OVERVIEW

Official designation: Allen-Bradley 1764-MM2 (MicroLogix 1500, Memory Module)

Role/Application: Removable memory module providing 16 Kbytes of non-volatile storage for program backup and transfer, featuring Real-Time Clock communication support for MicroLogix 1500 systems.

KEY SPECS SUMMARY

Power: Not applicable, non-volatile memory

Interfaces / Ports: Memory module slot (internal)

Indicators: Program compare status file S:2/9

Operating Temp: 0 to 55 degrees C

Platform / Compatibility: 1764-LSP and 1764-LRP controllers

Limit: 16 Kbytes user program and data

Lifecycle: Discontinued/Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the primary memory capacity of the 1764-MM2 module?

A: The module provides a total storage capacity of 16 Kbytes for the controller's user program and data files.

Wiring & Installation:

Q: Is the 1764-MM2 module designed for removal or insertion while the controller power is applied?

A: Yes, the module supports removal and insertion under power for ease of maintenance.

Troubleshooting & Compatibility:

Q: What status indicator is available to check for differences between the program in the CPU and the memory module?

A: The system status bit S:2/9 is utilized for indicating a memory module program compare fault.

Replacement & Upgrades:

Q: What is the direct replacement or higher capacity equivalent memory module available for the MicroLogix 1500 platform?

A: The MicroLogix 1500 system including this module is Discontinued/Obsolete with no designated replacement part.