Enabling Edge-Device Connectivity in the IIoT Era
Widely supports connecting the IoT platform with
stardard MQTT protocol


Model name



1 RS232/485/422 to Ethernet device server


1 RS485 to Ethernet device server


2 RS232/485/422 to Ethernet device server


2 RS232/485 to Ethernet device server


4 RS232/485/422 to Ethernet device server


4 RS485 to Ethernet device server


8 RS485 to Ethernet device server


Data Transmission Encryption

Supports SSL/TLS encryption in TCP client,
HTTP client and MQTT operation modes,
supports two-way certificates authentication.

PUSR Cloud Management

Easy to achieve edge computing, pair connection, remote operation and maintenance.

Modbus Gateway

ETransfer between Modbus RTU and Modbus TCP protocol,
support Modbus multi-host polling.
Support up to 128 data points for data collection and Modbus address mapping.

Scheme comparison

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.

Product Details

150*98.8*30 mm(L*W*H, including terminals and mounting ears).

Application Case

Charging Pile Application Case

N520 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 N520 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
he production process control more refined.