Ebyte Multi-serial Server Series  Introduction

Ebyte's independently developed multi-serial server series integrates a TCP/IP protocol stack, enabling bidirectional transparent data transmission between serial ports and Ethernet ports, Modbus protocol conversion, and serial device cloud connectivity. Its industrial-grade design ensures stability in harsh working environments, and rich indicator light effects provide feedback on different device operating statuses.

Product Series Overview

The product lineup includes:

  • 2-serial-port industrial servers: NB124-V2 (isolated), NB124S-V2 (non-isolated), NB124E-V2 (isolated, POE-powered), NB124ES-V2 (non-isolated, POE-powered).

  • 4-serial-port industrial servers: NB144-V2 (isolated), NB144S-V2 (non-isolated), NB144E-V2 (isolated, POE-powered), NB144ES-V2 (non-isolated, POE-powered).

  • 8-serial-port industrial servers: NB183-V2 (isolated), NB183S-V2 (non-isolated), NB183E-V2 (isolated, POE-powered), NB183ES-V2 (non-isolated, POE-powered).

Parameter Comparison

Key Features of NB1XX-V2 Series

The NB1XX-V2 series industrial multi-serial servers are specifically designed for industrial IoT applications. They support RS485/RS232/RS422 multi-interface conversion, integrate Modbus gateway, MQTT/HTTP protocol stacks, and virtual serial port functions, enabling seamless connectivity between serial devices, Ethernet, and cloud platforms. Suitable for scenarios such as equipment room monitoring, intelligent transportation, power automation, and environmental monitoring, they offer high stability, flexible scalability, and ease of use.

Configuration is supported via upper computer software or AT commands, allowing simple setup to achieve serial device networking and cloud connectivity. The series is widely used in industries including equipment room monitoring, environmental monitoring, intelligent transportation, barrier gate control, and smart lockers.

Functional Features

  • Industrial-grade design: Stable and reliable with high-level port protection.

  • Rich LED status indicators: Quickly identify device working status.

  • Power supply flexibility: Supports terminal or DC jack power input, 8~28V DC wide voltage range, and reverse connection protection.

  • Diverse interfaces: Terminal interfaces (RS485) and standard DB9 interfaces (RS232).

  • Isolation support: Isolated versions feature 8-channel independent hardware isolation for serial ports.

  • Ethernet compatibility: 10/100M Ethernet interface.

  • Configuration options: Tool-based configuration and AT commands (web-based configuration to be supported in future).

  • Serial parameters: Baud rate from 2400 to 115200bps, with odd, even, or no parity.

  • Network features: Configurable DNS, user-defined timeout restart (default 30 minutes), short connection maintenance, and serial buffer cleanup.

  • Maintenance functions: Hardware factory reset and online firmware upgrade for custom functionality.

  • Data transmission: Multiple registration and heartbeat packet modes; supports DHCP for dynamic IP, subnet mask, gateway, and DNS server acquisition.

  • Working modes: TCP Server, TCP Client, UDP Server, UDP Client, MQTT Client, HTTP Client.

  • Multi-server support: Multiple simultaneous servers, each supporting up to 5 client connections.

  • Modbus integration: Modbus gateway with active reporting for RTU devices; bidirectional conversion between Modbus TCP and RTU (storage mode for automatic data collection or multi-master query-response mode).

  • Cloud connectivity: MQTT gateway for quick access to Alibaba Cloud and standard MQTT3.1.1 servers (OneNET, Baidu Cloud, Huawei Cloud, etc.).

  • Data reporting: Modbus data can be actively reported to TCP transparent transmission servers or MQTT servers.

  • HTTP support: HTTP Client mode with HTTP/1.1, supporting GET and POST requests.

  • Communication methods: Direct TCP/IP communication or virtual serial port connection.