Product Details
Product Description
The Allen-Bradley 1756-L71S GuardLogix 5571S Controller is a high-performance safety-certified processor module within the ControlLogix family. It combines standard automation control with integrated safety functions, making it suitable for complex applications requiring both high capacity and SIL-rated safety features.
Technical Specifications
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Manufacturer: Allen-Bradley
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Product Line: ControlLogix / GuardLogix 5570 Series
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Part Number: 1756-L71S
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Weight: 0.56 lbs (0.26 kg)
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Module Type: Processor Module
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User Memory: 2 MB
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Safety Memory: 1 MB
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Nonvolatile Memory: 1 GB CompactFlash (included)
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I/O Capacity (Max): 128,000 digital I/O, 4,000 analog I/O
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Standard Tasks: Up to 31
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Safety Tasks: 1 dedicated safety task
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Programs per Task: 100 programs
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Event Tasks: Supports all trigger types
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Built-in Communication: 1 USB port
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Optional Communication Adapters: EtherNet/IP, ControlNet, DeviceNet
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Redundancy: Not supported
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I/O Memory: 0.98 MB
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Current Draw @ 1.2 VDC: 5 mA
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Current Draw @ 5.1 VDC: 800 mA
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Power Dissipation: 2.5 W
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Thermal Dissipation: 8.5 BTU/hr
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Isolation Voltage: 30 V continuous (basic insulation type)
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Enclosure Rating: Open-style (no enclosure)
Application Scenarios
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Safety-Critical Automation: Ideal for applications requiring integrated safety control alongside standard automation tasks
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Large-Scale Systems: Supports extensive I/O capacity for complex manufacturing and process environments
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Flexible Integration: Compatible with multiple communication adapters for diverse industrial networks
FAQ
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Q: What distinguishes the 1756-L71S from standard ControlLogix controllers? A: The 1756-L71S includes dedicated safety memory and tasks, making it suitable for GuardLogix safety applications.
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Q: Does this controller support redundancy? A: No, redundancy is not supported in this model.
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Q: How many programs can run per task? A: Each task can support up to 100 programs.
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Q: What communication options are available? A: Built-in USB plus optional EtherNet/IP, ControlNet, and DeviceNet adapters.
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Q: How does this compare to the 1756-L72S? A: The 1756-L71S offers 2 MB user memory, while the 1756-L72S provides 4 MB, making the latter better suited for larger applications.
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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Marshalling Cabinet Preventive Maintenance: Essential Healthiness Checks for PLC, DCS, and ESD Systems
Marshalling cabinets serve as the vital interface between field instrumentation and control room electronics in modern process facilities. Regular preventive maintenance of these cabinets ensures signal integrity across programmable logic controllers (PLCs), distributed control systems (DCS), and emergency shutdown (ESD) networks. System technicians must execute structured inspection protocols to mitigate environmental risks, identify loose wiring, and maintain continuous operational readiness.
Spatial Computing in Industrial Automation: Elevating PLC and DCS Operations with AR and VR
Industry 4.0 integrates digital intelligence into field operations, transforming factory automation landscapes worldwide. Spatial technologies—specifically Augmented Reality (AR) and Virtual Reality (VR)—redefine how engineers interact with industrial control systems. By bridging computer-generated CAD models with real-time operational technology (OT) data, immersive displays enable intuitive monitoring, rapid diagnostics, and safer maintenance across complex processing facilities.