Allen-Bradley | 1794-IB32 | FLEX I/O (1794 Series)

Product Description: Allen-Bradley 1794-IB32

The Allen-Bradley 1794-IB32 is a high-density digital input module in the FLEX I/O family, offering 32 sourcing-compatible (sinking- type) 24V DC input channels. Designed for large-scale discrete input applications, the module is ideal for space-constrained installations requiring efficient and cost- effective I/O expansion. The 1794-IB32 supports distributed control systems and integrates seamlessly into Allen-Bradley's FLEX I/O architecture.

Key Features

• 32 sinking (NPN) digital input channels
• Designed for 24V DC field signals
• Inputs organized into 4 groups of 8 points with shared commons
• Per-channel LED indicators for input status diagnostics
• Supports high-speed logic input detection
• Compatible with FLEX I/O terminal bases and communication adapters
• Compact footprint for high I/O density applications

Technical Specifications

• Input Type: Sinking (NPN), 24V DC
• Voltage Range: 10–31.2V DC
• Nominal Input Voltage: 24V DC
• Input Delay:
  • On: ≤1.0 ms
• Current per Input: 6 mA @ 24V DC
• Isolation Voltage: 50V (group-to-backplane and between groups)
• Operating Temperature: 0°C to 55°C
• Backplane Current: 30 mA @ 5V DC
• Mounting: DIN rail via appropriate terminal base (e.g., 1794-TB32, 1794-TB3G)
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• Large-scale discrete input systems
• Machine status and sensor signal monitoring
• Packaging, material handling, and assembly lines
• Building automation and utility monitoring
• OEM and distributed control architectures using FLEX I/O

Advantages

• High input density reduces module count and panel space
• Sinking input design is compatible with PNP field devices
• Simplified wiring with grouped commons
• LED indicators speed up commissioning and troubleshooting
• Fully integrated into the FLEX I/O system for modular and scalable expansion