Allen-Bradley 1771-IFEK Analog Input – PLC 5 Conformal Coated By wayne No Comments on Allen-Bradley 1771-IFEK Analog Input – PLC 5 Conformal Coated 3 Min Read Buy the Allen-Bradley 1771-IFEK analog input module for PLC 5 systems. Features 16 single‑ended inputs, 12‑bit resolution, and conformal coating. Order today.