---
product_id: 400508560
title: "4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540"
brand: "horsebiz"
price: "37458CFA"
currency: XOF
in_stock: false
reviews_count: 5
url: https://www.desertcart.sn/products/400508560-4-ports-serial-device-server-rs232-rs485-rs422-to-ethernet
store_origin: SN
region: Senegal
---

# Cortex-M4 high-speed ARM processor 4 independent serial ports (RS232/485/422) + Ethernet Industrial temperature range for harsh environments 4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540

**Brand:** horsebiz
**Price:** 37458CFA
**Availability:** ❌ Out of Stock

## Summary

> 🌐 Connect Smarter, Work Faster — The Serial Server for the Modern Pro

## Quick Answers

- **What is this?** 4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540 by horsebiz
- **How much does it cost?** 37458CFA with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/400508560-4-ports-serial-device-server-rs232-rs485-rs422-to-ethernet)

## Best For

- horsebiz enthusiasts

## Why This Product

- Trusted horsebiz brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile TCP/IP Protocol Stack:** Built-in TCP Server/Client, UDP Server/Client, HTTPD Client modes plus Modbus RTU to TCP support for diverse industrial applications.
- • **Plug & Play Ethernet Integration:** Auto-MDI/MDIX RJ45 port with 10/100Mbps speeds for effortless network setup and blazing data transfer.
- • **Robust Industrial-Grade Reliability:** Operates flawlessly across extreme temperatures, ensuring uptime in any environment.
- • **Seamless Multi-Protocol Connectivity:** Supports RS232, RS485, RS422 with simultaneous 4-port operation for ultimate device networking flexibility.
- • **Developer-Friendly with Virtual COM & SDK:** Includes USR-VCOM software and TCP/IP socket programming examples for Windows, Android, iOS — empowering rapid integration and customization.

## Overview

The USR-N540 is a compact, industrial-grade 4-port serial device server that bridges RS232/RS485/RS422 devices to Ethernet networks with high-speed Cortex-M4 processing. Designed for demanding environments, it supports multiple TCP/IP modes, virtual COM ports, and Modbus protocols, enabling seamless, reliable, and scalable device networking for professional and industrial applications.

## Description

USR-N540, a four serial device server, can realize transparent transmission between TCP/UDP data package and RS232/RS485/RS422 interface. USR-N540, based on ARM processor, is of low power, rapid speed and high stability. And N540 is internally integrated with TCP/IP protocol. User can easily realize embedded device networking.

Review: Great device. These work really well for serial devices. It takes a little time to understand the nomenclature, but it is set up very well. Can easily connect up to 4 serial devices via 232, 485, etc. Thank you!
Review: Aunque viene sin instrucciones, se pueden encontrar fácilmente en internet. Funciona muy bien, tiene servidores TCP/UDP para cada puerto serie, es fácil de configurar y de usar. Se puede encontrar Sw que te instala los puertos serie remotos como puertos locales, probado con aplicaciones como teraterm, moba, en incluso para depuracion con eclipse. La única pega es que viene con enchufe inglés y necesite un adaptador

## Features

- Cortex-M4 kernel,industrial working temperature range and TCPIP protocol stack.
- Auto-MDI/MDIX,RJ45 port with 10/100Mbps
- TCP Server,TCP Client,UDP Client,UDP Server and HTTPD Client work mode
- Four ports can work independently at the same time
- Can distinguish which serial port connects to the device via port number
- Support virtual serial port and provide corresponding software USR-VCOM
- Serial baud rate from 600bps to 230.4K bps
- DNS and DHCP supported
- Provide PC TCP/IP socket programming example such as VB,C++,Delphi,Android and IOS
- Built-in webpage;also can customize webpage for users
- Support Modbus RTU to Modbus TCP
- Support UDP broadcast function

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07KWYC1W9 |
| Are Batteries Included | No |
| Brand | Horsebiz |
| Customer Reviews | 4.3 4.3 out of 5 stars (10) |
| Date First Available | 22 March 2016 |
| Item Dimensions LxWxH | 9 x 8.4 x 2.5 Centimeters |
| Item Height | 25 Millimeters |
| Item Weight | 1 kg 250 g |
| Item Width | 8.4 Centimeters |
| Item model number | N540 |
| Manufacturer | USR IOT |
| Net Quantity | 1 Count |
| Product Dimensions | 9 x 8.4 x 2.5 cm; 1.25 kg |

## Product Details

- **Brand:** Horsebiz
- **Compatible Devices:** Embedded Devices with RS232/RS485/RS422 Interfaces
- **Connector Type:** USB
- **Item dimensions L x W x H:** 9 x 8.4 x 2.5 Centimeters
- **Specific Uses For Product:** Networking Embedded Devices, Industrial Automation, IoT Devices, Legacy Systems

## Images

![4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540 - Image 1](https://m.media-amazon.com/images/I/41EJFzKgNNL.jpg)
![4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540 - Image 2](https://m.media-amazon.com/images/I/41GUOtmwiUL.jpg)
![4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540 - Image 3](https://m.media-amazon.com/images/I/41vRbbO4ECL.jpg)
![4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540 - Image 4](https://m.media-amazon.com/images/I/516ucKEl4sL.jpg)
![4 ports Serial Device Server RS232 RS485 RS422 to Ethernet Converter - USR-N540 - Image 5](https://m.media-amazon.com/images/I/51ErCLL0vUL.jpg)

## Questions & Answers

**Q: Does it have a filter to ignore lines of data?**
A: This Serial Device Server itself only supports transparent transmission, so it does not support filter data. Application software shall help to manage this.

**Q: Does it work with linux?**
A: Sorry it can not work with Linux.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***H on 7 January 2020*

Great device. These work really well for serial devices. It takes a little time to understand the nomenclature, but it is set up very well. Can easily connect up to 4 serial devices via 232, 485, etc. Thank you!

### ⭐⭐⭐⭐⭐ Review
*by S***F on 26 April 2020*

Aunque viene sin instrucciones, se pueden encontrar fácilmente en internet. Funciona muy bien, tiene servidores TCP/UDP para cada puerto serie, es fácil de configurar y de usar. Se puede encontrar Sw que te instala los puertos serie remotos como puertos locales, probado con aplicaciones como teraterm, moba, en incluso para depuracion con eclipse. La única pega es que viene con enchufe inglés y necesite un adaptador

### ⭐⭐ Review
*by R***I on 14 December 2019*

It's works fine when it works. However after some time one can't telnet to serial port. It becomes unresponsive. One cans till ping to main IP address. Power cycling fixes it but it ends up in same state after some time. Hardware wise it's well designed and built product and very economical in comparison to MOXA but software is buggy. Returned.

## Frequently Bought Together

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-27*