Product image: CAN fibre optics transceiver
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Optical Fibre Transceiver CTrans OL

Special Features

  • Coupling of CAN systems by optical fibre
  • Available for PMMA and glass fibre, connection by pluggable connector or ST
  • Protocol transparent; CAN error handling mechanisms are preserved
  • Extended error suppression
  • LEDs to indicate status


CTrans OL acts as a transceiver for protocol transparent transmission of CAN signals between copper based sections via an optical fibre. Several technical improvements can be obtained by optical transmission of CAN signals, such as secure separation of high voltages and insensitivity to electromagnetic perturbation. Furthermore the transparent transmission of CAN signals with CTrans OL preserves the main benefits of CAN, such as error correction and priority driven bus access. Like repeaters Ctrans OL can be used to build flexible wiring topologies. Star and tree structures as well as stub lines can be realized. The integrated error supression reduces the influence of faulty segments onto intact sections. For the optical connection cost effective PMMA fibres with pluggable connection and 62,5µm multimode glass fibres with ST connectors are supported. Depending on the type of fibre a wiring distance up to 1000m can be achieved. Three LEDs on the front panel indicate the status of the internal power and wether a signal is received on the CAN or fiberoptical connection.

Technical Data

Layout and Connection

CTrans OL devices include one CAN segment (marked ‘CAN’) fed to a three pin pluggable terminal. Power is connected at a two pin pluggable terminal. The optical connection is type dependent either pluggable for PMMA or ST for glasfiber.

Limiting Values

Parameter Minimum Maximum Unit
Storage temperature -30 +80 °C
Operating temperature -20 +60 °C
Supply voltage -100 +35 V
Voltage on bus connections -30 +30 V
Admissible power consumption (at 60°C) n.s. 2000 mW

Any (also temporary) stress in excess of the limiting values may cause permanent damage on CTrans OL and other connected devices. Exposure to limiting conditions for extended periods may affect the reliability and shorten the life cycle of the device.

Nominal Values

Parameter Minimum Typical Maximum Unit
Current consumption (running idle) n.s. 30 n.s. mA
Current consumption (250 kBits/s, 100% busload) n.s. 40 n.s. mA
Supply voltage 10 24 30 V
Propagation delay (per pair of devices) n.s. 125 300 ns

All values, unless otherwise specified, refer to a supply voltage of 24V and an environmental temperature of 20°C.

Scope of Delivery

For US/Canada/Mexico sales, please contact: Traquair Data Systems, Inc. (;; Ph: +1 607 266 6000