Product Details
Product Overview
The Allen Bradley 1764-MM2 provides critical non-volatile memory expansion and time-stamping capabilities for the MicroLogix 1500 controller platform. This module features 16 KB of EEPROM memory, specifically designed to back up user programs and data logs, ensuring zero data loss during prolonged power outages. Additionally, it integrates a Real-Time Clock (RTC) to support time-scheduled control logic and event logging. We supply this unit as 100% Brand New original factory stock to guarantee the highest data integrity and physical lifespan for your control system.
Technical Specifications
| Feature | Specification Details |
| Manufacturer | Allen Bradley / Rockwell Automation |
| Memory Size | 16 KB |
| Memory Type | EEPROM (Non-volatile) |
| Real-Time Clock | Integrated / Available |
| Current Draw | 350 mA @ 5 V DC |
| Input Voltage | 5 V DC |
| Write Protection | Hardware-supported Write Protection |
| Shock / Vibration | 30 G / 2.5 G |
| Operating Temp | 0 to 55 °C (32 to 131 °F) |
| Enclosure Rating | IP20 |
Engineering Advantages
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Permanent Data Retention: The 1764-MM2 utilizes high-grade EEPROM technology. This ensures the controller retains your user program and register data indefinitely without requiring battery power, solving the problem of memory loss during long-term machinery shutdowns.
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Precision Time Management: The built-in Real-Time Clock (RTC) allows the MicroLogix 1500 to execute time-of-day automation and precise fault logging. This hardware eliminates the drift common in software-based timers, providing accurate timestamps for industrial audits.
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Enhanced Security via Write Protection: The module includes dedicated Write Protection functionality. This prevents unauthorized or accidental overwriting of the backup program, ensuring that the machine always reboots to a verified, safe state after a system reset.
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Ruggedized Industrial Build: With a shock resistance rating of 30 G and vibration tolerance of 2.5 G, the 1764-MM2 thrives in high-vibration environments like stamping presses or mobile equipment. The compact design snaps directly into the processor base, maintaining a secure electrical connection even under mechanical stress.
FAQs
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Does the 1764-MM2 require a battery for the memory to function?
No. The memory uses EEPROM technology, which stores data without a power source. However, the Real-Time Clock (RTC) feature utilizes the processor's internal power management to maintain time during power-down cycles.
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Can I swap memory modules while the MicroLogix 1500 is powered on?
No. You must remove power from the controller before installing or removing the 1764-MM2. Inserting the module while energized risks corrupting the EEPROM data or damaging the communication pins on the processor base.
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What is the difference between the 1764-MM1 and the 1764-MM2?
The 1764-MM2 provides twice the memory capacity (16 KB) compared to the 1764-MM1 (8 KB) and includes the integrated Real-Time Clock. If your logic requires time-stamping or large data arrays, the 1764-MM2 is the mandatory upgrade.
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Is this a "New Surplus" or "Refurbished" item?
Neither. We guarantee this product is 100% Brand New in the original manufacturer’s packaging. It carries the original UPC 611320238037 and has never been previously installed or energized.
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 Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.