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Six CAN networks with high- or low-speed transceiver or single wire CAN

At the 16th international congress “Electronic in cars” organized by the VDI (German association of engineers) in Baden-Baden (Germany), K2L (Germany) presented the Optolyzer Mocca compact. It is an out-of-the-box automotive bus interface incorporating most of the current automotive networks. It has six CAN networks with high- or low-speed transceiver or single wire CAN (two CAN selectable).

THE DEVICE CAN BE USED AS AN AUTOMOTIVE BUS INTERFACE for application tests, simulation/verification and gateway applications. Together with various PC software solutions, the product builds tool solutions covering test, simulation and verification tasks during a “typical” development process. To build such a setup it can be connected to a PC via high speed USB 2.0. It incorporates features to act as an interlink between leading-edge automotive bus networks and test PCs. It supports connectivity to CAN (high speed, low speed, single wire) and offers a connection to a client PC through USB.

The typical accuracy of CAN time-stamps is 500 μs. High-speed CAN networks complying with ISO 11898-2 are terminated with 120 Ω at each end. Therefore the company’s product does not terminate the bus. The transmission speed range is from 40 kbit/s to 1 Mbit/s. Fault tolerant CAN networks usually have a distributed termination. The value of the termination in each node depends on the number of nodes in the network. To avoid effects on the total impendence of the network the device has a termination of 5,6 kΩ. Communication over the fault tolerant transceivers has upper limit of 125 kbit/s. The single wire CAN is terminated with 9,1 kΩ. The transmission speed for single wire CANs is 33 kbit/s & 83 kbit/s. The product can put all supported networks in sleep mode and transition from sleep mode to wake-up mode via a CAN interface.

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