, Japan

Phone: [phone], Facsimile: [phone]

FUTABA CORPORATION

©FUTABA CORPORATION 2013, 9 (1)

sensor

2