Difference between USR-N540 and USR-N540-H7-4Y

USR-N540: 4-port Serial to IP Converters. USR IOT's serial to IP Converters USR-N540 can realize bi-directional transparent transmission between RS232/RS485/RS422 and network

USR-N540-H7-4Y: 4-port RS485 to ethernet Converters. USR IOT's RS485 to ethernet Converters USR-N540 can realize bi-directional transparent transmission between RS485 and network

Introduction
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.

Feature 
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
The Global Unique MAC Address Bought From IEEE (Begin With D8-B0-4C);User Can Define MAC Address
Support Modbus RTU To Modbus TCP
Support UDP Broadcast Function
Four Serial Ports;Each Serial Can Work As Rs232,Rs485 Or Rs422;DB9 Female;Provide Rs485/Rs422 Converter
Four Channel Serial Communication Indicator: TX/RX
Support DC Adapter And 5.08-2 Terminal Power Supply
Reload Button,One Key To Restore Default Settings
RJ45 With Link/Data Indicator Light,Built-In Isolation Transformer And 2 KV Electromagnetic Isolation

Application Field
Industrial Data Transmission, Industrial Automation
Security And Protection Monitoring, Public Security
Smart Home, Power Control, Environmental Monitoring, Intelligent Agriculture
Door Check On Work Attendance System, POS System, Rice Selling System
Building Automation System, Power Monitoring, Self-Service Banking System, Telecom Machine Room Monitoring

Serial Port of  Serial Ethernet Converter (Default Port: RS232 DB9 male port)

Data information for USR-N540-H7-4Y as following:

Comparison of new and old schemes

Basic Function-transmission

Scheme upgrade to provide better experience

Master chip adopts ST crotex-M7 core, the main frequency is up to 400Mhz,
fast processing speed, high stable and reliable performance

Multiple hardware protection

Redundant Power Supply

Wide input voltage DC 5-36V,with reverse polarity protection

Block Diagram

Work mode

TCP Server

The server listens to the specified port and waits for the TCP client to connect,
The data sent by the serial device will be transparently transmitted to all
successfully connected clients through the serial device server.

TCP Client

The serial device server initiates a TCP connection to the specified IP address.
If the connection fails, the serial server will continue to try to reconnect until it succeeds.
If the connection is successful, the server can transparently transmit data with
the serial device in two-way.

UDP mode

The serial device server sends the data of
the serial device to the designated IP network device.
The serial device server monitors the port meanwhile and
forwards all received data to the serial device.

HTTPD Client

Serial port data can be submitted to a specified server by GET or POST method

More features

Modbus gateway

Support modbus RTU and modbus TCP protocol conversion
Support modbus multi-host polling

Virtual Com Software

Product Details

Dimensions :222*122*29 mm
（L*W*H , Including terminals and mounting ears）

Application case

Charging pile application case

N540 can connect the charging pile to the charging intelligent service platform to
realize two-way data transmission between the charging device and the platform.
The billing information and power usage can be viewed remotely through the
platform to facilitate operation and maintenance.

Industrial automation application case

The application of N540 in traditional industrial scenarios can
effectively solve the problem that workers need to monitor equipment on-site,
save labor costs, and increase production efficiency and safety factors.
Data management makes the production process control more refined.