The ABB PM640 (3BSE010534R1) is a high-performance processor module designed for the ABB Advant Controller 400 Series. As the central processing unit (CPU) of the system, it executes control logic and manages communication with I/O modules and other system components. Built for demanding industrial environments, the PM640 provides reliable and deterministic control for a wide range of process automation applications. Its robust design ensures system stability and efficient data handling, making it a critical component for maintaining plant operations and productivity within the Advant Open Control System (OCS).