Industrial Two-channel CAN Bus Isolated Repeater. The I-7531 is a CAN repeater used to establish a physical coupling of two or more segments of a CAN bus system. Users can implement tree or star topologies as well as the long drop lines with the I-7531. Users can also increase the maximum number of bus nodes by using the I-7531. The I-7531 is an optically isolated CAN repeater which provides 2500Vrms of optical isolation. This feature helps you t..