Allen-Bradley 1770-XO Lithium Battery Module is a dedicated memory-backup battery for SLC 500 controllers, designed to preserve RAM contents when primary power is removed. Used with compatible SLC 500 CPU modules in a rack, this lithium battery module keeps critical data intact during outages and enables faster recovery when power returns. As a Rockwell Automation part (1770-XO), it serves as the memory retention accessory for legacy SLC 500 PLC systems.
