AiGW600W 6-Port WiFi Wireless Modbus Multi-Master Gateway with Built-in WiFi Router

AiGW600W Product Overview

The AiGW600W is an intelligent Modbus multi-master gateway developed by Shenzhen Yitian Guanglian Technology Co., Ltd. It integrates WiFi wireless communication, dual LAN Ethernet ports, and 6 RS485 serial ports, making it a high-performance solution for multi-system sharing of Modbus device data in industrial environments. The gateway supports intelligent Modbus switch mode, transparent transmission mode, and multi-master sharing mode, enabling PLC hosts, HMI touchscreens, remote cloud servers, and WiFi/Ethernet hosts to simultaneously access slave device data.

The AiGW600W features industrial-grade DIN rail mounting with a black metal enclosure. It is equipped with a detachable WiFi antenna on the left, WAN, LAN1, and LAN2 Ethernet ports on the front, 6-channel RS485 terminal blocks, four status indicators (PWR, CMD, Socket, Active), and an MRDF reset button. It is suitable for smart water, energy management, industrial automation, and many other scenarios.

Key Product Features

• 6-channel isolated RS485 serial ports: Each channel has independent A+, G, B- terminals, supports multi-bus concurrent polling
• WiFi + dual LAN triple network port design: WAN, LAN1, LAN2 Ethernet ports plus WiFi wireless for flexible networking
• Intelligent Modbus switch mode: Automatic Modbus address table allocation, 5 buses concurrent polling, supports multi-master simultaneous read/write
• Protocol-independent transparent mode: 6 RS485 channels mapped to TCP/IP ports 6020-6025, any protocol can be transparently transmitted
• Multi-master sharing mode: 1 channel for slave, 5 channels for hosts, enabling multi-system data sharing
• Remote cloud server access: Connect to cloud via WiFi or Ethernet for remote monitoring

Hardware Interface and Indicator Description

Interface Layout

The AiGW600W gateway features industrial-grade DIN rail mounting. From left to right: WiFi antenna interface, WAN port, LAN1 port, LAN2 port, MRDF reset button, 6-channel RS485 terminal blocks (in two groups of 3), and power terminals. Four status indicators are located on the right side.

Ethernet Interfaces

• WAN port: Wide area network interface for connecting to upstream network or internet
• LAN1 port: Local area network port 1 for connecting local host or switch
• LAN2 port: Local area network port 2 for connecting local host or switch

RS485 Serial Port Definitions

Total 6 RS485 serial ports, each with terminal definitions A+, G, B-:

• RS485 1 (Port 1): First RS485 bus
• RS485 2 (Port 2): Second RS485 bus
• RS485 3 (Port 3): Third RS485 bus
• RS485 4 (Port 4): Fourth RS485 bus
• RS485 5 (Port 5): Fifth RS485 bus
• RS485 6 (Port 6): Sixth RS485 bus

Indicator Definitions

• PWR (red): Power indicator, solid on when powered
• CMD (green): Command/running status indicator, flashes during normal operation
• Socket (orange): Network connection indicator, solid or flashing when Socket connected
• Active (green): Data activity indicator, flashes during data communication

Other Interfaces

• WiFi antenna: Detachable antenna on the left for WiFi wireless communication
• MRDF button: Reset/configuration button for factory reset or entering configuration mode
• Power terminals: Right-side power input terminals, DC power supply

Three Operating Modes Detailed

The AiGW600W supports three operating modes, users can flexibly select according to field requirements:

Mode 1: Intelligent Modbus Switch Mode (Multi-Master Mode)

This is the core function mode of AiGW600W, using intelligent Modbus switch technology to achieve simultaneous access to multiple slave buses by multiple hosts.

Connection method:

• Ports 1, 2, 3, 4, 5: Connect to slave devices (such as flow meters, energy meters, PLCs, etc.)
• Port 6: Connect to Modbus host (such as touch screen, PLC, configuration software, etc.)
• WiFi: Connect to host, uses Modbus TCP protocol
• LAN1/LAN2 ports: Connect to host, uses Modbus TCP protocol

Modbus address table allocation:

• 1-Serial port 1, current range 1 to 10
• 2-Serial port 2, current range 11 to 20
• 3-Serial port 3, current range 21 to 30
• 4-Serial port 4, current range 31 to 40
• 5-Serial port 5, current range 41 to 50
• X-Exit

Working principle: All 5 buses use concurrent polling and support multi-master simultaneous read/write. The gateway automatically routes host requests to the corresponding slave bus based on the Modbus address table, achieving real-time performance no less than direct connection. Supports remote cloud servers, HMI touch screen hosts, PLC hosts, and WiFi/Ethernet hosts to simultaneously access slave data.

Mode 2: Transparent Transmission Mode (All RS485 Ports Connect to Slaves)

In transparent mode, all 6 RS485 serial ports connect to slave devices, each serial port independently maps to a TCP/IP port,实现 transparent transmission of serial data to Ethernet/WiFi, regardless of communication protocol.

TCP/IP port mapping:

• TCP/IP port 6020: Corresponds to RS485 port 1
• TCP/IP port 6021: Corresponds to RS485 port 2
• TCP/IP port 6022: Corresponds to RS485 port 3
• TCP/IP port 6023: Corresponds to RS485 port 4
• TCP/IP port 6024: Corresponds to RS485 port 5
• TCP/IP port 6025: Corresponds to RS485 port 6

Connection method: All RS485 ports connect to slaves, WiFi and LAN ports connect to hosts. In transparent mode, any communication protocol can be transparently transmitted via WiFi or Ethernet, suitable for networking devices with non-standard protocols.

Mode 3: Multi-Master Sharing Mode (1 Slave + 5 Hosts)

In this mode, 1 RS485 channel connects to slave, the remaining 5 RS485 channels connect to hosts, enabling multiple Modbus hosts to simultaneously share data from one slave bus.

Connection method:

• Port 1: Connect to slave (Modbus RTU device)
• Ports 2, 3, 4, 5, 6: Connect to Modbus hosts (such as PLC, HMI touch screen, configuration software, etc.)
• WiFi/LAN ports: Connect to Ethernet hosts, uses Modbus TCP protocol

Working principle: The gateway caches slave data and distributes it to each host,实现 multi-master simultaneous read/write without bus conflicts. Supports PLC hosts, HMI touch screen hosts, remote cloud servers, and WiFi/Ethernet hosts to simultaneously access the same slave data.

System Application Architecture

Typical system connection for AiGW series intelligent Modbus multi-master gateway:

• PLC host: Connect to gateway via RS485 or Ethernet to read/write slave data
• HMI touch screen host: Connect to gateway via RS485 or Ethernet for real-time monitoring and operation
• Modbus slave bus: Connect to field devices such as flow meters, energy meters, sensors
• WiFi, Ethernet host: Uses Modbus TCP protocol to access gateway via WiFi or wired network
• Remote cloud server: Remotely access gateway via internet for cloud data collection and monitoring

Technical Specifications

Typical Application Scenarios

• Smart Water: Multi-channel flow meter data simultaneously shared with local SCADA, water management platform, and remote cloud server
• Energy Management: 6-channel energy meter bus concurrent collection, multi-system simultaneous access to energy data
• Industrial Automation: PLC and HMI simultaneously access field devices without duplicate wiring
• Smart Building: Multi-system sharing of building control devices, WiFi wireless access eliminates wiring hassle
• Non-standard Protocol Device Networking: In transparent mode, any serial protocol can be transmitted via WiFi or Ethernet
• Remote Monitoring: Connect to cloud via WiFi for remote device maintenance and data collection