USB to ISO RS485 Converter UC-ISO-RS485
USB to ISO RS485 Converter UC-ISO-RS485
The UC-ISO-RS485 is a high-reliability industrial USB to isolated RS485 converter. Engineered to bridge PC USB ports with industrial RS485 field buses, it provides 2.5 kVrms galvanic signal isolation and 1 kVrms power isolation. It safeguards connected computers and laptops from high-voltage ground loops, field transients, and severe electromagnetic interference commonly encountered during commissioning and monitoring.
Key Features
- 2.5 kV RMS signal isolation and 1.0 kV RMS power isolation barrier
- Modern reversible USB Type-C host interface
- Bus-powered with internal isolated DC-DC converter (no external supply required)
- Hardware automatic direction control with zero latency
- Up to 256 transceiver nodes on a single RS-485 segment
- Wide supported baud rates from 300 bps to 250 kbps
- Plug-and-play driver support for Windows, Linux, and macOS
- LED status indicators for Power, TX, and RX activity
- ±15 kV ESD and TVS surge suppression on RS-485 lines
- Compact pocket-sized enclosure with screw terminal block
- Dimensions: 60 mm × 40 mm × 20 mm
Ordering Information
| Product Code | Description |
|---|---|
| UC-ISO-RS485 | USB to ISO RS485 Converter (2.5kVrms Isolation, Type-C) |
| SPD-RS485 | Surge Protection Device RS485 |
| UC-RS485 | Non-Isolated Industrial USB to RS485 Converter |
| UC-ETH-RS485 | Ethernet to RS485 Converter |
| UC-ISO-USB-24V | Industrial Isolated USB Repeater (5kVrms) |
Applications
- Factory Floor Field Commissioning: Safe laptop connection to operational PLCs, HMIs, and motor drives without risk of ground loop damage.
- Energy & Power Monitoring: Interfacing Modbus energy meters, solar inverters, and power quality analyzers.
- SCADA & Process Control: Continuous data acquisition from remote RTUs, temperature controllers, and sensor transmitters.
- Lab & R&D Development: Rapid prototyping and testing of RS485 hardware with host PC isolation.
Specifications
| Parameter | Value |
|---|---|
| Mounting Type | Inline / Field Portable |
| 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 Receivers | Up to 256 nodes |
| RS485 Receiver Input | \(\pm 12\text{V}\) between A and B max |
| RS485 Transmit Output | Line A pulled up (+5V), Line B pulled down (0V) |
| RS485 Termination | 120 \(\Omega\) built-in between A and B |
| USB Interface | USB 2.0 Full Speed (12 Mbps), USB Type-C Receptacle |
Isolation & Protection Specifications
| Parameter | Value | Standard / Notes |
|---|---|---|
| Galvanic Signal Isolation | 2,500 V RMS | Optical/digital isolation between USB host and RS485 |
| Power Isolation | 1,000 V RMS | Internal isolated DC-DC converter |
| ESD Protection | \(\pm 15\text{kV}\) Air / \(\pm 8\text{kV}\) Contact | IEC 61000-4-2 Human-Body Model and Air/Contact |
| Surge Clamping | 600W TVS | Fast clamping diodes across differential lines |
LED Indications and Diagnostics
| LED | Color | Status | Description |
|---|---|---|---|
| PWR | Red | ON | USB bus power active and device enumerated |
| TX | Red | Blinking | Transmitting data to RS485 field network |
| RX | Green | Blinking | Receiving data from RS485 field network |
Mechanical Dimensions
Terminal Details & Port Pinouts
6-Pin Pluggable Screw Terminal Block
| Pin # | Label | Signal | Description |
|---|---|---|---|
| 1 | GND | Iso GND | Isolated Signal Ground reference |
| 2 | GND | Iso GND | Isolated Signal Ground reference |
| 3 | A+ | RS485 A | Non-inverting differential data signal (+) |
| 4 | B- | RS485 B | Inverting differential data signal (-) |
| 5 | GND | Iso GND | Isolated Signal Ground reference |
| 6 | GND | Iso GND | Isolated Signal Ground reference |
Isolation Architecture
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