Yokogawa Electric Corporation B9902PC Controller Board

The Yokogawa B9902PC Controller Board is an industrial-grade CPU control module that centralizes data processing, system coordination, and control logic for Yokogawa chart recorders and data acquisition systems. As an internal PCB assembly, it interfaces with display, scanner, and I/O boards to manage recorder operation and data handling, and it is designed for compatibility with Yokogawa recorder platforms such as the R1000 and 4360 series. In field installations, the B9902PC functions as the core controller for data acquisition, signal processing, and overall system operation, and it is commonly deployed in power plants, chemical processing facilities, oil and gas operations, and manufacturing environments that require reliable process monitoring and continuous logging. Availability tends to be from surplus or secondary markets, and common replacements include Yokogawa B9902PD, B9902PE, and B9902PF.