The Allen-Bradley 1734-IB8K is an 8-point digital sinking input module from the POINT I/O family. Designed for industrial control systems, this module provides a compact and modular solution for interfacing with 24V DC field devices such as sensors, push buttons, and limit switches. It seamlessly integrates into a POINT I/O system, communicating with a controller over a network via a communication adapter. The ‘K’ designation indicates that the module includes a key switch, allowing for mechanical keying to a specific terminal base, which helps prevent incorrect module placement and ensures system integrity during maintenance or replacement.