Fly-SB2040-V2 CANbus Termination

Fly-SB2040-V2 CAN bus termination

• CAN bus must have two 120 ohm resistors. One at each end of the bus.
• Failure to correctly terminate the CAN bus cause to communication issues and instability.
• No matter how many USB devices you connect on a singe bus only enable one 120 ohm resistor at each end of the bus. There is no need to add a resistor to every CAN device
• The resistance between CAN H and CAN L measured with the system powerd off should be 60 ohms with all CAN devices connected.
• If you are using a UTOC to connect to the Fly-SB2040-V2, you will only need to connect the Fly-SB2040-V2s jumper cap. The UTOC 120 ohm resistor is not jumpered and always enabled.

• The Fly-SB2040-V2 has an on-board 120 ohm resistor that is enabled by installing a jumper as shown in the picture above.

Links

• Mellow Board information site
• Mellow Store
• Mellow Github
• Klipper 3d-Printer firmware
• CanBoot CanBoot Bootloader by Arksine
• Fluidd User interface for Klipper
• Mainsail user interface for Klipper