CTrans OL

CAN Bus Fiber optic Transceiver

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.

CTrans OL CAN Fiberoptic Interface

Like repeaters the 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 suppression 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 fiberoptic connection.

Key Features

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

Technical Data

CTrans OL devices include one CAN segment fed to a three pin pluggable terminal. Power is
connected at a two pin pluggable terminal. The figure shows the locations of power, CAN and
fiber optical connections. Three LEDs on the front panel indicate the status of power, CAN
and optical transmissions.

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) - 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) - 30 - mA
Current consumption (250 kBits/s, 100% bus load) - 40 - mA
Supply voltage 10 24 30 V
Propagation delay (per pair of devices) - 125 300 ns

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