Schneider Electric AS-9771--0984-485 Programmable Logic Controller CPU

The Schneider Electric Modicon AS-9771--0984-485 CPU module (also cataloged as PC-0984-485) is the central processing unit for the Modicon 984 series PLCs, providing the execution engine for ladder logic programs and coordinating data flow with backplane I/O modules. Designed for legacy automation, it forms the core of a Modicon 984 controller system, handling program execution, memory, and I/O addressing across the 984 backplane. Electrical input is 120/220 V AC with a listed current draw of 0.5 A or 0.25 A depending on configuration. In Schneider Electric and third‑party documentation, the PC-0984-485 Module Controller Assembly is cited as the CPU component of the Modicon 984 family.