1746-IB32

Allen-Bradley 1746-IB32 – 32-Channel DC Digital Input Module for SLC 500

The Allen-Bradley 1746-IB32 is a high-density DC digital input module designed for SLC 500 PLC systems. It supports 32 sinking-type input channels with a 15–30 V DC operating voltage range, allowing the module to read numerous sensor or switch signals in a compact footprint — making it ideal for complex automation setups with many inputs.

Key features and benefits:
• 32 DC input channels (sinking type) — high input density for complex control systems. 
• Operating voltage 15–30 V DC — compatible with standard control voltages. 
• Compact modular design — fits into SLC 500 rack systems easily.
• Reliable operation under industrial environmental conditions. 
• Allows grouping (8 points per common), simplifying wiring layout for large input sets.

Typical applications:
• Reading binary inputs from sensors, switches or buttons in manufacturing automation lines
• Machine control panels needing many discrete inputs
• Conveyor control systems, safety interlocks, status monitoring
• Any SLC 500-based PLC application demanding high channel count input modules
• Modular control cabinets where space and input density matter

About the manufacturer:
Allen-Bradley, a brand under Rockwell Automation, is a global leader in industrial automation hardware. Their SLC 500 I/O modules — including 1746-IB32 — are widely used in production, process control, and infrastructure automation worldwide due to their reliability, modularity, and strong field support.