Allen-Bradley 1746-IV8 SLC 500 8-Point Input Module

The Allen-Bradley 1746-IV8 is an 8-point digital input module for the SLC 500 family, designed to read eight discrete 24-volt DC signals into the PLC I/O image. This current-sourcing module accepts 24V DC input signals from devices such as pushbuttons, proximity sensors, and limit switches, with each channel corresponding to one input bit on the SLC 500 backplane. It plugs into a 1746 backplane in an SLC 500 chassis, enabling compact expansion of discrete inputs in automation projects. Key specifications include eight input points at 24V DC with current-sourcing topology, suitable for rugged factory environments, and the standard SLC 500 modular I/O architecture for straightforward field wiring and rack integration. Common use cases include start/stop circuits, door or safety interlocks, and sensor monitoring where 24V DC logic is used, making it a drop-in option when expanding legacy AB SLC 500 systems.