B&R X20 BM11 IO Expansion Module For X20 BM11

X20BM11 is B&R's X20 bus module that acts as the foundation of the X20 I/O system, distributing 24 VDC power to all connected 24 VDC I/O modules and providing a stable power path for expansion in control cabinet installations. The internal I/O power supply connects through the BM11, and the module is 24 VDC keyed to ensure proper insertion, ensuring downstream I/O modules receive supply from a single source and simplifying power topology in compact automation racks. Designed for the X20 backplane, the BM11 features a 12.5 mm pitch (+0.2 mm) to match the modular spacing of X20 components, supporting clean, space-efficient installations. As the base bus module, X20BM11 is compatible with the 24 VDC BM family of I/O modules and is a critical component for scalable, standardized automation architectures built on B&R's X20 platform.