The Allen-Bradley 1791-16B0 is a DC input Block I/O module from the Rockwell Automation 1791 series, designed for efficient signal interfacing and monitoring in distributed industrial control systems. It features 16 input channels rated at 24V DC and operates by converting received input signals into DC power for use by the connected processor. With a maximum input impedance of 3.4 kΩ, the 1791-16B0 supports a wide variety of input devices, including pushbutton, float, selector, limit, and proximity switches. This module provides reliable performance, flexible configuration, and seamless integration within Allen-Bradley automation environments.