What sits on the BOM line
The Omron R88A-CA1A005SF-E is the brake-less cable variant from the R88A family, specified to land on the servo motor side of a motion axis rather than the drive side, and the order code is the line a buyer needs to keep intact on the BOM if the axis was originally wired without a holding brake lead pair.
Where the cable is used
An R88A-series cable of this code pattern runs between an Omron servo drive and the matching R88M servo motor, carrying power and feedback conductors in a single jacket — the brake-less designation means the cable does not include the additional brake lead pair that a vertical-axis or held-load motor would need.