The Ebyte NE2-D12P is an industrial-grade, isolated RS232-to-Ethernet serial server designed for seamless bidirectional transparent data transmission, featuring support for a wide 8-28V DC voltage range, multi-protocol integration including TCP/UDP, MQTT, HTTP, and Modbus gateway modes, and a robust guide-rail mountable design for reliable integration into diverse industrial automation and PLC networking architectures.
| Parameter | Specification |
|---|---|
| Serial Interface | RS232 |
| Operating Voltage | 8 to 28V DC |
| Network Protocols | TCP, UDP, MQTT, HTTP, IPv4, DHCP, DNS |
| Mounting Method | Guide rail and positioning hole |
| Dimensions | 80 x 28 x 27 mm |
| Protocol Conversion | Transparent Transmission / Modbus Gateway |
| Project | illustration |
| working mode | TCP Server(default)、TCP Client、UDP Server、UDP Client、HTTP Client、MQTT Client |
| Socket connection | TCP server supports 5 client connections |
| network protocol | TCP/UDP、MQTT、HTTP、IPv4、DHCP、DNS |
| How to obtain IP | Static IP (default), DHCP |
| DNS domain name resolution | support |
| Domain name resolution server | 114.114.114.114 (customizable) |
| Configuration method | Web page, parameter configuration tool, AT command |
| IP address | 192.168.3.7 (customizable) |
| username | admin (customizable) |
| password | admin (customizable) |
| local port | 8886 (customizable) |
| subnet mask | 255.255.255.0 (customizable) |
| gateway | 192.168.3.1 (customizable) |
| Serial buffer | 10kByte or 1024 packets |
| Packaging mechanism | Maximum 1024Byte, 1~80 bytes idle time |
| Serial port baud rate | 600~460800 bps (default 115200) |
| data bits | 5, 6, 7, 8 (default) |
| Stop bit | 1 (default), 1.5, 2 |
| Check digit | None (default), Odd, Even |
| Working temperature and humidity | -40～+85℃, 5%～95%RH (no condensation) |
| Storage temperature and humidity | -40 ~ +105℃, 5% ~ 95%RH (no condensation) |
| Protection level | Industrial EMC Level 3 |
| Isolation voltage | 1.5KV (only supported by isolated version) |
| Electrostatic protection | Contact 4KV, air 8KV |
| burst | Differential mode 1KV, common mode 2KV |
Practical Application Scenarios
1. Industrial PLC Networking for Factory Floor
The NE2-D12P serves as a critical bridge for connecting legacy RS232-based PLCs to modern Ethernet-based management networks. By converting serial data into TCP/IP packets, the module enables centralized data collection and remote programming of factory automation equipment, reducing the need for technicians to manually interface with machines on the shop floor.
2. Remote SCADA Data Acquisition
In utility sectors such as water treatment or oil pipelines, the module integrates serial RTUs into distributed SCADA systems. The industrial-grade isolated design ensures stable operation in environments with high electrical noise, allowing operators to monitor equipment status and performance metrics across geographically dispersed facilities from a central control room via Ethernet.
3. Automated Building Management Systems (BMS)
The device is widely deployed in building automation to integrate serial-based HVAC controllers and lighting control panels into a unified Ethernet network. Using its support for MQTT and HTTP, building operators can push real-time environmental data to web-based dashboards or cloud-managed energy platforms to optimize operational efficiency and reduce energy consumption.
FAQ Section
1. What does the "isolated serial port" feature provide?
The isolated RS232 port offers galvanic isolation between the serial device and the Ethernet network. This is critical in industrial environments to prevent damage from ground loops, electrical surges, and high-frequency interference commonly found in heavy machinery, thereby significantly extending the service life of both the server and the connected serial devices.
2. Can the NE2-D12P be used to connect devices directly to cloud platforms?
Yes. The module supports MQTT and HTTP gateway modes, which are standard protocols for IoT cloud services. You can configure the module to act as an edge data producer, pushing structured serial data directly to your MQTT broker or cloud-based RESTful API without requiring an intermediate PC or gateway server.
3. How do I configure the device for specific Modbus mapping?
The module features a built-in web-based interface for easy configuration. You can select "Modbus Gateway" mode and define the mapping between your RS232 serial Modbus RTU devices and the Ethernet-side Modbus TCP protocol. This internal protocol conversion happens automatically once configured, ensuring the host network sees your devices as standard Modbus TCP nodes.
