Product Overview

The Allen-Bradley 1746-IB32 delivers high-density discrete input capacity for the SLC 500 PLC platform. This module interfaces 32 separate 24V DC field devices—such as proximity sensors, limit switches, and photoelectric eyes—into a single chassis slot. By doubling the point count of standard 16-point modules, it significantly reduces the physical footprint and hardware costs of your control system. We supply this unit as 100% Brand New and Original in factory packaging, specifically supporting Series D requirements for modern SLC architectures.

Technical Specifications

Engineering Advantages

• Maximized Cabinet Space: The 32-point architecture allows you to consolidate large quantities of field wiring into fewer SLC 500 chassis slots. This prevents the need for chassis expansions or additional power supplies in dense automation environments.

• Industrial-Grade Noise Immunity: High-voltage isolation (1500V) separates the field-side 24V DC power from the sensitive 5V logic of the SLC backplane. This barrier protects the processor from electrical transients and common-mode noise generated by heavy industrial machinery.

• Fast Response Times: A consistent 3 ms signal delay ensures the module tracks rapid state changes from high-speed sensors. This speed supports precise timing in packaging, assembly, and high-speed sorting applications.

• Enhanced Heat Management: The module utilizes an efficient 24V DC sink circuit that dissipates only 0.20 Watts per channel. This low thermal profile prevents overheating in crowded control panels, maintaining system stability even at the maximum operating temperature of 60°C.

FAQs

What type of field devices are compatible with the 1746-IB32?

The 1746-IB32 features a "Sinking" input circuit. You must use "Sourcing" field devices (typically PNP sensors) that provide a positive 24V DC signal to the input terminal to complete the circuit.

Does this module include the wiring connector?

The 1746-IB32 requires a high-density 40-pin connector. We recommend using the 1746-N3 or 1746-N4 connectors or a pre-wired cable assembly (such as the 1746-HC series) for faster installation. Always check if your replacement needs a new connector or if you can reuse the existing field wiring arm.

Can I use the 1746-IB32 in any slot of the SLC chassis?

Yes, you can install the 1746-IB32 in any available I/O slot of a 1746 SLC chassis. However, ensure your power supply (e.g., 1746-P1, P2, or P4) can support the 103 mA current draw on the 5V rail for this and all other modules in the rack.

Is this module compatible with older SLC 5/01 or 5/02 processors?

Yes, the 1746-IB32 is compatible with the entire SLC 500 family (5/01 through 5/05). Because it is a high-density module, ensure your RSLogix 500 software is updated to the version that supports 32-point I/O addressing.