Waveshare CAN FD to RS232/RS485 Bidirectional Protocol Converter - DIN-Rail Mount

This converter provides a single serial channel that can be configured as either RS232 (point-to-point, voltage-based) or RS485 (multi-drop, differential). The selection is made via hardware jumpers or software configuration. RS485 is preferred for longer distances and noisy industrial environments, while RS232 is suitable for direct connections to legacy equipment like PCs or displays.

The converter is configured using the dedicated Waveshare host configuration software or via AT commands sent through its serial port. You can set it to act as a Modbus Master (polling RS485 devices) or Modbus Slave (responding to CAN requests). The software allows mapping of specific CAN IDs to Modbus register addresses for seamless protocol translation.

Any stable DC power source within 9V to 36V range is suitable, such as a 12V or 24V industrial switching power supply. The wide input range ensures compatibility with common vehicle electrical systems (12V/24V) and standard industrial control cabinet voltages (24V). Ensure the power supply can deliver sufficient current, typically a few hundred milliamps.

Yes, the module includes a built-in 120Ω termination resistor for the CAN bus line, which can be enabled or disabled via a switch. This resistor should be enabled only if the module is at one end of the CAN bus network. If multiple devices with termination are present on the same bus, ensure only the two devices at the physical ends have termination enabled to prevent signal reflection.