Siemens 6FX1138-5BB04 Sinumerik Industrial Control Circuit Board

The Siemens 6FX1138-5BB04 Sinumerik CPU Module is the central processing unit for legacy Sinumerik 810/820 GA3 CNC controllers, configured within the 805SM environment. This 16 MHz CPU module serves as the processing backbone for program execution, real‑time I/O handling, and machine interface tasks within the Sinumerik 810/820 GA3 architecture. The part is specifically identified as a 6FX1138-5BB04 CPU module designed for the SINUMERIK 810/820 GA3 family, with a firmware baseline described as from SW version 2 and compatibility with ACOP workflows. Typical use involves replacement or retrofitting in older CNC machines that rely on Sinumerik 810/820 GA3 controllers, enabling continued operation of spindle control, axis motion, and cycle control through the existing Sinumerik software stack. Key specifications include: CPU family 805SM, clock speed 16 MHz, designed for SINUMERIK 810/820 GA3, SW version 2+ compatibility, and ACOP support. This part is intended for users performing service, maintenance, or upgrades on Siemens CNC systems that require an authentic SINUMERIK CPU module to maintain compatibility with the machine’s control logic and peripheral integration. Applications include retrofits, spare‑part replacements, and legacy system maintenance on machining centers and turning centers powered by Sinumerik 810/820 GA3 controllers.