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Serial Ethernet Device Server

Buy an Industrial Serial to Ethernet Converter for Reliable Ethernet Networking (RS232 / RS422 / RS485)

A serial to ethernet converter (also called an industrial ethernet device server) is the fastest way to put legacy serial equipment on a modern IP network. Sollae serial port to ethernet device servers let you monitor, control, and integrate RS232/RS422/RS485 devices over a standard 10/100 Ethernet network — without replacing proven machines or writing custom networking code.

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Why buyers choose Sollae Serial to Ethernet device servers
  • Industrial-grade reliability: wide temperature operation + protection circuits on key models.
  • Flexible modes: serial to TCP, serial to UDP, and serial tunneling for long-distance links.
  • Legacy software friendly: RFC2217 COM-port control + Virtual COM driver (ideal for “COM-based” apps).
  • Security options: SSL/TLS on supported models + MAC/IP filtering for controlled access.
  • Cost-effective modernization: keep your existing devices and upgrade connectivity only where needed.

What RS232 to Ethernet Device Servers Are Used For (Practical Remote Access)

In real projects, teams buy a rs232 to ethernet or RS485 device server to reduce on-site visits and connect “serial-only” devices into IT/OT systems. Typical applications include:

  • Remote monitoring & control of meters, controllers, barcode readers, weigh scales, CNC/PLC-adjacent devices
  • Extending serial links over IP (serial tunneling) when distance or access is a constraint
  • SCADA / dashboards that need continuous data access from serial instruments
  • Remote console / service access for industrial equipment that still relies on RS232/RS485 service ports
  • Multi-site modernization where you standardize device connectivity across branches or plants

Serial to TCP, Serial to UDP: How TCP to Serial / UDP to Serial Works

The reason “serial to tcp” and “serial to udp” dominate commercial searches is simple: most software and controllers talk IP. A Sollae device server bridges the gap by mapping your serial data stream into IP packets, using common operating modes such as:

Common modes
  • TCP Server (serial to TCP): your application connects to the device server (stable, most common choice).
  • TCP Client (TCP to serial): the device server initiates the connection to your host/server.
  • UDP Mode (serial to UDP / UDP to serial): low overhead datagrams for simple telemetry and broadcast-style use.
  • Serial tunneling: pair two devices to create an “extended serial cable” over Ethernet/WAN.
  • Virtual COM (RFC2217): present a remote serial port as a local COM port for legacy Windows software.

Choose the Right Industrial Ethernet Device Server (Model Comparison)

Model Ports / Interface Key strengths Best for
RS232 to Ethernet Converter
CSE-H53N 		1 × RS232 (DB9M)
10/100 Ethernet 		IPv4/IPv6, SSL, MAC/IP filtering, Virtual COM (ezVSP), serial tunneling, packet fragmentation separator Single legacy device modernization, PLC/service ports, meters, RS232 instruments
RS422/RS485 to Ethernet Converter
CSE-H55N2 		1 × RS422/RS485 (terminal block)
10/100 Ethernet 		Noise-resistant industrial design, IPv4/IPv6, SSL, MAC/IP filtering, Virtual COM (ezVSP), TCP/UDP modes RS485 field devices, noisy industrial environments, long-run serial networks needing IP access
2-Port RS232 Industrial Device Server
CSE-H21 		2 × RS232 (DB9M)
10/100 Ethernet 		Electrically isolated ports + surge protection, SSL/SSH options, Virtual COM, TCP/UDP modes Two serial devices per cabinet, noisy plants, sites that need extra isolation and robustness
4-Port Serial Ethernet / WLAN Device Server
CSC-H64 		4 × RS232/RS422/RS485 (DB9M)
Ethernet + WLAN via USB dongle 		Soft AP for quick Wi-Fi setup, WPA Enterprise options, IPv4/IPv6, Virtual COM, packet fragmentation delimiter Multi-device serial aggregation, mixed interface environments, locations where Wi-Fi setup is required

Security & Reliability for Industrial Ethernet Networking (What Buyers Compare)

Competitor pages that rank well usually emphasize three things: industrial durability, TCP/UDP mode flexibility, and secure access. Sollae matches that purchase checklist with practical features that reduce operational risk:

  • Industrial temperature ranges (up to -40°C to +85°C on key models) for cabinets and field environments
  • Protection circuits for over-voltage / reverse-voltage / over-current on key models
  • Isolation & surge protection options where noise immunity matters
  • SSL/TLS and MAC/IP filtering on supported units for controlled remote access
  • IPv4/IPv6 dual stack for modern network compatibility

Why Sollae Is a Smarter Buy Than Overpriced “Enterprise” Device Servers

If you’re comparing “premium” industrial brands, the hidden cost is often complexity: extra licensing, more setup time, or features you don’t actually need. Sollae focuses on what makes a serial to ethernet deployment successful: stable conversion, flexible operating modes, and tools that speed up rollout.

  • Cost-effective modernization for B2B deployments and multi-site rollouts
  • Fast commissioning via web/config tools + Virtual COM driver support
  • Right-sized range: 1-port, 2-port, and 4-port options depending on your cabinet density

Serial to Ethernet Converter Buyer Checklist (Before You Order)

  • Interface: RS232 (CSE-H53N / CSE-H21) vs RS485/RS422 (CSE-H55N2) vs mixed ports (CSC-H64).
  • Mode required: serial to TCP (TCP server/client), serial to UDP, or serial tunneling (pair devices).
  • Legacy software: need a “COM port” on Windows? prioritize RFC2217 + Virtual COM support.
  • Environment: for noisy plants, choose isolation/surge protection and industrial operating ranges.
  • Security: if the device is reachable beyond a protected LAN, prioritize SSL/TLS + filtering and lock down access.

Ready to modernize? Choose your industrial ethernet device server above — or start with a simple rs232 to ethernet converter (CSE-H53N) if you want the fastest “plug legacy into IP” upgrade.

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