TRENDnet TU-S9E Serial to IP Ethernet Converter
Overview :
The TRENDnet TU-S9E is a 1-Port Serial to IP Ethernet Converter designed to integrate legacy RS-232 serial devices into a modern IP-based network. It serves a critical function for IT and operational technology teams that need to manage, monitor, and access serial equipment such as industrial sensors, PLCs, scanners, and access control systems from a central location or remotely. By converting serial data to Ethernet packets, this device eliminates the distance and connectivity limitations inherent in direct serial connections, providing reliable network access to critical infrastructure. This converter addresses the challenge of modernizing infrastructure without replacing functional but isolated serial-based hardware. It supports a virtual COM port mode, allowing existing software applications to communicate with the networked serial device as if it were still physically connected to a local serial port. This seamless integration simplifies network architecture and reduces the need for dedicated PCs or complex wiring schemes, offering a cost-effective pathway for extending the life and utility of valuable legacy equipment. Built for durability and ease of deployment, the TU-S9E features a rugged metal housing suitable for harsh industrial environments and a compact form factor ideal for space-constrained installations like server cabinets or control panels. Management is straightforward via an included software utility or a standard web browser, providing administrators with the tools to configure network settings and control serial port parameters. This combination of robust design and simple management makes it a practical solution for enabling remote access and control over essential serial devices.
Key Features
- Remotely manage an RS-232 serial device over the LAN.
- Supports virtual serial port, DHCP server, and TFTP.
- Rugged, durable metal housing for industrial settings.
- Simple setup using the included software or web browser.
- Compact, wall-mountable design for flexible installation.


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