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Optical transmission unit for CAN

Canway (Germany) has launched the CW-131 optical transmission unit featuring six CAN ports, two LIN ports, and four Flexray ports. On the optical connection the data is transferred bidirectional.

THE OPTICAL TRANSMISSION UNIT is equipped with four high-speed CAN interfaces and two fault-tolerant CAN interfaces. The maximum distance of the data transfer depends on several facts such as the attenuation of the optical fiber or the possible overall network length related to the transmission speed. But the maximum is 500 m. The product comes in a 19-inch enclosure comprising two units. The temperature range for operation is -20 °C to +70 °C. A power supply of 100 to 240 VAC or 12 VDC is required. In order to connect the CAN networks 9-pin D-sub connectors are provided.
All data is transmitted via one optic cable containing four fibers; two fibers are used for all CAN ports. The data transfer is carried out with deterministic timing. The optical transmission is the basis for a galvanic isolated connection between test item, data logging, and CAN networks. The product is intended for data exchange between two or multiple HiL (Hardware-in-the-Loop) test benches, e.g. during approval processes of electronic control units. It combines the tests of vehicle part systems (e.g. of the power train or chassis) not necessarily located in the same test areas. Additionally, the unit can be applied for test benches for energy storage. The galvanic isolation works as a shield separating test items and measuring systems.
The transfer of analog and digital signals and the implementation of message filters, will be supported in the future, said Dr. Oliver Steinmetz, Canway’s manager and technical director. By means of filtering the selective transfer of messages between two systems is possible.

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