DIGITUS USB to DB9 RS232 cable with FT232RNL Black PVC Jacket,1.8 m

Features

The DIGITUS DA-70172 adapter bridges legacy RS-232 (DB9) devices to computers lacking native serial ports. One end carries a standard USB-A plug, the other a 9-pin DB9 male connector with screw-lock retention.

The FTDI FT232RNL chipset emulates a true RS-232 interface with authentic voltage levels (±5 V, ±3.3 V, etc.), ensuring compatibility with voltage-sensitive industrial hardware.

Baud rates range from 75 bit/s to 128 kbit/s, covering the majority of legacy and lab equipment requirements. Fixed COM port assignment simplifies software configurations that depend on consistent port numbering.

The 1.8 m cable length allows flexible placement of the host computer. Tx/Rx and power LEDs provide instant visual feedback on connection status.

Support for remote wake-up and USB power management adds utility in automated or always-on setups.

Technologies (used)

• FTDI FT232RNL chipset
• Full-duplex USB-to-RS-232 emulation
• Wide baud rate support
• Fixed COM port assignment
• True RS-232 signal levels (±5 V / ±3.3 V)
• Remote wake-up and USB power control

Technical specifications

• Type: USB 2.0 to RS-232 (DB9) adapter
• Chipset: FTDI FT232RNL
• Connectors: USB-A (male) → DB9 (male)
• Cable length: 1.8 m
• Data rates: 75 – 128,000 bit/s
• OS support: Windows 11/10/8.1/8/7/Vista/XP, macOS, Linux, ChromeOS (with drivers)
• Gold-plated contacts: yes
• Status indicators: LEDs (Tx/Rx, Power)
• DB9 retention: screw-lock
• Power: USB bus-powered

Who it's for

• engineers working with industrial legacy equipment
• system administrators managing older servers and controllers
• service centre and laboratory technicians
• developers testing RS-232-based devices
• users of serial-port hardware without modern replacements

Conclusion

The DIGITUS DA-70172 provides a solid, FTDI-based solution for maintaining reliable serial communication with older devices in environments where legacy hardware remains essential.