Allen-Bradley 1756-IB32 32-Point DC Sink Input Module

Product Description

The 1756-IB32 is a 32-channel digital DC input module from Allen-Bradley, engineered for ControlLogix systems. It provides reliable 12/24V DC sinking inputs with fast response, minimal power consumption, and robust thermal performance for industrial applications. Designed to occupy a single slot, this open-style module is suitable for dense PLC configurations where precise digital input monitoring is required.

Technical Specifications

• Manufacturer: Allen-Bradley

• Model / Part Number: 1756-IB32

• Product Type: Digital DC Input Module

• Number of Inputs: 32 (arranged in 2 groups of 16)

• Voltage Category: 12/24V DC sinking

• Operating Voltage Range: 10–31.2 V DC

• Nominal Input Voltage: 24 V DC

• Current Draw @ 5.1V: 120 mA

• Total Backplane Power: 0.66 W

• Maximum Power Dissipation: 6.2 W @ 60°C (140°F)

• Thermal Dissipation: 21.1 BTU/hr @ 60°C (140°F)

• Slot Width: 1

• Wire Category (Signal Ports): 1

• Enclosure Type: None (open-style module)

• Weight: 1 kg

Features

• Compact single-slot design for efficient PLC installation

• High-density 32-point digital input capability

• Sinking configuration for standard 12/24V DC input devices

• Low backplane power draw and controlled thermal output

• Individual group input isolation ensures system reliability

Applications

• ControlLogix systems requiring multiple DC inputs

• PLC panels for machine control or process monitoring

• Industrial automation systems with fast signal response needs

FAQ / Comparison

• Q: Can this module be used for both 12V and 24V systems?
  A: Yes, the 1756-IB32 supports 12/24V DC nominal with an operational range of 10–31.2V DC.

• Q: How does it compare to 1756-IB16?
  A: The 1756-IB32 provides double the input points, supporting denser PLC configurations with fewer modules.