The Ebyte NA611 series (NA611 / NA611-A / NA611-S / E103-W02DTU) is an industrial WiFi to serial device server supporting 2.4GHz & 5.8GHz dual-band 802.11a/b/g/n, transparent RS485/RS232 conversion, standard MQTT/HTTP/TCP/UDP protocols, wide DC 8~28V or AC 85~265V power, 35mm DIN-rail mounting, and conformal coating for industrial IoT automation and PLC remote wireless monitoring.
Key Features & Advantages
- 2.4GHz & 5.8GHz Dual-Band WiFi Wireless Connectivity: NA611 / NA611-A models support both 2.4GHz and 5.8GHz dual-band IEEE 802.11a/b/g/n standards, providing high-speed, anti-interference data transmission in congested industrial RF environments.
- Multi-Cloud & Standard IoT Protocol Compatibility: Supports standard MQTT, HTTP Client, TCP Server/Client, and UDP modes, with out-of-the-box one-click integration for Alibaba Cloud, Baidu Cloud, and OneNET IoT platforms.
- Flexible Multi-Socket Connections & Modbus Gateway: Supports up to 4 simultaneous independent Socket connections and Modbus RTU/TCP protocol conversion, enabling multi-host SCADA polling and cloud telemetry synchronization.
- Rugged Industrial Design & Wide Power Options: Built with 35mm DIN-rail mounting, military-grade conformal coating (anti-mold, anti-moisture, anti-salt spray), SMA-K external antenna interface, and flexible power choices including wide DC 8~28V or direct AC 85~265V mains power (NA611-A).
Core Specifications
| Parameter | Specification / Value |
|---|---|
| Wireless Standard | NA611 / NA611-A: 802.11 a/b/g/n (2.4G & 5.8G) | NA611-S / E103-W02DTU: 802.11 b/g/n (2.4G) |
| Operating Frequency Band | 2.412 ~ 2.472 GHz & 5.180 ~ 5.825 GHz (Dual Band on NA611/A) |
| Serial Interface | NA611 series: RS485 (5.08mm Pluggable Terminals) | E103-W02DTU: RS232 (DB9) & RS485 |
| Serial Baud Rate | 300 ~ 460800 bps (Customizable Baud Rate & Parity: None / Odd / Even) |
| Network Protocols & Sockets | TCP Server, TCP Client, UDP, DHCP, DNS, MQTT, HTTP Client; Up to 4 Sockets |
| WiFi Working Modes & Security | AP / STA / AP+STA / P2P Modes; WEP / WPA-PSK / WPA2-PSK Encryption |
| Operating Voltage | DC 8 ~ 28V (NA611, NA611-S, E103-W02DTU) | AC 85 ~ 265V Wide Mains Power (NA611-A) |
| Antenna Interface | SMA-K (50 Ohm Characteristic Impedance) |
| Environmental Protection | Conformal Coating (Anti-Mold, Anti-Moisture, Anti-Salt Spray), -40 to +85 deg C |
| Mounting Method | Standard 35mm DIN-Rail Mount and Screw Hole Mount |
Product Selection Guide
Notice for Selection: Choose NA611 for DC 8~28V dual-band 2.4G/5.8G industrial installations; choose NA611-A for direct AC 85~265V high-voltage mains power without external power supplies; choose NA611-S for cost-effective 2.4G multi-socket cloud gateway applications; or choose E103-W02DTU for legacy RS232 DB9 and RS485 dual-serial integration.
