Overview
The Allen-Bradley 1746-IV32 is a SLC 500 digital DC input module delivering 32 input channels in a compact, high-density form factor. This 24VDC sourcing input module is an SLC 500 Digital DC Input Module engineered for general-purpose industrial signal monitoring. It has high density so it is suited for limited panel space, making it ideal for OEMs and system integrators managing constrained panel real estate. The 1746-IV32 can be used in either fixed or modular type controllers.
Key Features
- 32 Inputs with a Voltage Range of 15-30 Volts DC Source
- Available in four series: Series A through Series D; occupies a single module slot
- Modules are fused to offer protection to external wiring with a single fuse for each common rated at 2.5A
- CE, CSA, and UL-certified with NEMA standard ICS 2-230 Noise immunity
- Designed and tested to withstand a working vibration of 2.5G at 57–200Hz with tested peak displacement of 0.015 inches and maintains optimal function even with an operational shock of 30G
- 8 points per common for flexible circuit architecture
Technical Specifications
- Input Type: Digital DC Input
- Input Channels: 32 Inputs
- Operating Voltage: 15 to 30V DC at 122°F and 15 to 26V DC at 140°F
- Input Signal Logic: Minimum ON-state voltage of 15V DC and maximum OFF-state voltage of 5V DC
- Input Current: Nominal input current of 5.1mA at 24V DC
- Maximum OFF-State Current: 1.5mA
- Signal Delay: Maximum delay time of 3ms for both ON and OFF states
- Power Dissipation: 0.2 watts per point; thermal dissipation minimum 0.53 watts, maximum 6.90 watts
- Backplane Current Load: 50mA at 5V; total load 106mA at 5V
- Certifications: CE, CSA, and UL-certified
Typical Applications
- Discrete DC signal monitoring in industrial control systems
- Machine tool and packaging equipment control
- Sensor feedback collection (proximity, limit switches, photoelectric)
- Building automation and HVAC system integration
- Liquid level and pressure monitoring circuits
- Safety interlocks and emergency stop circuit monitoring
Compatibility & Replacements
Compatible With
- SLC 500 fixed and modular type controllers
- SLC 500 rack-based chassis (all slot positions)
- Rockwell Automation / Allen-Bradley SLC 500 platform components
- Standard 24V DC industrial signal sources (PLCs, sensors, pushbuttons)
Replaces / Drop-In Replacement For
The 1746-IV32 Series D is a direct replacement for earlier Series A, B, and C versions of the same model number. The 1746-IV32 is available in four series specifically, Series A – D. Verify series compatibility with your system integrator or Rockwell technical support before substitution.
Works With
- RSLogix 500 / Studio 5000 for SLC 500 programming
- FactoryTalk View and related HMI software
- SLC 500 communication protocols (Ethernet, DH+, Remote I/O)
- Third-party integration via OPC and standard industrial fieldbus gateways
