Allen-Bradley 1745-M1 EEPROM PLC Memory Module

Allen-Bradley 1745-M1 EEPROM Memory Module, Series B, catalog 459070-0010, is an EEPROM-based memory cartridge for Allen-Bradley SLC-100 and SLC-150 programmable controllers. This non-volatile memory module provides persistent storage for the controller's user logic, retaining the program across power cycles when installed in the appropriate SLC chassis. The Series B revision identifies a specific production subset within the 1745 family, so ensure compatibility with your controller's hardware revision. As a plug-in module, the 1745-M1 interfaces with the SLC memory slot dedicated to memory modules, enabling straightforward installation and replacement without altering the CPU or I/O hardware. Typical use cases include preserving the user program for legacy SLC-100/150 systems or swapping memory content during service, upgrade, or archival tasks on early AB platforms. This module represents Rockwell Automation's legacy memory solution for the SLC family, offering stable, non-volatile storage in a compact, module-based form factor.