Product Details
Overview
The Allen-Bradley 1756-L81E is a high-performance ControlLogix 5580 controller engineered for demanding industrial automation applications. Designed for large-scale PLC systems, it delivers reliable performance with extensive I/O capacity and flexible communication options including Ethernet and USB. This open-style controller is compatible with multiple ControlLogix chassis and supports both standard and redundant power supplies.
Key Features
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Controller Type: ControlLogix 5580
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User Memory: 3 MB
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Maximum Digital I/O: 128,000 points
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Maximum Analog I/O: 4,000 points
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Communication Interfaces: 1 Ethernet, 1 USB
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Isolation Voltage: 50 V continuous
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Power Dissipation: 6.2 W
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Thermal Dissipation: 21.2 BTU/hr
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Current Draw: 1.2 mA (5.1 V), 5 mA (1.2 V DC)
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Enclosure: Open-style (requires chassis mounting)
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Compatible Chassis: 1756-A4, A4K, A7, A7K, A10, A10K, A13, A13K, A17, A17K Series B/C
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Power Supply Compatibility: Standard 1756-PA50, PA72, PA75 series; Redundant 1756-PA75R, PB75R, PSCA2 series
Technical Specifications
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Manufacturer: Allen-Bradley
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Part Number: 1756-L81E
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Category: Programmable Logic Controller (PLC)
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Application Memory: Large-scale control programs
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Input/Output Capacity: Up to 128,000 digital I/O and 4,000 analog I/O points
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Operating Voltage: Matches supported ControlLogix chassis and power supplies
Application Scenarios
The 1756-L81E is suited for:
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High-speed manufacturing process control
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Integration into complex PLC networks
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Large-scale data acquisition and monitoring systems
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Redundant systems requiring reliable uptime
FAQs
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Q: What is the maximum I/O supported? Up to 128,000 digital and 4,000 analog points
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Q: Which communication ports are available? One Ethernet port and one USB port
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Q: Which chassis can this controller be mounted in? Compatible with 1756-A4, A7, A10, A13, and A17 series
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Q: Are redundant power supplies supported? Yes, including 1756-PA75R, PB75R, and PSCA2 series
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
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.
Mastering PLC Power Supply Architectures and Operating Voltages
Selecting the correct operating voltage is a critical step in designing reliable industrial automation systems. Whether you are working with a compact PLC or a large-scale DCS, your power architecture dictates the system's longevity. In this guide, we explore the standard voltage ranges and power distribution strategies required to maintain stable factory automation operations.