1746-OB32E | Allen-Bradley SLC 500 Digital DC Output Module

Product Overview

The Allen-Bradley 1746-OB32E functions as a high-density discrete output interface for the SLC 500 controller platform. It provides 32 sourcing output channels, allowing a single chassis slot to control an extensive array of 24V DC field devices such as solenoids, pilot lights, and small motor starters. The "E" designation signifies integrated electronic protection, which shields the module from overcurrent and short-circuit faults. We supply this unit in 100% Brand New, original factory condition, ensuring your legacy systems maintain peak uptime with modern, unpowered hardware.

Technical Specifications

Engineering Advantages

• High-Density Chassis Optimization: The 1746-OB32E packs 32 outputs into a single-slot footprint. This design quadruples the capacity of standard 8-point modules, allowing you to shrink your control cabinet size or expand system capabilities without upgrading to a larger chassis.

• Integrated Electronic Protection: The module features onboard electronic short-circuit protection. This circuitry detects overcurrent conditions and shuts down the affected output group instantly. This proactive defense prevents internal module damage and eliminates the need for external fuses for each individual point.

• Rapid Signal Response: With a signal turn-on delay of only 0.1 ms and a turn-off delay of 1.0 ms, the 1746-OB32E handles high-speed triggering applications. It ensures precise timing for packaging, sorting, and other fast-acting automated machinery.

• Robust Load Management: The module manages up to 8.0A of total current across two commons (16 points per common). By distributing the load across these groups, the module maintains stable operation even in high-ambient temperature environments up to 60 °C.

• Simplified Field Wiring: This module typically utilizes high-density 40-pin connectors or 1492-series pre-wired cables. This configuration accelerates installation, reduces wiring errors, and organizes the enclosure interior for easier maintenance.

FAQs

• What is the difference between the 1746-OB32 and the 1746-OB32E?

  The "E" version includes Electronic Protection. While the standard OB32 requires external fusing to prevent module failure during a short circuit, the 1746-OB32E protects itself automatically, resetting once you clear the fault and cycle power.

• Can I use this module for "Sinking" output requirements?

  No. The 1746-OB32E is a Sourcing module. It switches the positive 24V DC leg to the load. If your field devices require a ground-switching (Sinking) configuration, you require a module such as the 1746-OV32.

• Is this a refurbished or used product?

  Absolutely not. We guarantee this 1746-OB32E is 100% Brand New. It ships in the original Allen-Bradley factory box with intact security seals, providing you with the full service life of the component.

• Does the module draw significant power from the backplane?

  No. Despite its 32-point capacity, the module draws only 190 mA from the 5V DC backplane. This efficiency preserves your SLC power supply capacity (such as the 1746-P1 or P2) for other critical processor and communication tasks.