The I-2533CS-A and I-2533CS-B are local CAN bridges used to establish a connection between two CAN bus system via single mode fiber optic transmission medium. In order to solve the problem between CAN and fiber transmission medium, the I-2533CS-A/B are specially designed for converting the electrical CAN bus signal to fiber optic cables. The I-2533CS-A/B supports Wavelength Division Multiplexing (WDM) technology so that only a single fiber cable is needed for transmitting bi-directional CAN data. As the I-2533CS-A and I-2533CS-B must be paired because of hardware limitations, this means that the cost of deploying fiber cable can be effectively reduced. I-2533CS-A/B have three more important features. First, the transmission distance limitation of the CAN bus system will not affected due to the different CAN baud rate. It means that the total CAN bus working distance can be extended. Second, the bus error on one CAN network will not affect the operation of another CAN network. Finally, the two CAN network can communication with each other by using different CAN baud rate for highly flexibility.