Professional 4-Port USB to RS422/485 Converter
FTDI chipset • Industrial-grade reliability • Up to 1200m transmission
✨ Key Features
🏭 Perfect For
POS Terminals • PLC Systems • Industrial Automation • Data Acquisition • Networking Equipment • Factory Control Systems
💻 System Support
Windows: XP/7/8/10/11, Server 2003/2008/2012
Linux: Kernel 2.4+ (x86_64)
📦 Package Includes
- 4-Port RS422/485 Adapter
- USB Cable (Type-A to B)
- Power Adapter
- User Manual
🔧 Technical Specs: USB Type-B to 4×DB9 Male • Auto-detect baud rate • Half/Full duplex modes • TX/RX LED indicators
❓ Frequently Asked Questions
Q: What's the difference between RS-422 and RS-485?
A: RS-422 supports full-duplex (simultaneous two-way) communication with up to 10 receivers, while RS-485 supports half-duplex with up to 128 devices on the same bus. This adapter supports both protocols on all 4 ports.
Q: Do I need to install drivers?
A: Yes, FTDI drivers are required. Windows 10/11 may auto-install them, but we recommend downloading the latest drivers from the button above for optimal performance and compatibility.
Q: Can I use all 4 ports simultaneously?
A: Absolutely! All 4 serial ports operate independently and can be used at the same time. Each port appears as a separate COM port in your system.
Q: What cable type should I use for long-distance connections?
A: For distances over 100 meters, use shielded twisted-pair cable (STP) with proper grounding. For maximum 1200m range, use high-quality industrial-grade cable and ensure proper termination resistors.
Q: Does this adapter require external power?
A: It can be bus-powered via USB for basic applications. For industrial environments or when connecting multiple devices, we recommend using the included power adapter (DC 9-36V) for stable operation.
Q: Is this compatible with Modbus RTU protocol?
A: Yes! This adapter works perfectly with Modbus RTU, Profibus, and other industrial protocols that use RS-422/485 physical layer. It's transparent to the protocol layer.