StarTech.com 1P3FFCNB-USB-SERIAL 3.3 ft USB-A to RS-232 Null Modem Serial Adapter Cable

StarTech 3ft (1m) USB to Null Modem Serial Adapter Cable, COM Retention, FTDI, RS232, Changeable DB9 Screws/Nuts, Windows/macOS/Linux

The StarTech.com 1P3FFCNB-USB-SERIAL USB to RS-232 null modem serial adapter adds reliable DCE serial communications to a desktop or laptop computer through an available USB Type-A port. With a female DE-9 connector and integrated null modem wiring, it helps resolve DCE/DTE conflicts without requiring additional cross-wired serial cables or adapters. The 3.3-foot cable is suitable for connecting computers to compatible serial equipment in office, industrial, service, and control environments.

Flexible Serial Connectivity

This StarTech.com serial adapter features interchangeable mounting hardware for convenient device compatibility. Pre-installed slotted D-Sub thumbscrews can secure the adapter directly to a serial device, while the included DB-9 nuts support connection with other serial peripherals and cables. The FTDI FT232R chipset delivers dependable USB-to-serial communication with data rates up to 921.6 Kbps and a 128-byte buffer.

Easy Monitoring and Broad Compatibility

Integrated transmit and receive LEDs provide real-time visibility into serial port activity, while the USB indicator confirms successful recognition by the host computer. The adapter supports Windows 7 and newer, macOS 10.15 and newer, ChromeOS, and Linux. Automatic driver installation simplifies setup on supported systems, and COM port retention helps preserve the assigned port value after reconnection or system reboot.

Durable Construction

A one-piece molded thermoplastic elastomer housing, copper shielding, and gold-plated connectors help support long-term performance and signal integrity. Level-4 ESD protection safeguards against electrostatic discharge up to 15 kV through air and 8 kV through contact, while copper shielding helps reduce electromagnetic and radio-frequency interference. The RoHS-compliant StarTech.com 1P3FFCNB-USB-SERIAL package includes the serial adapter, two DB-9 nuts, and a quick-start guide.

Features:

• Interchangeable mounting hardware: Use the pre-installed DB-9 screws or included DB-9 nuts to connect the null modem adapter to compatible serial devices and cables.
• USB serial expansion: Add an RS-232 female DE-9 DCE port to a computer through a USB Type-A connection without using an additional cross-wired cable.
• LED status indicators: Monitor transmit and receive activity while confirming successful USB device recognition.
• Broad operating system support: Compatible with Windows 7 and newer, macOS 10.15 and newer, ChromeOS, and Linux, with automatic driver installation on supported systems.
• COM port retention: Automatically reassigns the previous COM port value after the adapter is disconnected, reconnected, or the computer is rebooted.
• Reliable construction: Molded TPE housing, copper shielding, gold-plated connectors, and Level-4 ESD protection help improve durability and signal performance.
• Technical specifications: FTDI FT232R chipset, data rates up to 921.6 Kbps, 128-byte buffer, black finish, and RoHS-compliant construction.