WIKI: docs.waveshare.com/USB_TO_RS485_E
Weight: 0.014 kg
USB TO RS485 (E) x1

This is an industrial-grade, isolated USB to RJ45 single-channel RS485 converter featuring the original FT232RNL chip. Onboard isolated RS485 transceiver circuit, adopts an RJ45 port with T568B pinout, for stable and reliable communication, suitable for industrial control equipment, instrumentation, access control and security, PLC communication, and other applications.

| PRODUCT TYPE | Industrial grade isolated USB to RJ45 single-channel RS485 converter | |
|---|---|---|
| Baud rate | 300bps ~ 512,000bps | |
| Host port | USB | |
| Device port | RJ45 single-channel RS485 | |
| USB | Operating voltage | 5V |
| Connector | USB-A port | |
| Interface Protection | Over-current protection, ESD protection, and transient surge suppression | |
| Transmission distance | Approx. 5m | |
| RS485 | Connector | RJ45 port with T568B pinout |
| Pins | 1=A, 2=B, 3=NC, 4=5V, 5=5V, 6=NC, 7=GND, 8=GND | |
| Direction control | Hardware automatic control | |
| Interface Protection | Surge suppression, ESD protection, over-current/over-voltage protection, reverse surge protection, and bus matching optimization capability | |
| Isolation solution | Isolated RS485 transceiver, integrated signal and power supply isolation | |
| Channel | Single-channel RS485 | |
| Transmission distance | Approx. 1.2km (low rate, with ideal cables) | |
| Transmission mode | Point-to-multipoints (up to 32 nodes, it is recommended to use repeaters for 16 nodes or more) | |
| LED indicators | TXD | TX Indicator: Green LED flashes when the USB port sends data |
| RXD | RX Indicator: Yellow LED flashes when the device port sends data back | |
| Operating environment | Temperature | -40℃ ~ 85℃ |
| Humidity | 5%RH ~ 95%RH | |
| Operating system | Mac, Linux, Android, WinCE, Windows 11 / 10 / 8.1 / 8 / 7 / XP | |
Features the FT232RNL USB-to-UART Bridge with mature drivers, stable communication, and excellent compatibility. Paired with an isolated RS485 transceiver circuit for stable and isolated conversion between USB and the RS485 bus

The USB signal can be converted into a balanced differential RS485 signal, with automatic hardware transceiver direction control. Supports 300bps ~ 512,000bps baud rate, and the RS485 transmission distance is up to 1.2km at low baud rates under ideal cable conditions

Supports Mac, Linux, Android, WinCE, Windows 11 / 10 / 8.1 / 8 / 7 / XP,
compatible with PCs, industrial computers, embedded hosts, and other devices

Onboard TVS (Transient Voltage Suppressor), effectively suppresses surge voltage and transient spike voltage in the circuit, surge & ESD protection. Onboard resettable fuses and protection diodes, ensure the current/voltage stable outputs, provide over-current/over-voltage protection, improve shock proof performance.

Adopts an RJ45 port for single-channel RS485 output,
enabling quick connection to compatible devices or adapter cables using the same pinout

Onboard TXD and RXD indicators clearly show the USB and RS485 operating status for easy on-site debugging and troubleshooting


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