USR N540 Four-Port Serial Server User Manual

This manual covers the installation, configuration, and usage of the USR-N540 four-port serial server for transparent data transmission between…

Brand: Usr
Document type: User Manual
Language: Chinese
Pages: 47
File format: PDF
File size: 3.8 MB
Published: 17 October, 2026
Updated: 17 October, 2026
MD5 checksum: BF39378D8A0C596CF4526A8CDE36BEDB
PDF: USR N540 Four-Port Serial Server User Manual PDF

About this manual

The USR-N540 is a four-port serial server designed to achieve bidirectional transparent transmission between serial ports (RS232, RS485, RS422) and an Ethernet port. It features an ARM core processor and supports various network protocols including TCP/IP, UDP, HTTPDClient, and WebSocket. This manual is written in Chinese.

What's inside

Quick Start
Product Overview
Hardware Parameters
Network Basic Functions
Socket Function
Serial Port Function
Feature Functions
Parameter Settings
AT Command Configuration

Specifications

Working Voltage	DC5～36V
Network Port Speed	10/100Mbps
Serial Baud Rate Range	600-230.4Kbps
Number of Serial Ports	Four ports
Operating Temperature	-40～85℃

Frequently asked questions

What are the default login credentials for USR-N540?

The default username is 'admin' and the password is also 'admin'.

Does the device support DHCP?

Yes, it supports static IP addresses or automatic acquisition via DHCP.

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