Introduction

1. Product Introduction

FLY SB2040 PRO V3 is a tool board developed by Guangzhou Muleun Electronic Technology Co., Ltd. for the VORON Stealthburber print head. With this tool board, four wires can replace the complicated wiring between the mainboard and the print head, optimizing the layout. SB2040 is suitable for stealthburner and afterburner. It integrates CAN transceiver, RS232 transceiver, USB port, TMC2240 driver, LIS2DW accelerometer sensor, three controllable fans and other functions. This tool board is suitable for Klipper and RRF firmware.

1.1 Product Features

• Boot button reserved, users can enter Boot mode via TypeC to update the firmware
• Supports Klipper firmware, RRF firmware
• Supports CAN mode, RS232 mode, RRF CAN mode,
• In RS232 mode, it has higher transmission rate, stronger stability. In CAN mode, it supports CAN expansion, with reserved CAN expansion interface
• Temperature sensor support: On-board MAX31865 chip, compatible with PT100 and PT1000 temperature sensors.
• On-board LIS2DW acceleration sensor and LDC1612 sensor
• Reserved RGB interface, on-board 2240 driver, supports various leveling sensors, such as klicky, Voron Tap, PL08n, etc.
• Supports 12-24V voltage, 15A current input, increased heater port, rated current 10A

1.2 New Features

• Supports switching between Klipper CAN mode, RS232 mode, RRF CAN mode
• Added RS232 mode, with higher transmission rate, stronger stability, and simpler debugging
• Added RRF CAN mode, which can be switched to RRF tool board, enhancing versatility
• Added CAN expansion interface, convenient for expanding CAN devices
• Added terminal resistor switch, the terminal resistor 120R can be selected via switch, no need for jumper
• Added 1-meter power/signal connection cable, the cable uses twisted pair design, with stronger anti-interference performance

1.3 Product Specifications

• MCU: Raspberry Pi rp2040, Dual core ARM Cortex-M0+@133MHz
• Connection interface uses XT30 (2+2) connector supporting 15A current, peak 30A
• Firmware: Reprap/Klipper
• Input voltage: DC12V-24V
• Logic voltage: DC3.3V
• On-board sensors: LIS2DW and optional ldc1612 and max31865
• Heater port: Heater (HEAT0)
• Expansion interface: RGB, EndStop, PT100/PT1000, XH2.54-2P CAN port
• Fan interface: One DC fan, two DC fans or PWM fans
• Motor driver: On-board TMC2240
• Temperature sensor: One 100K NTC or PT1000 (TH0), one PT100/PT1000 optional

4. Product Classification

RRF tutorial link RRF

SB2040	V3	Plus V3	Max V3	Pro V3	Pro Plus V3	Pro Max V3
Drive
Klipper CANBus	✅	✅	✅	✅	✅	✅
Klipper RS232	✅	✅	✅	✅	✅	✅
RRF CANBus	❌	❌	✅	❌	❌	✅
LIS2DW	✅	✅	✅	✅	✅	✅
MAX31865	❌	✅	✅	❌	✅	✅
LDC1612	❌	❌	✅	❌	❌	✅