EBYTE NB144S 4-Channel Serial Server RS232/422/485 RJ45 Modbus Gateway TCP/UDP/MQTT DC 8-28V AT Command Build-in Watchdog

    

       

       

       

       

       

       

       

       

       

       

       

       

   

Practical Application Scenarios

1. Multi-Sensor Factory Cabinet Centralized Monitoring with EID041 Series Transmitters

Engineers deploy multiple EID041 RS485 temperature humidity transmitters inside workshop electrical cabinets, all connected to the four serial ports of NB144S. The gateway converts discrete Modbus RTU sensor data to Modbus TCP and uploads all environmental readings to factory SCADA platform via Ethernet. Independent serial port parameters avoid data cross-talk between dozens of cabinet monitoring nodes, and industrial wide temperature design fits high-temperature production workshop environments.

2. Multi-PLC Intelligent Building Central Control Networking System

NB144S connects 4 groups of building automation PLC devices through RS232 and isolated RS485 interfaces simultaneously. It realizes remote TCP network access for lighting control, elevator monitoring and fresh air system equipment. MQTT client mode supports uploading operating data to cloud IoT platforms, and built-in watchdog prevents communication breakdown caused by PLC abnormal reset.

3. Water Conservancy Hydrological Multi-Node Data Acquisition System

Matched with Ebyte RS485 liquid level and flow sensors, NB144S aggregates multi-channel hydrological collection data. The three-proof anti-salt spray shell adapts damp reservoir control rooms and coastal pump stations. Auto reconnection and heartbeat packet mechanisms ensure stable long-term data upload to remote hydrology management servers even under unstable industrial network conditions.

4. Warehouse Automated Conveyor Equipment Remote Debugging

Four serial channels of NB144S connect conveyor motor controllers, barcode readers and safety alarm modules at the same time. Virtual serial port function allows remote PC to directly communicate with local serial devices over LAN, eliminating frequent on-site wiring debugging work for maintenance technicians. Multiple socket connections support simultaneous access by multiple engineering host computers.

5. New Energy Charging Station Multi-Pile Central Gateway

Each RS485 channel links several charging pile main control boards, NB144S converts pile Modbus RTU charging data to Ethernet TCP protocol and transmits to station background server. DC wide voltage input adapts unstable on-site industrial power supply, and registration packet function distinguishes data streams from different charging piles to avoid identification confusion on cloud platform.

 

FAQ Section

1. Can each of the four serial ports of NB144S run independent network modes separately?

Yes, all four serial channels support separate parameter configuration. Users can set different TCP, UDP or MQTT working modes, independent local port numbers and baud rates for each channel without mutual interference, which meets mixed access demands of various serial industrial equipment on one gateway.

2. Does NB144S support communication between multiple upper computer hosts and one serial device at the same time?

It supports multi-host gateway function under TCP Server mode, up to 6 concurrent socket connections for each serial port. Multiple remote engineering computers can read and send data to the same RS485/232 field device simultaneously through Ethernet without data blocking.

3. What protective effect does the built-in watchdog of NB144S bring to industrial networking?

The integrated hardware and dual software watchdog continuously monitors system operation. If network deadlock, serial data crash or program freeze occurs, the device will automatically reset within milliseconds to resume serial-Ethernet transparent transmission, greatly reducing unattended on-site equipment offline failure rate.

4. Is NB144S compatible with third-party Modbus master controllers and cloud IoT platforms?

It fully follows standard Modbus TCP and RTU international protocols, compatible with all mainstream industrial PLC, touch screen, SCADA software and public cloud platforms that support MQTT or TCP socket transmission, no extra protocol conversion equipment required.

5. Can NB144S work normally in coastal chemical plant humid corrosive environments?

The whole circuit board is covered with three-proof conformal coating with anti-fungal, anti-humidity and anti-salt spray performance, and the working temperature range covers -40 to +85 Celsius, so it can run stably year-round in high humidity, salt fog coastal and chemical workshop sites.