The ABB 3BDH000320R0101, also known as the SDI 1601, is a high-performance digital input module designed for the ABB Symphony Plus S+ Control SD Series E1 I/O system. This module provides a reliable interface for acquiring 16 channels of 24 VDC digital signals from field devices. It is engineered for demanding industrial environments, particularly in power generation and water treatment applications, ensuring precise data acquisition and seamless integration into the overall control architecture. The SDI 1601 is a crucial component for monitoring process statuses and events, contributing to the safety, efficiency, and reliability of the plant’s operations.