Allen-Bradley 1734-IB8K Point I/O Input Module

The Allen-Bradley 1734-IB8K POINT I/O Digital Input Module provides 8 sinking 24V DC inputs for distributed PLC control. Designed for POINT I/O systems in industrial automation, it collects digital signals from sensors, switches, and other field devices to feed CompactLogix and ControlLogix controllers. Key specs include 8 input channels (DC sinking), input voltage range 10–28.8V DC (24V nominal), input current of approximately 4 mA at 24V DC, and input impedance around 3.6 kΩ, with 0.5 ms hardware input filtering configurable up to 63 ms to improve signal stability. The module mounts on a DIN rail within the POINT I/O system and uses a 24V DC power supply. Operating temperature ranges from -20 to 55°C, and per-channel LED diagnostics provide quick status indication. Common replacements are Allen-Bradley 1734-IB8, 1734-IB8S, and 1734-IB8SK. Typical applications include discrete input monitoring in packaging machines, material handling systems, and process automation where reliable 24V DC input signal acquisition is required.