Expansion Unit; Expansion Unit With 8 Points (4 Points Input / Common, 2 Points Output / Common X 2 Circuits); Expansion Unit With Output 8 Points (2 Points Output / Common X 4 Circuits); (2 Points Output / Common X 4 Circuits, 4 Points Output / Common X 2 Circuits) - Fuji Electric MICREX-SX series SPF User Manual