Allen-Bradley 1794-IB8 Flex I/O 8-Point Input Module By wayne No Comments on Allen-Bradley 1794-IB8 Flex I/O 8-Point Input Module 3 Min Read Buy the Allen-Bradley 1794-IB8 Flex I/O module. This unit offers 8 current sinking inputs with 24V DC nominal voltage. It provides reliable signal acquisition for industrial control systems.