Serial to Ethernet Converter RS232 RS485 to TCP/IP - Dual Port Server

Our review of the USRCN Serial to Ethernet Converter finds it best suited for engineers and system integrators who need reliable, transparent serial-over-IP connectivity. The unit combines both RS232 and RS485 ports on a single device server and runs an internal TCP/IP stack, which makes it a practical choice where simple bridging of legacy serial equipment to an Ethernet network is required. Configuration is straightforward, and the adapter's transparent data transmission is the single biggest reason to consider it for Modbus and other serial protocols.

Key Features

• Dual serial ports: Simultaneous RS232 and RS485 support lets the device connect two different serial lines without extra converters, simplifying wiring and installation.
• Transparent transmission: The device server forwards serial data over TCP/IP without altering payloads, preserving protocol timing and content for Modbus and similar systems.
• Integrated TCP/IP stack: Built-in protocol handling reduces dependency on a separate gateway or PC, allowing more direct and stable network integration.
• Compact Cortex-M4 design: The internal Cortex-M4 based solution keeps power and footprint low while delivering the processing needed for serial to Ethernet forwarding.
• DHCP/DNS support: Network features such as DHCP and DNS simplify deployment in dynamic addressing environments and reduce manual network setup.
• Simple configuration: Customers report the adapter is easy to configure, so technicians can get devices on the network quickly with minimal troubleshooting.

Who It's For

This serial device server is aimed at technicians, industrial automation engineers, and IT staff who must connect legacy serial equipment to an Ethernet network without rewriting application software. It is well suited for Modbus RTU devices, remote sensor networks, and legacy machine interfaces that require reliable, transparent data forwarding.

Those who need wide protocol conversion, advanced management dashboards, or integrated cellular backup should look elsewhere; this unit focuses on simple, dependable serial-to-TCP/IP bridging rather than a full-featured industrial gateway platform.

Pros & Cons

Pros

• Supports both RS232 and RS485 simultaneously, removing the need for separate adapters.
• Transparent TCP/IP forwarding preserves serial protocol behavior for applications like Modbus.
• Built-in DHCP and DNS support streamlines network setup in most environments.
• Customers report ease of use and straightforward configuration.

Cons

• Not intended as a full industrial gateway with advanced protocol translation or cellular connectivity.
• Limited to features implied by the internal stack; users needing extensive management tools may require additional software.

Specifications

Product type	Serial Device Server
Serial interfaces	RS232 and RS485 (simultaneous)
Network protocol	TCP/IP with integrated stack
Processor	Cortex-M4 based solution
Network features	DHCP, DNS supported
Use case	Transparent serial to Ethernet data transmission (Modbus support)

Our Verdict

The USRCN Serial to Ethernet Converter is a pragmatic, cost-effective choice for connecting RS232 and RS485 devices to an Ethernet network. It excels where transparent data forwarding and simple network setup are priorities, making it good value for integrators who need reliable Modbus or serial bridging without extra gateway complexity.

Frequently Asked Questions

Can it handle both RS232 and RS485 at the same time?
Yes, the device supports RS232 and RS485 working simultaneously, allowing two serial lines to be bridged to Ethernet at once.

Is configuration difficult for non-experts?
Customers report it is easy to configure, and built-in DHCP/DNS support helps reduce manual network setup for most deployments.

Does it alter serial data or protocol timing?
The unit provides transparent data transmission over TCP/IP, so it forwards serial payloads without modification, suitable for Modbus and similar protocols.