Product Details
Product Overview
The Allen Bradley 1756-OB32 provides high-density discrete output control for the ControlLogix chassis environment. This module enables the processor to switch 32 independent field-side devices, such as solenoids, motor starters, and indicators. By utilizing a sourcing configuration across two distinct groups, it offers a compact solution for large-scale automation projects requiring extensive I/O counts within a single slot footprint. We supply this unit as 100% Brand New original factory stock, ensuring the hardware meets the rigorous timing and electrical isolation standards required for mission-critical logic execution.
Technical Specifications
| Feature | Specification Details |
| Manufacturer | Allen Bradley / Rockwell Automation |
| Number of Outputs | 32 (Sourcing) |
| Output Groups | 2 Groups of 16 Channels |
| Voltage Category | 12/24V DC Source |
| Operating Voltage Range | 10–31.2V DC |
| Current Draw @ 5.1V | 300 mA |
| Current Draw @ 24V | 2 mA |
| Power Dissipation (Max) | 4.8 Watts @ 60°C |
| Thermal Dissipation | 16.37 BTU / Hour |
| Minimum Load Current | 3 mA per Point |
| Slot Width | 1 Slot |
Engineering Advantages
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High-Density Cabinet Optimization: The 1756-OB32 packs 32 output points into a single chassis slot. This density reduces the number of I/O chassis required for large systems, directly lowering hardware costs and shrinking the footprint of the control enclosure.
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Thermal Efficiency: The module manages heat effectively, dissipating only 4.8 Watts at its maximum operating temperature. This low thermal signature prevents localized hot spots within the chassis, protecting neighboring analog or processor modules from heat-induced drift or failure.
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Simplified Group Wiring: The architecture divides the 32 points into two groups of 16. This separation allows engineers to isolate different functional zones or safety circuits on the same module, facilitating easier troubleshooting and circuit segmentation without requiring multiple low-density cards.
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Electronic Keying: Like all ControlLogix modules, the 1756-OB32 supports electronic keying. This feature prevents the system from starting if the wrong module type is inserted during maintenance, protecting field-side equipment from incompatible voltage or signal types.
FAQs
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What type of Removable Terminal Block (RTB) does the 1756-OB32 require?
The high-density 32-point layout requires a 36-pin RTB, specifically the 1756-TBCH (Cage Clamp) or 1756-TBS6H (Spring Clamp). These terminal blocks do not ship with the module and you must purchase them separately.
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Can the 1756-OB32 switch AC loads?
No. The 1756-OB32 is a DC-sourcing module designed for 10–31.2V DC applications. Attempting to switch AC loads will damage the solid-state output circuitry. For AC switching, utilize the 1756-OA or 1756-OW series modules.
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Is this a refurbished or "new-surplus" unit?
Absolutely not. We guarantee that this 1756-OB32 is 100% Brand New, original Allen Bradley equipment. It ships in the original factory box with the UPC 662468702997 and the factory seal intact.
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How do I handle the high wiring density of 32 points in one slot?
To simplify installation and reduce wiring errors, many engineers utilize the Allen Bradley IFM (Interface Module) and pre-wired cables. This transitions the 36-pin module connection to a DIN-rail mounted terminal strip for cleaner cable management.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Implementing FIFO and LIFO Data Sequencing in PLC Programming
Data management serves as a cornerstone of modern industrial automation. Whether tracking materials on a conveyor or managing batch sequences in a process, engineers frequently rely on sequential logic. Two primary structures—First-In-First-Out (FIFO) and Last-In-First-Out (LIFO)—form the bedrock of this data handling. Mastering these blocks allows programmers to optimize complex machine operations efficiently.
Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.