NE2-D11A single serial port server is used to realize bidirectional transparent transmission of data from RS485 serial port to Ethernet port. It has multiple Modbus gateway modes and MQTTC/HTTPC IoT gateway modes, which can meet the networking functions of various serial port devices/PLCs; it adopts industrial-grade design standards to ensure equipment reliability. The serial port server realizes transparent transmission of serial port data to Ethernet TCP/IP data packets. Users do not need to care about the specific details, and the protocol conversion is completed inside the device.
| Parameter Item |
Specifications |
| Model |
NE2-D11A |
| Serial Interface |
RS485 |
| Main Function |
RS485 <-> Ethernet Bidirectional Transparent Transmission |
| Supported Network Protocols |
TCP, UDP, MQTT, HTTP |
| Gateway Modes |
Multiple Modbus Gateway & IoT Client Modes |
| Power Input |
AC 85V ~ 265V |
| Installation Type |
DIN Rail Mount |
| Dimension |
110mm * 66mm * 30mm |
| Design Standard |
Industrial Grade |
| project |
illustrate |
| 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 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. Factory Workshop PLC Remote Network Monitoring
The NE2-D11A connects RS485-type on-site PLCs to factory LAN. It converts serial data into Ethernet TCP/IP packets to realize remote program downloading and real-time equipment status monitoring. DIN rail installation fits standard electrical cabinets, and wide AC voltage input adapts unstable power environment inside industrial plants.
2. Building Automation & Intelligent Building Sensor Networking
It connects RS485 air conditioning controllers, water meters and environmental sensors inside buildings. With built-in Modbus gateway function, it uploads all device data to building central SCADA system. Users do not need secondary programming for protocol conversion.
3. Distributed Energy Station Remote Meter Reading System
Multiple RS485 multifunctional power meters access this serial port server. The device uses MQTT client mode to push electricity consumption data to cloud IoT platforms. It supports AC direct power supply, eliminating the need for extra DC power adapters inside power distribution cabinets.
4. Intelligent Agricultural Greenhouse Centralized Data Collection
Greenhouse temperature, humidity and CO2 sensors with RS485 output connect to NE2-D11A. Serial data is transmitted to local server via Ethernet. The transparent transmission mode ensures original sensor data without loss for automatic greenhouse control logic.
FAQ Section
1. Can NE2-D11A work directly with cloud IoT platforms?
Yes. The serial port server integrates MQTTC and HTTPC client modes. It can actively push collected serial device data to most mainstream cloud IoT platforms without additional gateway equipment.
2. Is this serial server compatible with standard Modbus RTU devices?
It supports multiple built-in Modbus gateway modes. It can complete mutual conversion between Modbus RTU over serial port and Modbus TCP over Ethernet, which fits most industrial Modbus sensors and controllers.
3. Does NE2-D11A need an external DC power adapter?
No. The device supports AC 85V ~ 265V alternating current input. It can be directly connected to commercial mains power inside electrical cabinets to simplify on-site wiring.
4. Can multiple RS485 slave devices be connected to one NE2-D11A?
It adopts standard RS485 bus, supporting multiple slave nodes on the same bus. The actual maximum quantity depends on communication baud rate, cable length and on-site electromagnetic interference environment.
