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
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Essential Motion Control Commands: A Practical Guide for Engineers
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The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
Implementing robust protection in hazardous industrial environments represents a fundamental safety requirement in factory automation. Process facilities often handle volatile gases, dusts, and chemical agents that pose significant combustion risks. Consequently, control system engineers must deploy energy-limiting interfaces to isolate safe-area control cabinets from hazardous-area field instrumentation. This article examines the function, selection, and electrical principles of intrinsic safety barriers within modern PLC and DCS networks.