| Model SKU | WiFi Frequency Band | Serial Interface | Operating Voltage | Protocols & Sockets | Dimensions & Weight |
|---|---|---|---|---|---|
| NA611 | 2.4GHz & 5.8GHz Dual Band | RS485 | DC 8 ~ 28V | TCP/UDP/MQTT/HTTP | 92 * 66 * 30 mm (139 +/- 5 g) |
| NA611-A | 2.4GHz & 5.8GHz Dual Band | RS485 | AC 85 ~ 265V Mains | TCP/UDP/MQTT/HTTP | 92 * 66 * 30 mm (139 +/- 5 g) |
| NA611-S | 2.4GHz Single Band | RS485 | DC 8 ~ 28V | 4-Way Sockets, MQTT/Cloud | 92 * 66 * 30 mm (134 +/- 5 g) |
| E103-W02DTU | 2.4GHz Single Band (CC3200) | RS232 (DB9) + RS485 | DC 8 ~ 28V | Transparent TCP/UDP | 82 * 62 * 25 mm (160 g) |
Industrial Installation & Wiring
The NA611 series is engineered in a flame-retardant industrial ABS casing with standard 35mm DIN-rail clips and screw mounting holes. The top panel features an SMA-K RF connector for external 2.4G/5.8G high-gain rubber duck or magnetic whip antennas. Industrial 5.08mm pluggable screw terminals provide robust electrical connections: wire serial data to RS485-A and RS485-B terminals. For DC models (NA611, NA611-S, E103-W02DTU), connect DC 8~28V power to V+ and V- terminals. For AC models (NA611-A), connect AC 85~265V live (L) and neutral (N) wires directly. Five diagnostic LEDs provide clear real-time monitoring: PWR (Power), STATE (Fault/Status), DATA (Serial/WiFi RX/TX), LINKA (WiFi Connection Status), and LINKB (Server Cloud Connection Status).
Practical Application Scenarios
1. Factory Floor CNC Machine Tool & PLC Wireless SCADA Networking
In manufacturing workshops where running Ethernet cabling across machine shop floors is difficult and expensive, installing the NA611 dual-band WiFi serial server on CNC controllers, Siemens S7-200/1200 PLCs, and touchscreens allows instant wireless integration into the plant 5.8GHz high-speed Wi-Fi network, eliminating 2.4GHz co-channel interference and providing stable SCADA telemetry.
2. Smart Photovoltaic Inverter & Battery Storage (BESS) Wireless Monitoring
Solar solar farms and distributed energy storage cabinets utilize RS485 Modbus RTU strings to monitor power generation and battery state-of-charge. Deploying the NA611-S with 4-way Sockets enables simultaneous local HMI telemetry and remote cloud platform synchronization over MQTT, ensuring continuous inverter telemetry without physical trenching.
3. Agricultural Greenhouse Environmental Sensing & Automated Valve Control
In large-scale smart agricultural greenhouses, RS485 soil moisture sensors, weather stations, and irrigation pump controllers are widely dispersed. Utilizing the Ebyte NA611 series in Station (STA) mode bridges all Modbus RTU sensors back to the central environmental controller over wireless Wi-Fi, dramatically reducing field installation labor.
4. Commercial Building HVAC & Smart Energy Submetering
Retrofitting energy submeters and chiller unit controllers in commercial buildings frequently encounters physical cable routing barriers. Installing the NA611-A with AC 85~265V direct line power allows power meters to be connected directly to existing AC distribution boards without auxiliary DC adapters, streaming submetering data straight to the building energy management software.
FAQ Section
1. What are the key advantages of 5.8GHz WiFi on NA611 and NA611-A compared to 2.4GHz?
The 2.4GHz ISM band in industrial environments is heavily crowded with Bluetooth, ZigBee, and common wireless devices. The 5.8GHz frequency band on NA611 / NA611-A offers significantly higher bandwidth, cleaner channels, and immunity from 2.4GHz co-channel interference, ensuring deterministic low-latency serial data transmission for critical automation controls.
2. How do I configure the NA611 serial server parameters (SSID, IP, baud rate)?
The NA611 series supports multiple convenient configuration methods: web browser HTTP management page, standard AT command set via serial port, and Ebyte's free graphical Network Configuration Tool via UDP broadcast, enabling rapid multi-device batch deployment without manual IP reconfiguration.
3. How does the 4-way Socket feature operate on the NA611-S?
The 4-way Socket feature allows the NA611-S to establish up to 4 simultaneous independent TCP/UDP client connections to different IP servers or cloud endpoints. Serial data received from the RS485 port is intelligently distributed or mirrored across all 4 active socket links according to your configuration.
4. How do I restore the device to factory default settings?
Each NA611 unit is equipped with a hardware RESTORE button. To reset the device, press and hold the RESTORE button for approximately 5 seconds while powered on; all status indicators will flash and the device will restart with factory default IP address, SSID, and 9600 bps baud rate.
