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The Waveshare Industrial USB to RS485 Converter is a commercial-grade, plug-and-play communication adapter designed to bridge USB-equipped host computers (Linux, Windows, macOS, Android) with industrial RS485 fieldbus networks. Built around FTDI’s industry-standard FT232RL processor and the high-speed SP485EEN RS485 transceiver, it provides seamless asynchronous half-duplex communication with auto-transmitting/receiving direction control.

Unlike low-cost consumer USB-RS485 adapters, this industrial-grade converter incorporates robust circuit protection mechanisms: onboard TVS diodes to suppress lightning surges and ESD, self-recovering fuses, and lightning protection diodes to ensure continuous 24/7 operational reliability. Onboard LED indicators display real-time power (PWR), transmit (TXD), and receive (RXD) activity for effortless troubleshooting on the factory floor.

Key Features and Benefits

• Original FT232RL + SP485EEN Solution: Offers fast, stable, and highly compatible communication with baud rates ranging from 300 bps to 921,600 bps.

• Multi-Stage Onboard Protection: Built-in TVS (Transient Voltage Suppressor) suppresses voltage surges and ESD spikes; self-recovery fuses protect against over-current conditions.

• Automatic Transceiving Direction (Zero Delay): Internal Hardware Automatic Flow Control eliminates the need for software handshake signals (RTS/CTS).

• Clear Status Indicators: 3 Onboard LEDs indicate Power (Red), TX Transmit (Green), and RX Receive (Blue) status at a glance.

• Screw Terminal Connection: Heavy-duty screw terminal block for secure wiring of RS485 differential signal lines ($A+$, $B-$, and optional $GND$).

• Cross-Platform Driver Support: Natively supported in Linux kernel; WHQL-certified FTDI drivers for Windows 11/10/8.1/8/7/XP, macOS, and Android.

Technical Specifications

Wiring & Pinout Reference

1. RS485 Screw Terminal Wiring:

   Waveshare Converter                RS485 Target Device (PLC/Sensor)
  +-------------------+                      +-------------------+
  |        A+         |--------------------->|     A+ / D+       |
  |        B-         |--------------------->|     B- / D-       |
  |        GND        |--------------------->|   GND (Shield)    |
  +-------------------+                      +-------------------+

2. LED Indicator Definitions:

Applications

• Industrial Automation & PLCs: Connecting PCs/SBCs to Siemens, Schneider, Omron PLCs, and Modbus RTU I/O modules.

• Building Automation & HVAC: Communicating with energy meters, climate controllers, and smart thermostat networks.

• Solar Inverters & Power Monitoring: Reading telemetry data from Modbus-enabled solar grid tie inverters and power meters.

• Access Control & Security: Managing RFID door readers, PTZ camera controllers, and attendance machines over RS485 bus.

Package Includes

• 1 x Waveshare Industrial USB to RS485 Converter

• 1 x Small Screwdriver (for terminal block adjustment)

Shipping & Delivery

• Free shipping on orders above ₹999 across India

• Dispatched within 1-3 business days

• Expected delivery: 3-7 business days depending on location

• Anti-static anti-ESD packaging for safe transit