OMRON EEROMH PLC Expansion Module, EEPROM Memory

For an MRO planner, that means the cassette can be specified into a BOM as a keep-on-the-shelf critical spare for any OMRON CPU that takes an EEROMH — no need to overstock because the part is current, but one should still sit next to the controller it backs up because a dead memory cassette during a controller swap is a line-down event.