The Mitsubishi Electric A3NCPUR21 CPU module is a dependable central processor for MELSEC-A PLC systems, engineered for stable control in demanding factory automation and machine-building applications. It supports streamlined architectures and consistent cycle performance to keep production assets responsive and efficient.

Designed for easy integration on A-Series base units, the module interfaces over the backplane bus with I/O, motion, and communication modules to enable scalable, modular control. Robust diagnostics and clear status indication help maintenance teams shorten fault-finding, while Mitsubishi engineering tooling and proven PLC logic execution provide predictable, deterministic operation across complex machines and lines.

Whether used for new builds or as a drop-in replacement in existing MELSEC-A racks, this CPU module helps minimize downtime and extend equipment life, and it is backed by a 1-year warranty for added assurance throughout commissioning and operation.

• Brand: Mitsubishi Electric
• Series: MELSEC-A
• Model: A3NCPUR21
• Module type: CPU module
• Connection type: Backplane bus (rack-mounted)
• Compatibility: MELSEC-A base units