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

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

Price range: $106.02 through $399.90

The Allen-Bradley 1756-IB32 is a high-density 32-point 24V DC digital input module designed for high-point-count discrete automation panels. Operating within a 10 to 31.2V DC input range, it senses optical sensors, limit switches, and field pushbuttons while maximizing chassis slot efficiency. Divided into two distinct 16-point groups, it offers customizable input filtering to eliminate electrical noise and contact bounce. Integrated front-panel LEDs deliver instant channel status diagnostics to simplify system troubleshooting.

$106.02
$279.00
$399.90
SKU: 1756-IB32 Category: Brand:

Description

  • Part Number: 1756-IB32
  • Manufacturer: Allen-Bradley
  • Type: 32-Point DC Sinking Input Module
  • Series: ControlLogix 1756 Series
  • Application: High-Density Factory Automation Sensing
  • Size // Rating: 32 Points, 12/24V DC Sinking
  • Connection Type: 36-Pin Removable Terminal Block (RTB)
  • Compatibility: Allen-Bradley ControlLogix 1756 System

TCI is not an authorized Allen-Bradley distributor.

Warranty Coverage

This product is backed by a TCI Supply 1 year Warranty.

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Description

The Allen-Bradley 1756-IB32 is a high-density digital input module built for the ControlLogix system architecture, delivering 32 discrete 24V DC input channels in a single slot. It serves as an essential interface between field-level sensing hardware—such as proximity switches, photoelectric sensors, pushbuttons, and auxiliary contacts—and the ControlLogix processor logic.

Designed with a sinking input configuration, the 1756-IB32 draws current from external sourcing field devices across a wide 10 to 31.2V DC operational spectrum. The 32 channels are arranged into two separate isolated groups of 16 points, allowing engineers to partition input wiring across distinct field power circuits. Software-configurable input delay filters allow system integrators to smooth out signal noise, contact chatter, and transient voltage spikes before logic state evaluation occurs.

Field wiring connects securely through a 36-pin Removable Terminal Block (1756-TBCH or 1756-TBS6H), facilitating rapid module swap-outs without disrupting physical wire terminations. Fully supporting Removal and Insertion Under Power (RIUP), the module allows maintenance teams to perform hot-swapping or panel upgrades while the surrounding system remains operational, maintaining production continuity.

Frequently Asked Questions

What is the primary function of the Allen-Bradley 1756-IB32?

The 1756-IB32 converts 24V DC discrete signals from field devices (such as pushbuttons, proximity sensors, and limit switches) into digital data for ControlLogix controllers.

What input type does the 1756-IB32 use?

It uses a 24V DC sinking input configuration (sinking current from external sourcing field devices) operating within a 10 to 31.2V DC range.

Which Removable Terminal Block (RTB) is required for this module?

Due to its high pin density, the 1756-IB32 requires a 36-pin RTB, such as the 1756-TBCH (cage clamp) or 1756-TBS6H (spring clamp).

How are the 32 input channels arranged on the module?

The 32 channels are divided into 2 isolated groups of 16 points (points 0–15 and 16–31), enabling separate field power supply wiring for each group.

Can input filter delays be adjusted on the 1756-IB32?

Yes. Programmers can configure hardware input filter delays (Off-to-On and On-to-Off) via Studio 5000 or RSLogix 5000 software to suppress line noise and switch bounce.

Does the 1756-IB32 support Removal and Insertion Under Power (RIUP)?

Yes. The 1756-IB32 can be safely removed or inserted into an active ControlLogix chassis without shutting down system power.

How do technicians check the status of individual inputs on the card?

The module features a front-panel LED display with individual yellow indicators for each of the 32 input channels that illuminate when a valid signal is detected.

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