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Futaba's 14-channel FASSTest-2.4GHz transmission system telemetry receiver with a pair of full-band Diversity antennas. It is designed for general purpose use in models of all categories. Thanks to selectable channel modes and the ability to operate with two receivers, it will also be perfect for models requiring a large number of channels, in which case the R7214SB pair will provide up to 26 classic PWM channel outputs or 24 PWM outputs and 2+ 2 S.BUS and S.BUS2 serial ports for bi-directional communication allowing connection of S.BUS2 servos, telemetry sensors and other compatible devices. The receiver's operating states are indicated by an LED.
Transmission system:
Futaba FASSTest-2.4 GHz with telemetry for flying models, FASSTest 26CH/18CH/12CH modes
Note that only digital servos can be used in the FASSTest 12CH high repetition rate mode.
Power supply:
3.7-7.4 V (nominal voltage), the operating voltage range is 3.5-8.4 V - that is, for example, 4-6 NiMH, 1-2S LiPo, 2S LiFe and Li-ion batteries, BEC power stabilizers within the voltage range.
Antenna:
The receiver is equipped with a pair of differential antennas to maximize signal reception regardless of the relative position of the model and transmitter. They should be mounted on the model with a mutual orientation of 90°. The antennas are equipped with housings to improve the directional characteristics of the antennas.
Receiver outputs, channel modes:
The receiver is equipped with sockets for standard Futaba connectors (with a protrusion), into which, of course, UNI connectors (JR/Graupner, Hitec) without a side protrusion can also be inserted (be careful not to confuse the polarity).
Channel outputs (PWM/S.BUS): The R7214SB allows you to reassign channels according to the table in the manual, allowing you to use a combination of classic PWM outputs and S.BUS outputs or dual receiver operation (requires a Futaba transmitter that allows dual receiver operation), in which a pair of R7214SBs can offer up to 26 classic PWM channels or 24 PWM outputs and 2+2 S.BUS/S.BUS2 serial outputs, or other combinations with additional S.BUS2 input/output ports and switchable DG1/DG2 channels. Channel modes are selected using a button on the receiver in a special setup mode - channel modes cannot be changed in normal operation.
S.BUS2: The S.BUS2 socket allows the connection of servos, gyros and other compatible S.BUS2 devices, as well as the connection of Futaba telemetry sensors whose data can be displayed on the transmitter.
EXT (Extra Voltage): Socket for measuring the voltage of an external battery (e.g., drive) connected via CA-RVIN-700 cable (sold separately) in the range of 0-70 V.
Operation with two receivers with automatic backup:
It is also possible to enable two-receiver operation with automatic backup on the receiver, which will automatically provide a switchover from the main receiver to the backup receiver (or vice versa) in the event of a signal loss of one of the receivers (a pair of R7214SBs or one R7214SB and a second FASSTest S.BUS2 receiver). The function is basically the same as the FDLS-1 backup system, but it can be done without additional equipment.
Telemetry (FASSTest only):
The R7214SB transmits data about the receiver's supply voltage and the voltage measured at the EXT input to the transmitter without connecting any sensors.
The R7214SB allows the use of all Futaba telemetry sensors and other sensors compatible with the S.BUS2 bus system with bidirectional communication.
What is S.BUS2/S.BUS:
S.BUS - Futaba's serial bus with unidirectional communication that allows control of servos, controllers, switches, gyroscopes and other compatible RC devices connected to a single output port of the S.BUS receiver.
S.BUS2 - Futaba's serial bus for bidirectional communication allowing (like S.BUS) control of servos, controllers, switches, gyroscopes and other compatible RC devices connected to a single output/input port of the S.BUS2 receiver. In addition, it allows you to connect telemetry sensors and send data from them through the receiver for display on the transmitter; from some servos, the S.BUS2 can send information about operating current, temperature or servo output lever angle to the transmitter.
Unlike classic RC kits, the S.BUS(2) system uses serial data communication to send control signals from the receiver to the servo, gyro or other device. This data includes commands such as "move channel 3 servo by 15 degrees, move channel 5 servo by 30 degrees" for many devices. S.BUS(2) devices only execute commands belonging to their own set channel. For this reason, it is possible to connect several servos to the same signal cable, setting and controlling them individually as needed. The servo's identification code (ID) is used for this purpose. You can find the ID on a sticker on the servo box.
The S.BUS2 servo can be connected to the receiver's S.BUS2 and S.BUS ports. Its function is determined by setting the channel in the servo's memory (this is done using the programming interface of the Futaba transmitter, the SBC-1 programmer or the CIU-3 USB interface with the S-Link PC program - for some servos, the channel can only be set using the transmitter).
An S.BUS or S.BUS2 servo connected to the channel output of a classic receiver (PWM) works like a classic servo. Its movement is indicated by a signal in the channel of the receiver to which it is connected. The settings of programmable servo functions remain in effect.
Technical specifications:
- modulation: FASSTest - 2.4 GHz
- power supply (rated voltage): 4.8 V, 6 V, 7.2 V, 7.4 V, 3.7 V, 6.6 V
- power supply (operating range): 3,5 - 8,4 V
- number of channels: 14
- output: S-BUS, S-BUS2
- dimensions: 37 x 50.2 x 15.9 mm
- weight: 19 g
*Follow the instruction manual included with the product.