The ABB SPFEC12 is a 15-channel analog input module designed for the Symphony Plus S+ HR I/O (Harmony Rack) series, serving as the standard analog signal acquisition card for Bailey INFI 90 / Net 90 distributed control systems (DCS). It converts field analog signals (4–20 mA current or 1–5 V voltage) into digital data for the controller, providing the critical front-end data acquisition layer for process control in power generation, petrochemical, and heavy industry applications.
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