Overview
The Allen-Bradley 1746-IV32 is a 32-channel 24V DC digital input module designed for the SLC 500 family of programmable controllers. This module is a 24V DC current sourcing input module with 32 inputs and 8 points per fused common that mounts in any slot of the SLC 500 chassis. The module is a single slot unit that directly installs to any SLC 500 chassis. Built for reliable discrete signal acquisition in industrial automation, the 1746-IV32 Series C provides robust isolation and noise immunity for factory floor environments.
Key Features
- Thirty-two (32) 24 Volt DC input channels organized in four (4) groups of eight (8) channels each
- Non-replaceable electronically-fused common with the fuse rated at 2.5A and provides a 60s 1500V AC-tested isolation from the backplane
- Signal delay of 3ms maximum for both ON and OFF states
- CE, CSA, and UL-certified with NEMA standard ICS 2-230 noise immunity
- Operating temperature range of 0–60°C at 5–95% relative humidity
- May be installed in any SLC 500 chassis with any SLC 500 processor, in local I/O racks, extended racks, or distributed I/O racks
Technical Specifications
Input voltage range: 15–30V DC @ 50°C; 15–26.4V DC @ 60°C
Backplane current: 0.050 Amperes @ 5 Volts DC
Minimum ON-state voltage of 15V DC; maximum OFF-state voltage of 5V DC
Nominal input current of 5.1mA per point; maximum heat dissipation of 0.2W per point (6.65W aggregate)
Withstands working vibration of 2.5G at 57–200Hz and operational shock of 30G
Typical Applications
- Discrete sensor and switch interfacing in material handling systems
- Machine control and safety circuit monitoring
- Building automation and HVAC control systems
- Small to medium process control operations
- Production line monitoring and sequencing
- Remote I/O and distributed control architectures
Compatibility & Replacements
Compatible With
- SLC 500 modular controllers (all processor types)
- SLC 500 local I/O chassis
- SLC 500 extended I/O racks
- SLC 500 distributed I/O systems
- Any SLC 500 configuration slot (except slot 1, reserved for processor)
Replaces / Drop-In Replacement For
- 1746-IV32 Series A, B, and D modules (Series C upgrade)
- Legacy 1746-IV16 configurations requiring higher I/O density
Works With
- RSLogix 500 programming software
- RS Linx communications gateway
- SLC 500 Instruction Set (ladder logic)
- DH+ and DH-485 networks
- Allen-Bradley CompactLogix migration paths
