Chengdu Ebyte Electronic Technology Co.,Ltd
NB124S_User Manual
Copyright ©2012–2023
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Chengdu Ebyte Electronic Technology Co.,Ltd
Chapter 1 Product Introduction
NB124S is a 2-way serial port server. It integrates the TCP/IP protocol stack inside, which can realize data
transparent transmission from the 2-way serial port to the Ethernet port. The device has the function of ModBus
gateway, supports Modbus TCP to RTU, and supports automatic polling. The product adopts industrial-grade
standard design to ensure the stability of the equipment in harsh working environments, and the rich indicator lights
are used to feedback the different working states of the equipment.
1.1 Functions and Features
Stable and reliable industrial design, high-level port protection;
Abundant LED status indicators to quickly locate the working status of the device;
Support Phoenix terminal or DC power supply, DC 8-28V wide voltage input, support reverse connection
protection;
Support terminal interface (RS485/RS422) and standard DB9 interface (RS232);
The baud rate supports 2400~115200bps, and supports multiple verification methods;
Support multiple registration packets and heartbeat packet sending, such as connection sending MAC,
connection sending customization, etc.;
Supports stable and reliable host computer and AT command configuration, independent configuration of four
channels does not affect each other;
Support DNS domain name resolution, domain name resolution server can be configured;
Support DHCP to dynamically obtain IP, subnet mask, default gateway, DNS server address;
Support multiple working modes TCP client, TCP server, UDP client, UDP server, MQTT client, HTTP client;
The 2-way server mode can be turned on at the same time, supporting 14 clients to dynamically allocate and
access, and a single server supports 15 clients to access;
Support UDP server mode with memory mode, records the UDP address of the last communication, and uses it
as the destination address of the next communication;
Support a variety of Modbus gateways, which can realize the active reporting of RTU devices, support the
mutual conversion of Modbus TCP and Modbus RTU protocols, and can be configured as a storage mode to
automatically collect device data, or use a multi-host mode with one question and one answer;
Support MQTT gateway function, fast access to Alibaba Cloud and standard MQTT3.1.1 servers (OneNET,
Baidu Cloud, Huawei Cloud, etc.);
Support Modbus data to actively report to TCP transparent transmission server, MQTT server and other
servers;
Support HTTP client mode, use HTTP/1.1 protocol, can be configured as GET, POST two request methods;
Support TCP/IP direct communication or connect communication through "virtual serial port";
Abundant independent LED status indicators, supporting links, network cables, data sending and receiving,
etc.;
Support the host computer to perform firmware upgrade or firmware switch through UDP or serial port;
