Allen Bradley 1766-MM1 MicroLogix 1400 Memory Module

Allen Bradley 1766-MM1 MicroLogix 1400 Memory Module

The Allen Bradley 1766-MM1, also cataloged as the 1766-MM1 Memory Module, operates as a dedicated hardware component for firmware backup and application program storage within MicroLogix 1400 PLC platforms.

Hardware Specifications

Backplane Communication and Execution Attributes

The Allen Bradley 1766-MM1 module provides non-volatile data logging and user program backup for MicroLogix 1400 processors. Designed to preserve system ladder logic during complete power loss or primary battery failure, the module supports automatic flash loading upon power-up routines. The memory architecture enforces strict backplane bus communication velocity Licences and program verification cycles, ensuring deterministic logic execution and seamless firmware flash compatibility across network nodes.

Frequently Asked Questions

Q: Can the 1766-MM1 memory module be installed or removed while the MicroLogix 1400 controller is powered?

A: No, power to the controller must be completely de-energized before inserting or removing the memory module to avoid memory corruption or physical pin damage.

Q: How is automatic program loading configured using the 1766-MM1 module?

A: Auto-loading behavior (such as "Load on Error" or "Load Always") is configured in the controller properties within RSLogix 500 programming software prior to downloading the project to the memory module.

Field Installation Guidelines

• Remove 24 VDC or AC power from the MicroLogix 1400 controller before opening the memory module protective cover.

• Touch a grounded metal surface to discharge static electricity prior to handling the electrostatic-sensitive 1766-MM1 card.

• Align the memory module keying tabs with the dedicated memory socket on the front face of the controller.

• Press the module firmly into the socket until the retaining clips click securely into place.

• Restore controller power and verify that the controller diagnostic LCD or software status indicates successful memory module detection.