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

Product Overview

The Allen-Bradley 1756-IB32/B is a ControlLogix 32-point 12/24V DC digital input module designed for discrete automation systems. It converts field digital signals—such as push buttons, limit switches, proximity sensors, and relay contacts—into logic-level signals that can be read by ControlLogix controllers.

This module provides 32 input channels grouped into two 16-point groups, supports 10–31.2 V DC input, and includes configurable input filtering to help reduce false triggering caused by electrical noise. It installs directly into a ControlLogix chassis and communicates with the controller over the backplane.

The “/B” suffix indicates a specific revision of the 1756-IB32 module. Functional specifications may vary slightly between revisions, so final confirmation should be based on the product label and official Rockwell Automation documentation.

Key Features

• 32 digital input channels for high-density signal acquisition
• 12/24V DC input, operating range 10–31.2 V DC
• Two input groups of 16 points each with group-to-group isolation
• Configurable input filtering for improved noise immunity
• LED status indicators for module and channel diagnostics
• Hot-swappable in a ControlLogix chassis
• Compatible with standard ControlLogix racks in any slot
• Supports RSLogix 5000 / Studio 5000 Logix Designer configuration

Technical Specifications

Specification	Detail
Brand	Allen-Bradley / Rockwell Automation
Series	ControlLogix
Part Number	1756-IB32/B
Module Type	Digital Input Module
Number of Inputs	32
Input Voltage Category	12/24V DC
Input Voltage Range	10–31.2 V DC
Input Type	Current sinking
Input Grouping	2 groups × 16 points
Isolation	Input-to-backplane and group-to-group; no isolation between individual inputs within a group
Input Filtering	User-configurable
Installation	ControlLogix chassis, any slot
Configuration Software	RSLogix 5000 / Studio 5000 Logix Designer
Lifecycle Status	Active for 1756-IB32 series

Applications

The 1756-IB32/B is commonly used in:

• Discrete manufacturing for monitoring sensors, switches, and safety interlocks
• Machine automation for start/stop signals, position detection, and equipment status feedback
• Packaging and material handling for conveyor, photoelectric sensor, and cylinder position monitoring
• Process control systems for valve limit switches, pump feedback, and alarm contacts
• Automotive, food and beverage, and general assembly lines
• System expansion where additional 24V DC input points are required

Why Choose the 1756-IB32/B

The 1756-IB32/B offers a cost-effective way to expand digital input capacity in ControlLogix systems. With 32 input points in a single module, it helps reduce rack slot usage and simplifies wiring compared with lower-density input modules. Its configurable filtering and group isolation make it suitable for electrically noisy industrial environments, while hot-swappable support helps minimize downtime during maintenance.

For procurement and integration teams, this module is a practical option when replacing existing ControlLogix input modules, expanding machine I/O, or standardizing spare parts for 24V DC digital input applications.

Compatibility

The 1756-IB32/B installs into a ControlLogix 1756 chassis and requires a compatible removable terminal block, such as 1756-TBCH or 1756-TBS6H. It is typically configured using RSLogix 5000 or Studio 5000 Logix Designer, and communicates with ControlLogix controllers through the backplane.

Before ordering, please confirm the required revision, terminal block type, firmware compatibility, and project specifications.

FAQ

What is the difference between 1756-IB32 and 1756-IB32/B?
The “/B” indicates a revision level. Core functionality remains similar, but electrical characteristics, firmware support, or manufacturing details may differ. Always verify the exact revision against your system requirements.

How many input points does the 1756-IB32/B have?
It provides 32 digital input channels, arranged as two groups of 16 points.

What voltage does it support?
It supports 12/24V DC input with an operating range of 10–31.2 V DC.

Can it be replaced while the system is powered?
Yes. ControlLogix I/O modules generally support hot swapping, but replacement should follow proper safety and wiring procedures.

Call to Action

Looking for the Allen-Bradley 1756-IB32/B? Contact us for availability, lead time, pricing, and technical details. We can help verify revision compatibility, terminal block selection, and ControlLogix system requirements before shipment.

1756-IB32B

Our products are widely used in CNC mechanical metallurgy, petroleum and natural gas, and petrochemical industries,Chemical industry, paper and printing, textile printing and dyeing, machinery, electronic manufacturing, automobile manufacturing,Plastic machinery, electricity, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution.The quoted price is not the actual price. Please contact the shopkeeper before placing the order to confirm the price and delivery time!!!

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