The Allen Bradley AB 16 Pt ControlLogix D/I 120V AC Module Shell 1756-IA16 /A is a PLC input and output module specifically designed for the ControlLogix controller platform. This module allows for the connection and control of up to 16 points of 120V AC inputs in industrial automation systems. With the trusted Allen-Bradley brand behind it, this module is reliable and efficient for various motion control and automation applications.