Fly-SB2040-V1 CANbus Termination
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Fly-SB2040-V1 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-V1, you will only need to connect the Fly-SB2040-V1s jumper cap. The UTOC 120 ohm resistor is not jumpered and always enabled.
Fly-SB2040-V1 120R jumpers
Fly-SB2040-V1 120R jumpers
  • The Fly-SB2040-V1 has an on-board 120 ohm resistor that is enabled by installing a jumper as shown in the picture above.
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