Product Details
Product Overview
The Allen Bradley 1756-L73 functions as a high-performance central processing unit within the ControlLogix 5570 family. This Logix5573 controller manages complex discrete, motion, and process applications with high-speed execution and expanded memory capacity. We offer this module as 100% Brand New and Factory Original, ensuring your automation architecture benefits from the latest silicon revisions and full hardware longevity.
Technical Specifications
The 1756-L73 provides significant computational overhead for data-intensive industrial environments:
| Feature | Specification |
| Product Series | ControlLogix 5573 |
| User Memory | 8 MB |
| I/O Memory | 0.98 MB |
| Communication Port | USB 2.0 (Programming and Configuration) |
| Controller Connections | 500 Max |
| Local I/O Capacity | 128,000 Digital / 4,000 Analog |
| Current Draw (1.2 VDC) | 5 mA |
| Current Draw (5.1 VDC) | 800 mA |
| Visual Diagnostics | 4-Character Alpha/Numeric Display |
| Weight | 0.53 lbs (0.24 kg) |
Engineering Advantages
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Elimination of Internal Batteries: The 1756-L73 utilizes energy storage modules (ESM) to power non-volatile memory during shutdowns. This removes the need for scheduled battery replacements and eliminates the risk of memory loss due to sudden battery failure.
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High-Speed Data Processing: The Logix5573 architecture significantly reduces scan times compared to previous generations. It handles high-axis count motion control and complex PID loops simultaneously without degrading system responsiveness.
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Rapid Programming Access: The integrated USB 2.0 port provides a high-speed interface for logic downloads and online monitoring. This local port simplifies commissioning by allowing engineers to bypass complex network configurations for direct hardware access.
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Enhanced On-Module Diagnostics: The 4-character scrolling display provides real-time status codes and error messages. This allows maintenance teams to identify fault conditions or firmware mismatches immediately without connecting a laptop.
FAQs
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Is this 1756-L73 unit brand new?
Yes. Every unit we supply is 100% Brand New in the original manufacturer’s box. We do not provide refurbished or used surplus modules, guaranteeing the full integrity of the internal non-volatile memory.
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Does this controller require a separate battery?
No. The 1756-L73 uses a Capacitor-based Energy Storage Module (ESM). This module charges while the rack has power and provides enough energy to write the project to internal flash memory during a power loss event.
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Can I use the 1756-L73 in a redundant chassis configuration?
Yes. This controller supports high-availability redundancy. When paired with a 1756-RM2 Redundancy Module and an identical 1756-L73 in a secondary chassis, it provides seamless switchover capabilities for critical processes.
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What software version do I need for this module?
The 1756-L73 requires Studio 5000 Logix Designer (or RSLogix 5000 version 20 and later). Always ensure your software version supports the firmware revision installed on the hardware for full feature compatibility.
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
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.