Best Serial Port Servers

Looking for the best serial port servers to connect your older devices to modern networks? Discover our top 10 picks that combine reliability, ease of use, and cutting-edge technology to transform your workflow and unlock the full potential of your devices.

Serial port servers are essential tools for connecting older devices to modern networks. They bridge the gap between serial communication and Ethernet, making it easy to manage and monitor your equipment remotely. Whether you’re upgrading industrial systems or home setups, these devices ensure seamless integration.

Choosing the right serial port server can transform your workflow. From compact designs for tight spaces to industrial-grade solutions for tough environments, there’s a perfect match for every need. Features like Modbus conversion, PoE support, and multi-port options make these servers versatile and powerful.

Ready to unlock the full potential of your devices? Dive into our guide to discover the best serial port servers that combine reliability, ease of use, and cutting-edge technology. Let’s find the ideal solution for your setup!

List of Top 10 Serial Port Servers

Title	Best For	Price
MOXA NPort 5110-1 Port Serial Device Server, 10/100 Ethernet, RS232, DB9 Male	The MOXA NPort 5110-1 is perfect for anyone needing to connect serial devices to a network easily. Its small size, simple setup, and versatile operation modes make it ideal for both beginners and experts.	View on Amazon (paid link)
PUSR USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1)	This RS232 to Ethernet converter is perfect for anyone needing to connect serial devices to a network. It’s ideal for device networking, data transmission, and remote monitoring.	View on Amazon (paid link)
Serial Port Server, HF2211 Serial Server RS232/485/422 to & Ethernet Serial Server Module Serial Port Communication Device DTU, Device Servers	This Serial Port Server is perfect for anyone needing to connect devices with RS232/485/422 ports to Ethernet networks. It’s ideal for industrial automation, remote monitoring, or IoT applications.	View on Amazon (paid link)
LINOVISION Dual Ports Serial Server, RS485 and RS232 to Ethernet Convertor, Modbus RTU/TCP Conversion, RS485 and RS232 to RJ45 Convertor, Processor Upgraded	This LINOVISION Dual Ports Serial Server is perfect for anyone who needs to connect RS232 and RS485 devices to Ethernet for remote monitoring and control. It’s ideal for POS systems, agricultural sensors, PLCs, and medical devices that require reliable, efficient performance in industrial settings.	View on Amazon (paid link)
Lantronix UD1100001-01 UDS1100 – One Port Serial (RS232/ RS422/ RS485) to IP Ethernet Device Server – UL864, US Domestic 110VAC – Convert from RS-232, RS-485 to Ethernet	This Lantronix UD1100001-01 UDS1100 is perfect for anyone needing to quickly and easily connect older equipment to a modern Ethernet network. It’s ideal for bringing remote management capabilities to devices that weren’t originally designed for network connectivity, making them accessible and controllable from anywhere.	View on Amazon (paid link)
XRIKUI Dual Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE 2X DB9 Card	This XRIKUI Dual Port PCI Express RS-232 DB9 Serial Port Card is perfect for anyone needing to connect multiple serial devices to their Windows or Linux PC. It’s ideal for expanding connectivity in standard or 2U computers with available PCIe slots.	View on Amazon (paid link)
PUSR TCP232-306 RS232 RS485 RS422 to Ethernet TCP IP Modbus Gateway Serial Device Server Serial to ethernet converters	This product is perfect for anyone who needs to connect serial devices to an Ethernet network. It’s ideal for industrial or commercial use where reliable and stable communication is key.	View on Amazon (paid link)
StarTech.com 1-Port Serial to Ethernet Adapter, IP Serial Device Server for Remote RS232 Devices, Wall/DIN Rail, LAN to DB9, TAA	This StarTech.com Serial to Ethernet Adapter is perfect for anyone needing to connect RS232 devices remotely over a network. It’s ideal for POS systems, barcode readers, sensors, and more, offering easy management and rugged durability.	View on Amazon (paid link)
Waveshare Industrial Serial Server RS485 to RJ45 Ethernet TCP/IP to Serial Rail-Mount Support with PoE Ethernet Port + Electrical Isolation	This Waveshare Industrial Serial Server is perfect for industrial environments needing reliable RS485 to Ethernet conversion. It’s ideal for data acquisition, IoT gateways, and intelligent monitoring where safety and ease of installation are key.	View on Amazon (paid link)
MOXA NPort 5650-16 – 16 Ports Rackmount Serial Device Server, 10/100 Ethernet, RS-232/422/485, RJ-45 8pin, 15KV ESD	The MOXA NPort 5650-16 is perfect for anyone needing to connect multiple serial devices to a network. It’s ideal for IT pros, engineers, or businesses managing RS-232/422/485 devices with 16 ports and easy setup.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 Serial Port Servers handpicked for performance, features, and value. Whether you need industrial-grade reliability or budget-friendly options, this guide has you covered. Find the perfect match for your needs and unlock seamless serial-to-Ethernet connectivity today.

