USBCANFD-200U/100U
USBCANFD Series CANFD Interface User Manual
©2021 Guangzhou ZLG Electronics Co., Ltd.
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User Manual
CAN_L to CAN_L and CAN_H to CAN_H signals. A linear topology is adopted for the CAN-bus network , and
the two terminals of the bus need to be installed with 120 ohm terminal resistors; if the number of nodes is
greater than 2, the intermediate nodes do not need to install 120 ohm terminal resistors. For branch connections,
the length should not exceed 3 meters. Figure 2.3 shows the connection of CAN-bus bus.
Figure 2.3 Linear topology of the CAN-bus network
In the CAN-bus network, shielded wires are often used for interconnection, so as to enhance the anti-
interference ability. However, there are many types of shielded wires and field wiring is complicated. Therefore,
the wiring diagrams of different types of cables in application are shown below, including the connection diagrams
of double-core single-layer shielded wire, double-core double-layer shielded wire, and three-core single-layer
shielded wire (The "equipment iron shell" in the pictures refers to the outer shell of the device, which is grounded
by default). Regardless of the type of cable, reasonable changes must be made according to the complexity of the
field wiring. Ensure the reliable grounding of the single point of the shielded wire or ground wire at any time, and
carry out on-site wiring in strict accordance with the wiring specifications to minimize communication errors and
abnormalities, and improve the communication quality and service life of the bus.
Figure 2.4 Double-core single-layer shielded cable connection
