The ABB DDI01 (Part Number: 3BSE018597R1) is a 16-channel digital input module designed for ABB‘s AC500 PLC, Symphony Plus, and System 800xA automation platforms. As a critical component within the S800 I/O family, this module serves as the “nerve ending” of the control system, reliably capturing binary signals from field devices such as pushbuttons, limit switches, relay contacts, and proximity sensors, and converting them into logical states recognizable by the controller .
The DDI01 is engineered for high-density signal acquisition in demanding industrial environments, supporting both dry contact and wet contact input types. Its robust isolation technology and comprehensive diagnostic features make it an ideal choice for process control, manufacturing automation, and critical safety interlock applications.