The Allen Bradley AB 120V AC/DC Input Module 1771-IAD /D Rev B02 is a PLC input module designed by Allen-Bradley, a well-known brand in the industrial automation and motion control industry. This module is manufactured in the United States and is designed to provide reliable and efficient input functionality for PLC systems. The model 1771-IAD B is a specific variant of this module, known for its high-quality performance and compatibility with various industrial automation applications.