Beacon F20P

Delivers centimeter level accuracy within seconds based on U-blox triple-band L1/L2/L5 ZED-F20P GNSS RTK module. Onboard RM3100 and BMP581 sensors.

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Features

• 5V - 100mA power supply

• LEDs status: Power/RTK

• Timepulse & External Interrupt

• USB/I²C/SPI/UART digital interfaces

• Gold plated SMA connector

• Onboard Bosch BMP581 barometer

• Onboard PNI RM3100 compass

Applications

• Drones

• RTK Base

• Ground vehicles

• Precise navigation

In production

Description

The Siderion Beacon F20P is an affordable, compact, and high-precision triple-band L1/L2/L5 GNSS RTK (Real-Time Kinematic) device. Powered by the latest generation of u-blox ZED-F20P modules, the Beacon F20P supports concurrent reception of GPS, Galileo, BeiDou, QZSS, and NavIC signals. Consequently, the device delivers reliable performance and fast convergence, achieving centimeter-level accuracy in seconds. The onboard BMP581 absolute barometric pressure sensor and the professional-grade RM3100 compass enhance the overall performance of the Beacon F20P. Its JST-GH connectors make it ideal for integration with Pixhawk or other autopilot systems. The Beacon F20P operates across a temperature range from -40°C to +70°C.

Device summary

Order ref code	Temperature range [°C]	Product size [mm]	Weight [g]
Beacon F20P	-40 to +70	63.0 x 33.0 x 13.4	20

Product description, LED & pinout

Overview

LED sequence

LED name	Color	Light sequence	Comment
Power	Blue		Solid blue LED when powered ON
RTK Status	Green		3D fix mode / No RTK fix
RTK Status	Green		RTK fix but no FIXED RTK fix
RTK Status	Green		FIXED RTK fix

Pin description

UART Port

Pin	Name	Type	Function
A1	5V IN	P	5V input
A2	UART2 TXD	O	UART2 transmit
A3	UART2 RXD	I	UART2 receive
A4	EXTINT	I	External interrupt
A5	TIMEPULSE	O	Timepulse output
A6	GND	P	Ground reference

P : Power / I : Input / O : Output

GPS Port

The SPI port is available only when the D_SEL pin is pulled LOW.

The USB port can be used only when the GPS port is not used, and vice versa.

P2 Port

IO	Name	IO	Name	IO	Name	IO	Name
1	VUSB	7	I2C_SDA	13	UART1_RX	19	VUSB
2	VUSB	8	GND	14	GND	20	VUSB
3	GND	9	I2C_SCL	15	GND	21	GND
4	GND	10	GND	16	GND	22	GND
5	GND	11	UART1_TX	17	GND	23	GND
6	GND	12	GND	18	GND	24	GND

P : Power / I : Input / O : Output

P1 Port

Connector reference: DF40C-20DP-0.4V(51) - HIROSE ELECTRIC

U-blox ZED-F20P Specifications

Electrical specifications

Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Units
Vusb	USB supply voltage		4.5	5.0	5.5	V
Vdd	Internal supply voltage			3.3		V
Vdd_IO	Supply voltage for I/O			3.3		V
Idd	Current consumption	w/o active antenna		50		mA
		w/ active antenna		130		mA
Vil	IO pin low level input voltage		0		0.8	V
Vih	IO pin high level input voltage		2		Vdd+0.3	V
Vol	IO pin low level output voltage	Iol = 1mA			0.4	V
Voh	IO pin high level output voltage	Ioh = 1mA	Vdd-0.4			V
Top	Operating temperature		-40		+70	°C

General performance

Parameter	Specifications	Value
Receiver type	Multi-band GNSS high precision
Accuracy of Timepulse	RMS 99%	30 ns 60 ns
Frequency of Timepulse		0.25 Hz to 10 MHz
Operational limits	Dynamics Altitude Velocity	< 4g 80,000 m 500 m/s
Velocity accuracy		0.03 m/s

