Siemens WLCOM35 Profinet Plus Modbus TCP Module

Siemens WLCOM35 is a COM35 communication module designed for Siemens 3WL air circuit breakers, delivering PROFINET IO and Modbus TCP in a single compact unit that mounts to the breaker assembly. It is certified for Conformity Class C, the highest rating Siemens assigns to fieldbus interface devices. The module provides PROFINET IO for real-time I/O data exchange and Modbus TCP for broader integration with PLCs, HMI panels, and SCADA systems, enabling seamless data flow between the protective device and the control network. For retrofit installations on 3WL breakers, Siemens offers a COM35 retrofit kit that includes mounting hardware and cabling to simplify installation. Marketed as the PROFINET IO / Modbus TCP module for the 3WL family, WLCOM35 combines two widely used Ethernet protocols in one device, aligning with Siemens' COM35 communication interface standard.