USB to RS485 Converter UC-RS485
USB to RS485 Converter UC-RS485
Connecting modern computers to industrial field buses is often challenging due to the absence of native serial ports on newer PCs and laptops. The UC-RS485 bridges this gap by providing a rugged, high-speed USB Type-C to RS485 interface. Built with industrial-grade ESD protection and robust TVS clamping, it delivers dependable serial communication in harsh manufacturing and factory automation environments.
Key Features
- Industrial USB to 2-wire half-duplex RS-485 converter
- Reversible USB Type-C host connector
- Hardware automatic direction control with zero latency
- Bus-powered directly from USB host port (5V DC)
- High-performance FTDI chipset architecture
- Supports standard baud rates from 300 bps to 250 kbps
- Drives up to 256 transceiver nodes across a 1,200 m bus
- ±15 kV ESD protection across differential signal terminals
- Independent LED status indicators for Power, TX, and RX
- Compact enclosure with removable terminal block
Ordering Information
| Product Code | Description |
|---|---|
| UC-RS485 | USB to RS485 Converter (Type-C, Non-Isolated, 256 Nodes) |
| SPD-RS485 | Surge Protection Device RS485 |
| UC-ISO-RS485 | USB to Isolated RS485 Converter (2.5kVrms Isolation) |
| UC-ETH-RS485 | Ethernet to RS485 Converter |
| UC-RS232 | USB to RS232 Converter |
Applications
- Factory Automation & Commissioning: Direct parameter tuning and firmware upgrades on PLCs, drives, and temperature controllers.
- Building Management Systems (BMS): Interfacing HVAC, lighting, and access control Modbus networks.
- Renewable Energy & Solar Monitoring: Querying solar string inverters, battery management systems (BMS), and power loggers.
- Laboratory & Testing Benches: Fast serial data logging and protocol verification from PC terminals.
Specifications
| Parameter | Value |
|---|---|
| Mounting Type | Inline / Portable Field Device |
| Dimensions | 60 mm x 40 mm x 20 mm (L x W x H) |
| Enclosure Material | Industrial ABS Plastic |
| Operating Temperature | 0 °C to +85 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Power Supply | 5V DC (Bus Powered via USB Type-C) |
| Working Current | 200 mA Max |
| Baud Rate Range | 300 bps to 250 kbps |
| Data Format | 7/8 Data bits, 1/2 Stop bits, None/Even/Odd Parity |
| RS485 Bus Capacity | Up to 256 transceiver nodes |
| RS485 Receiver Input | \(\pm 12\text{V}\) between A and B max |
| RS485 Transmit Output | Line A pulled up to +5V, Line B pulled down to 0V |
| RS485 Termination | 120 \(\Omega\) built-in across A and B |
| USB Connector | USB Type-C Receptacle (USB 2.0 Full Speed) |
Isolation & Protection Specifications
| Parameter | Value | Standard / Notes |
|---|---|---|
| Isolation Barrier | Non-Isolated | Direct high-speed USB-to-RS485 transceiver interface |
| ESD Protection | \(\pm 15\text{kV}\) Air / \(\pm 8\text{kV}\) Contact | IEC 61000-4-2 Human-Body Model & Contact |
| Surge Clamping | 600W TVS | Fast bidirectional transient suppression diodes |
LED Indications and Diagnostics
| LED | Color | Status | Description |
|---|---|---|---|
| TX | Red | Blinking | Data transmission from PC to RS485 bus |
| RX | Green | Blinking | Data reception from RS485 bus to PC |
Mechanical Dimensions
Terminal Details & Port Pinouts
6-Pin Screw Terminal Block
| Pin # | Label | Signal | Description |
|---|---|---|---|
| 1 | GND | Ground | Common Signal Ground reference |
| 2 | GND | Ground | Common Signal Ground reference |
| 3 | A+ | RS485 A | Non-inverting differential data line (+) |
| 4 | B- | RS485 B | Inverting differential data line (-) |
| 5 | GND | Ground | Common Signal Ground reference |
| 6 | GND | Ground | Common Signal Ground reference |
Revision History
| Revision | Date | Description of Change |
|---|---|---|
| Rev 1.0 | 2026-09-09 | Initial datasheet release |
Get the latest version of this datasheet : click here..
Support
Website: www.veawe.io
Email: info@veawe.io