GNSS performance

GNSS	Parameter	GPS+GAL+BDS
Acquisition	Cold start Hot start Aided start	25 s 2 s 2 s
Update rate	RTK PVT RAW	25 Hz 25 Hz 25 Hz
Convergence time	RTK	< 7 s
Horizontal pos. accuracy	PVT RTK	1.2 m CEP 0.006 m + 1ppm CEP
Vertical pos. accuracy	RTK	0.01 m + 1ppm CEP
Sensitivity	Tracking & Nav. Reacquisition Cold start Hot start	-167 dBm -160 dBm -148 dBm -158 dBm

GNSS modes

System	Signal	Frequency
GPS	L1C/A L2C L5	1575.420 MHz 1227.600 MHz 1176.450 MHz
Galileo	E1-B/C E5a	1575.420 MHz 1176.450 MHz
BeiDou	B1l B1C B2a	1561.098 MHz 1575.420 MHz 1176.450 MHz
QZSS	L1C/A, L1C/B L2C L5	1575.420 MHz 1227.600 MHz 1176.450 MHz
NavIC	L1-SPS Data L5-SPS	1575.420 MHz 1176.450 MHz

PNI RM3100 Specifications

Electrical specifications

Symbol	Parameter	Min.	Typ.	Max.	Units
Vdd	Internal supply voltage	2.0	3.0	3.6	V
Vdd_IO	Supply voltage for I/O	2.0	3.0	3.6	V
Vdd_Ripple	Vdd ripple voltage			0.05	Vpp
Idd	Current consumption			1	mA
Vil	IO pin low level input voltage	0		0.3* Vdd	V
Vih	IO pin high level input voltage	0.7* Vdd		Vdd	V
Iidle	Idle Mode Current			1	µA
Ileak	Leakage Current @ DVDD pin (AVDD=AVSS=DVSS=0V, DVDD=3.6V)			100	nA
Top	Operating temperature	-20		+85	°C

Sensor performance

Parameter	50 cycles	100 cycles	200 cycles	Units
Field Measurement Range	-800 to +800	-800 to +800	-800 to +800	µT
Gain	20	38	75	LSB/µT
Sensitivity	50	26	13	nT
Noise	30	20	15	nT
Noise Density @ Max. Single-Axis Sample Rate	1.2	1.2	1.2	nT/√Hz
Repeatability over ±200 µT	15	8	8	nT
Hysteresis over ±200 µT	15	15	15	nT
Linearity over ±200 µT	0.5	0.5	0.5	%
Maximum Single-Axis Sample Rate (divide by 3 for max. 3-axis sample rate)	1600	850	440	Hz
Single-Axis Average Current @ 24 Hz Sample Rate (equivalent to 3-axis @ 8 Hz)	70	135	260	µA
Bias Resistor, Rb	121	121	121	Ω
External Timing Resistor for Clock, REXT	33	33	33	KΩ
Circuit Oscillation Frequency	180	180	180	kHz

Bosch BMP581 Specifications

Sensor performance

Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Units
Type	Absolute barometric pressure sensor
Pres	Pressure Range		30		125	kPa
Vdd	Supply Voltage (VDD)		1.65		3.6	V
Idd	Current Consumption	Peak Deep standby			260 0.55	µA
Abac	Absolute Accuracy	-5°C to 65°C		±30		Pa
Reac	Relative Accuracy	700 to 1100 hPa		±6		Pa
Reac	Relative Accuracy	900 to 1100 hPa		±0.4		Pa
Noise	Noise (Lowest Bandwidth)			0.08		Pa
Temp_off	Temperature Coefficient Offset			±0.5		Pa
ltd	Long-term Drift (12 months)			±0.1		Pa
Sd	Solder Drift			±30		Pa
ODR	Output Data Rate	continuous mode normal mode			480 240	Hz Hz
Int	Interfaces	I²C			1	MHz
Temp	Temperature Range		-40		85	°C

Mechanical Drawings