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CAN Bus Fiber Optic Transceivers

CAN Network Infrastructure

Several technical improvements can be obtained by optical connections within CAN bus systems with the use of an optical transceiver, such as secure separation of high voltages and insensitivity to electromagnetic interference (EMI). 

As with repeaters, optical transceivers can also be used to extend CAN bus network topologies, including star and tree structures.

Fiber Optic Transceivers
  • Fiber optic transceivers provide optical connectivity between CAN segments whilst maintaining CAN bit-level timing between segments.
  • Transceiver connected CAN segments must operate at the same baud rate, with the maximum baud rate constrained by overall system signal propagation time, including fiber optic transceiver latency and fiber optic cable propagation delay.
  • A bandwidth versus length of fiber trade-off favors short fiber lengths for higher data rates.

Fiber Optic Transceiver example


Learn more about Enhancing CAN systems with optical fiber links.


CAN Bus Fiber optic Interface - CTrans OL

CTransOL Fiber Optic Transceiver

Used in Pairs
Connects 2 CAN segments (with Error Suppression)
Galvanic Isolation
Rail Mounting
Fiber length up to 40m (PMMA) or 1km (ST connectors)
DSub-9 plugs (copper)
PMMA or ST connectors (fiber)