FrSky Archer Plus R8 ACCESS / ACCST D16 Receiver
The FrSky Archer Plus R8 is a full-range 8-channel receiver designed for larger sport aircraft, scale models, gliders, electric aircraft, and other fixed-wing builds that require additional PWM outputs, reliable telemetry, and flexible receiver integration. With eight high-precision PWM channels, dual detachable antennas, and support for signal redundancy, the R8 provides a dependable control solution for more complex aircraft installations.
The Archer Plus R8 supports both ACCESS and ACCST D16 protocols, providing broad compatibility across FrSky 2.4GHz radio systems. The Archer Plus Series features enhanced anti-RF interference performance and smart protocol matching during binding, helping provide a stable and dependable connection. A built-in Black Box function can also preserve basic receiver power and signal-related flight data.
The R8 includes eight high-precision PWM channel outputs, SBUS Out with 16-channel or 24-channel support, and SBUS In for compatible receiver redundancy setups. The receiver can serve as the primary receiver in a redundant installation by connecting its SBUS In port to a compatible secondary FrSky receiver equipped with SBUS Out.
The receiver supports full-range telemetry through S.Port or FBUS. When configured for FBUS operation, compatible FrSky telemetry sensors, XACT servos, ADV sensors, and other supported devices can share simplified signal and telemetry wiring for a cleaner aircraft installation. The R8 also supports external battery or device voltage monitoring through AIN2 and Over-The-Air firmware updates with compatible ACCESS systems.
Compatibility Note
The Archer Plus R8 is compatible with and can bind to all FrSky ECOS, TWIN, and Tandem Series radios that support ACCESS or ACCST D16 protocols. This includes compatible transmitters and RF modules operating in either supported protocol mode.
Some advanced functions, including OTA firmware updates, FBUS device configuration, telemetry setup, and Black Box data access, require a compatible ACCESS and ETHOS system.
The Archer Plus R8 is not a TWIN TW receiver, Tandem TD receiver, ELRS receiver, Spektrum receiver, Futaba receiver, or FlySky receiver. Use this receiver only with compatible FrSky ACCESS or ACCST D16 radio systems.
Key Features
Full-range 8-channel FrSky receiver
Supports ACCESS and ACCST D16 protocols
Compatible with all FrSky ECOS, TWIN, and Tandem Series radios that support ACCESS or ACCST D16
Smart protocol matching during binding
Enhanced anti-RF interference performance
Built-in Black Box flight-data function
8 high-precision PWM channel outputs
SBUS Out with 16-channel or 24-channel support
SBUS In for compatible receiver redundancy setups
Can serve as the primary receiver in a redundant installation
Full-range S.Port and FBUS telemetry support
Up to 24 signal channels in supported configurations
Compatible with supported XACT servos, ADV sensors, and other FBUS devices
External battery or device voltage monitoring through AIN2
Over-The-Air OTA firmware update support
Dual detachable antennas with IPEX4 connectors
Suitable for sport aircraft, scale models, gliders, and larger fixed-wing builds
Brand: FrSky
• Model: Archer Plus R8
• Receiver Series: Archer Plus Series
• RF Protocol: ACCESS / ACCST D16
• Frequency: 2.4GHz
• PWM Channels: 8
• Maximum Signal Channels: 8 PWM with 16-channel or 24-channel SBUS modes
• Operating Voltage: 3.5–10V
• Operating Current: Less than 65mA at 5V
• Operating Range: Greater than 2km under ideal conditions
• Telemetry: S.Port / FBUS
• Signal Outputs: PWM / SBUS Out / FBUS
• Redundancy Input: SBUS In
• Black Box Function: Supported
• External Voltage Detection: AIN2
• AIN2 Measurement Range: 0–35V
• Voltage Divider Ratio: 1:10
• Antennas: Dual detachable 2.4GHz antennas
• Antenna Connectors: IPEX4
• Firmware Updates: Over-The-Air OTA with compatible ACCESS systems
• Dimensions: 54 × 20 × 10mm
• Weight: 9.8g
• Compatibility: FrSky 2.4GHz ACCESS or ACCST D16 capable transmitters and RF modules
Actual operating range may vary depending on antenna installation, transmitter output, aircraft construction, terrain, local RF conditions, and environmental conditions.
Select the Correct RF Protocol
Create or open the aircraft model on your FrSky transmitter and select either ACCESS or ACCST D16 to match the receiver firmware and intended operating mode. ACCESS is recommended when supported because it enables additional receiver, telemetry, and firmware-update features.
Binding
Place the transmitter into registration or binding mode for the selected protocol, then power the receiver and follow the current FrSky binding procedure for your transmitter and firmware version.
PWM Connections
Connect standard servos, the ESC throttle lead, retracts, lights, flaps, landing gear, or other PWM-controlled accessories to the eight channel outputs. Verify signal, positive, and negative wire orientation before powering the receiver.
SBUS Out
Use SBUS Out when connecting the receiver to a compatible flight controller, stabilization system, channel expander, decoder, or other SBUS device. Configure the receiver for the required 16-channel or 24-channel SBUS mode.
SBUS In and Receiver Redundancy
The Archer Plus R8 can serve as the primary receiver in a redundant setup. Connect the SBUS Out port of a compatible secondary FrSky receiver to the R8’s SBUS In port. Confirm that the secondary receiver, signal format, power arrangement, and receiver settings are compatible before flight.
Telemetry and FBUS
The telemetry connection supports S.Port or FBUS operation with compatible FrSky devices. FBUS allows supported sensors, XACT servos, ADV sensors, and other compatible equipment to share simplified control and telemetry wiring.
External Voltage Monitoring
The AIN2 connection supports external battery or device voltage measurement from 0–35V when used with the correct 1:10 voltage divider. Do not connect a flight battery directly to AIN2 without the proper voltage divider or approved voltage-sensing cable.
Antenna Installation
Position the two antennas at different angles to improve signal diversity. Keep both active antenna elements away from carbon fiber, batteries, ESCs, motors, ignition systems, high-current wiring, and other conductive materials. Do not cut, pinch, sharply bend, or modify the antennas.
Firmware Compatibility
Before binding, confirm that the transmitter RF firmware and receiver firmware support the same ACCESS or ACCST D16 version. Firmware mismatches can prevent binding or cause receiver functions to operate incorrectly.
Preflight Check
Confirm correct channel movement, servo direction, failsafe behavior, telemetry operation, and control response before flying. Complete a range check after installation and whenever the receiver, antenna placement, transmitter configuration, or aircraft electronics are changed.
