Allen-Bradley | 1756-IB32| ControlLogix (1756 Series)

Product Description: Allen-Bradley 1756-IB32

The Allen-Bradley 1756-IB32 is a high-density digital input module designed for use with ControlLogix systems. It features 32 DC sinking input channels that receive signals from sourcing-type (PNP) field devices. This module is ideal for large-scale discrete input applications where panel space and cost efficiency are critical. With built-in status indicators and diagnostics, the 1756-IB32 offers reliable performance in a compact footprint.

Key Features

• 32 digital DC sinking input channels (PNP compatible)
• 24V DC nominal input voltage
• Individually configurable channels for flexible input management
• Input status LED indicators for each channel
• High-density input reduces module and panel count
• Compatible with standard ControlLogix chassis and controllers
• Supports removable terminal blocks (RTBs) for simplified wiring

Technical Specifications

• Number of Inputs: 32
• Input Type: Sinking (PNP sensor compatible)
• Input Voltage Range: 10–30V DC (nominal 24V DC)
• On-State Voltage: ≥10V DC
• Off-State Voltage: ≤5V DC
• On-State Current: 2 mA (min)
• Off-State Current: <1.5 mA
• Isolation Voltage: 250V (continuous, backplane-to-field)
• Backplane Current Draw:
  • 120 mA @ 5.1V DC
• Operating Temperature: 0°C to 60°C
• Mounting: Any slot in a ControlLogix chassis
• Required RTBs: 1756-TBNH, 1756-TBSH, or equivalent 36-position
• Certifications: UL Listed, CE, CSA, RoHS, Class I Div 2

Application Areas

• High-speed machine input detection
• Industrial automation with dense sensor arrays
• Packaging and assembly line controls
• Automotive manufacturing and process control
• OEM systems needing compact digital input expansion

Advantages

• High channel density saves space and reduces cost
• Compatible with standard 24V DC PNP field devices
• Fast, reliable signal acquisition for discrete control
• Built-in diagnostics and status LEDs improve maintenance response
• Easily integrated with ControlLogix architecture and Studio 5000