Allen-Bradley 1764-MM2 – MicroLogix 1500 Memory Expansion Module | Rockwell Automation
Engineering Background
The Allen-Bradley 1764-MM2 is a dedicated memory expansion module engineered for the MicroLogix 1500 programmable logic controller platform (catalog series 1764). Designed by Rockwell Automation, it extends the base controller’s user program and data memory capacity, enabling engineers to deploy more complex ladder logic, function block, and structured text programs without migrating to a larger PLC chassis. The module interfaces directly with the MicroLogix 1500 base unit via the internal memory bus, requiring no external wiring or power supply.
Product Positioning
The 1764-MM2 is the preferred memory upgrade path for MicroLogix 1500 installations where program growth, additional data tables, or expanded recipe storage demands exceed the base controller’s onboard capacity. It is widely deployed in OEM machine control, conveyor systems, HVAC automation, and process control panels across North America, Europe, and Asia-Pacific industrial facilities.
Complete Technical Specifications
- Catalog Number: 1764-MM2
- Compatible Platform: Allen-Bradley MicroLogix 1500 (1764 series)
- Memory Type: Flash EEPROM (non-volatile) + User RAM expansion
- User Program Memory: 32K words (32,768 words)
- Data Table Memory: Expanded data storage for timers, counters, integers, floats, and strings
- Non-Volatile Backup: Yes – program retained on power loss without battery
- Interface: Direct plug-in to MicroLogix 1500 base unit memory slot
- Operating Temperature: 0 °C to +60 °C (32 °F to 140 °F)
- Storage Temperature: -40 °C to +85 °C
- Relative Humidity: 5% to 95% non-condensing
- Vibration: IEC 68-2-6 compliant
- Shock: IEC 68-2-27 compliant
- Certifications: UL Listed, CE Marked, CSA Certified, RoHS Compliant
- Manufacturer: Rockwell Automation / Allen-Bradley
- Country of Origin: USA
- Weight: Approx. 50 g
Proven Application Environments
- OEM machine control panels requiring expanded ladder logic programs
- Conveyor and material handling systems with complex sequencing routines
- HVAC and building automation controllers with large data table requirements
- Food & beverage processing lines with recipe management (multiple data sets)
- Water/wastewater treatment PLC panels with extended I/O mapping
- Automotive assembly line control with high-density timer/counter tables
- Retrofit and upgrade projects replacing older MicroLogix 1500 base units
Engineering Advantages
- Non-volatile EEPROM: Program and data survive power outages without a backup battery, reducing maintenance overhead.
- Seamless integration: Plug-and-play installation into the MicroLogix 1500 memory slot — no RSLogix 500 hardware reconfiguration required beyond memory size acknowledgment.
- Scalable architecture: Allows engineers to maximize the MicroLogix 1500 platform investment before requiring a chassis upgrade to ControlLogix or CompactLogix.
- Compact form factor: Adds significant memory capacity with zero panel space penalty.
- Long-term availability: Konmask.com maintains verified OEM stock to support legacy system maintenance and new installations.
System Architecture & Signal Flow
The 1764-MM2 installs into the dedicated memory expansion slot on the MicroLogix 1500 base unit (1764-LSP or 1764-LRP). Upon power-up, the processor automatically detects the module and maps the expanded memory into the user program and data table address space. RSLogix 500 (v7.0 or later) or Studio 5000 Logix Designer (in compatibility mode) will reflect the expanded memory capacity in the controller properties dialog. No firmware update is required on the base unit for standard 1764-MM2 installation.
Installation sequence: Power down controller → Insert 1764-MM2 into memory slot → Power up → Verify memory size in RSLogix 500 Controller Properties → Download updated program.
Sourcing & Quality Verification
- All 1764-MM2 units sourced by Konmask.com are OEM-origin Allen-Bradley components — not aftermarket or counterfeit.
- Each unit undergoes incoming inspection including label verification, date code review, and functional continuity check.
- Traceability documentation available upon request for regulated industries (pharma, food, automotive).
- Units shipped in anti-static packaging with original Rockwell Automation labeling intact.
- Konmask.com is an independent distributor specializing in Allen-Bradley, Siemens, Schneider Electric, and Omron automation components.
Procurement Process
- Lead time: In-stock units ship within 1–3 business days; ex-stock orders confirmed same day.
- MOQ: 1 piece (no minimum order quantity).
- Payment: T/T bank transfer, PayPal, credit card via Shopify Payments.
- Shipping: DHL Express, FedEx International Priority, UPS Worldwide — with full tracking.
- Export compliance: EAR99 classification; no export license required for most destinations.
- RFQ for bulk orders: Contact support@konmask.com for volume pricing on 5+ units.
Technical FAQ
Q: Is the 1764-MM2 compatible with both 1764-LSP and 1764-LRP base units?
A: Yes. The 1764-MM2 is compatible with all MicroLogix 1500 base unit variants including the 1764-LSP (standard) and 1764-LRP (relay output) processors.
Q: Can I use the 1764-MM2 to back up my program to EEPROM?
A: Yes. The module supports program store-to-EEPROM and load-from-EEPROM functions via RSLogix 500, enabling fast controller replacement without a programming terminal on-site.
Q: Does installing the 1764-MM2 require a firmware upgrade on the MicroLogix 1500?
A: No firmware upgrade is required. The base unit automatically recognizes the module at power-up.
Q: What is the difference between 1764-MM1 and 1764-MM2?
A: The 1764-MM1 provides 8K words of user program memory; the 1764-MM2 provides 32K words — four times the capacity, recommended for complex programs with large data tables.
Q: Is a warranty provided?
A: Konmask.com provides a 90-day functional warranty on all components. Extended warranty and exchange programs available — contact us for details.
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