Overview
The Allen-Bradley 1746-IV32 is a high-density discrete input module for the SLC 500 platform. It is a 24V DC current sourcing input module with 32 inputs and 8 points per fused common that fits in any slot of the SLC 500 chassis. This listing is for a Series C unit in used condition, suitable as a direct replacement for failed or aging SLC 500 input modules in plant-floor control panels.
The 1746-IV32 is a Discrete Input module that is a component module of the SLC 500 product range, with thirty-two (32) input channels grouped into four (4) groups of eight (8) channels each. It has a non-replaceable electronically-fused common with the fuse rated at 2.5A and provides 1500V AC-tested isolation from the backplane for 60 seconds.
Key Features of the Allen-Bradley 1746-IV32
- 32 sourcing digital input points at 24V DC nominal
- 4 groups of 8 points per common with electronically-fused commons
- 3 ms maximum ON/OFF signal delay; minimum ON-state voltage 15V DC, maximum OFF-state voltage 5V DC
- 1500V AC channel-to-backplane isolation for 1 minute
- Single-slot 1746 form factor for any SLC 500 modular chassis
Technical Specifications
See the specifications table for verified electrical and mechanical data on this Allen-Bradley 1746-IV32 module.
Typical Applications
- Interfacing pushbuttons, limit switches, and proximity sensors to SLC 500 processors
- High-density discrete input collection in OEM machinery and process skids
- Conveyor, packaging, and material-handling I/O expansion
- Like-for-like replacement in legacy SLC 500 control systems
Compatibility & Replacements
The 1746-IV32 may be installed in any SLC 500 chassis, can be used with any SLC 500 processor, and may be installed in a local I/O rack, extended rack, or distributed I/O rack. It is programmed with RSLogix 500 and is interchangeable across Series A–D revisions for most applications. For new builds, Rockwell recommends migrating to the CompactLogix 5370/5380 platform with 1769 I/O; contact us for migration-path assistance or to source additional 1746 modules.
