Description 

The Allen-Bradley/Rockwell Automation 1764-MM2RTC is a specialized memory module designed for the MicroLogix 1500 series. featuring a built-in real-time clock (RTC). With a capacity of 16K. it stores data and application programs for various MicroLogix 1500 controllers. The module’s battery has a lifespan of up to 5 years. To maximize battery life. it is recommended to store the module in temperatures ranging from -40 to 40 degrees Celsius. as higher temperatures can significantly reduce battery longevity.

Technical Specifications 

Information About 1764-MM2RTC

The Allen-Bradley 1764-MM2RTC is a memory and real-time clock module designed for the MicroLogix 1500 series by Allen-Bradley. It is compatible with controllers like the 1764-LRP and 1764-LSP. offering a 16KB memory capacity and a real-time clock function. This module is crucial for storing large programs and supports functionalities such as program backup. data file protection during downloads. and program comparison. It can be inserted or removed from the controller without risk of damage. though it requires a power cycle or switch to PROGRAM or STOP mode for recognition if inserted during RUN mode.

The real-time clock provides date and time information to the controller’s RTC function file. ensuring accurate timekeeping for applications like HVAC and BMS systems. This accuracy varies with temperature; at 25°C (77°F). it ranges from approximately +36 to -68 seconds per month. The module’s 16KB non-volatile memory is essential for retaining programs and data despite power surges or battery drain. independent of a lithium battery for memory retention.

Manufacturer information

Allen-Bradley. a brand of Rockwell Automation. specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs). motion control systems. safety devices. motor control equipment. automation software. and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.