SIEMENS S55375-C111

The Siemens S55375-C111 represents the PXC7.E400S automation station from Siemens’ Desigo PX range. It solves the common challenge of managing complex building services (HVAC, lighting, sensors, actuators) by offering a unified controller that handles communication protocols like BACnet/IP, BACnet SC and integrates other devices via Modbus and MS/TP. With support for up to 100 data-points, this controller allows medium-sized plant installations to centralise monitoring and control, reducing multiple controllers, wiring complexity and integration effort. The freely programmable architecture offers function-block based engineering, making custom logic or sequence control easier than fixed-logic alternatives. Wall or DIN-rail mounting saves panel space, while the built-in KNX PL-Link bus simplifies connection of room sensors or operator units. Compared to older controllers with limited protocols or fixed architectures, the S55375-C111 delivers future-proof connectivity, modular installation and flexible integration—ideal for building automation professionals looking to streamline infrastructure, improve system interoperability and reduce lifecycle cost.