Allen-Bradley 1766-MM1 MicroLogix 1400 Memory Module for Backup and Recovery

Product Overview

The 1766-MM1 is a memory module designed specifically for the MicroLogix 1400 series. It offers an additional 384 KB of user memory, enabling reliable backup and transport of programs between controllers. This component is engineered to prevent accidental deletion or corruption of critical data, thereby increasing process availability.

Technical Specifications Breakdown

Key parameters for the 1766-MM1 are listed below for quick reference:

Industry Applications

Backup for Critical Processes

In press control and other safety-sensitive applications, the 1766-MM1 provides special security features that protect program integrity. By storing a verified copy of the user program, operators can quickly recover from faults without manual reprogramming.

Program Transport Across Multiple Controllers

Facilities using multiple MicroLogix 1400 controllers (such as 1766-L32AWA, 1766-L32BWA, 1766-L32BXB) can use the memory module to transport programs between units. This simplifies deployment of standardized logic across production lines.

Protection Against Data Corruption

Voltage surges, improper operation, and human error are common causes of program corruption. The 1766-MM1 acts as a write-protected backup, ensuring that a clean copy of the program is always available for automatic recovery.

Installation & Setup Guidance

Insert the 1766-MM1 directly into the Memory Module slot of a compatible MicroLogix 1400 controller. The controller ships with the slot and cover in place. To configure automatic loading, set bit control S:1/11 "Load Memory Module Always" as needed. The module can be inserted or removed under power, though a power cycle is required for the controller to recognize it. For initial setup, follow the system prompts to command the controller to load from the memory module.

Maintenance & Reliability

The 1766-MM1 is designed for reliable operation within 0-55 deg.C environments. No routine maintenance is required beyond periodic inspection of the connection. The module supports write protection for data files, reducing the risk of accidental overwrites. In case of a controller fault, auto-recovery through a power cycle restores normal operation.

The Challenge of Program Integrity in Critical Control Systems

In many industrial environments, a single power surge or operator error can corrupt controller data, leading to unplanned shutdowns and costly downtime. The Allen-Bradley 1766-MM1 memory module directly addresses this vulnerability by providing a dedicated, secure storage medium for user programs and data within MicroLogix 1400 systems.

Compatibility & Integration

This memory module is compatible with the following MicroLogix 1400 controllers: 1766-L32AWA, 1766-L32AWAA, 1766-L32BWA, 1766-L32BWAA, 1766-L32BXB, and 1766-L32BXBA. The module supports program comparison, data file protection, and memory module write protection.

Selection Guide & Purchasing Advice

When selecting a memory module for your MicroLogix 1400 system, verify controller compatibility and required memory capacity. The 1766-MM1 offers 384 KB of user memory, sufficient for most program backup and transport needs. Please verify current lifecycle status and availability with AutoDCSTech before ordering. AutoDCSTech stocks genuine Allen-Bradley components to ensure reliable operation.