Best RJ45 Serial Adapters of 2026

The StarTech USB Serial Adapter offers great flexibility for your devices. It allows you to connect legacy equipment like barcode scanners or point of sale systems to modern USB ports, making it useful for various applications such as digital signage. Thanks to the FTDI chipset inside, you get reliable compatibility and the ability to customize connections to fit your specific setup. Its compact design means you don’t need extra power adapters, so it’s easy to carry and use anywhere. Installation is straightforward, providing stable serial communication without hassle, so you can quickly get your devices up and running.

The StarTech DB9 RJ45 Adapter is designed to help you easily convert a DB9 male connector into an RJ45 female connector, making it simple to connect different devices. This adapter supports modular serial connections like RS232, RS422, and RS485, allowing you to work with various communication standards. It also lets you create customized serial connections tailored to your specific needs, which can be especially helpful if you have unique setups. With this adapter, you get a reliable and flexible solution for serial connectivity tasks, helping you save time and avoid compatibility issues.

The StarTech DB9 to RJ45 Adapter is a versatile serial adapter that allows you to connect a DB-9 male port to an RJ-45 female port. This adapter is specifically designed for use with the StarTechcom 16 Port Enhanced RS232 Serial Console Server. With its M/F configuration, it provides a seamless connection between devices, making it easy to transfer data or establish a network connection. The DB-9 (M) to RJ-45 (F) interface ensures compatibility with a wide range of devices, while the gray color adds a sleek and professional look to your setup. Whether you need to connect serial devices or set up a console server, the StarTech DB9 to RJ45 Adapter is a reliable choice that offers convenience and versatility.

The SystemBase Serial to LAN Adapter lets you easily convert your serial connections (RS232, RS422, or RS485) to Ethernet, simplifying network integration. You can switch between RS422 and RS485 modes with an external switch, giving you flexibility to match your setup. The adapter also features clear LED indicators, so you can quickly check the connection status without guessing. Plus, it comes with free software tools like COM Port Redirector and TestView, helping you manage and test your serial devices right from your computer. This makes the adapter a convenient and versatile choice for connecting serial devices to your network.

The OIKWAN Serial Adapter offers versatile connectivity, allowing you to link your Windows, Mac, or Linux devices to various serial equipment like modems, barcode scanners, and POS systems. It features a reliable FTDI chipset that ensures fast and stable data transfer up to 1Mbps, making your connection smooth and efficient. If you use a modern PC or laptop with a USB-C port, this adapter helps you easily connect to Cisco devices such as routers and switches, simplifying your setup. Plus, the USB Type-C to RJ45 cable works seamlessly with Type-C ports, giving you direct access to console ports without hassle.

The Coolwell RS485 Ethernet Server is designed to make industrial data collection and IoT connectivity easier for you. It acts as a multi-purpose device that not only connects RS485 serial devices to Ethernet networks but also supports protocols like Modbus and MQTT, helping you manage your data more efficiently. The device includes both RS485 and Ethernet ports, allowing seamless communication between your equipment and network. Its compact, rail-mountable, flame-retardant case with screw terminals makes installation quick and safe, saving you time and ensuring a secure setup in tough industrial environments.

The somfy RS232 Adapter is designed to help you connect your Somfy Universal RTS Interface II through serial communication. This makes it easier to control your devices using an RS232 connection. The adapter works best when used with cable lengths of 50 feet or less, ensuring a reliable and stable connection without signal loss. If you need a simple and effective way to link your Somfy systems with other serial devices, this adapter provides a convenient solution for short-distance setups.

The APGLSXY RS232 RJ45 Adapter lets you easily extend your 9-pin serial connections up to 65 feet using common Cat5e or Cat6 cables. This means you can connect devices like computers, routers, or industrial machines without hassle. Its plate connectors provide a stable and reliable signal, which is crucial when working with data-heavy setups. The durable PVC housing with molded strain relief protects the adapter from wear and tear, so it can handle demanding environments. This adapter is perfect for IT pros or technicians who need a dependable way to connect legacy equipment in factories, POS systems, or other setups that rely on older devices like barcode scanners or modems.

The waveshare Serial Ethernet Converter lets you easily connect traditional serial devices using RS232, RS485, or RS422 interfaces to an Ethernet network. This means you can transmit data smoothly in both directions, making it easier to integrate older equipment with modern systems. The converter supports all three serial interfaces on one device, so you can use it in various setups depending on your needs. It also features rail-mount support, allowing you to install multiple units neatly in industrial environments. Plus, it works well as a Modbus gateway, helping you upgrade and manage Modbus networks efficiently without communication interference.

The OIKWAN USB Console Cable is designed to connect your PC or laptop directly to Cisco devices like modems, routers, or switches through a USB connection. It features a high-quality FTDI232RL chip, known for its excellent stability and compatibility, ensuring reliable communication with your equipment. The cable uses a USB-C connection that supports transfer speeds up to 1Mbps, allowing smooth data transfer between your computer and RS-232 devices without needing an external power source. With USB Type C and RS232 DB9 connectors, the OIKWAN USB Console Cable makes it easy for you to manage serial-based Cisco devices efficiently and effectively.