1- or 2-Port, Low-Speed/Fault Tolerant, USB CAN Interface Device—The USB-8501 is a low-speed controller area network (CAN) interface for developing applications with the NI‑XNET driver. The USB‑8501 is powered over the USB bus and does not require external power. It excels in applications requiring real-time, high-speed manipulation of hundreds of CAN frames and signals such as bus monitoring, automation control, and more. The NI‑XNET device‑driven DMA engine enables the onboard processor to move CAN frames and signals between the interface and the user program without CPU interrupts, minimizing message latency and freeing host processor time for processing complex applications. The USB‑8501 is available with a three‑pin COMBICON synchronization connector for triggering and synchronizing the internal hardware timebase with other devices.