1. MOXA NPort 5110-1 Port Serial Device Server, 10/100 Ethernet, RS232, DB9 Male

The MOXA NPort 5110-1 is a compact device server that connects serial devices to Ethernet networks. Its small size makes it easy to install in tight spaces.

It offers real COM/TTY drivers for Windows and Linux, ensuring smooth integration with your systems. You can configure it using Telnet, a web browser, or a Windows utility, making setup a breeze.

SNMP MIB-II allows for network management, while standard TCP/IP and versatile modes ensure reliable operation. Simple, efficient, and ready to use.

Pros	Cons
Compact design ensures easy installation in tight spaces. Real COM/TTY drivers for seamless Windows and Linux integration. Multiple configuration options via Telnet, web, or Windows utility. SNMP MIB-II for efficient network management.	Limited to 1 port, not ideal for multiple devices. No advanced security features like encryption or VPN. Basic network management, lacks advanced monitoring tools.

Perfect For:

The MOXA NPort 5110-1 is perfect for anyone needing to connect serial devices to a network easily. Its small size, simple setup, and versatile operation modes make it ideal for both beginners and experts.

Ready to Purchase?

View Price on Amazon (paid link)

2. PUSR USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS (1)

Unlock seamless communication with the USR-TCP232-302. This tiny RS232 to Ethernet converter makes connecting your serial devices to the network a breeze. It’s designed for bidirectional transparent transmission, ensuring your data flows effortlessly.

This powerful module supports DHCP and DNS, making network setup incredibly simple. You can easily configure settings via webpage and upgrade firmware over the network. With a 10/100Mbps RJ45 port and flexible serial baud rates, it’s ready for any challenge.

Choose from multiple work modes like TCP Server or UDP Client. Its heartbeat package mechanism guarantees a reliable connection, keeping your devices always online.

Pros	Cons
Effortlessly connect RS232 to Ethernet. Simple setup with DHCP and DNS. Reliable connections with heartbeat and registration packages. Versatile with multiple work modes. Compact size for easy integration.	Limited to RS232 interface, no support for other serial protocols. No built-in Wi-Fi, requires Ethernet connection for operation. Basic security features, lacks advanced encryption options.

Perfect For:

This RS232 to Ethernet converter is perfect for anyone needing to connect serial devices to a network. It’s ideal for device networking, data transmission, and remote monitoring.

Ready to Purchase?

View Price on Amazon (paid link)

3. Serial Port Server, HF2211 Serial Server RS232/485/422 to & Ethernet Serial Server Module Serial Port Communication Device DTU, Device Servers

The HF2211 Serial Port Server turns your RS232/485/422 devices into Ethernet-ready machines. It’s a plug-and-play solution for serial-to-network communication.

It supports HTTP, Modbus conversion, and NTP functions. You can set up virtual data channels and use custom scripts. It also handles packet filtering and serial framing.

Configure it via web page, CLI, or Telnet. It works with Windows and Win Server. The Wi-Fi supports 802.11 b/g/n and up to 15 connections.

Pros	Cons
Connects RS232/485/422 devices to Ethernet easily. Supports Modbus conversion and HTTP protocol for flexibility. Offers virtual serial ports for Windows systems. Handles up to 20 network connections for reliable communication.	No local data storage for offline needs. Lacks VPN and APN functions for advanced networking. No Modbus Master support for specific industrial control.

Perfect For:

This Serial Port Server is perfect for anyone needing to connect devices with RS232/485/422 ports to Ethernet networks. It’s ideal for industrial automation, remote monitoring, or IoT applications.

Ready to Purchase?

View Price on Amazon (paid link)

4. LINOVISION Dual Ports Serial Server, RS485 and RS232 to Ethernet Convertor, Modbus RTU/TCP Conversion, RS485 and RS232 to RJ45 Convertor, Processor Upgraded

LINOVISION Dual Ports Serial Server, RS485 and RS232 to Ethernet Convertor, Modbus RTU/TCP Conversion, RS485 and RS232 to RJ45 Convertor, Processor Upgraded

The LINOVISION Dual Ports Serial Server connects your RS232 and RS485 devices to Ethernet. This lets you monitor and control them remotely, no matter the distance.

It acts as a Modbus Gateway, converting Modbus RTU to TCP and vice versa. It also supports multi-host polling for up to 16 hosts, making it versatile for various setups.

Industrial-ready design, free cloud service, and a powerful processor ensure reliable performance in tough conditions. Simple to use, built to last.

