USB to RS-485/RS-422 Converter UT-890A | FTDI Chip | Up to 921.6Kbps | Multi-System Plug-and-Play
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Common Pain Points
Traditional USB-to-RS-485/422 converters often suffer from poor system compatibility (requiring manual driver installation), frequent data loss in noisy industrial environments, low transmission speeds, limited multi-device support, fragile or easily oxidized interfaces, manual handshake control causing software issues, complex wiring, short effective distance, and overall instability that hinders reliable industrial and remote communication.
Solution & Core Features
1.Imported FTDI Industrial Chip — Uses genuine FTDI chipset with automatic data flow direction control, zero-delay transmit/receive switching, no RTS/DTR handshake needed, fully compatible with existing half-duplex software.
2.High-Speed & Stable Transmission — Supports 300bps–921.6Kbps auto-detection, point-to-point and point-to-multipoint (up to 32 devices), excellent anti-interference performance.
3.Robust Protection & Durability — ±15kV ESD protection + surge protection, gold-plated connectors for corrosion resistance, transparent shielded cable with magnetic ring, aluminum foil + braided mesh + all-tinned copper core for superior anti-interference and flexibility.
4.True Plug-and-Play — Driver-free on Windows 8/10/11, auto-recognized on Linux/Mac/Android, hot-swappable, USB bus-powered (no external supply needed).
5.Universal & User-Friendly Interface — USB-A to DB9 male + 5-position terminal block for easy wiring, supports RS-485 2-wire half-duplex and RS-422 4-wire full-duplex modes.
Technical Specifications
| Parameter | Details |
|---|---|
| Model | UT-890A |
| Chipset | FTDI (industrial-grade) |
| Interfaces | USB-A male → DB9 male + 5-position terminal block |
| Standards | USB 1.1/2.0; EIA RS-485/RS-422 |
| Baud Rate | 300 – 921.6 Kbps (auto-detection) |
| Operating Mode | Asynchronous; point-to-point / point-to-multipoint; RS-485 2-wire half-duplex / RS-422 4-wire full-duplex |
| Load Capacity | Up to 32 RS-485/422 devices |
| Transmission Distance | RS-485/422 side: up to 1200 m (at 9600bps); USB side: ≤5 m |
| Protection | ±15kV ESD + surge protection |
| Power Supply | USB bus-powered (no external power required) |
| Operating Temperature | -40°C ~ +85°C |
| Relative Humidity | 5% ~ 95% (non-condensing) |
| Dimensions | Approx. 55 × 36 × 16 mm (main body) |
| Cable Length | Approx. 1.5 m (transparent shielded PVC) |
| Supported Systems | Windows 8/10/11/2000/XP/Vista/7/8/CE/Mac/Linux/Android etc. |
Application Scenarios
Widely used in industrial automation (equipment monitoring & PLC communication), security access control & camera linkage, smart home control, barcode printers/tax machines/CNC tools, parking/highway toll systems, public transport POS & attendance, remote data acquisition, multi-device networks, and any industrial, commercial, or IoT scenario requiring stable, long-distance RS-485/RS-422 bus extension from USB ports.
