Description Waveshare USB TO RS232/485 (B) is an industrial grade isolated USB to RS232/485 converter designed for stable serial communication in electrically noisy environments. It uses the original FT232RNL USB interface chip and supports both RS232 and RS485 device-side communication, making it suitable for industrial control, automation cabinets, PLC communication, serial debugging, and field monitoring. This converter integrates power isolation, digital isolation, TVS protection, and over-current / over-voltage protection into a compact enclosure that supports both wall mounting and 35mm DIN rail mounting. It is a practical choice for more reliable USB to serial conversion where anti-interference and long-term stability matter. Features Industrial grade USB to RS232/485 isolated converter for dependable serial communication. Original FT232RNL chip for stable transmission and broad compatibility. Power supply isolation without requiring an extra isolated-side power source. Digital isolation for stronger anti-interference performance. TVS suppression for surge and transient spike protection. Self-recovery fuse and protection diodes for over-current and over-voltage protection. RS485 120R terminal resistor configurable by jumper. 3 indicator LEDs for power and transceiver status. Wall mount and DIN rail mount support in a compact ABS enclosure. Supports Mac, Linux, Android, WinCE, and Windows platforms. Specifications Item Specification Model USB TO RS232/485 (B) Chip FT232RNL Host interface USB Device interfaces RS232 / RS485 USB operating voltage 5V USB connector USB-B USB protection 200mA self-recovery fuse, output isolation USB distance About 5m RS232 connector Screw terminal RS232 transmission mode Point-to-point RS232 distance About 15m RS232 baud rate 300bps to 921600bps RS485 connector Screw terminal RS485 direction control Hardware automatic control RS485 protection 600W lightningproof and surge suppression, 15KV ESD, onboard 120R balancing resistor RS485 transmission mode Point-to-multipoints, up to 32 nodes RS485 distance About 1.2km at low rate RS485 baud rate 300bps to 921600bps Operating temperature -15C to 70C Humidity 5%RH to 95%RH Enclosure Rail-mount ABS case, suitable for 35mm DIN rail Dimensions 81.9 × 54.0 × 32.0 mm Applications Industrial control and automation systems that require isolated serial communication. PLC communication, control cabinets, and field bus connections. Serial debugging and maintenance of RS232 and RS485 devices. Field data acquisition, remote monitoring, and equipment communication networks. Industrial USB to serial conversion in electrically noisy environments. Product List USB TO RS232/485 (B) x1 USB-A male to USB-B male cable about 1.2m x1 Screwdriver x1 Other Content Waveshare USB TO RS232/485 (B) is built for industrial reliability rather than simple consumer serial conversion. The combination of galvanic isolation, protection circuitry, and industrial mounting options makes it better suited to long-term deployment in cabinets, automation systems, and field equipment. Resources Waveshare Wiki: USB TO RS232/485 (B) FT232RNL Reference USB TO RS232/485 (B) User Manual FTDI Virtual COM Port Drivers Raspberry Pi Documentation FAQ Does this converter support both RS232 and RS485?Yes. It supports both RS232 and RS485 communication on the device side, making it flexible for industrial serial integration. Is this an isolated industrial converter?Yes. It includes both power isolation and digital isolation, plus surge and over-current protection for more stable industrial use. Can it be mounted on a DIN rail?Yes. The enclosure supports both wall mounting and 35mm DIN rail mounting. What operating systems are supported?It supports Mac, Linux, Android, WinCE, and Windows 11 / 10 / 8.1 / 8 / 7.
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