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Product information
Specifications

Allen-Bradley 1756-OB16I

Introduction: The Allen-Bradley 1756-OB16I ControlLogix Digital Output Module is a premium industrial-grade discrete actuator control element engineered and manufactured 100% in Malaysia under the strict quality benchmarks of Rockwell Automation. The defining technical benefit of this model lies in the "I" (Isolated) designation within its configuration nomenclature, which signifies total channel-to-channel galvanic isolation. Unlike standard commercial output modules that route multiple channels through shared positive or common ground links, the 1756-OB16I isolates the electrical paths of each output point, empowering automation engineers to mix and match separate, non-synchronized external power loops on a single hardware card.

The 1756-OB16I variant features a high-reliability 16-point digital output layout, operating seamlessly across a direct-current switching envelope from 10 to 30V DC (with a standard 24V DC utility target). This point-to-point isolation architecture eliminates parasitic ground loops and locks down protection lines to prevent localized high-voltage fault surges from propagating across adjacent channels. Complete with front-panel diagnostic LED arrays for real-time per-channel logic state updates and supporting full Removal and Insertion Under Power (RIUP), maintenance field crews can hot-swap worn tracking modules without needing to depressurize plant control loops or bring down line power.

⚠️ TECHNICAL INTEGRATION PROMPT (RTB COMPATIBILITY): Because of its channel-to-channel isolation design, each separate output loop on the 1756-OB16I requires its own dedicated power supply and return terminal points. Consequently, despite having only 16 output nodes, this module strictly requires a 36-Pin Removable Terminal Block (RTB) assembly—such as the 1756-TBCH or 1756-TBSH housing. It is entirely incompatible with standard 20-pin RTBs (e.g., 1756-TBNH).

Key Features & Technical Specifications:

Manufacturer: Allen-Bradley / Rockwell Automation
Product Series: ControlLogix Digital I/O Modules Hardware Family
Model Code: 1756-OB16I
Device Type: Individually Isolated DC Discrete/Digital Output Module
Outputs Capacity Layout: 16 independent isolated output points (Channel-to-Channel and Channel-to-Backplane isolation).
Operating Voltage Range: 10 to 30V DC nominal capability (Sourcing configuration matrix).
Isolation Verification: High-voltage barrier safety rating ensuring complete separation between field power grids.
Onboard Diagnostic Arrays: Front-facing LED status panel indexing universal module health status (OK) alongside independent binary channel execution cycles.
Mechanical Integration: Slide-in modular form factor matching standard 1756 chassis racks; field connections interface via a separate Removable Terminal Block housing assembly (RTB, sold separately).
Country of Origin: 100% Made in Malaysia.