The WAGO 750-352 is a discontinued ETHERNET Fieldbus Coupler belonging to the WAGO I/O System 750. It functions as a communication interface that connects various decentralized digital, analog, and specialty I/O modules directly to a master controller or PAC/PLC network over Ethernet.

• Protocols Supported: Primarily designed for industrial networks operating on EtherNet/IP and Modbus TCP/UDP. It also handles standard IT protocols including HTTP, BootP, DHCP, DNS, SNMP, and FTP. 
• Integrated Switch: Features two RJ-45 Ethernet ports with an internal network switch. This permits line topology wiring across multiple cabinets without requiring external network hubs. 
• Process Image Configuration: Automatically scans and detects any connected WAGO modules (supporting up to 64 modules) on the DIN rail to assemble a local process data map. 
• IP Address Configuration: The module has a physical DIP switch on the housing to manually assign static IP address bytes, or it can be set to pull addresses dynamically via DHCP/BootP. 
• Built-in Webserver: Features an onboard HTML configuration page for diagnostics, status viewing, and system management via standard web browsers (default login typically uses admin as the username and wago as the password). 
• Power Supply: Operating voltage is 24 VDC. It natively powers the internal system electronics, while field-side power for sensors and actuators is routed through separate supply modules.