Allen-Bradley 1745-M1 EEPROM Memory Module For SLC 500

The Allen-Bradley 1745-M1 EEPROM Memory Module is a nonvolatile EEPROM cartridge designed to accompany SLC-100 and SLC-150 programmable controllers, delivering persistent storage for the processor's program and data. By storing the user program and related data in EEPROM, the module enables backup, transfer, and recovery of a PLC application, allowing a configured program to be restored after power cycles, hardware changes, or field service without relying solely on RAM. The 1745-M1 is installed in the dedicated memory slot of compatible SLC-100/150 CPUs, serving as a dedicated repository for control logic and configuration data that must survive power loss. Common use cases include preserving a working program during upgrades, migrating configurations between controllers, and supporting rapid recovery in field deployments where exact program state must be preserved across maintenance operations. Because the module relies on EEPROM technology, stored contents remain intact without power, making it suitable for long-term backups and reliable program recovery in field service scenarios.