Allen-Bradley 1764-MM1RTC Memory Module

The Allen-Bradley 1764-MM1RTC is a MicroLogix 1500 memory module that bundles 8K of memory with a built-in real-time clock for time-stamped data logging and program storage. It is designed for use with MicroLogix 1500 controllers and installs in the controller's memory module slot to expand on-board storage while enabling precise time-based events. Key specifications include an 8K memory capacity and integrated RTC, and the module carries an IP20-rated enclosure for standard industrial environments. When added to a running MicroLogix 1500, the memory module may not be recognized until a power cycle or when the controller is placed into a non-executing mode (program or fault), so planning outages around updates is advised. The 1764-MM1RTC is cataloged as a Memory Module with Real-time Clock, and is part of the MicroLogix 1500 memory/module family that includes 1764-MM1 (8K) and 1764-MM2 (16K) options. It is commonly used in automation setups requiring extended program storage plus timestamped data in logs or event records.