The GE Series 90-70 and 90-30 are benchmark legacy PLC systems known for their extreme reliability and longevity in industrial service. The architecture of the 90-70 is VME-based for high-end process control, while the 90-30 offers a more compact, modular rack design for versatile factory automation. Key technical characteristics include high-performance CPUs with floating-point math, redundant power options, and integration with Genius I/O networks. Functionally, these series manage complex discrete and process logic for power plants and assembly lines globally. While many installations have migrated to PACSystems RX3i, these legacy modules remain critical for maintaining existing infrastructure, providing the high availability and robust logic execution required for essential industrial operations.
