CSS Electronics CANsub.2 CAN Bus Interface

The CANsub.2 is a compact, professional CAN bus interface with two galvanically isolated CAN FD channels and flexible USB-C and Ethernet interfaces. It streams CAN frames in real time at more than 20,000 frames/s and delivers microsecond-accurate timestamps (1 μs), making it ideal for raster loops, UDS/OBD testing, and real-time diagnostics.

The integrated webCAN interface runs directly on the device and allows browser-based monitoring, DBC decoding, signal plotting, and the execution of time-critical transmit jobs without additional software. Hardware ID filters, configurable silent modes, and transceiver protection mechanisms enhance reliability in the field. Typical applications include vehicle diagnostics, test benches in research and development, machine integration, and field service. For multiplex setups or the highest channel count, the sister model with four channels is available; adapter cables enable easy integration into existing OBD2 or J1939 connectors. Openly documented APIs and Python/SavvyCAN support facilitate automation and integration into test or data acquisition processes. The low weight and compact aluminum housing allow for easy mounting in test benches; the integrated color TFT display shows bus load, error rates, and the current bit rate. Galvanic isolation allows multiple bus segments to be operated safely side-by-side. Firmware updates are available free of charge and improve functionality throughout the product's lifespan.