The ‌ABB CI871AK01 3BSE092693R1‌ is a high-performance PROFIBUS DP communication interface module designed for ABB’s AC 800M controller family. As part of the Control Network Interface (CNI) series, this ruggedized module enables seamless integration between ABB’s 800xA distributed control system and third-party PROFIBUS DP field devices. The ‌CI871AK01 3BSE092693R1‌ supports up to 125 nodes per segment with 12Mbps transmission speed, featuring automatic topology recognition and real-time diagnostic capabilities.