Introduction

1. Product Overview

FLY SB2040 PRO V3 is a toolboard developed by Guangzhou Meilun Electronics Technology Co., Ltd. for the VORON Stealthburner printhead. With this toolboard, four wires can replace the complicated wiring between the mainboard and the printhead, optimizing the layout. SB2040 is applicable to Stealthburner and Afterburner. It integrates a CAN transceiver, RS232 transceiver, USB port, TMC2240 driver, LIS2DW accelerometer, three controllable fans, and other functional modules. This toolboard is compatible with Klipper and RRF firmware.

1.1 Product Features

• Features a Boot button, allowing users to update firmware by entering Boot mode via Type-C
• Supports Klipper firmware and RRF firmware
• Supports CAN mode, RS232 mode, and RRF CAN mode
• Offers higher transmission speed and stronger stability in RS232 mode. In CAN mode, supports CAN expansion with a reserved CAN expansion interface
• Temperature sensor support: onboard MAX31865 chip, compatible with PT100 and PT1000 temperature sensors
• Onboard LIS2DW accelerometer and LDC1612 sensor
• Features RGB interface, onboard 2240 driver, supports various leveling sensors such as Klicky, Voron Tap, PL08n, etc.
• Supports 12-24V voltage and 15A current input, larger heating cartridge port with a rated current of 10A

1.2 New Features

• Supports switching between Klipper CAN mode, RS232 mode, and RRFCAN mode
• Newly added RS232 mode provides higher transmission speed and better stability, and is easier to debug
• Newly added RRF CAN mode allows switching to RRF toolboard, enhancing versatility
• Newly added CAN expansion interface for convenient expansion of CAN devices
• Newly added terminal resistor DIP switch, allowing selection of 120R terminal resistor via DIP switch without jumper wires
• Newly added 1-meter power/signal cable with twisted pair design for 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
• Onboard sensors: LIS2DW, optional ldc1612 and max31865
• Heating cartridge interface: Heating cartridge (HEAT0)
• Expansion interfaces: RGB, EndStop, PT100/PT1000, XH2.54-2P CAN port
• Fan interfaces: one DC fan port, two DC or PWM fan ports
• Motor driver: onboard TMC2240
• Temperature sensors: one 100K NTC or PT1000 (TH0), one PT100/PT1000 selectable

4. Product Categories

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	❌	❌	✅	❌	❌	✅

Product Notes

Output Port	Max Current at 24V	Max Current at 12V
Heater Port	5A	2.5A
Fan Port	1A	0.5A