Ugreen USB to DB9 RS-232 Adapter Cable 1.5m (UG- 20211)

Ugreen USB to DB9 RS-232 Adapter Cable 1.5m (UG-20211)

The Ugreen USB to DB9 RS-232 Adapter Cable bridges modern computing with legacy serial devices. This UG-20211 model provides reliable serial connectivity for industrial equipment, point-of-sale systems, and specialized hardware through a standard USB port.

Professional-Grade Serial Connectivity

The UG-20211 adapter delivers industrial-quality serial communication capabilities:

• DB9 male connector compatible with RS-232 standard serial ports
• Full support for hardware and software flow control methods
• Data transfer rates up to 921.6Kbps
• Support for all standard baud rates from 75bps to 921.6Kbps
• Configurable data bits, stop bits, and parity options

Furthermore, the UG-20211 maintains signal integrity through premium internal components that ensure reliable communication even in environments with electromagnetic interference.

Advanced Chipset Technology

The UG-20211 features a high-performance FTDI chipset for optimal compatibility:

• FTDI FT232RL chipset with superior driver support
• 256-byte receive buffer and 128-byte transmit buffer
• Hardware-based error detection and correction
• Automatic handshake mechanism ensuring data accuracy
• Low CPU utilization during data transmission

Additionally, the UG-20211 includes built-in EEPROM for storing device identification and configuration parameters, enabling consistent performance across multiple installations.

Universal Compatibility

The UG-20211 works seamlessly across multiple operating systems and environments:

• Windows 11/10/8.1/8/7/Vista/XP (32/64-bit)
• macOS 10.6 and above
• Linux kernel 2.6.31 and above
• Chrome OS with serial support
• Industrial automation systems and embedded controllers

Moreover, the UG-20211 maintains backwards compatibility with older RS-232 equipment operating at various voltage levels through specialized level-shifting circuitry.

Durable Construction

The UG-20211 incorporates high-quality materials for extended service life:

• Premium-grade PVC cable jacket with excellent flexibility
• Gold-plated contacts preventing oxidation and corrosion
• Molded strain relief preventing cable damage at connector points
• Triple-shielded cable reducing electromagnetic interference
• Robust DB9 connector housing withstanding repeated connections

Furthermore, the UG-20211 undergoes rigorous testing with 5,000+ insertion cycles to verify long-term durability under industrial usage conditions.

Practical Design Elements

The UG-20211 features thoughtful design considerations for everyday usability:

• 1.5-meter (4.9 feet) cable length balancing reach with signal integrity
• USB Type-A connector compatible with standard USB ports
• LED activity indicators displaying transmission and reception status
• Compact USB connector housing not blocking adjacent ports
• Screw-locking DB9 connector preventing accidental disconnections

Additionally, the UG-20211 requires no external power supply, drawing minimal current from the USB port while providing reliable operation for connected serial devices.

Ideal Users for the Ugreen USB to DB9 RS-232 Adapter (UG-20211)

• Industrial automation technicians: The FTDI chipset and reliable signal integrity make the UG-20211 perfect for professionals connecting to PLCs, motor controllers, and industrial equipment with serial interfaces.
• IT administrators: System administrators working with legacy servers, network equipment, and console ports will appreciate the UG-20211’s consistent performance and broad compatibility.
• Point-of-sale integrators: The high-quality components and data integrity features make the UG-20211 ideal for connecting modern computers to cash drawers, receipt printers, and barcode scanners using serial communication.
• Laboratory researchers: Scientists working with specialized scientific instruments and data acquisition equipment will benefit from the UG-20211’s precise data transmission capabilities and interference resistance.

Technical Specifications

Interface Specifications

• USB connector: USB Type-A male (USB 2.0 compliant)
• Serial connector: DB9 male (RS-232 standard)
• Signal lines: TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI, GND
• Flow control: Hardware (RTS/CTS, DTR/DSR) and Software (XON/XOFF)
• Transfer rate: Up to 921.6Kbps
• Buffer size: 256-byte receive, 128-byte transmit

Controller Specifications

• Chipset: FTDI FT232RL
• Configuration storage: Internal EEPROM
• Operating current: <100mA at 5V
• Standby current: <20mA at 5V
• ESD protection: ±15kV air discharge, ±8kV contact discharge

Cable Specifications

• Cable length: 1.5 meters (4.9 feet)
• Cable type: 28AWG data pairs with triple shielding
• Outer jacket: Premium PVC
• Shielding: Aluminum foil + braided + outer covering
• Connector plating: Gold-plated contacts

Physical Characteristics

• Dimensions (USB housing): 35×15×10mm
• Dimensions (DB9 housing): 33×31×15mm
• Weight: Approximately 80g
• Color: Black
• LED indicators: TX/RX activity

Compatibility

• Operating systems: Windows 11/10/8.1/8/7/Vista/XP (32/64-bit), macOS 10.6+, Linux kernel 2.6.31+, Chrome OS
• Baud rates: 75, 110, 134.5, 150, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 bps
• Data bits: 5, 6, 7, 8
• Stop bits: 1, 1.5, 2
• Parity: None, Odd, Even, Mark, Space

Package Contents

• Ugreen USB to DB9 RS-232 Adapter Cable 1.5m (UG-20211)
• Driver mini-CD (drivers also available online)
• User manual
• 24-month warranty card