Pros	Cons
Connect RS232/RS485 devices to Ethernet for remote control. Modbus RTU/TCP conversion for seamless device communication. Free cloud service for up to 30 devices. Upgraded processor ensures fast, reliable performance. Industrial design for tough environments and easy mounting.	No Wi-Fi support, limiting wireless connectivity options. Cloud service limits to 30 devices, extra costs possible. IP30 rating may not suit harsh environments.

Perfect For:

This LINOVISION Dual Ports Serial Server is perfect for anyone who needs to connect RS232 and RS485 devices to Ethernet for remote monitoring and control. It’s ideal for POS systems, agricultural sensors, PLCs, and medical devices that require reliable, efficient performance in industrial settings.

Ready to Purchase?

View Price on Amazon (paid link)

5. Lantronix UD1100001-01 UDS1100 – One Port Serial (RS232/ RS422/ RS485) to IP Ethernet Device Server – UL864, US Domestic 110VAC – Convert from RS-232, RS-485 to Ethernet

Lantronix UD1100001-01 UDS1100 - One Port Serial (RS232/ RS422/ RS485) to IP Ethernet Device Server - UL864, US Domestic 110VAC - Convert from RS-232, RS-485 to Ethernet

Unlock the power of your older equipment with the Lantronix UD1100001-01 UDS1100. This device server makes it incredibly easy to connect any device to your Ethernet network. Get remote management benefits for your existing gear in minutes.

It’s a fast, simple, and cheap way to add network connectivity. This single-port server bridges RS-232, RS-422, or RS-485 to IP Ethernet. It boasts a UL864 compliance and offers flexible mounting options.

Enjoy reliable performance with its 48 MHz processor. Convert serial data to Ethernet effortlessly.

Pros	Cons
Quickly connect any device to Ethernet in minutes. Simple, affordable remote management for non-networked equipment. Versatile mounting options: wall, rail, or standalone. Reliable performance with Lantronix DSTNI-EX processor.	Only one serial port available. No Wi-Fi connectivity for wireless setup. Requires AC power, not battery operated.

Perfect For:

This Lantronix UD1100001-01 UDS1100 is perfect for anyone needing to quickly and easily connect older equipment to a modern Ethernet network. It’s ideal for bringing remote management capabilities to devices that weren’t originally designed for network connectivity, making them accessible and controllable from anywhere.

Ready to Purchase?

View Price on Amazon (paid link)

6. XRIKUI Dual Port PCI Express RS-232 DB9 Serial Port Card for Windows XP, Vista,7, 8.x, 10, 11 32/64bit and Linux PCs, PCIE 2X DB9 Card

Unlock more connections with the XRIKUI Dual Port PCI Express RS-232 DB9 Serial Port Card. This powerful card adds two independent serial ports to your computer, making it easy to link up multiple devices.

It works with Windows and Linux. Just install the drivers for your system. The card uses an advanced chip for fast and reliable data transfer.

You get two bracket options for a perfect fit. It’s a simple upgrade for your PC.

Pros	Cons
Dual ports expand your PC’s connectivity instantly. Wide compatibility with Windows and Linux systems. Advanced chip ensures reliable and fast data transfer. Versatile brackets fit standard and 2U computers easily.	Driver installation required for Windows and Linux, adding extra steps. Low-profile bracket needs manual replacement for 2U computers. Mini-CD may be inconvenient for driver installation.

Perfect For:

This XRIKUI Dual Port PCI Express RS-232 DB9 Serial Port Card is perfect for anyone needing to connect multiple serial devices to their Windows or Linux PC. It’s ideal for expanding connectivity in standard or 2U computers with available PCIe slots.

Ready to Purchase?

View Price on Amazon (paid link)

7. PUSR TCP232-306 RS232 RS485 RS422 to Ethernet TCP IP Modbus Gateway Serial Device Server Serial to ethernet converters

Unlock seamless communication with the PUSR TCP232-306. This gateway effortlessly bridges your serial devices to your network. It’s built for speed and reliability.

Experience powerful performance with its ARM core and optimized TCP/IP stack. This device handles Modbus RTU to Modbus TCP conversion with ease.

Enjoy automatic restarts for uninterrupted operation. Connect RS232, RS485, and RS422 devices with confidence. Get your network connected today!

Pros	Cons
ARM core ensures low latency and strong scalability. Converts Modbus RTU to TCP for seamless integration. Auto-restart feature keeps the device stable and reliable. Supports RS232, RS485, RS422 for flexible connectivity.	No Wi-Fi support, limited connectivity options. Basic interface, lacks advanced configuration tools. No built-in power supply, requires external adapter.

Perfect For:

This product is perfect for anyone who needs to connect serial devices to an Ethernet network. It’s ideal for industrial or commercial use where reliable and stable communication is key.

Ready to Purchase?

