The Ethernet Serial Converter: Key to Serial Management Infrastructure


Computer and communication systems are evolving rapidly, but many infrastructures continue to rely on serial equipment for control and monitoring. Ethernet serial converters, also known as serial terminal servers and serial device servers, play a crucial role in facilitating the integration of this serial equipment into modern Ethernet networks.

In this blog, we will explore in detail Ethernet serial converters and their benefits for serial management infrastructure.

You will also learn about Digi serial solutions that meet the needs of industrial and logistics use cases, as well as education, hospitality and more.

What Is an Ethernet Serial Converter?

An Ethernet serial converter, or serial terminal server, is a device that allows mission-critical serial devices and equipment such as sensors, control panels, PLCs, precision machinery, as well as network infrastructure like routers and switches, to connect to an Ethernet network. These serial devices typically use serial ports (RS-232, RS-485, RS-422) for communication. Ethernet serial converters act as bridges by converting serial signals into Ethernet signals, enabling remote monitoring and control of these devices over the network.

Supply chain use case

Advantages of Ethernet Serial Converters

Ethernet serial converters offer a wide range of benefits in infrastructure management applications:

  1. Easy integration into an Ethernet network: Ethernet serial converters greatly simplify the integration of serial equipment into an Ethernet network. They eliminate the need for direct serial connections to each device, reducing costs and associated complications.
  2. Remote access: With Ethernet serial converters, system administrators can access serial equipment remotely, essential for monitoring, maintenance, and configuration of devices in remote locations.
  3. Time and cost savings: Remote management reduces on-site visits, saving time and money. Maintenance, configuration, and troubleshooting operations can be performed without the need to be physically present.
  4. Enhanced security: Ethernet serial converters offer advanced security features to protect both serial and Ethernet connections. Encryption and authentication protocols ensure that only authorized users have access to the equipment.
  5. Flexibility and scalability: Ethernet serial converters are available in various configurations to meet the specific needs of each infrastructure. They can be deployed in networks of any size, offering great flexibility and scalability.

Digi Serial Connectivity Products

Digi Connect EZ family

Digi International is a leading manufacturer of Ethernet serial converters, offering a wide range of products to meet diverse business needs. Among their products is the click-to-connect solution for critical serial applications.

Digi Connect EZ Mini/2/4: This click-to-connect solution is ideal for critical serial applications requiring only 1-4 serial ports. Wi-Fi and cellular capabilities are available with Digi Connect EZ 4.

Digi Connect EZ 8: Offering 8 serial RS-232 or RS-232/422/485 software selectable ports to connect to a wide variety of serial equipment over IP networks. Includes Wi-Fi and cellular capabilities.

Digi Connect EZ 16/32: 16 or 32 serial RS-232 or RS-232/422/485 software selectable ports to connect applications requiring COM ports, serial tunneling or TCP/UDP sockets. Includes cellular capabilities.


Ethernet serial converters, or serial terminal servers, are essential tools for businesses and organizations that rely on serial equipment for their operations. They simplify integration, enable remote access, improve security, and offer significant time and cost savings. Digi International's serial connectivity products are a top choice solution to meet these needs.

In summary, Ethernet serial converters are a centerpiece of serial management infrastructure, facilitating the transition of serial equipment to modern Ethernet networks. They ensure reliable and secure communication, enhancing the efficiency and management of serial systems.

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