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
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.
Mastering Modern Industrial Joystick Controls in Heavy Automation
Industrial joysticks play a pivotal role in human-machine interaction across heavy material handling and mobile hydraulics. These tactile controllers translate complex operator movements into precise electrical signals for PLCs, motion controllers, and DCS networks. Consequently, selecting and installing the right joystick architecture ensures operator safety, reduces fatigue, and optimizes equipment performance.