Best StarTech.com Serial Adapters of 2026

The StarTech.com USB to RS232 Adapter is designed for maximised portability, allowing you to convert a USB port into an RS232 DB9 serial port. This is particularly useful for connecting, monitoring, and controlling serial devices. With broad compatibility, you can easily use it with your USB 1.0 or 2.0 ports on Windows, Mac, or Linux systems. Experience fast transfer speeds with a Baud Rate of up to 921.6Kbps, ensuring efficient data transfer. Its lightweight design fits conveniently into your carrying case, making it ideal for professionals who are always on the move.

The StarTech.com RS232 Adapter provides a reliable way to connect legacy serial devices to your computer via USB. With broad compatibility, you can easily integrate it with various operating systems, including Windows, Linux, and Mac OS. The COM retention feature ensures that your assigned serial COM port values are saved, making reconnection hassle-free. Its versatile functionality allows you to monitor and control industrial sensors and even digital signage boards, enhancing your connectivity options.

The StarTech.com Null Modem Adapter is a practical solution for converting a straight-through cable into a null modem cable. This feature is particularly useful for connecting devices that require a null modem setup, ensuring seamless communication. Its straightforward design makes it easy to use and install, saving you time and hassle. Additionally, the adapter provides a cost-effective option for users, allowing you to maximise your existing equipment without needing to purchase new cables.

The StarTech.com Null Modem Adapter is a practical solution for connecting devices that use DB-9 female connectors. This adapter allows you to easily link two devices without the need for additional hardware, saving you time and effort. Its white colour adds a clean look to your setup, while its compatibility with P/N: PCI2S232485I ensures seamless integration. By using this null modem adapter, you can achieve reliable data transfer between your devices, enhancing your overall connectivity experience.

The StarTech DB9 Serial Adapter offers a right angle design with a male-to-female DB9 connection, making it ideal for connecting serial devices in tight or confined spaces. This M/F serial adapter ensures compatibility with devices using DB-9 ports, providing a reliable and straightforward connection. It is specifically designed to work with part numbers ICUSB2324I and ICUSB2328I, ensuring you have the right adapter for these models. With this adapter, you can easily manage serial connections without hassle, improving your setup’s organisation and accessibility.

The StarTech DB9 Terminal Adapter converts a DB9 male RS422/485 port to a 5 pin terminal block, making it easier for you to connect serial devices with different wiring setups. It supports four wire RS422, RS485, and two wire RS485 modes, allowing versatile use in various communication systems. The adapter uses 3.5 mm 5 pin terminal blocks, which provide a secure and stable connection. Additionally, it supports Signal Ground over terminal blocks, ensuring clear and reliable signal transmission for your serial connections.

The StarTech DB9 Adapter is a handy serial cable adapter designed with a right angle DB9 male to female configuration. This makes it perfect for connecting devices in tight spaces where straight connectors might not fit comfortably. The grey colour and compact size (3.6 cm by 8.1 cm) ensure it blends well with your existing equipment while remaining unobtrusive. As a product from the trusted StarTech brand, it offers reliable performance for your serial connection needs, making your setup more convenient and efficient.