USED | Allen Bradley 1771-ASB/E Remote I/o Adapter Module Ser E The Allen Bradley 1771-ASB/E is a Remote I/O Adapter Module designed for industrial automation applications. Manufactured in the United States, this module is part of the Allen-Bradley brand and is compatible with PLC systems. It facilitates communication between remote I/O devices and the main control system, enhancing operational efficiency and control capabilities in industrial settings.