Overview
The Allen-Bradley 1766-MM1 is a removable memory module designed for the MicroLogix 1400 controller family (Bulletin 1766). This module provides 384 KB of additional storage for user program and data, enabling engineers to expand program capacity, back up critical logic, and transport configurations between controllers. The 1766-MM1 is a durable, hot-swappable memory medium that enhances system flexibility and disaster-recovery capability without requiring a controller restart or power cycle.
Key Features
- 384 KB Memory Capacity – Expands program and data storage beyond internal controller limits
- Hot-Swap Capability – Supports insertion and removal under power with automatic recognition after power cycle
- Write Protection – Memory module write protection prevents accidental data corruption and program deletion
- Program Comparison – Built-in functionality to verify program integrity across modules
- Program Transport – Removable memory enables easy program backup and transfer between MicroLogix 1400 controllers
- Industrial-Grade Reliability – Protects against voltage surges, improper operation, and human error
Technical Specifications
- Memory Capacity: 384 KB
- Compatible Controller Family: MicroLogix 1400 (Bulletin 1766)
- Operating Temperature: -20 to 60°C
- Installation Method: Direct insertion into MicroLogix 1400 memory module slot
- Hot-Swap Support: Yes, with automatic recognition post-power cycle
- Data Protection: Write protection, program compare, auto-recovery after fault
- Certifications: C-Tick, C-UL-us (Class I Division 2), CE, KCC
Typical Applications
The 1766-MM1 memory module is widely used in:
- Manufacturing and Process Control – Backup and transport of production logic between production lines
- Machine Automation – Program storage expansion for complex sequences and state machines
- Data Logging – Extended memory for historical data, recipe storage, and alarm records
- System Upgrades – Migration of proven programs from legacy systems to MicroLogix 1400 controllers
- Field Service and Maintenance – Quick program backup and restoration in emergency situations
Compatibility & Replacements
Compatible With
- MicroLogix 1400 controllers (Bulletin 1766)
- RSLogix 500 programming software
- MicroLogix 1400 series with EtherNet/IP, DF1, DH-485, Modbus RTU, DNP3, and ASCII protocols
- Data logging and recipe storage on compatible MicroLogix 1400 units
Replaces / Drop-In Replacement For
The 1766-MM1 is the standard memory expansion module for MicroLogix 1400 controllers and does not have direct OEM replacements. It is the original equipment manufacturer component for this controller family.
Works With
- RSLogix 500 programming and documentation software
- EtherNet/IP, DF1, and Modbus RTU communication protocols
- MicroLogix 1400 web server and email capabilities
- Compatible with MicroLogix 1400 models: 1766-L32AWA, L32BWA, L32BXB, and other Series A/B variants
