StarTech.com USB to RS232/RS485/RS422 4 Port Serial Hub Adapter - Industrial Metal USB 2.0 to DB9 Serial Converter - Din Rail Mountable

Transform a single USB 2.0 port into four versatile COM ports with this rugged StarTech serial hub. Engineered for industrial environments, the four-port USB to RS232/RS422/RS485 adapter comes in a durable metal enclosure and is designed for DIN rail mounting, making it ideal for control panels, factory floors, labs, and field deployments. With support for multiple serial protocols, researchers, technicians, and engineers can connect a wide range of legacy devices—such as CNC machines, barcode scanners, robotic controllers, and data loggers—without sacrificing performance or reliability. This USB 2.0 to DB9 serial converter delivers flexible, scalable connections while keeping your workspace organized and future-ready.

• Four serial ports from one USB connection: Convert a single USB 2.0 port into four COM ports, enabling rapid expansion for legacy devices and equipment that still rely on RS-232, RS-422, or RS-485 interfaces.
• Supports RS-232, RS-422, and RS-485 protocols: Each of the four ports can be configured to the appropriate protocol, providing broad compatibility with a diverse range of industrial instruments and peripherals.
• Industrial metal enclosure and DIN rail mounting: Built for harsh environments, the durable metal housing and ready DIN rail mounting simplify integration into control cabinets, enclosures, or machine panels.
• Plug-and-play USB 2.0 connectivity with broad OS support: Easy setup on compatible systems with minimal configuration; USB bus power eliminates the need for a separate power supply in many deployments.
• Independent, scalable serial channels with diagnostic indicators: Four isolated channels offer flexible configurations, while status LEDs provide quick fault diagnosis and connection verification at a glance.

Technical Details of StarTech.com USB to RS232/RS485/RS422 4 Port Serial Hub Adapter

• USB interface: USB 2.0 (backwards compatible with USB 1.x) for high-speed data transfer
• Port count: 4 external serial ports with DB9 connectors
• Supported protocols: RS-232, RS-422, RS-485 (each port configurable per device requirements)
• Enclosure and mounting: Industrial metal housing with DIN rail mounting capability for modular installation
• Power: Bus-powered via USB; no additional power supply required in typical setups
• Operating system support: Broad compatibility with Windows and Linux environments; driver availability from StarTech
• Connector type: Four DB9 serial connectors for easy connection to standard serial equipment
• Dimensions and weight: Not specified in the available information
• UPC/SKU: Not provided in the accessible specifications

How to install StarTech.com USB to RS232/RS485/RS422 4 Port Serial Hub Adapter

• Connect the USB 2.0 connector on the hub to a free USB port on your computer or compatible device.
• Mount the hub on a DIN rail inside your equipment cabinet or place it in a suitable enclosure for easy access and organization.
• Attach your serial devices to the four DB9 ports, selecting the appropriate RS-232, RS-422, or RS-485 configuration for each device.
• Power on the system and install any necessary drivers if prompted by your operating system. Visit StarTech’s official site to obtain the latest drivers and documentation.
• Configure each serial port within your software or operating system to the required baud rate, parity, data bits, and stop bits. Verify port availability in Device Manager (Windows) or /dev/ttyS*/ttyUSB* (Linux).

Frequently asked questions

• What protocols are supported across the ports? The adapter supports RS-232, RS-422, and RS-485, and each port can be configured independently to match device requirements.
• How many serial ports are provided? The unit delivers four independent serial ports accessible via four DB9 connectors.
• Do I need a separate power supply? The device is typically bus-powered via USB 2.0, eliminating the need for an external power source in standard configurations.
• Can I mount it on a DIN rail? Yes. The enclosure is designed for DIN rail mounting to facilitate integration into control panels and industrial cabinets.
• Which operating systems are supported? Windows and Linux are commonly supported with drivers provided by StarTech; always check the latest compatibility on the product page for your OS.