View Price on Amazon (paid link)

8. StarTech.com 1-Port Serial to Ethernet Adapter, IP Serial Device Server for Remote RS232 Devices, Wall/DIN Rail, LAN to DB9, TAA

The StarTech.com 1-Port Serial to Ethernet Adapter connects RS232 devices to your network. It works with POS systems, barcode readers, and more. The DB9 port supports speeds up to 921.6Kbps.

It’s easy to manage with unified software and a common Web UI. Works on any OS and lets you set up virtual com ports.

The rugged, all-metal design is durable and ESD-protected. Includes wall/DIN rail mounting and supports 5V power for devices.

Pros	Cons
Connects RS232 devices remotely over an IP network. Unified management for all device servers with common Web UI. Versatile modes for serial tunneling and custom configurations. Rugged, mountable design with ESD protection for harsh environments.	No Wi-Fi support, limiting connectivity options for remote devices. Single port only, restricts expansion for multiple serial devices. Power adapter required, adds bulk and dependency on external power.

Perfect For:

This StarTech.com Serial to Ethernet Adapter is perfect for anyone needing to connect RS232 devices remotely over a network. It’s ideal for POS systems, barcode readers, sensors, and more, offering easy management and rugged durability.

Ready to Purchase?

View Price on Amazon (paid link)

9. Waveshare Industrial Serial Server RS485 to RJ45 Ethernet TCP/IP to Serial Rail-Mount Support with PoE Ethernet Port + Electrical Isolation

The Waveshare Industrial Serial Server is a powerful tool for industrial applications. It connects RS485 devices to Ethernet networks, making data acquisition and IoT integration seamless.

This hardware upgrade supports PoE (Power over Ethernet), ensuring safe and reliable power supply. Its compact, rail-mount design and flame-retardant case make it easy to install in any industrial setting.

Key features include bi-directional data transmission, Modbus and MQTT gateway functions, and RS485 to JSON conversion. It’s ideal for IoT, security, and monitoring applications.

Pros	Cons
PoE support ensures safe, reliable power for industrial use. Multi-function device: serial server, Modbus, MQTT, and more. Compact, rail-mount design for easy installation in tight spaces. Bi-directional data transmission for seamless RS485-Ethernet connectivity.	No Wi-Fi support, limiting wireless connectivity options. Optional PoE function may confuse buyers. Small size might be hard to handle.

Perfect For:

This Waveshare Industrial Serial Server is perfect for industrial environments needing reliable RS485 to Ethernet conversion. It’s ideal for data acquisition, IoT gateways, and intelligent monitoring where safety and ease of installation are key.

Ready to Purchase?

View Price on Amazon (paid link)

10. MOXA NPort 5650-16 – 16 Ports Rackmount Serial Device Server, 10/100 Ethernet, RS-232/422/485, RJ-45 8pin, 15KV ESD

The MOXA NPort 5650-16 is a 16-port serial device server. It connects RS-232/422/485 devices to Ethernet networks. This rackmount unit fits standard 19-inch racks.

It supports TCP server/client, UDP, and Real COM modes. Manage it easily via Telnet, Web, or Windows utility. The LCD panel simplifies IP address setup.

It works with 100-240 VAC or 88-300 VDC power. Also supports ±48 VDC and other low-voltage ranges. SNMP MIB-II ensures smooth network management.

Pros	Cons
16 ports for easy serial-to-Ethernet connection. Rackmount design fits standard 19-inch racks perfectly. Simple setup with LCD panel and web/Telnet tools. Versatile power options for any environment.	No wide-temperature models with LCD panel. Limited Ethernet speed: only 10/100 Mbps. Complex setup for non-tech users.

Perfect For:

The MOXA NPort 5650-16 is perfect for anyone needing to connect multiple serial devices to a network. It’s ideal for IT pros, engineers, or businesses managing RS-232/422/485 devices with 16 ports and easy setup.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Choosing the right serial port server can transform your workflow. Here’s what to consider:

Number of Ports:
Decide how many devices you need to connect. Options range from single-port for simple setups to multi-port for larger systems.
Compatibility:
Ensure the server works with your device’s serial protocol (RS232, RS485, RS422) and network type (Ethernet, Wi-Fi).
Form Factor:
Choose a compact design for tight spaces or a rackmount for organized installations.
Power Options:
Look for PoE support if you need power over Ethernet or flexible power inputs for industrial use.
Ease of Setup:
Opt for servers with web-based configuration, real COM/TTY drivers, or plug-and-play features for quick installation.
Reliability:
Check for industrial-grade builds, ESD protection, and heartbeat mechanisms to ensure stable connections.
Advanced Features:
Consider Modbus conversion, SNMP support, or custom scripting if you need extra functionality.
Budget:
Balance cost with features. Entry-level options are great for basic needs, while premium models offer more versatility.

Ready to unlock the full potential of your devices? Choose a serial port server that fits your needs and enjoy seamless integration today!