1756-IB32 32-Point Digital Input Module 12/24V DC | Allen-Bradley

The Original New Allen-Bradley 1756-IB32 32-Point Digital Input Module is a high-density sinking input module designed for the ControlLogix platform, providing reliable discrete signal acquisition in industrial automation systems. Featuring 32 input channels arranged in two isolated groups of 16, this module is ideal for monitoring limit switches, proximity sensors, pushbuttons, and other discrete field devices in demanding manufacturing and process control environments. Its single-slot, open-style design enables efficient use of chassis space while delivering fast response and robust performance. Series B versions support enhanced diagnostic capabilities and are suitable for use in safety shutdown applications.

Core Engineering Highlights:
32-channel 12/24V DC sinking inputs | 10-31.2V DC operating range | 2 isolated groups of 16 inputs | 1500V AC optical isolation | 120 mA @ 5.1V backplane current | 6.2W max power dissipation | 420 µs input delay + selectable filter | 0-60°C operating temperature

Key Features:

• Original New Allen-Bradley 1756-IB32 module

• 32 digital input channels (12/24V DC sinking)

• Inputs arranged in two isolated groups of 16 for enhanced noise immunity

• 10-31.2V DC wide operating voltage range supports both 12V and 24V DC signals

• Programmable input filter for noise rejection (0-65,535 ms)

• 1500V AC optical isolation between field and backplane

• Individual group input isolation ensures system reliability

• Electronic keying for secure module replacement

• Removable Terminal Block (RTB) compatible with 1756-TBCH and 1756-TBS6H

• Built-in LED status indicators for module and channel-level diagnostics

• Series B version provides enhanced diagnostic capabilities

• Open-style enclosure with single-slot chassis mounting

• 0°C to 60°C operating temperature range

Applications:

• High-density digital signal acquisition from sensors, switches, and pushbuttons

• Conveyor and material handling systems

• Automated assembly lines and manufacturing processes

• Packaging machinery and product counting systems

• Process control valve position monitoring and alarm panels

• Machine tool control and safety interlock systems

• General factory automation and discrete manufacturing

Technical Specifications:

• Catalog Number: 1756-IB32

• Product Family: ControlLogix

• Product Type: Digital DC Input Module

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

• Voltage Category: 12/24V DC sinking

• Operating Voltage Range: 10-31.2V DC

• Nominal Input Voltage: 24V DC

• Input Current (Typical): 7 mA @ 24V DC

• On-State Voltage: 10V DC minimum

• Off-State Voltage: 5V DC maximum

• Off-State Current (Max): 1.5 mA

• Input Delay: Programmable 0-65,535 ms

• Input Delay Time (Hardware): 420 µs plus selected filter time

• Isolation: 1500V AC optical isolation between field and backplane

• Backplane Current (5.1V): 120 mA

• Backplane Current (24V): 2 mA

• Total Backplane Power: 0.66W

• Maximum Power Dissipation: 6.2W @ 60°C

• Thermal Dissipation: 21.1 BTU/hr @ 60°C

• Slot Width: 1

• Wire Category: 1

• Removable Terminal Block: 1756-TBCH or 1756-TBS6H (ordered separately)

• Mounting: Chassis-based (any slot in ControlLogix chassis)

• Enclosure Type: Open-style (IP20)

• Dimensions (W x H x D): Approx. 35 x 145 x 135 mm (1.38 x 5.71 x 5.31 in.)

• Weight: Approx. 0.3 kg

• Operating Temperature: 0°C to 60°C

• Storage Temperature: –40°C to 85°C

• Relative Humidity: 5% to 95% non-condensing

• Certifications: CE, CSA, UL, C-UL-US, FM, ATEX, KC, C-Tick

• Standards Compliance: IEC 60068-2-1, IEC 60068-2-2, IEC 60068-2-6, IEC 60068-2-14, IEC 60068-2-27, IEC 60068-2-30, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-6-4, IEEE C37.90.1

• UPC: 612598171309

System Compatibility:

• Rockwell Automation ControlLogix controllers (all series)

• GuardLogix safety controllers

• 1756 ControlLogix chassis (any slot)

• Studio 5000 Logix Designer® application

• RSLogix 5000 programming software

• 1756-TBCH or 1756-TBS6H Removable Terminal Blocks

Related Products:

• 1756-TBCH – 36-position screw-clamp removable terminal block for 1756-IB32

• 1756-TBS6H – 36-position spring-clamp removable terminal block for 1756-IB32

• 1756-IB16 – 16-channel version for lower density applications

• 1756-IB16D – 16-channel diagnostic input module

• 1756-V32 – 32-channel source input module for sourcing applications

• 1756-OB32 – 32-channel digital output module for ControlLogix

• 1756-PA72 / 1756-PB72 – ControlLogix power supplies

• 1492-CABLExxxP – IFM ready cables for fused input applications

• 1492-IFM20F-F24A-2 – Fused IFM module for 1756-IB32

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. Allen-Bradley, ControlLogix, GuardLogix, and Studio 5000 are trademarks of Rockwell Automation.